Date
July 1, 2025, 3:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.208293] ================================================================== [ 19.208456] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 19.208559] Read of size 1 at addr fff00000c57eabd0 by task kunit_try_catch/260 [ 19.208629] [ 19.208684] CPU: 0 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.208774] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.208804] Hardware name: linux,dummy-virt (DT) [ 19.208839] Call trace: [ 19.208865] show_stack+0x20/0x38 (C) [ 19.208919] dump_stack_lvl+0x8c/0xd0 [ 19.208968] print_report+0x118/0x608 [ 19.209018] kasan_report+0xdc/0x128 [ 19.209065] __asan_report_load1_noabort+0x20/0x30 [ 19.209117] strcmp+0xc0/0xc8 [ 19.209159] kasan_strings+0x340/0xb00 [ 19.209206] kunit_try_run_case+0x170/0x3f0 [ 19.209271] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.210223] kthread+0x328/0x630 [ 19.210503] ret_from_fork+0x10/0x20 [ 19.210669] [ 19.210727] Allocated by task 260: [ 19.210811] kasan_save_stack+0x3c/0x68 [ 19.210861] kasan_save_track+0x20/0x40 [ 19.211162] kasan_save_alloc_info+0x40/0x58 [ 19.211298] __kasan_kmalloc+0xd4/0xd8 [ 19.211588] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.211715] kasan_strings+0xc8/0xb00 [ 19.211795] kunit_try_run_case+0x170/0x3f0 [ 19.212035] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.212241] kthread+0x328/0x630 [ 19.212339] ret_from_fork+0x10/0x20 [ 19.212465] [ 19.212515] Freed by task 260: [ 19.212548] kasan_save_stack+0x3c/0x68 [ 19.212871] kasan_save_track+0x20/0x40 [ 19.212942] kasan_save_free_info+0x4c/0x78 [ 19.213014] __kasan_slab_free+0x6c/0x98 [ 19.213161] kfree+0x214/0x3c8 [ 19.213218] kasan_strings+0x24c/0xb00 [ 19.213393] kunit_try_run_case+0x170/0x3f0 [ 19.213596] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.213693] kthread+0x328/0x630 [ 19.213885] ret_from_fork+0x10/0x20 [ 19.213936] [ 19.214063] The buggy address belongs to the object at fff00000c57eabc0 [ 19.214063] which belongs to the cache kmalloc-32 of size 32 [ 19.214238] The buggy address is located 16 bytes inside of [ 19.214238] freed 32-byte region [fff00000c57eabc0, fff00000c57eabe0) [ 19.214410] [ 19.214465] The buggy address belongs to the physical page: [ 19.214558] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057ea [ 19.214673] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.214875] page_type: f5(slab) [ 19.215064] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.215170] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.215310] page dumped because: kasan: bad access detected [ 19.215369] [ 19.215389] Memory state around the buggy address: [ 19.215583] fff00000c57eaa80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.215823] fff00000c57eab00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.215920] >fff00000c57eab80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.215964] ^ [ 19.216209] fff00000c57eac00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.216445] fff00000c57eac80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.216532] ==================================================================
[ 13.561844] ================================================================== [ 13.564079] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 13.564553] Read of size 1 at addr ffff8881033c1910 by task kunit_try_catch/276 [ 13.564831] [ 13.565006] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.565067] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.565079] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.565102] Call Trace: [ 13.565116] <TASK> [ 13.565137] dump_stack_lvl+0x73/0xb0 [ 13.565165] print_report+0xd1/0x650 [ 13.565189] ? __virt_addr_valid+0x1db/0x2d0 [ 