| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
misc: ocxl: fix possible refcount leak in afu_ioctl()
eventfd_ctx_put need to be called to put the refcount that gotten by
eventfd_ctx_fdget when ocxl_irq_set_handler fails. |
| In the Linux kernel, the following vulnerability has been resolved:
ksmbd: Fix resource leak in ksmbd_session_rpc_open()
When ksmbd_rpc_open() fails then it must call ksmbd_rpc_id_free() to
undo the result of ksmbd_ipc_id_alloc(). |
| In the Linux kernel, the following vulnerability has been resolved:
wifi: ar5523: Fix use-after-free on ar5523_cmd() timed out
syzkaller reported use-after-free with the stack trace like below [1]:
[ 38.960489][ C3] ==================================================================
[ 38.963216][ C3] BUG: KASAN: use-after-free in ar5523_cmd_tx_cb+0x220/0x240
[ 38.964950][ C3] Read of size 8 at addr ffff888048e03450 by task swapper/3/0
[ 38.966363][ C3]
[ 38.967053][ C3] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 6.0.0-09039-ga6afa4199d3d-dirty #18
[ 38.968464][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-1.fc36 04/01/2014
[ 38.969959][ C3] Call Trace:
[ 38.970841][ C3] <IRQ>
[ 38.971663][ C3] dump_stack_lvl+0xfc/0x174
[ 38.972620][ C3] print_report.cold+0x2c3/0x752
[ 38.973626][ C3] ? ar5523_cmd_tx_cb+0x220/0x240
[ 38.974644][ C3] kasan_report+0xb1/0x1d0
[ 38.975720][ C3] ? ar5523_cmd_tx_cb+0x220/0x240
[ 38.976831][ C3] ar5523_cmd_tx_cb+0x220/0x240
[ 38.978412][ C3] __usb_hcd_giveback_urb+0x353/0x5b0
[ 38.979755][ C3] usb_hcd_giveback_urb+0x385/0x430
[ 38.981266][ C3] dummy_timer+0x140c/0x34e0
[ 38.982925][ C3] ? notifier_call_chain+0xb5/0x1e0
[ 38.984761][ C3] ? rcu_read_lock_sched_held+0xb/0x60
[ 38.986242][ C3] ? lock_release+0x51c/0x790
[ 38.987323][ C3] ? _raw_read_unlock_irqrestore+0x37/0x70
[ 38.988483][ C3] ? __wake_up_common_lock+0xde/0x130
[ 38.989621][ C3] ? reacquire_held_locks+0x4a0/0x4a0
[ 38.990777][ C3] ? lock_acquire+0x472/0x550
[ 38.991919][ C3] ? rcu_read_lock_sched_held+0xb/0x60
[ 38.993138][ C3] ? lock_acquire+0x472/0x550
[ 38.994890][ C3] ? dummy_urb_enqueue+0x860/0x860
[ 38.996266][ C3] ? do_raw_spin_unlock+0x16f/0x230
[ 38.997670][ C3] ? dummy_urb_enqueue+0x860/0x860
[ 38.999116][ C3] call_timer_fn+0x1a0/0x6a0
[ 39.000668][ C3] ? add_timer_on+0x4a0/0x4a0
[ 39.002137][ C3] ? reacquire_held_locks+0x4a0/0x4a0
[ 39.003809][ C3] ? __next_timer_interrupt+0x226/0x2a0
[ 39.005509][ C3] __run_timers.part.0+0x69a/0xac0
[ 39.007025][ C3] ? dummy_urb_enqueue+0x860/0x860
[ 39.008716][ C3] ? call_timer_fn+0x6a0/0x6a0
[ 39.010254][ C3] ? cpuacct_percpu_seq_show+0x10/0x10
[ 39.011795][ C3] ? kvm_sched_clock_read+0x14/0x40
[ 39.013277][ C3] ? sched_clock_cpu+0x69/0x2b0
[ 39.014724][ C3] run_timer_softirq+0xb6/0x1d0
[ 39.016196][ C3] __do_softirq+0x1d2/0x9be
[ 39.017616][ C3] __irq_exit_rcu+0xeb/0x190
[ 39.019004][ C3] irq_exit_rcu+0x5/0x20
[ 39.020361][ C3] sysvec_apic_timer_interrupt+0x8f/0xb0
[ 39.021965][ C3] </IRQ>
[ 39.023237][ C3] <TASK>
In ar5523_probe(), ar5523_host_available() calls ar5523_cmd() as below
(there are other functions which finally call ar5523_cmd()):
ar5523_probe()
-> ar5523_host_available()
-> ar5523_cmd_read()
-> ar5523_cmd()
If ar5523_cmd() timed out, then ar5523_host_available() failed and
ar5523_probe() freed the device structure. So, ar5523_cmd_tx_cb()
might touch the freed structure.
