Date
July 25, 2025, 3:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.644884] ================================================================== [ 34.644942] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 34.645044] Read of size 1 at addr fff00000c9a94390 by task kunit_try_catch/291 [ 34.645230] [ 34.645703] CPU: 0 UID: 0 PID: 291 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250725 #1 PREEMPT [ 34.645807] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 34.645842] Hardware name: linux,dummy-virt (DT) [ 34.645875] Call trace: [ 34.645899] show_stack+0x20/0x38 (C) [ 34.646037] dump_stack_lvl+0x8c/0xd0 [ 34.646091] print_report+0x118/0x5e8 [ 34.646403] kasan_report+0xdc/0x128 [ 34.646534] __asan_report_load1_noabort+0x20/0x30 [ 34.646589] strnlen+0x80/0x88 [ 34.646634] kasan_strings+0x478/0xb00 [ 34.646739] kunit_try_run_case+0x170/0x3f0 [ 34.646815] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.646882] kthread+0x328/0x630 [ 34.646939] ret_from_fork+0x10/0x20 [ 34.647002] [ 34.647024] Allocated by task 291: [ 34.647069] kasan_save_stack+0x3c/0x68 [ 34.647109] kasan_save_track+0x20/0x40 [ 34.647145] kasan_save_alloc_info+0x40/0x58 [ 34.647186] __kasan_kmalloc+0xd4/0xd8 [ 34.647469] __kmalloc_cache_noprof+0x16c/0x3c0 [ 34.647571] kasan_strings+0xc8/0xb00 [ 34.647650] kunit_try_run_case+0x170/0x3f0 [ 34.647775] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.648250] kthread+0x328/0x630 [ 34.648321] ret_from_fork+0x10/0x20 [ 34.648361] [ 34.648383] Freed by task 291: [ 34.648414] kasan_save_stack+0x3c/0x68 [ 34.648452] kasan_save_track+0x20/0x40 [ 34.648489] kasan_save_free_info+0x4c/0x78 [ 34.648530] __kasan_slab_free+0x7c/0xa8 [ 34.648576] kfree+0x214/0x3c8 [ 34.648614] kasan_strings+0x24c/0xb00 [ 34.648669] kunit_try_run_case+0x170/0x3f0 [ 34.648709] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.648974] kthread+0x328/0x630 [ 34.649044] ret_from_fork+0x10/0x20 [ 34.649093] [ 34.649161] The buggy address belongs to the object at fff00000c9a94380 [ 34.649161] which belongs to the cache kmalloc-32 of size 32 [ 34.649242] The buggy address is located 16 bytes inside of [ 34.649242] freed 32-byte region [fff00000c9a94380, fff00000c9a943a0) [ 34.649305] [ 34.649327] The buggy address belongs to the physical page: [ 34.649365] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a94 [ 34.649561] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.649616] page_type: f5(slab) [ 34.649667] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 34.649720] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 34.649967] page dumped because: kasan: bad access detected [ 34.650055] [ 34.650167] Memory state around the buggy address: [ 34.650244] fff00000c9a94280: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 34.650381] fff00000c9a94300: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 34.650495] >fff00000c9a94380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 34.650605] ^ [ 34.650705] fff00000c9a94400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 34.650784] fff00000c9a94480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 34.650902] ==================================================================
[ 27.807593] ================================================================== [ 27.808234] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 27.808608] Read of size 1 at addr ffff88810625ff90 by task kunit_try_catch/308 [ 27.809242] [ 27.809348] CPU: 1 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary) [ 27.809399] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.809412] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.809434] Call Trace: [ 27.809454] <TASK> [ 27.809470] dump_stack_lvl+0x73/0xb0 [ 27.809499] print_report+0xd1/0x640 [ 27.809522] ? __virt_addr_valid+0x1db/0x2d0 [ 27.809547] ? strnlen+0x73/0x80 [ 27.809567] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.809595] ? strnlen+0x73/0x80 [ 27.809616] kasan_report+0x141/0x180 [ 27.809640] ? strnlen+0x73/0x80 [ 27.809667] __asan_report_load1_noabort+0x18/0x20 [ 27.809694] strnlen+0x73/0x80 [ 27.809719] kasan_strings+0x615/0xe80 [ 27.809739] ? trace_hardirqs_on+0x37/0xe0 [ 27.809764] ? __pfx_kasan_strings+0x10/0x10 [ 27.809789] ? finish_task_switch.isra.0+0x153/0x700 [ 27.809814] ? __switch_to+0x47/0xf80 [ 27.809842] ? __schedule+0x10da/0x2b60 [ 27.809865] ? __pfx_read_tsc+0x10/0x10 [ 27.809888] ? ktime_get_ts64+0x86/0x230 [ 27.809914] kunit_try_run_case+0x1a5/0x480 [ 27.809940] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.809976] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.809999] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.810027] ? __kthread_parkme+0x82/0x180 [ 27.810049] ? preempt_count_sub+0x50/0x80 [ 27.810241] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.810268] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.810294] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.810321] kthread+0x337/0x6f0 [ 27.810343] ? trace_preempt_on+0x20/0xc0 [ 27.810367] ? __pfx_kthread+0x10/0x10 [ 27.810389] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.810415] ? calculate_sigpending+0x7b/0xa0 [ 27.810439] ? __pfx_kthread+0x10/0x10 [ 27.810462] ret_from_fork+0x116/0x1d0 [ 27.810483] ? __pfx_kthread+0x10/0x10 [ 27.810506] ret_from_fork_asm+0x1a/0x30 [ 27.810538] </TASK> [ 27.810550] [ 27.822963] Allocated by task 308: [ 27.823188] kasan_save_stack+0x45/0x70 [ 27.823664] kasan_save_track+0x18/0x40 [ 27.824070] kasan_save_alloc_info+0x3b/0x50 [ 27.824420] __kasan_kmalloc+0xb7/0xc0 [ 27.824726] __kmalloc_cache_noprof+0x189/0x420 [ 27.825157] kasan_strings+0xc0/0xe80 [ 27.825445] kunit_try_run_case+0x1a5/0x480 [ 27.825616] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.826193] kthread+0x337/0x6f0 [ 27.826382] ret_from_fork+0x116/0x1d0 [ 27.826535] ret_from_fork_asm+0x1a/0x30 [ 27.827093] [ 27.827181] Freed by task 308: [ 27.827501] kasan_save_stack+0x45/0x70 [ 27.827805] kasan_save_track+0x18/0x40 [ 27.828028] kasan_save_free_info+0x3f/0x60 [ 27.828646] __kasan_slab_free+0x5e/0x80 [ 27.828840] kfree+0x222/0x3f0 [ 27.829276] kasan_strings+0x2aa/0xe80 [ 27.829581] kunit_try_run_case+0x1a5/0x480 [ 27.829914] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.830385] kthread+0x337/0x6f0 [ 27.830695] ret_from_fork+0x116/0x1d0 [ 27.831133] ret_from_fork_asm+0x1a/0x30 [ 27.831353] [ 27.831446] The buggy address belongs to the object at ffff88810625ff80 [ 27.831446] which belongs to the cache kmalloc-32 of size 32 [ 27.832062] The buggy address is located 16 bytes inside of [ 27.832062] freed 32-byte region [ffff88810625ff80, ffff88810625ffa0) [ 27.833064] [ 27.833188] The buggy address belongs to the physical page: [ 27.833624] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10625f [ 27.834235] flags: 0x200000000000000(node=0|zone=2) [ 27.834554] page_type: f5(slab) [ 27.834737] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 27.835408] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 27.835807] page dumped because: kasan: bad access detected [ 27.836254] [ 27.836356] Memory state around the buggy address: [ 27.836583] ffff88810625fe80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.836901] ffff88810625ff00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 27.837554] >ffff88810625ff80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.837993] ^ [ 27.838398] ffff888106260000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.839060] ffff888106260080: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 27.839501] ==================================================================