Date
July 1, 2025, 11:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.091761] ================================================================== [ 21.091841] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 21.091905] Read of size 1 at addr fff00000c76d9210 by task kunit_try_catch/260 [ 21.091964] [ 21.092306] CPU: 0 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 21.092821] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.092889] Hardware name: linux,dummy-virt (DT) [ 21.092928] Call trace: [ 21.093032] show_stack+0x20/0x38 (C) [ 21.093122] dump_stack_lvl+0x8c/0xd0 [ 21.093332] print_report+0x118/0x608 [ 21.093423] kasan_report+0xdc/0x128 [ 21.093726] __asan_report_load1_noabort+0x20/0x30 [ 21.093901] strlen+0xa8/0xb0 [ 21.094044] kasan_strings+0x418/0xb00 [ 21.094125] kunit_try_run_case+0x170/0x3f0 [ 21.094264] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.094343] kthread+0x328/0x630 [ 21.094393] ret_from_fork+0x10/0x20 [ 21.094478] [ 21.094804] Allocated by task 260: [ 21.094884] kasan_save_stack+0x3c/0x68 [ 21.094942] kasan_save_track+0x20/0x40 [ 21.095077] kasan_save_alloc_info+0x40/0x58 [ 21.095287] __kasan_kmalloc+0xd4/0xd8 [ 21.095370] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.095424] kasan_strings+0xc8/0xb00 [ 21.095706] kunit_try_run_case+0x170/0x3f0 [ 21.095872] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.095962] kthread+0x328/0x630 [ 21.096097] ret_from_fork+0x10/0x20 [ 21.096217] [ 21.096393] Freed by task 260: [ 21.096647] kasan_save_stack+0x3c/0x68 [ 21.096726] kasan_save_track+0x20/0x40 [ 21.096883] kasan_save_free_info+0x4c/0x78 [ 21.097020] __kasan_slab_free+0x6c/0x98 [ 21.097116] kfree+0x214/0x3c8 [ 21.097244] kasan_strings+0x24c/0xb00 [ 21.097291] kunit_try_run_case+0x170/0x3f0 [ 21.097352] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.097408] kthread+0x328/0x630 [ 21.097581] ret_from_fork+0x10/0x20 [ 21.097761] [ 21.097789] The buggy address belongs to the object at fff00000c76d9200 [ 21.097789] which belongs to the cache kmalloc-32 of size 32 [ 21.097865] The buggy address is located 16 bytes inside of [ 21.097865] freed 32-byte region [fff00000c76d9200, fff00000c76d9220) [ 21.098043] [ 21.098082] The buggy address belongs to the physical page: [ 21.098122] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1076d9 [ 21.098211] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.098285] page_type: f5(slab) [ 21.098333] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.098404] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.098469] page dumped because: kasan: bad access detected [ 21.098509] [ 21.098531] Memory state around the buggy address: [ 21.098572] fff00000c76d9100: 00 00 00 fc fc fc fc fc 00 00 00 04 fc fc fc fc [ 21.098634] fff00000c76d9180: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.098687] >fff00000c76d9200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.098736] ^ [ 21.098783] fff00000c76d9280: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.098844] fff00000c76d9300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.098906] ==================================================================
[ 13.470427] ================================================================== [ 13.471219] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 13.471497] Read of size 1 at addr ffff888103aaf390 by task kunit_try_catch/276 [ 13.471801] [ 13.471897] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.471944] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.471956] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.471978] Call Trace: [ 13.471997] <TASK> [ 13.472017] dump_stack_lvl+0x73/0xb0 [ 13.472045] print_report+0xd1/0x650 [ 13.472069] ? __virt_addr_valid+0x1db/0x2d0 [ 