This patch fixes this issue by canceling in-flight tx cmd if submitted
urb timed out. |
| In the Linux kernel, the following vulnerability has been resolved:
media: dvb-frontends: fix leak of memory fw |
| In the Linux kernel, the following vulnerability has been resolved:
seccomp: Move copy_seccomp() to no failure path.
Our syzbot instance reported memory leaks in do_seccomp() [0], similar
to the report [1]. It shows that we miss freeing struct seccomp_filter
and some objects included in it.
We can reproduce the issue with the program below [2] which calls one
seccomp() and two clone() syscalls.
The first clone()d child exits earlier than its parent and sends a
signal to kill it during the second clone(), more precisely before the
fatal_signal_pending() test in copy_process(). When the parent receives
the signal, it has to destroy the embryonic process and return -EINTR to
user space. In the failure path, we have to call seccomp_filter_release()
to decrement the filter's refcount.
Initially, we called it in free_task() called from the failure path, but
the commit 3a15fb6ed92c ("seccomp: release filter after task is fully
dead") moved it to release_task() to notify user space as early as possible
that the filter is no longer used.
To keep the change and current seccomp refcount semantics, let's move
copy_seccomp() just after the signal check and add a WARN_ON_ONCE() in
free_task() for future debugging.
[0]:
unreferenced object 0xffff8880063add00 (size 256):
comm "repro_seccomp", pid 230, jiffies 4294687090 (age 9.914s)
hex dump (first 32 bytes):
01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
backtrace:
do_seccomp (./include/linux/slab.h:600 ./include/linux/slab.h:733 kernel/seccomp.c:666 kernel/seccomp.c:708 kernel/seccomp.c:1871 kernel/seccomp.c:1991)
do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
unreferenced object 0xffffc90000035000 (size 4096):
comm "repro_seccomp", pid 230, jiffies 4294687090 (age 9.915s)
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 05 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
__vmalloc_node_range (mm/vmalloc.c:3226)
__vmalloc_node (mm/vmalloc.c:3261 (discriminator 4))
bpf_prog_alloc_no_stats (kernel/bpf/core.c:91)
bpf_prog_alloc (kernel/bpf/core.c:129)
bpf_prog_create_from_user (net/core/filter.c:1414)
do_seccomp (kernel/seccomp.c:671 kernel/seccomp.c:708 kernel/seccomp.c:1871 kernel/seccomp.c:1991)
do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
unreferenced object 0xffff888003fa1000 (size 1024):
comm "repro_seccomp", pid 230, jiffies 4294687090 (age 9.915s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
bpf_prog_alloc_no_stats (./include/linux/slab.h:600 ./include/linux/slab.h:733 kernel/bpf/core.c:95)
bpf_prog_alloc (kernel/bpf/core.c:129)
bpf_prog_create_from_user (net/core/filter.c:1414)
do_seccomp (kernel/seccomp.c:671 kernel/seccomp.c:708 kernel/seccomp.c:1871 kernel/seccomp.c:1991)
do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
unreferenced object 0xffff888006360240 (size 16):
comm "repro_seccomp", pid 230, jiffies 4294687090 (age 9.915s)
hex dump (first 16 bytes):
01 00 37 00 76 65 72 6c e0 83 01 06 80 88 ff ff ..7.verl........
