Date
June 24, 2025, 12:47 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 27.414153] ================================================================== [ 27.414256] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 27.414376] Read of size 1 at addr fff00000c5a7ce50 by task kunit_try_catch/261 [ 27.414734] [ 27.414833] CPU: 1 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc2 #1 PREEMPT [ 27.415290] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.415568] Hardware name: linux,dummy-virt (DT) [ 27.415949] Call trace: [ 27.416018] show_stack+0x20/0x38 (C) [ 27.416154] dump_stack_lvl+0x8c/0xd0 [ 27.416344] print_report+0x118/0x608 [ 27.416499] kasan_report+0xdc/0x128 [ 27.416806] __asan_report_load1_noabort+0x20/0x30 [ 27.416948] kasan_strings+0x95c/0xb00 [ 27.417097] kunit_try_run_case+0x170/0x3f0 [ 27.417454] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.417700] kthread+0x328/0x630 [ 27.417818] ret_from_fork+0x10/0x20 [ 27.417996] [ 27.418159] Allocated by task 261: [ 27.418239] kasan_save_stack+0x3c/0x68 [ 27.418390] kasan_save_track+0x20/0x40 [ 27.418510] kasan_save_alloc_info+0x40/0x58 [ 27.418714] __kasan_kmalloc+0xd4/0xd8 [ 27.418860] __kmalloc_cache_noprof+0x16c/0x3c0 [ 27.418984] kasan_strings+0xc8/0xb00 [ 27.419181] kunit_try_run_case+0x170/0x3f0 [ 27.419345] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.419503] kthread+0x328/0x630 [ 27.419773] ret_from_fork+0x10/0x20 [ 27.419949] [ 27.420033] Freed by task 261: [ 27.420462] kasan_save_stack+0x3c/0x68 [ 27.420579] kasan_save_track+0x20/0x40 [ 27.420909] kasan_save_free_info+0x4c/0x78 [ 27.421495] __kasan_slab_free+0x6c/0x98 [ 27.421651] kfree+0x214/0x3c8 [ 27.421795] kasan_strings+0x24c/0xb00 [ 27.422059] kunit_try_run_case+0x170/0x3f0 [ 27.422405] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.422761] kthread+0x328/0x630 [ 27.422983] ret_from_fork+0x10/0x20 [ 27.423231] [ 27.423310] The buggy address belongs to the object at fff00000c5a7ce40 [ 27.423310] which belongs to the cache kmalloc-32 of size 32 [ 27.423474] The buggy address is located 16 bytes inside of [ 27.423474] freed 32-byte region [fff00000c5a7ce40, fff00000c5a7ce60) [ 27.423630] [ 27.423685] The buggy address belongs to the physical page: [ 27.423818] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a7c [ 27.423968] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 27.424102] page_type: f5(slab) [ 27.424594] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 27.424838] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 27.424948] page dumped because: kasan: bad access detected [ 27.425246] [ 27.425348] Memory state around the buggy address: [ 27.425608] fff00000c5a7cd00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.425807] fff00000c5a7cd80: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 27.426023] >fff00000c5a7ce00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 27.426270] ^ [ 27.426474] fff00000c5a7ce80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.426709] fff00000c5a7cf00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.426964] ==================================================================
[ 13.981521] ================================================================== [ 13.981832] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 13.982136] Read of size 1 at addr ffff8881039efb10 by task kunit_try_catch/279 [ 13.982518] [ 13.982794] CPU: 0 UID: 0 PID: 279 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc2 #1 PREEMPT(voluntary) [ 13.982894] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.982919] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.982974] Call Trace: [ 13.983031] <TASK> [ 13.983071] dump_stack_lvl+0x73/0xb0 [ 13.983128] print_report+0xd1/0x650 [ 13.983183] ? __virt_addr_valid+0x1db/0x2d0 [ 