Date
May 12, 2025, 6:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.919162] ================================================================== [ 18.920019] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 18.920683] Read of size 1 at addr fff00000c59b8548 by task kunit_try_catch/173 [ 18.921242] [ 18.921590] CPU: 1 UID: 0 PID: 173 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 18.921861] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.921936] Hardware name: linux,dummy-virt (DT) [ 18.922026] Call trace: [ 18.922104] show_stack+0x20/0x38 (C) [ 18.922230] dump_stack_lvl+0x8c/0xd0 [ 18.922357] print_report+0x118/0x608 [ 18.922456] kasan_report+0xdc/0x128 [ 18.922614] __asan_report_load1_noabort+0x20/0x30 [ 18.922754] kmalloc_uaf+0x300/0x338 [ 18.922858] kunit_try_run_case+0x170/0x3f0 [ 18.922960] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.923074] kthread+0x318/0x620 [ 18.923166] ret_from_fork+0x10/0x20 [ 18.923277] [ 18.928053] Allocated by task 173: [ 18.928498] kasan_save_stack+0x3c/0x68 [ 18.929035] kasan_save_track+0x20/0x40 [ 18.929473] kasan_save_alloc_info+0x40/0x58 [ 18.929949] __kasan_kmalloc+0xd4/0xd8 [ 18.930430] __kmalloc_cache_noprof+0x15c/0x3c0 [ 18.931026] kmalloc_uaf+0xb8/0x338 [ 18.931328] kunit_try_run_case+0x170/0x3f0 [ 18.931624] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.932300] kthread+0x318/0x620 [ 18.932793] ret_from_fork+0x10/0x20 [ 18.933285] [ 18.933538] Freed by task 173: [ 18.933962] kasan_save_stack+0x3c/0x68 [ 18.934443] kasan_save_track+0x20/0x40 [ 18.935010] kasan_save_free_info+0x4c/0x78 [ 18.935691] __kasan_slab_free+0x6c/0x98 [ 18.936208] kfree+0x214/0x3c8 [ 18.936686] kmalloc_uaf+0x11c/0x338 [ 18.937133] kunit_try_run_case+0x170/0x3f0 [ 18.937629] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.938277] kthread+0x318/0x620 [ 18.938948] ret_from_fork+0x10/0x20 [ 18.939392] [ 18.939757] The buggy address belongs to the object at fff00000c59b8540 [ 18.939757] which belongs to the cache kmalloc-16 of size 16 [ 18.940638] The buggy address is located 8 bytes inside of [ 18.940638] freed 16-byte region [fff00000c59b8540, fff00000c59b8550) [ 18.941456] [ 18.941809] The buggy address belongs to the physical page: [ 18.942521] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059b8 [ 18.943290] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.944126] page_type: f5(slab) [ 18.944646] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.945188] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.946048] page dumped because: kasan: bad access detected [ 18.946547] [ 18.946712] Memory state around the buggy address: [ 18.947269] fff00000c59b8400: fa fb fc fc 00 03 fc fc 00 03 fc fc 00 00 fc fc [ 18.947798] fff00000c59b8480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.948294] >fff00000c59b8500: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 18.948850] ^ [ 18.949338] fff00000c59b8580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.949875] fff00000c59b8600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.950409] ==================================================================
[ 12.695407] ================================================================== [ 12.695936] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x322/0x380 [ 12.696265] Read of size 1 at addr ffff888101b28028 by task kunit_try_catch/192 [ 12.696523] [ 12.696636] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 12.696685] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.696697] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.696734] Call Trace: [ 12.696749] <TASK> [ 12.696771] dump_stack_lvl+0x73/0xb0 [ 12.696800] print_report+0xd1/0x650 [ 12.696823] ? __virt_addr_valid+0x1db/0x2d0 [ 12.696869] ? kmalloc_uaf+0x322/0x380 [ 12.696889] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.696934] ? kmalloc_uaf+0x322/0x380 [ 12.696954] kasan_report+0x140/0x180 [ 12.696975] ? kmalloc_uaf+0x322/0x380 [ 12.696998] __asan_report_load1_noabort+0x18/0x20 [ 12.697021] kmalloc_uaf+0x322/0x380 [ 12.697040] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.697060] ? __schedule+0xce8/0x2840 [ 12.697097] ? __pfx_read_tsc+0x10/0x10 [ 12.697119] ? ktime_get_ts64+0x86/0x230 [ 12.697145] kunit_try_run_case+0x1a6/0x480 [ 12.697169] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.697193] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.697215] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.697239] ? __kthread_parkme+0x82/0x160 [ 12.697262] ? preempt_count_sub+0x50/0x80 [ 12.697288] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.697311] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.697336] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.697361] kthread+0x324/0x6e0 [ 12.697383] ? trace_preempt_on+0x20/0xc0 [ 12.697407] ? __pfx_kthread+0x10/0x10 [ 12.697429] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.697452] ? calculate_sigpending+0x7b/0xa0 [ 12.697473] ? __pfx_kthread+0x10/0x10 [ 12.697495] ret_from_fork+0x41/0x80 [ 12.697514] ? __pfx_kthread+0x10/0x10 [ 12.697536] ret_from_fork_asm+0x1a/0x30 [ 12.697568] </TASK> [ 12.697579] [ 12.705145] Allocated by task 192: [ 12.705367] kasan_save_stack+0x45/0x70 [ 12.705591] kasan_save_track+0x18/0x40 [ 12.705759] kasan_save_alloc_info+0x3b/0x50 [ 12.705925] __kasan_kmalloc+0xb7/0xc0 [ 12.706298] __kmalloc_cache_noprof+0x18a/0x420 [ 12.706531] kmalloc_uaf+0xab/0x380 [ 12.706717] kunit_try_run_case+0x1a6/0x480 [ 12.706924] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.707223] kthread+0x324/0x6e0 [ 12.707405] ret_from_fork+0x41/0x80 [ 12.707555] ret_from_fork_asm+0x1a/0x30 [ 12.707728] [ 12.707828] Freed by task 192: [ 12.707978] kasan_save_stack+0x45/0x70 [ 12.708180] kasan_save_track+0x18/0x40 [ 12.708789] kasan_save_free_info+0x3f/0x60 [ 12.709174] __kasan_slab_free+0x56/0x70 [ 12.709317] kfree+0x224/0x3f0 [ 12.709435] kmalloc_uaf+0x12d/0x380 [ 12.709564] kunit_try_run_case+0x1a6/0x480 [ 12.709778] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.710069] kthread+0x324/0x6e0 [ 12.710246] ret_from_fork+0x41/0x80 [ 12.710431] ret_from_fork_asm+0x1a/0x30 [ 12.710622] [ 12.710721] The buggy address belongs to the object at ffff888101b28020 [ 12.710721] which belongs to the cache kmalloc-16 of size 16 [ 12.711334] The buggy address is located 8 bytes inside of [ 12.711334] freed 16-byte region [ffff888101b28020, ffff888101b28030) [ 12.711788] [ 12.711880] The buggy address belongs to the physical page: [ 12.712192] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b28 [ 12.712523] flags: 0x200000000000000(node=0|zone=2) [ 12.712749] page_type: f5(slab) [ 12.712887] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.713154] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.713610] page dumped because: kasan: bad access detected [ 12.713882] [ 12.713968] Memory state around the buggy address: [ 12.714297] ffff888101b27f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.714556] ffff888101b27f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.714786] >ffff888101b28000: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.715111] ^ [ 12.715455] ffff888101b28080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.715782] ffff888101b28100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.716023] ==================================================================