backtrace:
bpf_prog_store_orig_filter (net/core/filter.c:1137)
bpf_prog_create_from_user (net/core/filter.c:1428)
do_seccomp (kernel/seccomp.c:671 kernel/seccomp.c:708 kernel/seccomp.c:1871 kernel/seccomp.c:1991)
do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
unreferenced object 0xffff888
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
uio: uio_dmem_genirq: Fix missing unlock in irq configuration
Commit b74351287d4b ("uio: fix a sleep-in-atomic-context bug in
uio_dmem_genirq_irqcontrol()") started calling disable_irq() without
holding the spinlock because it can sleep. However, that fix introduced
another bug: if interrupt is already disabled and a new disable request
comes in, then the spinlock is not unlocked:
root@localhost:~# printf '\x00\x00\x00\x00' > /dev/uio0
root@localhost:~# printf '\x00\x00\x00\x00' > /dev/uio0
root@localhost:~# [ 14.851538] BUG: scheduling while atomic: bash/223/0x00000002
[ 14.851991] Modules linked in: uio_dmem_genirq uio myfpga(OE) bochs drm_vram_helper drm_ttm_helper ttm drm_kms_helper drm snd_pcm ppdev joydev psmouse snd_timer snd e1000fb_sys_fops syscopyarea parport sysfillrect soundcore sysimgblt input_leds pcspkr i2c_piix4 serio_raw floppy evbug qemu_fw_cfg mac_hid pata_acpi ip_tables x_tables autofs4 [last unloaded: parport_pc]
[ 14.854206] CPU: 0 PID: 223 Comm: bash Tainted: G OE 6.0.0-rc7 #21
[ 14.854786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
[ 14.855664] Call Trace:
[ 14.855861] <TASK>
[ 14.856025] dump_stack_lvl+0x4d/0x67
[ 14.856325] dump_stack+0x14/0x1a
[ 14.856583] __schedule_bug.cold+0x4b/0x5c
[ 14.856915] __schedule+0xe81/0x13d0
[ 14.857199] ? idr_find+0x13/0x20
[ 14.857456] ? get_work_pool+0x2d/0x50
[ 14.857756] ? __flush_work+0x233/0x280
[ 14.858068] ? __schedule+0xa95/0x13d0
[ 14.858307] ? idr_find+0x13/0x20
[ 14.858519] ? get_work_pool+0x2d/0x50
[ 14.858798] schedule+0x6c/0x100
[ 14.859009] schedule_hrtimeout_range_clock+0xff/0x110
[ 14.859335] ? tty_write_room+0x1f/0x30
[ 14.859598] ? n_tty_poll+0x1ec/0x220
[ 14.859830] ? tty_ldisc_deref+0x1a/0x20
[ 14.860090] schedule_hrtimeout_range+0x17/0x20
[ 14.860373] do_select+0x596/0x840
[ 14.860627] ? __kernel_text_address+0x16/0x50
[ 14.860954] ? poll_freewait+0xb0/0xb0
[ 14.861235] ? poll_freewait+0xb0/0xb0
[ 14.861517] ? rpm_resume+0x49d/0x780
[ 14.861798] ? common_interrupt+0x59/0xa0
[ 14.862127] ? asm_common_interrupt+0x2b/0x40
[ 14.862511] ? __uart_start.isra.0+0x61/0x70
[ 14.862902] ? __check_object_size+0x61/0x280
[ 14.863255] core_sys_select+0x1c6/0x400
[ 14.863575] ? vfs_write+0x1c9/0x3d0
[ 14.863853] ? vfs_write+0x1c9/0x3d0
[ 14.864121] ? _copy_from_user+0x45/0x70
[ 14.864526] do_pselect.constprop.0+0xb3/0xf0
[ 14.864893] ? do_syscall_64+0x6d/0x90
[ 14.865228] ? do_syscall_64+0x6d/0x90
[ 14.865556] __x64_sys_pselect6+0x76/0xa0
[ 14.865906] do_syscall_64+0x60/0x90
[ 14.866214] ? syscall_exit_to_user_mode+0x2a/0x50
[ 14.866640] ? do_syscall_64+0x6d/0x90
[ 14.866972] ? do_syscall_64+0x6d/0x90
[ 14.867286] ? do_syscall_64+0x6d/0x90
[ 14.867626] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[...] stripped
[ 14.872959] </TASK>
('myfpga' is a simple 'uio_dmem_genirq' driver I wrote to test this)
The implementation of "uio_dmem_genirq" was based on "uio_pdrv_genirq" and
it is used in a similar manner to the "uio_pdrv_genirq" driver with respect
to interrupt configuration and handling. At the time "uio_dmem_genirq" was
introduced, both had the same implementation of the 'uio_info' handlers
irqcontrol() and handler(). Then commit 34cb27528398 ("UIO: Fix concurrency
issue"), which was only applied to "uio_pdrv_genirq", ended up making them
a little different. That commit, among other things, changed disable_irq()
to disable_irq_nosync() in the implementation of irqcontrol(). The
motivation there was to avoid a deadlock between irqcontrol() and
handler(), since it added a spinlock in the irq handler, and disable_irq()
waits for the completion of the irq handler.
