Date
May 12, 2025, 6:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.834207] ================================================================== [ 20.834719] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 20.836304] Read of size 1 at addr fff00000c66e72d0 by task kunit_try_catch/248 [ 20.836866] [ 20.837025] CPU: 1 UID: 0 PID: 248 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 20.837124] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.837158] Hardware name: linux,dummy-virt (DT) [ 20.837196] Call trace: [ 20.837224] show_stack+0x20/0x38 (C) [ 20.837289] dump_stack_lvl+0x8c/0xd0 [ 20.837343] print_report+0x118/0x608 [ 20.837400] kasan_report+0xdc/0x128 [ 20.837453] __asan_report_load1_noabort+0x20/0x30 [ 20.837507] strnlen+0x80/0x88 [ 20.837556] kasan_strings+0x364/0x8d8 [ 20.837607] kunit_try_run_case+0x170/0x3f0 [ 20.837661] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.837718] kthread+0x318/0x620 [ 20.837795] ret_from_fork+0x10/0x20 [ 20.837852] [ 20.841698] Allocated by task 248: [ 20.842018] kasan_save_stack+0x3c/0x68 [ 20.842295] kasan_save_track+0x20/0x40 [ 20.842658] kasan_save_alloc_info+0x40/0x58 [ 20.843028] __kasan_kmalloc+0xd4/0xd8 [ 20.843203] __kmalloc_cache_noprof+0x15c/0x3c0 [ 20.843573] kasan_strings+0xb0/0x8d8 [ 20.843783] kunit_try_run_case+0x170/0x3f0 [ 20.844044] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.844304] kthread+0x318/0x620 [ 20.844534] ret_from_fork+0x10/0x20 [ 20.844723] [ 20.844998] Freed by task 248: [ 20.845297] kasan_save_stack+0x3c/0x68 [ 20.845516] kasan_save_track+0x20/0x40 [ 20.845782] kasan_save_free_info+0x4c/0x78 [ 20.845955] __kasan_slab_free+0x6c/0x98 [ 20.846135] kfree+0x214/0x3c8 [ 20.846366] kasan_strings+0x124/0x8d8 [ 20.846858] kunit_try_run_case+0x170/0x3f0 [ 20.847332] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.847696] kthread+0x318/0x620 [ 20.847869] ret_from_fork+0x10/0x20 [ 20.848232] [ 20.848427] The buggy address belongs to the object at fff00000c66e72c0 [ 20.848427] which belongs to the cache kmalloc-32 of size 32 [ 20.849106] The buggy address is located 16 bytes inside of [ 20.849106] freed 32-byte region [fff00000c66e72c0, fff00000c66e72e0) [ 20.849596] [ 20.849811] The buggy address belongs to the physical page: [ 20.850139] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1066e7 [ 20.850816] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.851389] page_type: f5(slab) [ 20.851632] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.852049] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.852458] page dumped because: kasan: bad access detected [ 20.852775] [ 20.852976] Memory state around the buggy address: [ 20.853204] fff00000c66e7180: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.853678] fff00000c66e7200: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 20.854236] >fff00000c66e7280: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.854983] ^ [ 20.855268] fff00000c66e7300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.855514] fff00000c66e7380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.855733] ==================================================================
