Linux: >> Linux Kernel >> 3.18.41 Security Vulnerabilities
In the Linux kernel, the following vulnerability has been resolved:
mm/slub: Avoid list corruption when removing a slab from the full list
Boot with slub_debug=UFPZ.
If allocated object failed in alloc_consistency_checks, all objects of
the slab will be marked as used, and then the slab will be removed from
the partial list.
When an object belonging to the slab got freed later, the remove_full()
function is called. Because the slab is neither on the partial list nor
on the full list, it eventually lead to a list corruption (actually a
list poison being detected).
So we need to mark and isolate the slab page with metadata corruption,
do not put it back in circulation.
Because the debug caches avoid all the fastpaths, reusing the frozen bit
to mark slab page with metadata corruption seems to be fine.
[ 4277.385669] list_del corruption, ffffea00044b3e50->next is LIST_POISON1 (dead000000000100)
[ 4277.387023] ------------[ cut here ]------------
[ 4277.387880] kernel BUG at lib/list_debug.c:56!
[ 4277.388680] invalid opcode: 0000 [#1] PREEMPT SMP PTI
[ 4277.389562] CPU: 5 PID: 90 Comm: kworker/5:1 Kdump: loaded Tainted: G OE 6.6.1-1 #1
[ 4277.392113] Workqueue: xfs-inodegc/vda1 xfs_inodegc_worker [xfs]
[ 4277.393551] RIP: 0010:__list_del_entry_valid_or_report+0x7b/0xc0
[ 4277.394518] Code: 48 91 82 e8 37 f9 9a ff 0f 0b 48 89 fe 48 c7 c7 28 49 91 82 e8 26 f9 9a ff 0f 0b 48 89 fe 48 c7 c7 58 49 91
[ 4277.397292] RSP: 0018:ffffc90000333b38 EFLAGS: 00010082
[ 4277.398202] RAX: 000000000000004e RBX: ffffea00044b3e50 RCX: 0000000000000000
[ 4277.399340] RDX: 0000000000000002 RSI: ffffffff828f8715 RDI: 00000000ffffffff
[ 4277.400545] RBP: ffffea00044b3e40 R08: 0000000000000000 R09: ffffc900003339f0
[ 4277.401710] R10: 0000000000000003 R11: ffffffff82d44088 R12: ffff888112cf9910
[ 4277.402887] R13: 0000000000000001 R14: 0000000000000001 R15: ffff8881000424c0
[ 4277.404049] FS: 0000000000000000(0000) GS:ffff88842fd40000(0000) knlGS:0000000000000000
[ 4277.405357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4277.406389] CR2: 00007f2ad0b24000 CR3: 0000000102a3a006 CR4: 00000000007706e0
[ 4277.407589] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4277.408780] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4277.410000] PKRU: 55555554
[ 4277.410645] Call Trace:
[ 4277.411234] <TASK>
[ 4277.411777] ? die+0x32/0x80
[ 4277.412439] ? do_trap+0xd6/0x100
[ 4277.413150] ? __list_del_entry_valid_or_report+0x7b/0xc0
[ 4277.414158] ? do_error_trap+0x6a/0x90
[ 4277.414948] ? __list_del_entry_valid_or_report+0x7b/0xc0
[ 4277.415915] ? exc_invalid_op+0x4c/0x60
[ 4277.416710] ? __list_del_entry_valid_or_report+0x7b/0xc0
[ 4277.417675] ? asm_exc_invalid_op+0x16/0x20
[ 4277.418482] ? __list_del_entry_valid_or_report+0x7b/0xc0
[ 4277.419466] ? __list_del_entry_valid_or_report+0x7b/0xc0
[ 4277.420410] free_to_partial_list+0x515/0x5e0
[ 4277.421242] ? xfs_iext_remove+0x41a/0xa10 [xfs]
[ 4277.422298] xfs_iext_remove+0x41a/0xa10 [xfs]