By changing disable_irq() to disable_irq_nosync() in irqcontrol(), we also
avoid the sleeping-whil
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
clk: ti: dra7-atl: Fix reference leak in of_dra7_atl_clk_probe
pm_runtime_get_sync() will increment pm usage counter.
Forgetting to putting operation will result in reference leak.
Add missing pm_runtime_put_sync in some error paths. |
| In the Linux kernel, the following vulnerability has been resolved:
platform/chrome: cros_ec_typec: zero out stale pointers
`cros_typec_get_switch_handles` allocates four pointers when obtaining
type-c switch handles. These pointers are all freed if failing to obtain
any of them; therefore, pointers in `port` become stale. The stale
pointers eventually cause use-after-free or double free in later code
paths. Zeroing out all pointer fields after freeing to eliminate these
stale pointers. |
| In the Linux kernel, the following vulnerability has been resolved:
HSI: omap_ssi: Fix refcount leak in ssi_probe
When returning or breaking early from a
for_each_available_child_of_node() loop, we need to explicitly call
of_node_put() on the child node to possibly release the node. |
| In the Linux kernel, the following vulnerability has been resolved:
ext4: fix bug_on in __es_tree_search caused by bad boot loader inode
We got a issue as fllows:
==================================================================
kernel BUG at fs/ext4/extents_status.c:203!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 945 Comm: cat Not tainted 6.0.0-next-20221007-dirty #349
RIP: 0010:ext4_es_end.isra.0+0x34/0x42
RSP: 0018:ffffc9000143b768 EFLAGS: 00010203
RAX: 0000000000000000 RBX: ffff8881769cd0b8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8fc27cf7 RDI: 00000000ffffffff
RBP: ffff8881769cd0bc R08: 0000000000000000 R09: ffffc9000143b5f8
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8881769cd0a0
R13: ffff8881768e5668 R14: 00000000768e52f0 R15: 0000000000000000
FS: 00007f359f7f05c0(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f359f5a2000 CR3: 000000017130c000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__es_tree_search.isra.0+0x6d/0xf5
ext4_es_cache_extent+0xfa/0x230
ext4_cache_extents+0xd2/0x110
ext4_find_extent+0x5d5/0x8c0
ext4_ext_map_blocks+0x9c/0x1d30
ext4_map_blocks+0x431/0xa50
ext4_mpage_readpages+0x48e/0xe40
ext4_readahead+0x47/0x50
read_pages+0x82/0x530
page_cache_ra_unbounded+0x199/0x2a0
do_page_cache_ra+0x47/0x70
page_cache_ra_order+0x242/0x400
ondemand_readahead+0x1e8/0x4b0
page_cache_sync_ra+0xf4/0x110
filemap_get_pages+0x131/0xb20
filemap_read+0xda/0x4b0
generic_file_read_iter+0x13a/0x250
ext4_file_read_iter+0x59/0x1d0
vfs_read+0x28f/0x460
ksys_read+0x73/0x160
__x64_sys_read+0x1e/0x30
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
</TASK>
==================================================================
In the above issue, ioctl invokes the swap_inode_boot_loader function to
swap inode<5> and inode<12>. However, inode<5> contain incorrect imode and
disordered extents, and i_nlink is set to 1. The extents check for inode in
the ext4_iget function can be bypassed bacause 5 is EXT4_BOOT_LOADER_INO.
While links_count is set to 1, the extents are not initialized in
swap_inode_boot_loader. After the ioctl command is executed successfully,
the extents are swapped to inode<12>, in this case, run the `cat` command
to view inode<12>. And Bug_ON is triggered due to the incorrect extents.
When the boot loader inode is not initialized, its imode can be one of the
following:
1) the imode is a bad type, which is marked as bad_inode in ext4_iget and
set to S_IFREG.
2) the imode is good type but not S_IFREG.
3) the imode is S_IFREG.
The BUG_ON may be triggered by bypassing the check in cases 1 and 2.
