Date
July 12, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.749032] ================================================================== [ 18.749100] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 18.749156] Read of size 1 at addr fff00000c66fec50 by task kunit_try_catch/259 [ 18.749222] [ 18.749257] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 18.749345] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.749375] Hardware name: linux,dummy-virt (DT) [ 18.749419] Call trace: [ 18.749445] show_stack+0x20/0x38 (C) [ 18.749496] dump_stack_lvl+0x8c/0xd0 [ 18.749543] print_report+0x118/0x5d0 [ 18.749591] kasan_report+0xdc/0x128 [ 18.749638] __asan_report_load1_noabort+0x20/0x30 [ 18.749692] strcmp+0xc0/0xc8 [ 18.749734] kasan_strings+0x340/0xb00 [ 18.749780] kunit_try_run_case+0x170/0x3f0 [ 18.749835] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.749891] kthread+0x328/0x630 [ 18.749937] ret_from_fork+0x10/0x20 [ 18.749998] [ 18.750020] Allocated by task 259: [ 18.750050] kasan_save_stack+0x3c/0x68 [ 18.750101] kasan_save_track+0x20/0x40 [ 18.750143] kasan_save_alloc_info+0x40/0x58 [ 18.750866] __kasan_kmalloc+0xd4/0xd8 [ 18.750924] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.750968] kasan_strings+0xc8/0xb00 [ 18.751006] kunit_try_run_case+0x170/0x3f0 [ 18.751116] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.751168] kthread+0x328/0x630 [ 18.751589] ret_from_fork+0x10/0x20 [ 18.751688] [ 18.751823] Freed by task 259: [ 18.751913] kasan_save_stack+0x3c/0x68 [ 18.751981] kasan_save_track+0x20/0x40 [ 18.752187] kasan_save_free_info+0x4c/0x78 [ 18.752278] __kasan_slab_free+0x6c/0x98 [ 18.752360] kfree+0x214/0x3c8 [ 18.752499] kasan_strings+0x24c/0xb00 [ 18.752579] kunit_try_run_case+0x170/0x3f0 [ 18.752691] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.752819] kthread+0x328/0x630 [ 18.752935] ret_from_fork+0x10/0x20 [ 18.753081] [ 18.753152] The buggy address belongs to the object at fff00000c66fec40 [ 18.753152] which belongs to the cache kmalloc-32 of size 32 [ 18.753240] The buggy address is located 16 bytes inside of [ 18.753240] freed 32-byte region [fff00000c66fec40, fff00000c66fec60) [ 18.753426] [ 18.753674] The buggy address belongs to the physical page: [ 18.753848] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1066fe [ 18.753958] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.754076] page_type: f5(slab) [ 18.754141] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.754381] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.754505] page dumped because: kasan: bad access detected [ 18.754581] [ 18.754740] Memory state around the buggy address: [ 18.754828] fff00000c66feb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.755040] fff00000c66feb80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.755123] >fff00000c66fec00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 18.755269] ^ [ 18.755312] fff00000c66fec80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.755793] fff00000c66fed00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 18.755919] ==================================================================
[ 14.933954] ================================================================== [ 14.935029] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.935331] Read of size 1 at addr ffff888103a693d0 by task kunit_try_catch/276 [ 14.935629] [ 14.935735] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.935779] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.935790] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.935812] Call Trace: [ 14.935824] <TASK> [ 14.935839] dump_stack_lvl+0x73/0xb0 [ 14.935866] print_report+0xd1/0x610 [ 14.935891] ? __virt_addr_valid+0x1db/0x2d0 [ 14.935914] ? strcmp+0xb0/0xc0 [ 14.935931] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.935955] ? strcmp+0xb0/0xc0 [ 14.935972] kasan_report+0x141/0x180 [ 14.935994] ? strcmp+0xb0/0xc0 [ 14.936015] __asan_report_load1_noabort+0x18/0x20 [ 14.936041] strcmp+0xb0/0xc0 [ 14.936060] kasan_strings+0x431/0xe80 [ 14.936079] ? trace_hardirqs_on+0x37/0xe0 [ 14.936103] ? __pfx_kasan_strings+0x10/0x10 [ 14.936124] ? finish_task_switch.isra.0+0x153/0x700 [ 14.936148] ? __switch_to+0x47/0xf50 [ 14.936173] ? __schedule+0x10cc/0x2b60 [ 14.936196] ? __pfx_read_tsc+0x10/0x10 [ 14.936217] ? ktime_get_ts64+0x86/0x230 [ 14.936241] kunit_try_run_case+0x1a5/0x480 [ 14.936277] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.936300] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.936325] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.936350] ? __kthread_parkme+0x82/0x180 [ 14.936370] ? preempt_count_sub+0x50/0x80 [ 14.936393] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.936418] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.936443] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.936469] kthread+0x337/0x6f0 [ 14.936488] ? trace_preempt_on+0x20/0xc0 [ 14.936511] ? __pfx_kthread+0x10/0x10 [ 14.936531] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.936552] ? calculate_sigpending+0x7b/0xa0 [ 14.936577] ? __pfx_kthread+0x10/0x10 [ 14.936598] ret_from_fork+0x116/0x1d0 [ 14.936616] ? __pfx_kthread+0x10/0x10 [ 14.936637] ret_from_fork_asm+0x1a/0x30 [ 14.936669] </TASK> [ 14.936679] [ 14.943477] Allocated by task 276: [ 14.943604] kasan_save_stack+0x45/0x70 [ 14.943775] kasan_save_track+0x18/0x40 [ 14.943968] kasan_save_alloc_info+0x3b/0x50 [ 14.944181] __kasan_kmalloc+0xb7/0xc0 [ 14.944379] __kmalloc_cache_noprof+0x189/0x420 [ 14.944615] kasan_strings+0xc0/0xe80 [ 14.944802] kunit_try_run_case+0x1a5/0x480 [ 14.945021] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.945289] kthread+0x337/0x6f0 [ 14.945458] ret_from_fork+0x116/0x1d0 [ 14.945622] ret_from_fork_asm+0x1a/0x30 [ 14.945798] [ 14.945868] Freed by task 276: [ 14.945977] kasan_save_stack+0x45/0x70 [ 14.946112] kasan_save_track+0x18/0x40 [ 14.946246] kasan_save_free_info+0x3f/0x60 [ 14.946442] __kasan_slab_free+0x56/0x70 [ 14.946638] kfree+0x222/0x3f0 [ 14.946805] kasan_strings+0x2aa/0xe80 [ 14.946991] kunit_try_run_case+0x1a5/0x480 [ 14.947198] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.947454] kthread+0x337/0x6f0 [ 14.947575] ret_from_fork+0x116/0x1d0 [ 14.947708] ret_from_fork_asm+0x1a/0x30 [ 14.947847] [ 14.947917] The buggy address belongs to the object at ffff888103a693c0 [ 14.947917] which belongs to the cache kmalloc-32 of size 32 [ 14.948417] The buggy address is located 16 bytes inside of [ 14.948417] freed 32-byte region [ffff888103a693c0, ffff888103a693e0) [ 14.948937] [ 14.949036] The buggy address belongs to the physical page: [ 14.949295] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a69 [ 14.949651] flags: 0x200000000000000(node=0|zone=2) [ 14.949839] page_type: f5(slab) [ 14.950003] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.950309] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.950612] page dumped because: kasan: bad access detected [ 14.950787] [ 14.950854] Memory state around the buggy address: [ 14.952791] ffff888103a69280: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.953025] ffff888103a69300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.953244] >ffff888103a69380: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.953475] ^ [ 14.953692] ffff888103a69400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.954003] ffff888103a69480: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.954341] ==================================================================