[ 4277.423316] ? xfs_inodegc_worker+0xb4/0x1a0 [xfs]
[ 4277.424383] xfs_bmap_del_extent_delay+0x4fe/0x7d0 [xfs]
[ 4277.425490] __xfs_bunmapi+0x50d/0x840 [xfs]
[ 4277.426445] xfs_itruncate_extents_flags+0x13a/0x490 [xfs]
[ 4277.427553] xfs_inactive_truncate+0xa3/0x120 [xfs]
[ 4277.428567] xfs_inactive+0x22d/0x290 [xfs]
[ 4277.429500] xfs_inodegc_worker+0xb4/0x1a0 [xfs]
[ 4277.430479] process_one_work+0x171/0x340
[ 4277.431227] worker_thread+0x277/0x390
[ 4277.431962] ? __pfx_worker_thread+0x10/0x10
[ 4277.432752] kthread+0xf0/0x120
[ 4277.433382] ? __pfx_kthread+0x10/0x10
[ 4277.434134] ret_from_fork+0x2d/0x50
[ 4277.434837] ? __pfx_kthread+0x10/0x10
[ 4277.435566] ret_from_fork_asm+0x1b/0x30
[ 4277.436280] </TASK>
CVSS Score
5.5
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
ovl: Filter invalid inodes with missing lookup function
Add a check to the ovl_dentry_weird() function to prevent the
processing of directory inodes that lack the lookup function.
This is important because such inodes can cause errors in overlayfs
when passed to the lowerstack.
CVSS Score
7.8
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
nfsd: make sure exp active before svc_export_show
The function `e_show` was called with protection from RCU. This only
ensures that `exp` will not be freed. Therefore, the reference count for
`exp` can drop to zero, which will trigger a refcount use-after-free
warning when `exp_get` is called. To resolve this issue, use
`cache_get_rcu` to ensure that `exp` remains active.
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 3 PID: 819 at lib/refcount.c:25
refcount_warn_saturate+0xb1/0x120
CPU: 3 UID: 0 PID: 819 Comm: cat Not tainted 6.12.0-rc3+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.16.1-2.fc37 04/01/2014
RIP: 0010:refcount_warn_saturate+0xb1/0x120
...
Call Trace:
<TASK>
e_show+0x20b/0x230 [nfsd]
seq_read_iter+0x589/0x770
seq_read+0x1e5/0x270
vfs_read+0x125/0x530
ksys_read+0xc1/0x160
do_syscall_64+0x5f/0x170
entry_SYSCALL_64_after_hwframe+0x76/0x7e
CVSS Score
7.8
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: fix usage slab after free
[ +0.000021] BUG: KASAN: slab-use-after-free in drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
[ +0.000027] Read of size 8 at addr ffff8881b8605f88 by task amd_pci_unplug/2147
[ +0.000023] CPU: 6 PID: 2147 Comm: amd_pci_unplug Not tainted 6.10.0+ #1
[ +0.000016] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020
[ +0.000016] Call Trace:
[ +0.000008] <TASK>
[ +0.000009] dump_stack_lvl+0x76/0xa0
[ +0.000017] print_report+0xce/0x5f0
[ +0.000017] ? drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
[ +0.000019] ? srso_return_thunk+0x5/0x5f
[ +0.000015] ? kasan_complete_mode_report_info+0x72/0x200
[ +0.000016] ? drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
[ +0.000019] kasan_report+0xbe/0x110
[ +0.000015] ? drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
[ +0.000023] __asan_report_load8_noabort+0x14/0x30
[ +0.000014] drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
