Date
July 3, 2025, 3:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.548924] ================================================================== [ 15.548998] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 15.549495] Read of size 16 at addr fff00000c55f0900 by task kunit_try_catch/171 [ 15.549565] [ 15.549929] CPU: 1 UID: 0 PID: 171 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc1 #1 PREEMPT [ 15.550086] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.550140] Hardware name: linux,dummy-virt (DT) [ 15.550643] Call trace: [ 15.550750] show_stack+0x20/0x38 (C) [ 15.550821] dump_stack_lvl+0x8c/0xd0 [ 15.550979] print_report+0x118/0x608 [ 15.551400] kasan_report+0xdc/0x128 [ 15.551479] __asan_report_load16_noabort+0x20/0x30 [ 15.551593] kmalloc_uaf_16+0x3bc/0x438 [ 15.551827] kunit_try_run_case+0x170/0x3f0 [ 15.552245] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.552339] kthread+0x328/0x630 [ 15.552479] ret_from_fork+0x10/0x20 [ 15.553052] [ 15.553112] Allocated by task 171: [ 15.553209] kasan_save_stack+0x3c/0x68 [ 15.553326] kasan_save_track+0x20/0x40 [ 15.553448] kasan_save_alloc_info+0x40/0x58 [ 15.553650] __kasan_kmalloc+0xd4/0xd8 [ 15.553873] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.554195] kmalloc_uaf_16+0x140/0x438 [ 15.554358] kunit_try_run_case+0x170/0x3f0 [ 15.554415] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.554668] kthread+0x328/0x630 [ 15.554729] ret_from_fork+0x10/0x20 [ 15.555108] [ 15.555224] Freed by task 171: [ 15.555319] kasan_save_stack+0x3c/0x68 [ 15.555417] kasan_save_track+0x20/0x40 [ 15.555717] kasan_save_free_info+0x4c/0x78 [ 15.555965] __kasan_slab_free+0x6c/0x98 [ 15.556117] kfree+0x214/0x3c8 [ 15.556293] kmalloc_uaf_16+0x190/0x438 [ 15.556334] kunit_try_run_case+0x170/0x3f0 [ 15.556659] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.556864] kthread+0x328/0x630 [ 15.557437] ret_from_fork+0x10/0x20 [ 15.557697] [ 15.557887] The buggy address belongs to the object at fff00000c55f0900 [ 15.557887] which belongs to the cache kmalloc-16 of size 16 [ 15.557970] The buggy address is located 0 bytes inside of [ 15.557970] freed 16-byte region [fff00000c55f0900, fff00000c55f0910) [ 15.558231] [ 15.558263] The buggy address belongs to the physical page: [ 15.558295] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1055f0 [ 15.558351] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.558399] page_type: f5(slab) [ 15.558445] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.558990] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.559063] page dumped because: kasan: bad access detected [ 15.559188] [ 15.559370] Memory state around the buggy address: [ 15.559561] fff00000c55f0800: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.559762] fff00000c55f0880: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 15.559840] >fff00000c55f0900: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.560053] ^ [ 15.560223] fff00000c55f0980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.560274] fff00000c55f0a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.560354] ==================================================================
[ 11.214423] ================================================================== [ 11.214881] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 11.215192] Read of size 16 at addr ffff888102224100 by task kunit_try_catch/187 [ 11.215641] [ 11.215837] CPU: 0 UID: 0 PID: 187 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc1 #1 PREEMPT(voluntary) [ 11.215885] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.215897] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.215930] Call Trace: [ 11.215942] <TASK> [ 11.215960] dump_stack_lvl+0x73/0xb0 [ 11.215990] print_report+0xd1/0x650 [ 11.216025] ? __virt_addr_valid+0x1db/0x2d0 [ 11.216049] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.216070] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.216101] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.216123] kasan_report+0x141/0x180 [ 11.216146] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.216183] __asan_report_load16_noabort+0x18/0x20 [ 11.216205] kmalloc_uaf_16+0x47b/0x4c0 [ 11.216226] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.216257] ? __schedule+0x10cc/0x2b60 [ 11.216338] ? __pfx_read_tsc+0x10/0x10 [ 11.216361] ? ktime_get_ts64+0x86/0x230 [ 11.216389] kunit_try_run_case+0x1a5/0x480 [ 11.216415] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.216437] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.216462] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.216485] ? __kthread_parkme+0x82/0x180 [ 11.216508] ? preempt_count_sub+0x50/0x80 [ 11.216546] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.216570] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.216593] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.216628] kthread+0x337/0x6f0 [ 11.216644] ? trace_preempt_on+0x20/0xc0 [ 11.216669] ? __pfx_kthread+0x10/0x10 [ 11.216696] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.216718] ? calculate_sigpending+0x7b/0xa0 [ 11.216740] ? __pfx_kthread+0x10/0x10 [ 11.216759] ret_from_fork+0x41/0x80 [ 11.216779] ? __pfx_kthread+0x10/0x10 [ 11.216797] ret_from_fork_asm+0x1a/0x30 [ 11.216828] </TASK> [ 11.216839] [ 11.224542] Allocated by task 187: [ 11.224797] kasan_save_stack+0x45/0x70 [ 11.225032] kasan_save_track+0x18/0x40 [ 11.225264] kasan_save_alloc_info+0x3b/0x50 [ 11.225531] __kasan_kmalloc+0xb7/0xc0 [ 11.225917] __kmalloc_cache_noprof+0x189/0x420 [ 11.226139] kmalloc_uaf_16+0x15b/0x4c0 [ 11.226451] kunit_try_run_case+0x1a5/0x480 [ 11.226671] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.226961] kthread+0x337/0x6f0 [ 11.227132] ret_from_fork+0x41/0x80 [ 11.227399] ret_from_fork_asm+0x1a/0x30 [ 11.227603] [ 11.227697] Freed by task 187: [ 11.227810] kasan_save_stack+0x45/0x70 [ 11.228078] kasan_save_track+0x18/0x40 [ 11.228220] kasan_save_free_info+0x3f/0x60 [ 11.228709] __kasan_slab_free+0x56/0x70 [ 11.228911] kfree+0x222/0x3f0 [ 11.229091] kmalloc_uaf_16+0x1d6/0x4c0 [ 11.229282] kunit_try_run_case+0x1a5/0x480 [ 11.229428] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.229620] kthread+0x337/0x6f0 [ 11.229764] ret_from_fork+0x41/0x80 [ 11.229949] ret_from_fork_asm+0x1a/0x30 [ 11.230393] [ 11.230495] The buggy address belongs to the object at ffff888102224100 [ 11.230495] which belongs to the cache kmalloc-16 of size 16 [ 11.231048] The buggy address is located 0 bytes inside of [ 11.231048] freed 16-byte region [ffff888102224100, ffff888102224110) [ 11.231913] [ 11.232034] The buggy address belongs to the physical page: [ 11.232365] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102224 [ 11.232779] flags: 0x200000000000000(node=0|zone=2) [ 11.233018] page_type: f5(slab) [ 11.233209] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.233665] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.233997] page dumped because: kasan: bad access detected [ 11.234258] [ 11.234559] Memory state around the buggy address: [ 11.234832] ffff888102224000: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 11.235158] ffff888102224080: fa fb fc fc 00 05 fc fc fa fb fc fc 00 00 fc fc [ 11.235522] >ffff888102224100: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.235927] ^ [ 11.236051] ffff888102224180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.236476] ffff888102224200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.236735] ==================================================================