Therefore, when the boot loader inode is bad_inode or its imode is not
S_IFREG, initialize the inode to avoid triggering the BUG. |
| In the Linux kernel, the following vulnerability has been resolved:
powerpc/kprobes: Fix null pointer reference in arch_prepare_kprobe()
I found a null pointer reference in arch_prepare_kprobe():
# echo 'p cmdline_proc_show' > kprobe_events
# echo 'p cmdline_proc_show+16' >> kprobe_events
Kernel attempted to read user page (0) - exploit attempt? (uid: 0)
BUG: Kernel NULL pointer dereference on read at 0x00000000
Faulting instruction address: 0xc000000000050bfc
Oops: Kernel access of bad area, sig: 11 [#1]
LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV
Modules linked in:
CPU: 0 PID: 122 Comm: sh Not tainted 6.0.0-rc3-00007-gdcf8e5633e2e #10
NIP: c000000000050bfc LR: c000000000050bec CTR: 0000000000005bdc
REGS: c0000000348475b0 TRAP: 0300 Not tainted (6.0.0-rc3-00007-gdcf8e5633e2e)
MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 88002444 XER: 20040006
CFAR: c00000000022d100 DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0
...
NIP arch_prepare_kprobe+0x10c/0x2d0
LR arch_prepare_kprobe+0xfc/0x2d0
Call Trace:
0xc0000000012f77a0 (unreliable)
register_kprobe+0x3c0/0x7a0
__register_trace_kprobe+0x140/0x1a0
__trace_kprobe_create+0x794/0x1040
trace_probe_create+0xc4/0xe0
create_or_delete_trace_kprobe+0x2c/0x80
trace_parse_run_command+0xf0/0x210
probes_write+0x20/0x40
vfs_write+0xfc/0x450
ksys_write+0x84/0x140
system_call_exception+0x17c/0x3a0
system_call_vectored_common+0xe8/0x278
--- interrupt: 3000 at 0x7fffa5682de0
NIP: 00007fffa5682de0 LR: 0000000000000000 CTR: 0000000000000000
REGS: c000000034847e80 TRAP: 3000 Not tainted (6.0.0-rc3-00007-gdcf8e5633e2e)
MSR: 900000000280f033 <SF,HV,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE> CR: 44002408 XER: 00000000
The address being probed has some special:
cmdline_proc_show: Probe based on ftrace
cmdline_proc_show+16: Probe for the next instruction at the ftrace location
The ftrace-based kprobe does not generate kprobe::ainsn::insn, it gets
set to NULL. In arch_prepare_kprobe() it will check for:
...
prev = get_kprobe(p->addr - 1);
preempt_enable_no_resched();
if (prev && ppc_inst_prefixed(ppc_inst_read(prev->ainsn.insn))) {
...
If prev is based on ftrace, 'ppc_inst_read(prev->ainsn.insn)' will occur
with a null pointer reference. At this point prev->addr will not be a
prefixed instruction, so the check can be skipped.
Check if prev is ftrace-based kprobe before reading 'prev->ainsn.insn'
to fix this problem.
[mpe: Trim oops] |
| In the Linux kernel, the following vulnerability has been resolved:
cpufreq: qcom-hw: Fix memory leak in qcom_cpufreq_hw_read_lut()
If "cpu_dev" fails to get opp table in qcom_cpufreq_hw_read_lut(),
the program will return, resulting in "table" resource is not released. |
| In the Linux kernel, the following vulnerability has been resolved:
btrfs: call __btrfs_remove_free_space_cache_locked on cache load failure
Now that lockdep is staying enabled through our entire CI runs I started
seeing the following stack in generic/475
------------[ cut here ]------------
WARNING: CPU: 1 PID: 2171864 at fs/btrfs/discard.c:604 btrfs_discard_update_discardable+0x98/0xb0
CPU: 1 PID: 2171864 Comm: kworker/u4:0 Not tainted 5.19.0-rc8+ #789
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
Workqueue: btrfs-cache btrfs_work_helper
RIP: 0010:btrfs_discard_update_discardable+0x98/0xb0
RSP: 0018:ffffb857c2f7bad0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8c85c605c200 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff86807c5b RDI: ffffffff868a831e