[ +0.000020] ? srso_return_thunk+0x5/0x5f
[ +0.000013] ? __kasan_check_write+0x14/0x30
[ +0.000016] ? __pfx_drm_sched_entity_flush+0x10/0x10 [gpu_sched]
[ +0.000020] ? srso_return_thunk+0x5/0x5f
[ +0.000013] ? __kasan_check_write+0x14/0x30
[ +0.000013] ? srso_return_thunk+0x5/0x5f
[ +0.000013] ? enable_work+0x124/0x220
[ +0.000015] ? __pfx_enable_work+0x10/0x10
[ +0.000013] ? srso_return_thunk+0x5/0x5f
[ +0.000014] ? free_large_kmalloc+0x85/0xf0
[ +0.000016] drm_sched_entity_destroy+0x18/0x30 [gpu_sched]
[ +0.000020] amdgpu_vce_sw_fini+0x55/0x170 [amdgpu]
[ +0.000735] ? __kasan_check_read+0x11/0x20
[ +0.000016] vce_v4_0_sw_fini+0x80/0x110 [amdgpu]
[ +0.000726] amdgpu_device_fini_sw+0x331/0xfc0 [amdgpu]
[ +0.000679] ? mutex_unlock+0x80/0xe0
[ +0.000017] ? __pfx_amdgpu_device_fini_sw+0x10/0x10 [amdgpu]
[ +0.000662] ? srso_return_thunk+0x5/0x5f
[ +0.000014] ? __kasan_check_write+0x14/0x30
[ +0.000013] ? srso_return_thunk+0x5/0x5f
[ +0.000013] ? mutex_unlock+0x80/0xe0
[ +0.000016] amdgpu_driver_release_kms+0x16/0x80 [amdgpu]
[ +0.000663] drm_minor_release+0xc9/0x140 [drm]
[ +0.000081] drm_release+0x1fd/0x390 [drm]
[ +0.000082] __fput+0x36c/0xad0
[ +0.000018] __fput_sync+0x3c/0x50
[ +0.000014] __x64_sys_close+0x7d/0xe0
[ +0.000014] x64_sys_call+0x1bc6/0x2680
[ +0.000014] do_syscall_64+0x70/0x130
[ +0.000014] ? srso_return_thunk+0x5/0x5f
[ +0.000014] ? irqentry_exit_to_user_mode+0x60/0x190
[ +0.000015] ? srso_return_thunk+0x5/0x5f
[ +0.000014] ? irqentry_exit+0x43/0x50
[ +0.000012] ? srso_return_thunk+0x5/0x5f
[ +0.000013] ? exc_page_fault+0x7c/0x110
[ +0.000015] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ +0.000014] RIP: 0033:0x7ffff7b14f67
[ +0.000013] Code: ff e8 0d 16 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 73 ba f7 ff
[ +0.000026] RSP: 002b:00007fffffffe378 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[ +0.000019] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffff7b14f67
[ +0.000014] RDX: 0000000000000000 RSI: 00007ffff7f6f47a RDI: 0000000000000003
[ +0.000014] RBP: 00007fffffffe3a0 R08: 0000555555569890 R09: 0000000000000000
[ +0.000014] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffffffe5c8
[ +0.000013] R13: 00005555555552a9 R14: 0000555555557d48 R15: 00007ffff7ffd040
[ +0.000020] </TASK>
[ +0.000016] Allocated by task 383 on cpu 7 at 26.880319s:
[ +0.000014] kasan_save_stack+0x28/0x60
[ +0.000008] kasan_save_track+0x18/0x70
[ +0.000007] kasan_save_alloc_info+0x38/0x60
[ +0.000007] __kasan_kmalloc+0xc1/0xd0
[ +0.000007] kmalloc_trace_noprof+0x180/0x380
[ +0.000007] drm_sched_init+0x411/0xec0 [gpu_sched]
[ +0.000012] amdgpu_device_init+0x695f/0xa610 [amdgpu]
[ +0.000658] amdgpu_driver_load_kms+0x1a/0x120 [amdgpu]
[ +0.000662] amdgpu_pci_p
---truncated---
CVSS Score
7.8
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
hfsplus: don't query the device logical block size multiple times
Devices block sizes may change. One of these cases is a loop device by
using ioctl LOOP_SET_BLOCK_SIZE.