13.472092] ? strlen+0x8f/0xb0 [ 13.472108] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.472130] ? strlen+0x8f/0xb0 [ 13.472147] kasan_report+0x141/0x180 [ 13.472168] ? strlen+0x8f/0xb0 [ 13.472188] __asan_report_load1_noabort+0x18/0x20 [ 13.472212] strlen+0x8f/0xb0 [ 13.472229] kasan_strings+0x57b/0xe80 [ 13.472248] ? trace_hardirqs_on+0x37/0xe0 [ 13.472271] ? __pfx_kasan_strings+0x10/0x10 [ 13.472289] ? finish_task_switch.isra.0+0x153/0x700 [ 13.472312] ? __switch_to+0x47/0xf50 [ 13.472337] ? __schedule+0x10cc/0x2b60 [ 13.472360] ? __pfx_read_tsc+0x10/0x10 [ 13.472391] ? ktime_get_ts64+0x86/0x230 [ 13.472419] kunit_try_run_case+0x1a5/0x480 [ 13.472443] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.472465] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.472489] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.472511] ? __kthread_parkme+0x82/0x180 [ 13.472531] ? preempt_count_sub+0x50/0x80 [ 13.472554] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.472589] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.472612] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.472635] kthread+0x337/0x6f0 [ 13.472654] ? trace_preempt_on+0x20/0xc0 [ 13.472675] ? __pfx_kthread+0x10/0x10 [ 13.472695] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.472715] ? calculate_sigpending+0x7b/0xa0 [ 13.472738] ? __pfx_kthread+0x10/0x10 [ 13.472759] ret_from_fork+0x116/0x1d0 [ 13.472777] ? __pfx_kthread+0x10/0x10 [ 13.472796] ret_from_fork_asm+0x1a/0x30 [ 13.472825] </TASK> [ 13.472836] [ 13.479810] Allocated by task 276: [ 13.479971] kasan_save_stack+0x45/0x70 [ 13.480166] kasan_save_track+0x18/0x40 [ 13.480352] kasan_save_alloc_info+0x3b/0x50 [ 13.480571] __kasan_kmalloc+0xb7/0xc0 [ 13.480753] __kmalloc_cache_noprof+0x189/0x420 [ 13.480970] kasan_strings+0xc0/0xe80 [ 13.481135] kunit_try_run_case+0x1a5/0x480 [ 13.481278] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.481494] kthread+0x337/0x6f0 [ 13.481821] ret_from_fork+0x116/0x1d0 [ 13.482002] ret_from_fork_asm+0x1a/0x30 [ 13.482194] [ 13.482287] Freed by task 276: [ 13.482422] kasan_save_stack+0x45/0x70 [ 13.482559] kasan_save_track+0x18/0x40 [ 13.482757] kasan_save_free_info+0x3f/0x60 [ 13.482955] __kasan_slab_free+0x56/0x70 [ 13.483133] kfree+0x222/0x3f0 [ 13.483273] kasan_strings+0x2aa/0xe80 [ 13.483443] kunit_try_run_case+0x1a5/0x480 [ 13.483656] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.483828] kthread+0x337/0x6f0 [ 13.483985] ret_from_fork+0x116/0x1d0 [ 13.484171] ret_from_fork_asm+0x1a/0x30 [ 13.484363] [ 13.484471] The buggy address belongs to the object at ffff888103aaf380 [ 13.484471] which belongs to the cache kmalloc-32 of size 32 [ 13.484984] The buggy address is located 16 bytes inside of [ 13.484984] freed 32-byte region [ffff888103aaf380, ffff888103aaf3a0) [ 13.485415] [ 13.485517] The buggy address belongs to the physical page: [ 13.485795] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103aaf [ 13.486127] flags: 0x200000000000000(node=0|zone=2) [ 13.486311] page_type: f5(slab) [ 13.486476] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.486885] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.487166] page dumped because: kasan: bad access detected [ 13.487426] [ 13.487511] Memory state around the buggy address: [ 13.487750] ffff888103aaf280: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 13.488042] ffff888103aaf300: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.488332] >ffff888103aaf380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.488589] ^ [ 13.488771] ffff888103aaf400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.489025] ffff888103aaf480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.489317] ==================================================================