Date
June 2, 2025, 2:11 p.m.
| Environment | |
|---|---|
| e850-96 | |
| qemu-x86_64 |
[ 38.965084] ================================================================== [ 38.972116] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 38.978101] Read of size 1 at addr ffff00080394fc10 by task kunit_try_catch/306 [ 38.985393] [ 38.986876] CPU: 7 UID: 0 PID: 306 Comm: kunit_try_catch Tainted: G B N 6.15.1-rc1 #1 PREEMPT [ 38.986931] Tainted: [B]=BAD_PAGE, [N]=TEST [ 38.986948] Hardware name: WinLink E850-96 board (DT) [ 38.986970] Call trace: [ 38.986982] show_stack+0x20/0x38 (C) [ 38.987014] dump_stack_lvl+0x8c/0xd0 [ 38.987045] print_report+0x118/0x608 [ 38.987077] kasan_report+0xdc/0x128 [ 38.987104] __asan_report_load1_noabort+0x20/0x30 [ 38.987138] strnlen+0x80/0x88 [ 38.987163] kasan_strings+0x478/0xb00 [ 38.987198] kunit_try_run_case+0x170/0x3f0 [ 38.987230] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 38.987269] kthread+0x328/0x630 [ 38.987299] ret_from_fork+0x10/0x20 [ 38.987334] [ 39.052319] Allocated by task 306: [ 39.055704] kasan_save_stack+0x3c/0x68 [ 39.059524] kasan_save_track+0x20/0x40 [ 39.063343] kasan_save_alloc_info+0x40/0x58 [ 39.067596] __kasan_kmalloc+0xd4/0xd8 [ 39.071329] __kmalloc_cache_noprof+0x16c/0x3c0 [ 39.075843] kasan_strings+0xc8/0xb00 [ 39.079489] kunit_try_run_case+0x170/0x3f0 [ 39.083655] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 39.089124] kthread+0x328/0x630 [ 39.092335] ret_from_fork+0x10/0x20 [ 39.095895] [ 39.097370] Freed by task 306: [ 39.100410] kasan_save_stack+0x3c/0x68 [ 39.104228] kasan_save_track+0x20/0x40 [ 39.108047] kasan_save_free_info+0x4c/0x78 [ 39.112214] __kasan_slab_free+0x6c/0x98 [ 39.116120] kfree+0x214/0x3c8 [ 39.119158] kasan_strings+0x24c/0xb00 [ 39.122891] kunit_try_run_case+0x170/0x3f0 [ 39.127057] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 39.132526] kthread+0x328/0x630 [ 39.135738] ret_from_fork+0x10/0x20 [ 39.139296] [ 39.140772] The buggy address belongs to the object at ffff00080394fc00 [ 39.140772] which belongs to the cache kmalloc-32 of size 32 [ 39.153099] The buggy address is located 16 bytes inside of [ 39.153099] freed 32-byte region [ffff00080394fc00, ffff00080394fc20) [ 39.165164] [ 39.166643] The buggy address belongs to the physical page: [ 39.172196] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x88394f [ 39.180182] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 39.186691] page_type: f5(slab) [ 39.189826] raw: 0bfffe0000000000 ffff000800002780 dead000000000122 0000000000000000 [ 39.197549] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 39.205268] page dumped because: kasan: bad access detected [ 39.210823] [ 39.212299] Memory state around the buggy address: [ 39.217080] ffff00080394fb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 39.224282] ffff00080394fb80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 39.231486] >ffff00080394fc00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 39.238688] ^ [ 39.242423] ffff00080394fc80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 39.249628] ffff00080394fd00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 39.256830] ==================================================================
[ 19.097606] ================================================================== [ 19.098046] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 19.098454] Read of size 1 at addr ffff888101e064d0 by task kunit_try_catch/280 [ 19.099045] [ 19.099279] CPU: 1 UID: 0 PID: 280 Comm: kunit_try_catch Tainted: G B N 6.15.1-rc1 #1 PREEMPT(voluntary) [ 19.099470] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.099501] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 19.099564] Call Trace: [ 19.099602] <TASK> [ 19.099666] dump_stack_lvl+0x73/0xb0 [ 19.099736] print_report+0xd1/0x650 [ 