13.565214] ? strcmp+0xb0/0xc0 [ 13.565234] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.565256] ? strcmp+0xb0/0xc0 [ 13.565276] kasan_report+0x141/0x180 [ 13.565297] ? strcmp+0xb0/0xc0 [ 13.565323] __asan_report_load1_noabort+0x18/0x20 [ 13.565346] strcmp+0xb0/0xc0 [ 13.565367] kasan_strings+0x431/0xe80 [ 13.565386] ? trace_hardirqs_on+0x37/0xe0 [ 13.565409] ? __pfx_kasan_strings+0x10/0x10 [ 13.565429] ? finish_task_switch.isra.0+0x153/0x700 [ 13.565450] ? __switch_to+0x47/0xf50 [ 13.565477] ? __schedule+0x10cc/0x2b60 [ 13.565499] ? __pfx_read_tsc+0x10/0x10 [ 13.565520] ? ktime_get_ts64+0x86/0x230 [ 13.565544] kunit_try_run_case+0x1a5/0x480 [ 13.565569] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.565590] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.565612] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.565635] ? __kthread_parkme+0x82/0x180 [ 13.565686] ? preempt_count_sub+0x50/0x80 [ 13.565708] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.565731] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.565768] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.565953] kthread+0x337/0x6f0 [ 13.565979] ? trace_preempt_on+0x20/0xc0 [ 13.566001] ? __pfx_kthread+0x10/0x10 [ 13.566034] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.566055] ? calculate_sigpending+0x7b/0xa0 [ 13.566079] ? __pfx_kthread+0x10/0x10 [ 13.566100] ret_from_fork+0x116/0x1d0 [ 13.566118] ? __pfx_kthread+0x10/0x10 [ 13.566138] ret_from_fork_asm+0x1a/0x30 [ 13.566170] </TASK> [ 13.566183] [ 13.579130] Allocated by task 276: [ 13.579320] kasan_save_stack+0x45/0x70 [ 13.579520] kasan_save_track+0x18/0x40 [ 13.579762] kasan_save_alloc_info+0x3b/0x50 [ 13.579965] __kasan_kmalloc+0xb7/0xc0 [ 13.580161] __kmalloc_cache_noprof+0x189/0x420 [ 13.580369] kasan_strings+0xc0/0xe80 [ 13.580540] kunit_try_run_case+0x1a5/0x480 [ 13.581179] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.581389] kthread+0x337/0x6f0 [ 13.581540] ret_from_fork+0x116/0x1d0 [ 13.581871] ret_from_fork_asm+0x1a/0x30 [ 13.582079] [ 13.582180] Freed by task 276: [ 13.582337] kasan_save_stack+0x45/0x70 [ 13.582519] kasan_save_track+0x18/0x40 [ 13.582959] kasan_save_free_info+0x3f/0x60 [ 13.583179] __kasan_slab_free+0x56/0x70 [ 13.583364] kfree+0x222/0x3f0 [ 13.583520] kasan_strings+0x2aa/0xe80 [ 13.583762] kunit_try_run_case+0x1a5/0x480 [ 13.583961] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.584206] kthread+0x337/0x6f0 [ 13.584360] ret_from_fork+0x116/0x1d0 [ 13.584530] ret_from_fork_asm+0x1a/0x30 [ 13.584826] [ 13.584920] The buggy address belongs to the object at ffff8881033c1900 [ 13.584920] which belongs to the cache kmalloc-32 of size 32 [ 13.585403] The buggy address is located 16 bytes inside of [ 13.585403] freed 32-byte region [ffff8881033c1900, ffff8881033c1920) [ 13.585915] [ 13.586006] The buggy address belongs to the physical page: [ 13.586246] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1033c1 [ 13.586564] flags: 0x200000000000000(node=0|zone=2) [ 13.586838] page_type: f5(slab) [ 13.586999] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.587315] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.587614] page dumped because: kasan: bad access detected [ 13.588978] [ 13.589072] Memory state around the buggy address: [ 13.589234] ffff8881033c1800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.589449] ffff8881033c1880: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.589784] >ffff8881033c1900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.590009] ^ [ 13.590150] ffff8881033c1980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.590440] ffff8881033c1a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.590666] ==================================================================