Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.149863] ================================================================== [ 19.149922] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 19.149973] Read of size 1 at addr fff00000c7832b50 by task kunit_try_catch/259 [ 19.150192] [ 19.150228] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.150543] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.150651] Hardware name: linux,dummy-virt (DT) [ 19.150686] Call trace: [ 19.150791] show_stack+0x20/0x38 (C) [ 19.150843] dump_stack_lvl+0x8c/0xd0 [ 19.151088] print_report+0x118/0x608 [ 19.151172] kasan_report+0xdc/0x128 [ 19.151307] __asan_report_load1_noabort+0x20/0x30 [ 19.151466] kasan_strings+0x95c/0xb00 [ 19.151533] kunit_try_run_case+0x170/0x3f0 [ 19.151584] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.151639] kthread+0x328/0x630 [ 19.151744] ret_from_fork+0x10/0x20 [ 19.151794] [ 19.151816] Allocated by task 259: [ 19.151873] kasan_save_stack+0x3c/0x68 [ 19.152176] kasan_save_track+0x20/0x40 [ 19.152221] kasan_save_alloc_info+0x40/0x58 [ 19.152460] __kasan_kmalloc+0xd4/0xd8 [ 19.152800] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.153166] kasan_strings+0xc8/0xb00 [ 19.153319] kunit_try_run_case+0x170/0x3f0 [ 19.153457] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.153790] kthread+0x328/0x630 [ 19.153956] ret_from_fork+0x10/0x20 [ 19.154108] [ 19.154214] Freed by task 259: [ 19.154381] kasan_save_stack+0x3c/0x68 [ 19.154450] kasan_save_track+0x20/0x40 [ 19.154514] kasan_save_free_info+0x4c/0x78 [ 19.154815] __kasan_slab_free+0x6c/0x98 [ 19.155115] kfree+0x214/0x3c8 [ 19.155242] kasan_strings+0x24c/0xb00 [ 19.155319] kunit_try_run_case+0x170/0x3f0 [ 19.155387] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.155597] kthread+0x328/0x630 [ 19.155892] ret_from_fork+0x10/0x20 [ 19.156069] [ 19.156190] The buggy address belongs to the object at fff00000c7832b40 [ 19.156190] which belongs to the cache kmalloc-32 of size 32 [ 19.156297] The buggy address is located 16 bytes inside of [ 19.156297] freed 32-byte region [fff00000c7832b40, fff00000c7832b60) [ 19.156552] [ 19.156881] The buggy address belongs to the physical page: [ 19.157071] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107832 [ 19.157163] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.157415] page_type: f5(slab) [ 19.157689] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.157806] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.157941] page dumped because: kasan: bad access detected [ 19.158095] [ 19.158179] Memory state around the buggy address: [ 19.158220] fff00000c7832a00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.158275] fff00000c7832a80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.158644] >fff00000c7832b00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.158761] ^ [ 19.158863] fff00000c7832b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.158950] fff00000c7832c00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.159095] ==================================================================
[ 13.358865] ================================================================== [ 13.359759] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 13.360015] Read of size 1 at addr ffff8881038e6250 by task kunit_try_catch/277 [ 13.360641] [ 13.360748] CPU: 0 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.360791] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.360802] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.360822] Call Trace: [ 13.360838] <TASK> [ 13.360852] dump_stack_lvl+0x73/0xb0 [ 13.360879] print_report+0xd1/0x650 [ 13.360901] ? __virt_addr_valid+0x1db/0x2d0 [ 13.360924] ? kasan_strings+0xcbc/0xe80 [ 13.360945] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.360967] ? kasan_strings+0xcbc/0xe80 [ 13.360987] kasan_report+0x141/0x180 [ 13.361008] ? kasan_strings+0xcbc/0xe80 [ 13.361033] __asan_report_load1_noabort+0x18/0x20 [ 13.361058] kasan_strings+0xcbc/0xe80 [ 13.361077] ? trace_hardirqs_on+0x37/0xe0 [ 13.361111] ? __pfx_kasan_strings+0x10/0x10 [ 13.361131] ? finish_task_switch.isra.0+0x153/0x700 [ 13.361151] ? __switch_to+0x47/0xf50 [ 13.361174] ? __schedule+0x10cc/0x2b60 [ 13.361196] ? __pfx_read_tsc+0x10/0x10 [ 13.361217] ? ktime_get_ts64+0x86/0x230 [ 13.361240] kunit_try_run_case+0x1a5/0x480 [ 13.361262] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.361284] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.361304] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.361327] ? __kthread_parkme+0x82/0x180 [ 13.361346] ? preempt_count_sub+0x50/0x80 [ 13.361368] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.361391] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.361413] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.361436] kthread+0x337/0x6f0 [ 13.361455] ? trace_preempt_on+0x20/0xc0 [ 13.361477] ? __pfx_kthread+0x10/0x10 [ 13.361499] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.361520] ? calculate_sigpending+0x7b/0xa0 [ 13.361543] ? __pfx_kthread+0x10/0x10 [ 13.361563] ret_from_fork+0x116/0x1d0 [ 13.361581] ? __pfx_kthread+0x10/0x10 [ 13.361675] ret_from_fork_asm+0x1a/0x30 [ 13.361707] </TASK> [ 13.361718] [ 13.372308] Allocated by task 277: [ 13.372487] kasan_save_stack+0x45/0x70 [ 13.372678] kasan_save_track+0x18/0x40 [ 13.372853] kasan_save_alloc_info+0x3b/0x50 [ 13.373050] __kasan_kmalloc+0xb7/0xc0 [ 13.373362] __kmalloc_cache_noprof+0x189/0x420 [ 13.373573] kasan_strings+0xc0/0xe80 [ 13.373744] kunit_try_run_case+0x1a5/0x480 [ 13.373930] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.374210] kthread+0x337/0x6f0 [ 13.374433] ret_from_fork+0x116/0x1d0 [ 13.374592] ret_from_fork_asm+0x1a/0x30 [ 13.374767] [ 13.374856] Freed by task 277: [ 13.374998] kasan_save_stack+0x45/0x70 [ 13.376123] kasan_save_track+0x18/0x40 [ 13.376292] kasan_save_free_info+0x3f/0x60 [ 13.376449] __kasan_slab_free+0x56/0x70 [ 13.376591] kfree+0x222/0x3f0 [ 13.376711] kasan_strings+0x2aa/0xe80 [ 13.376847] kunit_try_run_case+0x1a5/0x480 [ 13.376997] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.377795] kthread+0x337/0x6f0 [ 13.377966] ret_from_fork+0x116/0x1d0 [ 13.378412] ret_from_fork_asm+0x1a/0x30 [ 13.378571] [ 13.378734] The buggy address belongs to the object at ffff8881038e6240 [ 13.378734] which belongs to the cache kmalloc-32 of size 32 [ 13.379340] The buggy address is located 16 bytes inside of [ 13.379340] freed 32-byte region [ffff8881038e6240, ffff8881038e6260) [ 13.379804] [ 13.379895] The buggy address belongs to the physical page: [ 13.380142] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038e6 [ 13.381485] flags: 0x200000000000000(node=0|zone=2) [ 13.381821] page_type: f5(slab) [ 13.382410] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.382761] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.383074] page dumped because: kasan: bad access detected [ 13.383273] [ 13.383359] Memory state around the buggy address: [ 13.383624] ffff8881038e6100: 00 00 00 fc fc fc fc fc 00 00 00 04 fc fc fc fc [ 13.383952] ffff8881038e6180: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.384192] >ffff8881038e6200: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.384474] ^ [ 13.384693] ffff8881038e6280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.385007] ffff8881038e6300: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.385857] ==================================================================