RBP: ffff8c85c4c54000 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8c85c66932f0 R11: 0000000000000001 R12: ffff8c85c3899010
R13: ffff8c85d5be4f40 R14: ffff8c85c4c54000 R15: ffff8c86114bfa80
FS: 0000000000000000(0000) GS:ffff8c863bd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e7f168160 CR3: 000000010289a004 CR4: 0000000000370ee0
Call Trace:
__btrfs_remove_free_space_cache+0x27/0x30
load_free_space_cache+0xad2/0xaf0
caching_thread+0x40b/0x650
? lock_release+0x137/0x2d0
btrfs_work_helper+0xf2/0x3e0
? lock_is_held_type+0xe2/0x140
process_one_work+0x271/0x590
? process_one_work+0x590/0x590
worker_thread+0x52/0x3b0
? process_one_work+0x590/0x590
kthread+0xf0/0x120
? kthread_complete_and_exit+0x20/0x20
ret_from_fork+0x1f/0x30
This is the code
ctl = block_group->free_space_ctl;
discard_ctl = &block_group->fs_info->discard_ctl;
lockdep_assert_held(&ctl->tree_lock);
We have a temporary free space ctl for loading the free space cache in
order to avoid having allocations happening while we're loading the
cache. When we hit an error we free it all up, however this also calls
btrfs_discard_update_discardable, which requires
block_group->free_space_ctl->tree_lock to be held. However this is our
temporary ctl so this lock isn't held. Fix this by calling
__btrfs_remove_free_space_cache_locked instead so that we only clean up
the entries and do not mess with the discardable stats. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/meson: explicitly remove aggregate driver at module unload time
Because component_master_del wasn't being called when unloading the
meson_drm module, the aggregate device would linger forever in the global
aggregate_devices list. That means when unloading and reloading the
meson_dw_hdmi module, component_add would call into
try_to_bring_up_aggregate_device and find the unbound meson_drm aggregate
device.
This would in turn dereference some of the aggregate_device's struct
entries which point to memory automatically freed by the devres API when
unbinding the aggregate device from meson_drv_unbind, and trigger an
use-after-free bug:
[ +0.000014] =============================================================
[ +0.000007] BUG: KASAN: use-after-free in find_components+0x468/0x500
[ +0.000017] Read of size 8 at addr ffff000006731688 by task modprobe/2536
[ +0.000018] CPU: 4 PID: 2536 Comm: modprobe Tainted: G C O 5.19.0-rc6-lrmbkasan+ #1
[ +0.000010] Hardware name: Hardkernel ODROID-N2Plus (DT)
[ +0.000008] Call trace:
[ +0.000005] dump_backtrace+0x1ec/0x280
[ +0.000011] show_stack+0x24/0x80
[ +0.000007] dump_stack_lvl+0x98/0xd4
[ +0.000010] print_address_description.constprop.0+0x80/0x520
[ +0.000011] print_report+0x128/0x260
[ +0.000007] kasan_report+0xb8/0xfc
[ +0.000007] __asan_report_load8_noabort+0x3c/0x50
[ +0.000009] find_components+0x468/0x500
[ +0.000008] try_to_bring_up_aggregate_device+0x64/0x390
[ +0.000009] __component_add+0x1dc/0x49c
[ +0.000009] component_add+0x20/0x30
[ +0.000008] meson_dw_hdmi_probe+0x28/0x34 [meson_dw_hdmi]
[ +0.000013] platform_probe+0xd0/0x220
[ +0.000008] really_probe+0x3ac/0xa80
[ +0.000008] __driver_probe_device+0x1f8/0x400
[ +0.000008] driver_probe_device+0x68/0x1b0
[ +0.000008] __driver_attach+0x20c/0x480
[ +0.000009] bus_for_each_dev+0x114/0x1b0
[ +0.000007] driver_attach+0x48/0x64
[ +0.000009] bus_add_driver+0x390/0x564
[ +0.000007] driver_register+0x1a8/0x3e4
[ +0.000009] __platform_driver_register+0x6c/0x94
[ +0.000007] meson_dw_hdmi_platform_driver_init+0x30/0x1000 [meson_dw_hdmi]
[ +0.000014] do_one_initcall+0xc4/0x2b0
[ +0.000008] do_init_module+0x154/0x570
