Date
July 24, 2025, 4:41 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.770724] ================================================================== [ 34.771205] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 34.771526] Read of size 1 at addr fff00000c9b90d10 by task kunit_try_catch/290 [ 34.771642] [ 34.771718] CPU: 1 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250724 #1 PREEMPT [ 34.771874] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.771916] Hardware name: linux,dummy-virt (DT) [ 34.771952] Call trace: [ 34.771981] show_stack+0x20/0x38 (C) [ 34.772141] dump_stack_lvl+0x8c/0xd0 [ 34.772271] print_report+0x118/0x5e8 [ 34.772326] kasan_report+0xdc/0x128 [ 34.772425] __asan_report_load1_noabort+0x20/0x30 [ 34.772521] strcmp+0xc0/0xc8 [ 34.772595] kasan_strings+0x340/0xb00 [ 34.772679] kunit_try_run_case+0x170/0x3f0 [ 34.772796] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.772880] kthread+0x328/0x630 [ 34.772924] ret_from_fork+0x10/0x20 [ 34.772976] [ 34.772997] Allocated by task 290: [ 34.773055] kasan_save_stack+0x3c/0x68 [ 34.773196] kasan_save_track+0x20/0x40 [ 34.773309] kasan_save_alloc_info+0x40/0x58 [ 34.773360] __kasan_kmalloc+0xd4/0xd8 [ 34.773398] __kmalloc_cache_noprof+0x16c/0x3c0 [ 34.773684] kasan_strings+0xc8/0xb00 [ 34.773805] kunit_try_run_case+0x170/0x3f0 [ 34.773861] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.773963] kthread+0x328/0x630 [ 34.774033] ret_from_fork+0x10/0x20 [ 34.774133] [ 34.774207] Freed by task 290: [ 34.774266] kasan_save_stack+0x3c/0x68 [ 34.774318] kasan_save_track+0x20/0x40 [ 34.774355] kasan_save_free_info+0x4c/0x78 [ 34.774586] __kasan_slab_free+0x6c/0x98 [ 34.774718] kfree+0x214/0x3c8 [ 34.774834] kasan_strings+0x24c/0xb00 [ 34.774937] kunit_try_run_case+0x170/0x3f0 [ 34.775083] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.775140] kthread+0x328/0x630 [ 34.775213] ret_from_fork+0x10/0x20 [ 34.775300] [ 34.775336] The buggy address belongs to the object at fff00000c9b90d00 [ 34.775336] which belongs to the cache kmalloc-32 of size 32 [ 34.775434] The buggy address is located 16 bytes inside of [ 34.775434] freed 32-byte region [fff00000c9b90d00, fff00000c9b90d20) [ 34.775554] [ 34.775624] The buggy address belongs to the physical page: [ 34.775690] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109b90 [ 34.775760] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.775830] page_type: f5(slab) [ 34.775875] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 34.775929] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 34.775971] page dumped because: kasan: bad access detected [ 34.776032] [ 34.776053] Memory state around the buggy address: [ 34.776208] fff00000c9b90c00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 34.776259] fff00000c9b90c80: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 34.776313] >fff00000c9b90d00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 34.776405] ^ [ 34.776452] fff00000c9b90d80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 34.776534] fff00000c9b90e00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 34.776663] ==================================================================
[ 28.821737] ================================================================== [ 28.822661] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 28.822910] Read of size 1 at addr ffff888106048f50 by task kunit_try_catch/307 [ 28.823218] [ 28.823310] CPU: 1 UID: 0 PID: 307 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) [ 28.823365] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 28.823377] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 28.823401] Call Trace: [ 28.823414] <TASK> [ 28.823432] dump_stack_lvl+0x73/0xb0 [ 28.823460] print_report+0xd1/0x640 [ 28.823485] ? __virt_addr_valid+0x1db/0x2d0 [ 28.823510] ? strcmp+0xb0/0xc0 [ 28.823528] ? kasan_complete_mode_report_info+0x64/0x200 [ 28.823554] ? strcmp+0xb0/0xc0 [ 28.823585] kasan_report+0x141/0x180 [ 28.823607] ? strcmp+0xb0/0xc0 [ 28.823631] __asan_report_load1_noabort+0x18/0x20 [ 28.823655] strcmp+0xb0/0xc0 [ 28.823675] kasan_strings+0x431/0xe80 [ 28.823696] ? trace_hardirqs_on+0x37/0xe0 [ 28.823719] ? __pfx_kasan_strings+0x10/0x10 [ 28.823738] ? finish_task_switch.isra.0+0x153/0x700 [ 28.823761] ? __switch_to+0x47/0xf80 [ 28.823786] ? __schedule+0x10da/0x2b60 [ 28.823810] ? __pfx_read_tsc+0x10/0x10 [ 28.823832] ? ktime_get_ts64+0x86/0x230 [ 28.823856] kunit_try_run_case+0x1a5/0x480 [ 28.823881] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.823903] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 28.824276] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 28.824306] ? __kthread_parkme+0x82/0x180 [ 28.824328] ? preempt_count_sub+0x50/0x80 [ 28.824352] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.824377] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.824401] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 28.824425] kthread+0x337/0x6f0 [ 28.824444] ? trace_preempt_on+0x20/0xc0 [ 28.824467] ? __pfx_kthread+0x10/0x10 [ 28.824487] ? _raw_spin_unlock_irq+0x47/0x80 [ 28.824510] ? calculate_sigpending+0x7b/0xa0 [ 28.824534] ? __pfx_kthread+0x10/0x10 [ 28.824554] ret_from_fork+0x116/0x1d0 [ 28.824586] ? __pfx_kthread+0x10/0x10 [ 28.824607] ret_from_fork_asm+0x1a/0x30 [ 28.824640] </TASK> [ 28.824651] [ 28.835339] Allocated by task 307: [ 28.835509] kasan_save_stack+0x45/0x70 [ 28.835732] kasan_save_track+0x18/0x40 [ 28.835866] kasan_save_alloc_info+0x3b/0x50 [ 28.836029] __kasan_kmalloc+0xb7/0xc0 [ 28.836323] __kmalloc_cache_noprof+0x189/0x420 [ 28.836645] kasan_strings+0xc0/0xe80 [ 28.836810] kunit_try_run_case+0x1a5/0x480 [ 28.837045] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.837304] kthread+0x337/0x6f0 [ 28.837458] ret_from_fork+0x116/0x1d0 [ 28.837594] ret_from_fork_asm+0x1a/0x30 [ 28.837727] [ 28.837791] Freed by task 307: [ 28.837894] kasan_save_stack+0x45/0x70 [ 28.838254] kasan_save_track+0x18/0x40 [ 28.838443] kasan_save_free_info+0x3f/0x60 [ 28.838658] __kasan_slab_free+0x56/0x70 [ 28.838934] kfree+0x222/0x3f0 [ 28.839090] kasan_strings+0x2aa/0xe80 [ 28.839279] kunit_try_run_case+0x1a5/0x480 [ 28.839430] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.839634] kthread+0x337/0x6f0 [ 28.839796] ret_from_fork+0x116/0x1d0 [ 28.840124] ret_from_fork_asm+0x1a/0x30 [ 28.840332] [ 28.840414] The buggy address belongs to the object at ffff888106048f40 [ 28.840414] which belongs to the cache kmalloc-32 of size 32 [ 28.841012] The buggy address is located 16 bytes inside of [ 28.841012] freed 32-byte region [ffff888106048f40, ffff888106048f60) [ 28.841475] [ 28.841551] The buggy address belongs to the physical page: [ 28.841780] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106048 [ 28.842250] flags: 0x200000000000000(node=0|zone=2) [ 28.842417] page_type: f5(slab) [ 28.842537] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 28.842885] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 28.843223] page dumped because: kasan: bad access detected [ 28.843498] [ 28.843560] Memory state around the buggy address: [ 28.843750] ffff888106048e00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.844417] ffff888106048e80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.844776] >ffff888106048f00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 28.845340] ^ [ 28.845544] ffff888106048f80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.845768] ffff888106049000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.845993] ==================================================================