Date
June 3, 2025, 7:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.709372] ================================================================== [ 20.709455] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 20.709725] Read of size 1 at addr fff00000c58ba050 by task kunit_try_catch/259 [ 20.709824] [ 20.709961] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT [ 20.710300] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.710359] Hardware name: linux,dummy-virt (DT) [ 20.710451] Call trace: [ 20.710474] show_stack+0x20/0x38 (C) [ 20.710615] dump_stack_lvl+0x8c/0xd0 [ 20.710972] print_report+0x118/0x608 [ 20.711027] kasan_report+0xdc/0x128 [ 20.711073] __asan_report_load1_noabort+0x20/0x30 [ 20.711123] kasan_strings+0x95c/0xb00 [ 20.711643] kunit_try_run_case+0x170/0x3f0 [ 20.712063] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.712216] kthread+0x328/0x630 [ 20.712262] ret_from_fork+0x10/0x20 [ 20.712526] [ 20.712652] Allocated by task 259: [ 20.712695] kasan_save_stack+0x3c/0x68 [ 20.712741] kasan_save_track+0x20/0x40 [ 20.712781] kasan_save_alloc_info+0x40/0x58 [ 20.712825] __kasan_kmalloc+0xd4/0xd8 [ 20.712873] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.712914] kasan_strings+0xc8/0xb00 [ 20.713141] kunit_try_run_case+0x170/0x3f0 [ 20.713397] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.713785] kthread+0x328/0x630 [ 20.713825] ret_from_fork+0x10/0x20 [ 20.714021] [ 20.714262] Freed by task 259: [ 20.714358] kasan_save_stack+0x3c/0x68 [ 20.714463] kasan_save_track+0x20/0x40 [ 20.714558] kasan_save_free_info+0x4c/0x78 [ 20.714604] __kasan_slab_free+0x6c/0x98 [ 20.714644] kfree+0x214/0x3c8 [ 20.714678] kasan_strings+0x24c/0xb00 [ 20.714718] kunit_try_run_case+0x170/0x3f0 [ 20.714759] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.714806] kthread+0x328/0x630 [ 20.714851] ret_from_fork+0x10/0x20 [ 20.714891] [ 20.714912] The buggy address belongs to the object at fff00000c58ba040 [ 20.714912] which belongs to the cache kmalloc-32 of size 32 [ 20.715347] The buggy address is located 16 bytes inside of [ 20.715347] freed 32-byte region [fff00000c58ba040, fff00000c58ba060) [ 20.715580] [ 20.715605] The buggy address belongs to the physical page: [ 20.715768] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058ba [ 20.715835] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.715997] page_type: f5(slab) [ 20.716208] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.716495] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.716546] page dumped because: kasan: bad access detected [ 20.716583] [ 20.716642] Memory state around the buggy address: [ 20.716782] fff00000c58b9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 20.716853] fff00000c58b9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 20.716905] >fff00000c58ba000: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.717107] ^ [ 20.717149] fff00000c58ba080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.717248] fff00000c58ba100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.717415] ==================================================================
[ 16.846065] ================================================================== [ 16.846690] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 16.847774] Read of size 1 at addr ffff888103349910 by task kunit_try_catch/276 [ 16.848558] [ 16.848665] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT(voluntary) [ 16.848725] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.848740] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.848765] Call Trace: [ 16.848789] <TASK> [ 16.848814] dump_stack_lvl+0x73/0xb0 [ 16.848854] print_report+0xd1/0x650 [ 16.848880] ? __virt_addr_valid+0x1db/0x2d0 [ 16.849041] ? kasan_strings+0xcbc/0xe80 [ 16.849064] ? kasan_complete_mode_report_info+0x64/0x200 [ 16.849088] ? kasan_strings+0xcbc/0xe80 [ 16.849111] kasan_report+0x141/0x180 [ 16.849134] ? kasan_strings+0xcbc/0xe80 [ 16.849163] __asan_report_load1_noabort+0x18/0x20 [ 16.849186] kasan_strings+0xcbc/0xe80 [ 16.849537] ? trace_hardirqs_on+0x37/0xe0 [ 16.849580] ? __pfx_kasan_strings+0x10/0x10 [ 16.849604] ? finish_task_switch.isra.0+0x153/0x700 [ 16.849630] ? __switch_to+0x47/0xf50 [ 16.849657] ? __schedule+0x10cc/0x2b60 [ 16.849684] ? __pfx_read_tsc+0x10/0x10 [ 16.849796] ? ktime_get_ts64+0x86/0x230 [ 16.849826] kunit_try_run_case+0x1a5/0x480 [ 16.849852] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.849873] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.849899] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.849926] ? __kthread_parkme+0x82/0x180 [ 16.849948] ? preempt_count_sub+0x50/0x80 [ 16.849973] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.849995] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.850021] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.850047] kthread+0x337/0x6f0 [ 16.850069] ? trace_preempt_on+0x20/0xc0 [ 16.850093] ? __pfx_kthread+0x10/0x10 [ 16.850116] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.850139] ? calculate_sigpending+0x7b/0xa0 [ 16.850166] ? __pfx_kthread+0x10/0x10 [ 16.850190] ret_from_fork+0x116/0x1d0 [ 16.850210] ? __pfx_kthread+0x10/0x10 [ 16.850232] ret_from_fork_asm+0x1a/0x30 [ 16.850267] </TASK> [ 16.850280] [ 16.860805] Allocated by task 276: [ 16.861742] kasan_save_stack+0x45/0x70 [ 16.862110] kasan_save_track+0x18/0x40 [ 16.862872] kasan_save_alloc_info+0x3b/0x50 [ 16.863166] __kasan_kmalloc+0xb7/0xc0 [ 16.863787] __kmalloc_cache_noprof+0x189/0x420 [ 16.864369] kasan_strings+0xc0/0xe80 [ 16.864571] kunit_try_run_case+0x1a5/0x480 [ 16.864692] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.864827] kthread+0x337/0x6f0 [ 16.864927] ret_from_fork+0x116/0x1d0 [ 16.865033] ret_from_fork_asm+0x1a/0x30 [ 16.865156] [ 16.865220] Freed by task 276: [ 16.865309] kasan_save_stack+0x45/0x70 [ 16.865413] kasan_save_track+0x18/0x40 [ 16.865612] kasan_save_free_info+0x3f/0x60 [ 16.865834] __kasan_slab_free+0x56/0x70 [ 16.866037] kfree+0x222/0x3f0 [ 16.866467] kasan_strings+0x2aa/0xe80 [ 16.867067] kunit_try_run_case+0x1a5/0x480 [ 16.867676] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.868290] kthread+0x337/0x6f0 [ 16.868442] ret_from_fork+0x116/0x1d0 [ 16.868636] ret_from_fork_asm+0x1a/0x30 [ 16.868998] [ 16.869288] The buggy address belongs to the object at ffff888103349900 [ 16.869288] which belongs to the cache kmalloc-32 of size 32 [ 16.870363] The buggy address is located 16 bytes inside of [ 16.870363] freed 32-byte region [ffff888103349900, ffff888103349920) [ 16.870907] [ 16.871099] The buggy address belongs to the physical page: [ 16.871491] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103349 [ 16.872086] flags: 0x200000000000000(node=0|zone=2) [ 16.872224] page_type: f5(slab) [ 16.872493] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 16.872949] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 16.873245] page dumped because: kasan: bad access detected [ 16.873541] [ 16.874031] Memory state around the buggy address: [ 16.874203] ffff888103349800: 00 00 00 04 fc fc fc fc fa fb fb fb fc fc fc fc [ 16.874506] ffff888103349880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 16.874814] >ffff888103349900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 16.875478] ^ [ 16.875780] ffff888103349980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 16.876014] ffff888103349a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 16.876367] ==================================================================