[ +0.000010] load_module+0x1a78/0x1ea4
[ +0.000008] __do_sys_init_module+0x184/0x1cc
[ +0.000008] __arm64_sys_init_module+0x78/0xb0
[ +0.000008] invoke_syscall+0x74/0x260
[ +0.000008] el0_svc_common.constprop.0+0xcc/0x260
[ +0.000009] do_el0_svc+0x50/0x70
[ +0.000008] el0_svc+0x68/0x1a0
[ +0.000009] el0t_64_sync_handler+0x11c/0x150
[ +0.000009] el0t_64_sync+0x18c/0x190
[ +0.000014] Allocated by task 902:
[ +0.000007] kasan_save_stack+0x2c/0x5c
[ +0.000009] __kasan_kmalloc+0x90/0xd0
[ +0.000007] __kmalloc_node+0x240/0x580
[ +0.000010] memcg_alloc_slab_cgroups+0xa4/0x1ac
[ +0.000010] memcg_slab_post_alloc_hook+0xbc/0x4c0
[ +0.000008] kmem_cache_alloc_node+0x1d0/0x490
[ +0.000009] __alloc_skb+0x1d4/0x310
[ +0.000010] alloc_skb_with_frags+0x8c/0x620
[ +0.000008] sock_alloc_send_pskb+0x5ac/0x6d0
[ +0.000010] unix_dgram_sendmsg+0x2e0/0x12f0
[ +0.000010] sock_sendmsg+0xcc/0x110
[ +0.000007] sock_write_iter+0x1d0/0x304
[ +0.000008] new_sync_write+0x364/0x460
[ +0.000007] vfs_write+0x420/0x5ac
[ +0.000008] ksys_write+0x19c/0x1f0
[ +0.000008] __arm64_sys_write+0x78/0xb0
[ +0.000007] invoke_syscall+0x74/0x260
[ +0.000008] el0_svc_common.constprop.0+0x1a8/0x260
[ +0.000009] do_el0_svc+0x50/0x70
[ +0.000007] el0_svc+0x68/0x1a0
[ +0.000008] el0t_64_sync_handler+0x11c/0x150
[ +0.000008] el0t_64_sync+0x18c/0x190
[ +0.000013] Freed by task 2509:
[ +0.000008] kasan_save_stack+0x2c/0x5c
[ +0.000007] kasan_set_track+0x2c/0x40
[ +0.000008] kasan_set_free_info+0x28/0x50
[ +0.000008] ____kasan_slab_free+0x128/0x1d4
[ +0.000008] __kasan_slab_free+0x18/0x24
[ +0.000007] slab_free_freelist_hook+0x108/0x230
[ +0.000010]
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
virtio-crypto: fix memory leak in virtio_crypto_alg_skcipher_close_session()
'vc_ctrl_req' is alloced in virtio_crypto_alg_skcipher_close_session(),
and should be freed in the invalid ctrl_status->status error handling
case. Otherwise there is a memory leak. |
| In the Linux kernel, the following vulnerability has been resolved:
clk: visconti: Fix memory leak in visconti_register_pll()
@pll->rate_table has allocated memory by kmemdup(), if clk_hw_register()
fails, it should be freed, otherwise it will cause memory leak issue,
this patch fixes it. |
| In the Linux kernel, the following vulnerability has been resolved:
cpufreq/longhaul: handle NULL policy in longhaul_exit
longhaul_exit() was calling cpufreq_cpu_get(0) without checking
for a NULL policy pointer. On some systems, this could lead to a
NULL dereference and a kernel warning or panic.
This patch adds a check using unlikely() and returns early if the
policy is NULL.
Bugzilla: #219962 |
| In the Linux kernel, the following vulnerability has been resolved:
tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()
Use RCU to avoid a pair of atomic operations and a potential
UAF on dst_dev()->flags. |
| In the Linux kernel, the following vulnerability has been resolved:
nvmem: core: Fix memleak in nvmem_register()
dev_set_name will alloc memory for nvmem->dev.kobj.name in
nvmem_register, when nvmem_validate_keepouts failed, nvmem's
memory will be freed and return, but nobody will free memory
for nvmem->dev.kobj.name, there will be memleak, so moving
nvmem_validate_keepouts() after device_register() and let
the device core deal with cleaning name in error cases. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/msm: fix NULL-deref on irq uninstall
In case of early initialisation errors and on platforms that do not use
the DPU controller, the deinitilisation code can be called with the kms
pointer set to NULL.
Patchwork: https://patchwork.freedesktop.org/patch/525104/ |