13.983240] ? kasan_strings+0xcbc/0xe80 [ 13.983280] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.983312] ? kasan_strings+0xcbc/0xe80 [ 13.983333] kasan_report+0x141/0x180 [ 13.983356] ? kasan_strings+0xcbc/0xe80 [ 13.983381] __asan_report_load1_noabort+0x18/0x20 [ 13.983402] kasan_strings+0xcbc/0xe80 [ 13.983421] ? trace_hardirqs_on+0x37/0xe0 [ 13.983453] ? __pfx_kasan_strings+0x10/0x10 [ 13.983484] ? finish_task_switch.isra.0+0x153/0x700 [ 13.983527] ? __switch_to+0x5d9/0xf60 [ 13.983601] ? dequeue_task_fair+0x166/0x4e0 [ 13.983667] ? __schedule+0x10cc/0x2b60 [ 13.983712] ? __pfx_read_tsc+0x10/0x10 [ 13.983746] ? ktime_get_ts64+0x86/0x230 [ 13.983792] kunit_try_run_case+0x1a5/0x480 [ 13.983849] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.983942] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.983990] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.984026] ? __kthread_parkme+0x82/0x180 [ 13.984049] ? preempt_count_sub+0x50/0x80 [ 13.984073] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.984097] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.984120] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.984142] kthread+0x337/0x6f0 [ 13.984159] ? trace_preempt_on+0x20/0xc0 [ 13.984181] ? __pfx_kthread+0x10/0x10 [ 13.984198] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.984219] ? calculate_sigpending+0x7b/0xa0 [ 13.984239] ? __pfx_kthread+0x10/0x10 [ 13.984257] ret_from_fork+0x41/0x80 [ 13.984277] ? __pfx_kthread+0x10/0x10 [ 13.984294] ret_from_fork_asm+0x1a/0x30 [ 13.984323] </TASK> [ 13.984336] [ 13.994813] Allocated by task 279: [ 13.995165] kasan_save_stack+0x45/0x70 [ 13.995532] kasan_save_track+0x18/0x40 [ 13.995911] kasan_save_alloc_info+0x3b/0x50 [ 13.996201] __kasan_kmalloc+0xb7/0xc0 [ 13.996353] __kmalloc_cache_noprof+0x189/0x420 [ 13.996535] kasan_strings+0xc0/0xe80 [ 13.996753] kunit_try_run_case+0x1a5/0x480 [ 13.996933] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.997166] kthread+0x337/0x6f0 [ 13.997420] ret_from_fork+0x41/0x80 [ 13.997788] ret_from_fork_asm+0x1a/0x30 [ 13.998112] [ 13.998280] Freed by task 279: [ 13.998574] kasan_save_stack+0x45/0x70 [ 13.998887] kasan_save_track+0x18/0x40 [ 13.999192] kasan_save_free_info+0x3f/0x60 [ 13.999505] __kasan_slab_free+0x56/0x70 [ 13.999852] kfree+0x222/0x3f0 [ 14.000115] kasan_strings+0x2aa/0xe80 [ 14.000430] kunit_try_run_case+0x1a5/0x480 [ 14.000786] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.001180] kthread+0x337/0x6f0 [ 14.001375] ret_from_fork+0x41/0x80 [ 14.001586] ret_from_fork_asm+0x1a/0x30 [ 14.001923] [ 14.002094] The buggy address belongs to the object at ffff8881039efb00 [ 14.002094] which belongs to the cache kmalloc-32 of size 32 [ 14.002899] The buggy address is located 16 bytes inside of [ 14.002899] freed 32-byte region [ffff8881039efb00, ffff8881039efb20) [ 14.003385] [ 14.003497] The buggy address belongs to the physical page: [ 14.003850] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039ef [ 14.004401] flags: 0x200000000000000(node=0|zone=2) [ 14.004802] page_type: f5(slab) [ 14.005063] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.005577] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.005832] page dumped because: kasan: bad access detected [ 14.006033] [ 14.006134] Memory state around the buggy address: [ 14.006516] ffff8881039efa00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.007078] ffff8881039efa80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.007582] >ffff8881039efb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.008036] ^ [ 14.008248] ffff8881039efb80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.008655] ffff8881039efc00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.008998] ==================================================================