While this may cause other issues like IO being rejected, in the case of
hfsplus, it will allocate a block by using that size and potentially write
out-of-bounds when hfsplus_read_wrapper calls hfsplus_submit_bio and the
latter function reads a different io_size.
Using a new min_io_size initally set to sb_min_blocksize works for the
purposes of the original fix, since it will be set to the max between
HFSPLUS_SECTOR_SIZE and the first seen logical block size. We still use the
max between HFSPLUS_SECTOR_SIZE and min_io_size in case the latter is not
initialized.
Tested by mounting an hfsplus filesystem with loop block sizes 512, 1024
and 4096.
The produced KASAN report before the fix looks like this:
[ 419.944641] ==================================================================
[ 419.945655] BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0x659/0xa0a
[ 419.946703] Read of size 2 at addr ffff88800721fc00 by task repro/10678
[ 419.947612]
[ 419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro Not tainted 6.12.0-rc5-00008-gdf56e0f2f3ca #84
[ 419.949007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
[ 419.950035] Call Trace:
[ 419.950384] <TASK>
[ 419.950676] dump_stack_lvl+0x57/0x78
[ 419.951212] ? hfsplus_read_wrapper+0x659/0xa0a
[ 419.951830] print_report+0x14c/0x49e
[ 419.952361] ? __virt_addr_valid+0x267/0x278
[ 419.952979] ? kmem_cache_debug_flags+0xc/0x1d
[ 419.953561] ? hfsplus_read_wrapper+0x659/0xa0a
[ 419.954231] kasan_report+0x89/0xb0
[ 419.954748] ? hfsplus_read_wrapper+0x659/0xa0a
[ 419.955367] hfsplus_read_wrapper+0x659/0xa0a
[ 419.955948] ? __pfx_hfsplus_read_wrapper+0x10/0x10
[ 419.956618] ? do_raw_spin_unlock+0x59/0x1a9
[ 419.957214] ? _raw_spin_unlock+0x1a/0x2e
[ 419.957772] hfsplus_fill_super+0x348/0x1590
[ 419.958355] ? hlock_class+0x4c/0x109
[ 419.958867] ? __pfx_hfsplus_fill_super+0x10/0x10
[ 419.959499] ? __pfx_string+0x10/0x10
[ 419.960006] ? lock_acquire+0x3e2/0x454
[ 419.960532] ? bdev_name.constprop.0+0xce/0x243
[ 419.961129] ? __pfx_bdev_name.constprop.0+0x10/0x10
[ 419.961799] ? pointer+0x3f0/0x62f
[ 419.962277] ? __pfx_pointer+0x10/0x10
[ 419.962761] ? vsnprintf+0x6c4/0xfba
[ 419.963178] ? __pfx_vsnprintf+0x10/0x10
[ 419.963621] ? setup_bdev_super+0x376/0x3b3
[ 419.964029] ? snprintf+0x9d/0xd2
[ 419.964344] ? __pfx_snprintf+0x10/0x10
[ 419.964675] ? lock_acquired+0x45c/0x5e9
[ 419.965016] ? set_blocksize+0x139/0x1c1
[ 419.965381] ? sb_set_blocksize+0x6d/0xae
[ 419.965742] ? __pfx_hfsplus_fill_super+0x10/0x10
[ 419.966179] mount_bdev+0x12f/0x1bf
[ 419.966512] ? __pfx_mount_bdev+0x10/0x10
[ 419.966886] ? vfs_parse_fs_string+0xce/0x111
[ 419.967293] ? __pfx_vfs_parse_fs_string+0x10/0x10
[ 419.967702] ? __pfx_hfsplus_mount+0x10/0x10
[ 419.968073] legacy_get_tree+0x104/0x178
[ 419.968414] vfs_get_tree+0x86/0x296
[ 419.968751] path_mount+0xba3/0xd0b
[ 419.969157] ? __pfx_path_mount+0x10/0x10
[ 419.969594] ? kmem_cache_free+0x1e2/0x260
[ 419.970311] do_mount+0x99/0xe0
[ 419.970630] ? __pfx_do_mount+0x10/0x10
[ 419.971008] __do_sys_mount+0x199/0x1c9
[ 419.971397] do_syscall_64+0xd0/0x135
[ 419.971761] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 419.972233] RIP: 0033:0x7c3cb812972e
[ 419.972564] Code: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01 48
[ 419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
[ 419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e
[ 419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI:
---truncated---
CVSS Score
7.8
EPSS Score
0.001
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_config_scan()
Replace one-element array with a flexible-array member in `struct
mwifiex_ie_types_wildcard_ssid_params` to fix the following warning
