Date
July 2, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.421956] ================================================================== [ 20.422317] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 20.422477] Read of size 1 at addr fff00000c58a9390 by task kunit_try_catch/259 [ 20.422536] [ 20.422958] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 20.423200] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.423434] Hardware name: linux,dummy-virt (DT) [ 20.423528] Call trace: [ 20.423567] show_stack+0x20/0x38 (C) [ 20.423661] dump_stack_lvl+0x8c/0xd0 [ 20.423716] print_report+0x118/0x608 [ 20.423767] kasan_report+0xdc/0x128 [ 20.424160] __asan_report_load1_noabort+0x20/0x30 [ 20.424239] strcmp+0xc0/0xc8 [ 20.424284] kasan_strings+0x340/0xb00 [ 20.424707] kunit_try_run_case+0x170/0x3f0 [ 20.424788] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.425057] kthread+0x328/0x630 [ 20.425149] ret_from_fork+0x10/0x20 [ 20.425218] [ 20.425475] Allocated by task 259: [ 20.425566] kasan_save_stack+0x3c/0x68 [ 20.425814] kasan_save_track+0x20/0x40 [ 20.425901] kasan_save_alloc_info+0x40/0x58 [ 20.425992] __kasan_kmalloc+0xd4/0xd8 [ 20.426088] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.426133] kasan_strings+0xc8/0xb00 [ 20.426325] kunit_try_run_case+0x170/0x3f0 [ 20.426443] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.427026] kthread+0x328/0x630 [ 20.427222] ret_from_fork+0x10/0x20 [ 20.427293] [ 20.427352] Freed by task 259: [ 20.427486] kasan_save_stack+0x3c/0x68 [ 20.427551] kasan_save_track+0x20/0x40 [ 20.427885] kasan_save_free_info+0x4c/0x78 [ 20.428075] __kasan_slab_free+0x6c/0x98 [ 20.428240] kfree+0x214/0x3c8 [ 20.428286] kasan_strings+0x24c/0xb00 [ 20.428380] kunit_try_run_case+0x170/0x3f0 [ 20.428543] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.428624] kthread+0x328/0x630 [ 20.428660] ret_from_fork+0x10/0x20 [ 20.428710] [ 20.428755] The buggy address belongs to the object at fff00000c58a9380 [ 20.428755] which belongs to the cache kmalloc-32 of size 32 [ 20.429176] The buggy address is located 16 bytes inside of [ 20.429176] freed 32-byte region [fff00000c58a9380, fff00000c58a93a0) [ 20.429485] [ 20.429724] The buggy address belongs to the physical page: [ 20.429787] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058a9 [ 20.430159] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.430239] page_type: f5(slab) [ 20.430513] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.430801] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.430868] page dumped because: kasan: bad access detected [ 20.431038] [ 20.431187] Memory state around the buggy address: [ 20.431285] fff00000c58a9280: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.431639] fff00000c58a9300: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.431710] >fff00000c58a9380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.431808] ^ [ 20.431862] fff00000c58a9400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.431926] fff00000c58a9480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.432144] ==================================================================
[ 13.363427] ================================================================== [ 13.364512] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 13.365063] Read of size 1 at addr ffff888103988590 by task kunit_try_catch/278 [ 13.365334] [ 13.365464] CPU: 1 UID: 0 PID: 278 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.365516] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.365530] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.365552] Call Trace: [ 13.365563] <TASK> [ 13.365581] dump_stack_lvl+0x73/0xb0 [ 13.365783] print_report+0xd1/0x650 [ 13.365817] ? __virt_addr_valid+0x1db/0x2d0 [ 