19.099798] ? __virt_addr_valid+0x1db/0x2d0 [ 19.099854] ? strnlen+0x73/0x80 [ 19.099935] ? kasan_complete_mode_report_info+0x64/0x200 [ 19.100012] ? strnlen+0x73/0x80 [ 19.100067] kasan_report+0x141/0x180 [ 19.100121] ? strnlen+0x73/0x80 [ 19.100277] __asan_report_load1_noabort+0x18/0x20 [ 19.100312] strnlen+0x73/0x80 [ 19.100336] kasan_strings+0x615/0xe80 [ 19.100358] ? trace_hardirqs_on+0x37/0xe0 [ 19.100386] ? __pfx_kasan_strings+0x10/0x10 [ 19.100409] ? finish_task_switch.isra.0+0x153/0x700 [ 19.100434] ? __switch_to+0x5d9/0xf60 [ 19.100457] ? dequeue_task_fair+0x166/0x4e0 [ 19.100484] ? __schedule+0x10cc/0x2b30 [ 19.100509] ? __pfx_read_tsc+0x10/0x10 [ 19.100530] ? ktime_get_ts64+0x86/0x230 [ 19.100559] kunit_try_run_case+0x1a5/0x480 [ 19.100586] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.100609] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 19.100635] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 19.100660] ? __kthread_parkme+0x82/0x180 [ 19.100683] ? preempt_count_sub+0x50/0x80 [ 19.100710] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.100735] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.100786] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 19.100813] kthread+0x337/0x6f0 [ 19.100834] ? trace_preempt_on+0x20/0xc0 [ 19.100858] ? __pfx_kthread+0x10/0x10 [ 19.100879] ? _raw_spin_unlock_irq+0x47/0x80 [ 19.100903] ? calculate_sigpending+0x7b/0xa0 [ 19.100927] ? __pfx_kthread+0x10/0x10 [ 19.100948] ret_from_fork+0x41/0x80 [ 19.100971] ? __pfx_kthread+0x10/0x10 [ 19.100992] ret_from_fork_asm+0x1a/0x30 [ 19.101028] </TASK> [ 19.101043] [ 19.114393] Allocated by task 280: [ 19.114856] kasan_save_stack+0x45/0x70 [ 19.115311] kasan_save_track+0x18/0x40 [ 19.115716] kasan_save_alloc_info+0x3b/0x50 [ 19.116015] __kasan_kmalloc+0xb7/0xc0 [ 19.116317] __kmalloc_cache_noprof+0x189/0x420 [ 19.116561] kasan_strings+0xc0/0xe80 [ 19.116772] kunit_try_run_case+0x1a5/0x480 [ 19.117011] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.117510] kthread+0x337/0x6f0 [ 19.117877] ret_from_fork+0x41/0x80 [ 19.118251] ret_from_fork_asm+0x1a/0x30 [ 19.118630] [ 19.118824] Freed by task 280: [ 19.119166] kasan_save_stack+0x45/0x70 [ 19.119464] kasan_save_track+0x18/0x40 [ 19.119762] kasan_save_free_info+0x3f/0x60 [ 19.120151] __kasan_slab_free+0x56/0x70 [ 19.120510] kfree+0x222/0x3f0 [ 19.120720] kasan_strings+0x2aa/0xe80 [ 19.120921] kunit_try_run_case+0x1a5/0x480 [ 19.121173] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.121425] kthread+0x337/0x6f0 [ 19.121710] ret_from_fork+0x41/0x80 [ 19.122050] ret_from_fork_asm+0x1a/0x30 [ 19.122460] [ 19.122661] The buggy address belongs to the object at ffff888101e064c0 [ 19.122661] which belongs to the cache kmalloc-32 of size 32 [ 19.123655] The buggy address is located 16 bytes inside of [ 19.123655] freed 32-byte region [ffff888101e064c0, ffff888101e064e0) [ 19.124554] [ 19.124741] The buggy address belongs to the physical page: [ 19.125166] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101e06 [ 19.125632] flags: 0x200000000000000(node=0|zone=2) [ 19.126061] page_type: f5(slab) [ 19.126422] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 19.127009] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.127420] page dumped because: kasan: bad access detected [ 19.127670] [ 19.127823] Memory state around the buggy address: [ 19.128268] ffff888101e06380: 00 00 00 04 fc fc fc fc fa fb fb fb fc fc fc fc [ 19.128828] ffff888101e06400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.129415] >ffff888101e06480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.129904] ^ [ 19.130226] ffff888101e06500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.130519] ffff888101e06580: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.131088] ==================================================================