on a MT8173 Chromebook (mt8173-elm-hana):
[ 356.775250] ------------[ cut here ]------------
[ 356.784543] memcpy: detected field-spanning write (size 6) of single field "wildcard_ssid_tlv->ssid" at drivers/net/wireless/marvell/mwifiex/scan.c:904 (size 1)
[ 356.813403] WARNING: CPU: 3 PID: 742 at drivers/net/wireless/marvell/mwifiex/scan.c:904 mwifiex_scan_networks+0x4fc/0xf28 [mwifiex]
The "(size 6)" above is exactly the length of the SSID of the network
this device was connected to. The source of the warning looks like:
ssid_len = user_scan_in->ssid_list[i].ssid_len;
[...]
memcpy(wildcard_ssid_tlv->ssid,
user_scan_in->ssid_list[i].ssid, ssid_len);
There is a #define WILDCARD_SSID_TLV_MAX_SIZE that uses sizeof() on this
struct, but it already didn't account for the size of the one-element
array, so it doesn't need to be changed.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
ALSA: 6fire: Release resources at card release
The current 6fire code tries to release the resources right after the
call of usb6fire_chip_abort(). But at this moment, the card object
might be still in use (as we're calling snd_card_free_when_closed()).
For avoid potential UAFs, move the release of resources to the card's
private_free instead of the manual call of usb6fire_chip_destroy() at
the USB disconnect callback.
CVSS Score
7.8
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
ALSA: caiaq: Use snd_card_free_when_closed() at disconnection
The USB disconnect callback is supposed to be short and not too-long
waiting. OTOH, the current code uses snd_card_free() at
disconnection, but this waits for the close of all used fds, hence it
can take long. It eventually blocks the upper layer USB ioctls, which
may trigger a soft lockup.
An easy workaround is to replace snd_card_free() with
snd_card_free_when_closed(). This variant returns immediately while
the release of resources is done asynchronously by the card device
release at the last close.
This patch also splits the code to the disconnect and the free phases;
the former is called immediately at the USB disconnect callback while
the latter is called from the card destructor.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
ALSA: us122l: Use snd_card_free_when_closed() at disconnection
The USB disconnect callback is supposed to be short and not too-long
waiting. OTOH, the current code uses snd_card_free() at
disconnection, but this waits for the close of all used fds, hence it
can take long. It eventually blocks the upper layer USB ioctls, which
may trigger a soft lockup.
An easy workaround is to replace snd_card_free() with
snd_card_free_when_closed(). This variant returns immediately while
the release of resources is done asynchronously by the card device
release at the last close.
The loop of us122l->mmap_count check is dropped as well. The check is
useless for the asynchronous operation with *_when_closed().
CVSS Score
5.5
EPSS Score
0.0
Published
2024-12-27
In the Linux kernel, the following vulnerability has been resolved:
ALSA: usx2y: Use snd_card_free_when_closed() at disconnection
The USB disconnect callback is supposed to be short and not too-long
waiting. OTOH, the current code uses snd_card_free() at
disconnection, but this waits for the close of all used fds, hence it
can take long. It eventually blocks the upper layer USB ioctls, which
may trigger a soft lockup.
An easy workaround is to replace snd_card_free() with
snd_card_free_when_closed(). This variant returns immediately while
the release of resources is done asynchronously by the card device
release at the last close.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-12-27