Date
July 24, 2025, 4:41 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.471140] ================================================================== [ 32.471242] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 32.471333] Read of size 16 at addr fff00000c86834c0 by task kunit_try_catch/199 [ 32.471704] [ 32.471856] CPU: 0 UID: 0 PID: 199 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250724 #1 PREEMPT [ 32.471945] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.471972] Hardware name: linux,dummy-virt (DT) [ 32.472004] Call trace: [ 32.472693] show_stack+0x20/0x38 (C) [ 32.473260] dump_stack_lvl+0x8c/0xd0 [ 32.473429] print_report+0x118/0x5e8 [ 32.473476] kasan_report+0xdc/0x128 [ 32.473806] __asan_report_load16_noabort+0x20/0x30 [ 32.474007] kmalloc_uaf_16+0x3bc/0x438 [ 32.474662] kunit_try_run_case+0x170/0x3f0 [ 32.475041] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.475176] kthread+0x328/0x630 [ 32.475463] ret_from_fork+0x10/0x20 [ 32.475604] [ 32.475664] Allocated by task 199: [ 32.475843] kasan_save_stack+0x3c/0x68 [ 32.476106] kasan_save_track+0x20/0x40 [ 32.476346] kasan_save_alloc_info+0x40/0x58 [ 32.476582] __kasan_kmalloc+0xd4/0xd8 [ 32.476840] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.476888] kmalloc_uaf_16+0x140/0x438 [ 32.476924] kunit_try_run_case+0x170/0x3f0 [ 32.476960] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.477001] kthread+0x328/0x630 [ 32.477033] ret_from_fork+0x10/0x20 [ 32.477067] [ 32.478003] Freed by task 199: [ 32.478406] kasan_save_stack+0x3c/0x68 [ 32.478471] kasan_save_track+0x20/0x40 [ 32.478505] kasan_save_free_info+0x4c/0x78 [ 32.478541] __kasan_slab_free+0x6c/0x98 [ 32.478575] kfree+0x214/0x3c8 [ 32.479229] kmalloc_uaf_16+0x190/0x438 [ 32.479440] kunit_try_run_case+0x170/0x3f0 [ 32.479549] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.479743] kthread+0x328/0x630 [ 32.479798] ret_from_fork+0x10/0x20 [ 32.480370] [ 32.480494] The buggy address belongs to the object at fff00000c86834c0 [ 32.480494] which belongs to the cache kmalloc-16 of size 16 [ 32.480555] The buggy address is located 0 bytes inside of [ 32.480555] freed 16-byte region [fff00000c86834c0, fff00000c86834d0) [ 32.480617] [ 32.481095] The buggy address belongs to the physical page: [ 32.481336] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x108683 [ 32.481482] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.481595] page_type: f5(slab) [ 32.482303] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 32.482475] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 32.482627] page dumped because: kasan: bad access detected [ 32.483261] [ 32.483484] Memory state around the buggy address: [ 32.483650] fff00000c8683380: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.484051] fff00000c8683400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.484177] >fff00000c8683480: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 32.484250] ^ [ 32.484506] fff00000c8683500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.484831] fff00000c8683580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.484995] ==================================================================