[ 14.386432] ================================================================== [ 14.386813] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 14.387764] Read of size 1 at addr ffff888101b3b550 by task kunit_try_catch/267 [ 14.388076] [ 14.388208] CPU: 1 UID: 0 PID: 267 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 14.388255] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.388267] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.388290] Call Trace: [ 14.388323] <TASK> [ 14.388344] dump_stack_lvl+0x73/0xb0 [ 14.388373] print_report+0xd1/0x650 [ 14.388395] ? __virt_addr_valid+0x1db/0x2d0 [ 14.388417] ? strnlen+0x73/0x80 [ 14.388438] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.388463] ? strnlen+0x73/0x80 [ 14.388483] kasan_report+0x140/0x180 [ 14.388504] ? strnlen+0x73/0x80 [ 14.388528] __asan_report_load1_noabort+0x18/0x20 [ 14.388550] strnlen+0x73/0x80 [ 14.388571] kasan_strings+0x4c3/0xb60 [ 14.388591] ? __pfx_kasan_strings+0x10/0x10 [ 14.388614] ? ktime_get_ts64+0xfb/0x230 [ 14.388637] ? ktime_get_ts64+0x86/0x230 [ 14.388660] kunit_try_run_case+0x1a6/0x480 [ 14.388684] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.388704] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 14.388726] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.388751] ? __kthread_parkme+0x82/0x160 [ 14.388773] ? preempt_count_sub+0x50/0x80 [ 14.388797] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.388819] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.388876] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.388903] kthread+0x324/0x6e0 [ 14.388924] ? trace_preempt_on+0x20/0xc0 [ 14.388964] ? __pfx_kthread+0x10/0x10 [ 14.388986] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.389009] ? calculate_sigpending+0x7b/0xa0 [ 14.389048] ? __pfx_kthread+0x10/0x10 [ 14.389070] ret_from_fork+0x41/0x80 [ 14.389089] ? __pfx_kthread+0x10/0x10 [ 14.389111] ret_from_fork_asm+0x1a/0x30 [ 14.389142] </TASK> [ 14.389153] [ 14.396008] Allocated by task 267: [ 14.396234] kasan_save_stack+0x45/0x70 [ 14.396444] kasan_save_track+0x18/0x40 [ 14.396618] kasan_save_alloc_info+0x3b/0x50 [ 14.396853] __kasan_kmalloc+0xb7/0xc0 [ 14.397001] __kmalloc_cache_noprof+0x18a/0x420 [ 14.397245] kasan_strings+0xb9/0xb60 [ 14.397440] kunit_try_run_case+0x1a6/0x480 [ 14.397613] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.397929] kthread+0x324/0x6e0 [ 14.398238] ret_from_fork+0x41/0x80 [ 14.398431] ret_from_fork_asm+0x1a/0x30 [ 14.398625] [ 14.398713] Freed by task 267: [ 14.398873] kasan_save_stack+0x45/0x70 [ 14.399024] kasan_save_track+0x18/0x40 [ 14.399262] kasan_save_free_info+0x3f/0x60 [ 14.399509] __kasan_slab_free+0x56/0x70 [ 14.399644] kfree+0x224/0x3f0 [ 14.399761] kasan_strings+0x13c/0xb60 [ 14.399971] kunit_try_run_case+0x1a6/0x480 [ 14.400406] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.400682] kthread+0x324/0x6e0 [ 14.400898] ret_from_fork+0x41/0x80 [ 14.401029] ret_from_fork_asm+0x1a/0x30 [ 14.401249] [ 14.401342] The buggy address belongs to the object at ffff888101b3b540 [ 14.401342] which belongs to the cache kmalloc-32 of size 32 [ 14.401805] The buggy address is located 16 bytes inside of [ 14.401805] freed 32-byte region [ffff888101b3b540, ffff888101b3b560) [ 14.402214] [ 14.402332] The buggy address belongs to the physical page: [ 14.402609] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b3b [ 14.402993] flags: 0x200000000000000(node=0|zone=2) [ 14.403253] page_type: f5(slab) [ 14.403448] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.403702] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.404019] page dumped because: kasan: bad access detected [ 14.404366] [ 14.404548] Memory state around the buggy address: [ 14.404771] ffff888101b3b400: 00 00 00 04 fc fc fc fc fa fb fb fb fc fc fc fc [ 14.405083] ffff888101b3b480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.405367] >ffff888101b3b500: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.405663] ^ [ 14.405874] ffff888101b3b580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.406200] ffff888101b3b600: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.406514] ==================================================================