13.365842] ? strcmp+0xb0/0xc0 [ 13.365862] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.365884] ? strcmp+0xb0/0xc0 [ 13.365904] kasan_report+0x141/0x180 [ 13.365926] ? strcmp+0xb0/0xc0 [ 13.365959] __asan_report_load1_noabort+0x18/0x20 [ 13.365982] strcmp+0xb0/0xc0 [ 13.366004] kasan_strings+0x431/0xe80 [ 13.366024] ? trace_hardirqs_on+0x37/0xe0 [ 13.366048] ? __pfx_kasan_strings+0x10/0x10 [ 13.366069] ? finish_task_switch.isra.0+0x153/0x700 [ 13.366091] ? __switch_to+0x47/0xf50 [ 13.366117] ? __schedule+0x10cc/0x2b60 [ 13.366139] ? __pfx_read_tsc+0x10/0x10 [ 13.366159] ? ktime_get_ts64+0x86/0x230 [ 13.366183] kunit_try_run_case+0x1a5/0x480 [ 13.366210] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.366231] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.366254] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.366276] ? __kthread_parkme+0x82/0x180 [ 13.366299] ? preempt_count_sub+0x50/0x80 [ 13.366321] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.366344] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.366382] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.366405] kthread+0x337/0x6f0 [ 13.366424] ? trace_preempt_on+0x20/0xc0 [ 13.366445] ? __pfx_kthread+0x10/0x10 [ 13.366466] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.366485] ? calculate_sigpending+0x7b/0xa0 [ 13.366508] ? __pfx_kthread+0x10/0x10 [ 13.366529] ret_from_fork+0x116/0x1d0 [ 13.366546] ? __pfx_kthread+0x10/0x10 [ 13.366565] ret_from_fork_asm+0x1a/0x30 [ 13.366608] </TASK> [ 13.366620] [ 13.374184] Allocated by task 278: [ 13.374322] kasan_save_stack+0x45/0x70 [ 13.374885] kasan_save_track+0x18/0x40 [ 13.375099] kasan_save_alloc_info+0x3b/0x50 [ 13.375315] __kasan_kmalloc+0xb7/0xc0 [ 13.375527] __kmalloc_cache_noprof+0x189/0x420 [ 13.375955] kasan_strings+0xc0/0xe80 [ 13.376092] kunit_try_run_case+0x1a5/0x480 [ 13.376262] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.376535] kthread+0x337/0x6f0 [ 13.376715] ret_from_fork+0x116/0x1d0 [ 13.376989] ret_from_fork_asm+0x1a/0x30 [ 13.377169] [ 13.377251] Freed by task 278: [ 13.377402] kasan_save_stack+0x45/0x70 [ 13.377540] kasan_save_track+0x18/0x40 [ 13.377674] kasan_save_free_info+0x3f/0x60 [ 13.377822] __kasan_slab_free+0x56/0x70 [ 13.378006] kfree+0x222/0x3f0 [ 13.378168] kasan_strings+0x2aa/0xe80 [ 13.378423] kunit_try_run_case+0x1a5/0x480 [ 13.378998] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.379279] kthread+0x337/0x6f0 [ 13.379416] ret_from_fork+0x116/0x1d0 [ 13.379548] ret_from_fork_asm+0x1a/0x30 [ 13.379863] [ 13.379962] The buggy address belongs to the object at ffff888103988580 [ 13.379962] which belongs to the cache kmalloc-32 of size 32 [ 13.380511] The buggy address is located 16 bytes inside of [ 13.380511] freed 32-byte region [ffff888103988580, ffff8881039885a0) [ 13.381018] [ 13.381095] The buggy address belongs to the physical page: [ 13.381297] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103988 [ 13.381660] flags: 0x200000000000000(node=0|zone=2) [ 13.381994] page_type: f5(slab) [ 13.382173] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.382493] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.382719] page dumped because: kasan: bad access detected [ 13.382920] [ 13.383039] Memory state around the buggy address: [ 13.383409] ffff888103988480: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.383724] ffff888103988500: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 13.384093] >ffff888103988580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.384370] ^ [ 13.384529] ffff888103988600: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.384871] ffff888103988680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.385130] ==================================================================