Date
July 23, 2025, 2:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.711806] ================================================================== [ 17.711880] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 17.713011] Read of size 1 at addr fff00000c3f8c510 by task kunit_try_catch/259 [ 17.713100] [ 17.713135] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 17.713291] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.713324] Hardware name: linux,dummy-virt (DT) [ 17.713384] Call trace: [ 17.713410] show_stack+0x20/0x38 (C) [ 17.713516] dump_stack_lvl+0x8c/0xd0 [ 17.713581] print_report+0x118/0x5d0 [ 17.713633] kasan_report+0xdc/0x128 [ 17.713721] __asan_report_load1_noabort+0x20/0x30 [ 17.714146] kasan_strings+0x95c/0xb00 [ 17.714214] kunit_try_run_case+0x170/0x3f0 [ 17.714266] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.714330] kthread+0x328/0x630 [ 17.714375] ret_from_fork+0x10/0x20 [ 17.714743] [ 17.714788] Allocated by task 259: [ 17.715170] kasan_save_stack+0x3c/0x68 [ 17.715294] kasan_save_track+0x20/0x40 [ 17.715360] kasan_save_alloc_info+0x40/0x58 [ 17.715565] __kasan_kmalloc+0xd4/0xd8 [ 17.715794] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.716043] kasan_strings+0xc8/0xb00 [ 17.716224] kunit_try_run_case+0x170/0x3f0 [ 17.716417] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.716686] kthread+0x328/0x630 [ 17.717025] ret_from_fork+0x10/0x20 [ 17.717233] [ 17.717309] Freed by task 259: [ 17.717375] kasan_save_stack+0x3c/0x68 [ 17.717480] kasan_save_track+0x20/0x40 [ 17.717683] kasan_save_free_info+0x4c/0x78 [ 17.717895] __kasan_slab_free+0x6c/0x98 [ 17.718201] kfree+0x214/0x3c8 [ 17.718409] kasan_strings+0x24c/0xb00 [ 17.718504] kunit_try_run_case+0x170/0x3f0 [ 17.718689] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.718901] kthread+0x328/0x630 [ 17.719047] ret_from_fork+0x10/0x20 [ 17.719166] [ 17.719209] The buggy address belongs to the object at fff00000c3f8c500 [ 17.719209] which belongs to the cache kmalloc-32 of size 32 [ 17.719403] The buggy address is located 16 bytes inside of [ 17.719403] freed 32-byte region [fff00000c3f8c500, fff00000c3f8c520) [ 17.719641] [ 17.719737] The buggy address belongs to the physical page: [ 17.719883] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f8c [ 17.719967] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.720272] page_type: f5(slab) [ 17.720463] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 17.720550] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 17.720759] page dumped because: kasan: bad access detected [ 17.720940] [ 17.720998] Memory state around the buggy address: [ 17.721101] fff00000c3f8c400: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.721412] fff00000c3f8c480: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.721691] >fff00000c3f8c500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.721786] ^ [ 17.721822] fff00000c3f8c580: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.722105] fff00000c3f8c600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.722461] ==================================================================
[ 14.504003] ================================================================== [ 14.504973] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 14.505696] Read of size 1 at addr ffff8881025e0a90 by task kunit_try_catch/276 [ 14.506231] [ 14.506338] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 14.506392] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.506405] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.506426] Call Trace: [ 14.506442] <TASK> [ 14.506457] dump_stack_lvl+0x73/0xb0 [ 14.506487] print_report+0xd1/0x610 [ 14.506509] ? __virt_addr_valid+0x1db/0x2d0 [ 14.506532] ? kasan_strings+0xcbc/0xe80 [ 14.506554] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.506576] ? kasan_strings+0xcbc/0xe80 [ 14.506597] kasan_report+0x141/0x180 [ 14.506618] ? kasan_strings+0xcbc/0xe80 [ 14.506644] __asan_report_load1_noabort+0x18/0x20 [ 14.506667] kasan_strings+0xcbc/0xe80 [ 14.506687] ? trace_hardirqs_on+0x37/0xe0 [ 14.506710] ? __pfx_kasan_strings+0x10/0x10 [ 14.506730] ? finish_task_switch.isra.0+0x153/0x700 [ 14.506753] ? __switch_to+0x47/0xf50 [ 14.506778] ? __schedule+0x10c6/0x2b60 [ 14.506800] ? __pfx_read_tsc+0x10/0x10 [ 14.506836] ? ktime_get_ts64+0x86/0x230 [ 14.506860] kunit_try_run_case+0x1a5/0x480 [ 14.506884] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.506906] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.506929] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.506953] ? __kthread_parkme+0x82/0x180 [ 14.506973] ? preempt_count_sub+0x50/0x80 [ 14.506996] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.507019] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.507042] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.507066] kthread+0x337/0x6f0 [ 14.507086] ? trace_preempt_on+0x20/0xc0 [ 14.507121] ? __pfx_kthread+0x10/0x10 [ 14.507141] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.507163] ? calculate_sigpending+0x7b/0xa0 [ 14.507186] ? __pfx_kthread+0x10/0x10 [ 14.507206] ret_from_fork+0x116/0x1d0 [ 14.507225] ? __pfx_kthread+0x10/0x10 [ 14.507245] ret_from_fork_asm+0x1a/0x30 [ 14.507275] </TASK> [ 14.507285] [ 14.516669] Allocated by task 276: [ 14.516867] kasan_save_stack+0x45/0x70 [ 14.517060] kasan_save_track+0x18/0x40 [ 14.517442] kasan_save_alloc_info+0x3b/0x50 [ 14.517717] __kasan_kmalloc+0xb7/0xc0 [ 14.517871] __kmalloc_cache_noprof+0x189/0x420 [ 14.518184] kasan_strings+0xc0/0xe80 [ 14.518344] kunit_try_run_case+0x1a5/0x480 [ 14.518558] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.518790] kthread+0x337/0x6f0 [ 14.518977] ret_from_fork+0x116/0x1d0 [ 14.519146] ret_from_fork_asm+0x1a/0x30 [ 14.519290] [ 14.519390] Freed by task 276: [ 14.519552] kasan_save_stack+0x45/0x70 [ 14.519726] kasan_save_track+0x18/0x40 [ 14.520468] kasan_save_free_info+0x3f/0x60 [ 14.520654] __kasan_slab_free+0x56/0x70 [ 14.520986] kfree+0x222/0x3f0 [ 14.521126] kasan_strings+0x2aa/0xe80 [ 14.521447] kunit_try_run_case+0x1a5/0x480 [ 14.521713] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.521920] kthread+0x337/0x6f0 [ 14.522089] ret_from_fork+0x116/0x1d0 [ 14.522438] ret_from_fork_asm+0x1a/0x30 [ 14.522638] [ 14.522795] The buggy address belongs to the object at ffff8881025e0a80 [ 14.522795] which belongs to the cache kmalloc-32 of size 32 [ 14.523469] The buggy address is located 16 bytes inside of [ 14.523469] freed 32-byte region [ffff8881025e0a80, ffff8881025e0aa0) [ 14.524104] [ 14.524366] The buggy address belongs to the physical page: [ 14.524588] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025e0 [ 14.525047] flags: 0x200000000000000(node=0|zone=2) [ 14.525386] page_type: f5(slab) [ 14.525517] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.526004] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.526369] page dumped because: kasan: bad access detected [ 14.526699] [ 14.526780] Memory state around the buggy address: [ 14.526987] ffff8881025e0980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.527489] ffff8881025e0a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.527858] >ffff8881025e0a80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.528153] ^ [ 14.528468] ffff8881025e0b00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.528733] ffff8881025e0b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.529173] ==================================================================