[ 26.880352] ================================================================== [ 26.881331] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 26.881745] Read of size 16 at addr ffff888104625b60 by task kunit_try_catch/216 [ 26.882359] [ 26.882471] CPU: 1 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) [ 26.882522] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 26.882535] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.882556] Call Trace: [ 26.882568] <TASK> [ 26.882596] dump_stack_lvl+0x73/0xb0 [ 26.882627] print_report+0xd1/0x640 [ 26.882650] ? __virt_addr_valid+0x1db/0x2d0 [ 26.882674] ? kmalloc_uaf_16+0x47b/0x4c0 [ 26.882695] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.882720] ? kmalloc_uaf_16+0x47b/0x4c0 [ 26.882740] kasan_report+0x141/0x180 [ 26.882761] ? kmalloc_uaf_16+0x47b/0x4c0 [ 26.882846] __asan_report_load16_noabort+0x18/0x20 [ 26.882877] kmalloc_uaf_16+0x47b/0x4c0 [ 26.882899] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 26.882961] ? __schedule+0x10da/0x2b60 [ 26.882988] ? __pfx_read_tsc+0x10/0x10 [ 26.883009] ? ktime_get_ts64+0x86/0x230 [ 26.883046] kunit_try_run_case+0x1a5/0x480 [ 26.883072] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.883093] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.883130] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.883154] ? __kthread_parkme+0x82/0x180 [ 26.883174] ? preempt_count_sub+0x50/0x80 [ 26.883208] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.883231] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.883259] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.883282] kthread+0x337/0x6f0 [ 26.883303] ? trace_preempt_on+0x20/0xc0 [ 26.883327] ? __pfx_kthread+0x10/0x10 [ 26.883347] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.883369] ? calculate_sigpending+0x7b/0xa0 [ 26.883392] ? __pfx_kthread+0x10/0x10 [ 26.883413] ret_from_fork+0x116/0x1d0 [ 26.883432] ? __pfx_kthread+0x10/0x10 [ 26.883451] ret_from_fork_asm+0x1a/0x30 [ 26.883482] </TASK> [ 26.883493] [ 26.891641] Allocated by task 216: [ 26.891864] kasan_save_stack+0x45/0x70 [ 26.892085] kasan_save_track+0x18/0x40 [ 26.892494] kasan_save_alloc_info+0x3b/0x50 [ 26.892800] __kasan_kmalloc+0xb7/0xc0 [ 26.893108] __kmalloc_cache_noprof+0x189/0x420 [ 26.893356] kmalloc_uaf_16+0x15b/0x4c0 [ 26.893548] kunit_try_run_case+0x1a5/0x480 [ 26.893799] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.894177] kthread+0x337/0x6f0 [ 26.894362] ret_from_fork+0x116/0x1d0 [ 26.894566] ret_from_fork_asm+0x1a/0x30 [ 26.894746] [ 26.894930] Freed by task 216: [ 26.895158] kasan_save_stack+0x45/0x70 [ 26.895304] kasan_save_track+0x18/0x40 [ 26.895536] kasan_save_free_info+0x3f/0x60 [ 26.895777] __kasan_slab_free+0x56/0x70 [ 26.896160] kfree+0x222/0x3f0 [ 26.896380] kmalloc_uaf_16+0x1d6/0x4c0 [ 26.896583] kunit_try_run_case+0x1a5/0x480 [ 26.896793] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.897110] kthread+0x337/0x6f0 [ 26.897283] ret_from_fork+0x116/0x1d0 [ 26.897479] ret_from_fork_asm+0x1a/0x30 [ 26.897673] [ 26.897797] The buggy address belongs to the object at ffff888104625b60 [ 26.897797] which belongs to the cache kmalloc-16 of size 16 [ 26.898879] The buggy address is located 0 bytes inside of [ 26.898879] freed 16-byte region [ffff888104625b60, ffff888104625b70) [ 26.899539] [ 26.899620] The buggy address belongs to the physical page: [ 26.899790] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104625 [ 26.900178] flags: 0x200000000000000(node=0|zone=2) [ 26.900883] page_type: f5(slab) [ 26.901040] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 26.901259] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 26.901635] page dumped because: kasan: bad access detected [ 26.902071] [ 26.902194] Memory state around the buggy address: [ 26.902422] ffff888104625a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.902785] ffff888104625a80: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.903176] >ffff888104625b00: 00 06 fc fc 00 06 fc fc 00 06 fc fc fa fb fc fc [ 26.903510] ^ [ 26.903874] ffff888104625b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.904360] ffff888104625c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.904742] ==================================================================