Date
July 23, 2025, 3:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.813094] ================================================================== [ 32.813151] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 32.813206] Read of size 1 at addr fff00000c9c2cc50 by task kunit_try_catch/292 [ 32.813258] [ 32.813293] CPU: 1 UID: 0 PID: 292 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250723 #1 PREEMPT [ 32.813401] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 32.813434] Hardware name: linux,dummy-virt (DT) [ 32.813478] Call trace: [ 32.813514] show_stack+0x20/0x38 (C) [ 32.813580] dump_stack_lvl+0x8c/0xd0 [ 32.813637] print_report+0x118/0x5e8 [ 32.813683] kasan_report+0xdc/0x128 [ 32.813733] __asan_report_load1_noabort+0x20/0x30 [ 32.813791] strcmp+0xc0/0xc8 [ 32.813837] kasan_strings+0x340/0xb00 [ 32.813891] kunit_try_run_case+0x170/0x3f0 [ 32.813955] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.814008] kthread+0x328/0x630 [ 32.814050] ret_from_fork+0x10/0x20 [ 32.814099] [ 32.814119] Allocated by task 292: [ 32.814149] kasan_save_stack+0x3c/0x68 [ 32.814190] kasan_save_track+0x20/0x40 [ 32.814227] kasan_save_alloc_info+0x40/0x58 [ 32.814267] __kasan_kmalloc+0xd4/0xd8 [ 32.814318] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.814365] kasan_strings+0xc8/0xb00 [ 32.814404] kunit_try_run_case+0x170/0x3f0 [ 32.814442] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.814515] kthread+0x328/0x630 [ 32.814550] ret_from_fork+0x10/0x20 [ 32.814588] [ 32.814914] Freed by task 292: [ 32.814943] kasan_save_stack+0x3c/0x68 [ 32.814980] kasan_save_track+0x20/0x40 [ 32.815017] kasan_save_free_info+0x4c/0x78 [ 32.815056] __kasan_slab_free+0x6c/0x98 [ 32.815093] kfree+0x214/0x3c8 [ 32.815129] kasan_strings+0x24c/0xb00 [ 32.815169] kunit_try_run_case+0x170/0x3f0 [ 32.815207] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.815250] kthread+0x328/0x630 [ 32.815285] ret_from_fork+0x10/0x20 [ 32.815323] [ 32.815344] The buggy address belongs to the object at fff00000c9c2cc40 [ 32.815344] which belongs to the cache kmalloc-32 of size 32 [ 32.815427] The buggy address is located 16 bytes inside of [ 32.815427] freed 32-byte region [fff00000c9c2cc40, fff00000c9c2cc60) [ 32.815520] [ 32.815567] The buggy address belongs to the physical page: [ 32.815614] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109c2c [ 32.815702] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.815765] page_type: f5(slab) [ 32.815841] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 32.815972] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 32.816062] page dumped because: kasan: bad access detected [ 32.816148] [ 32.816168] Memory state around the buggy address: [ 32.816219] fff00000c9c2cb00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 32.816550] fff00000c9c2cb80: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 32.816631] >fff00000c9c2cc00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 32.816754] ^ [ 32.816823] fff00000c9c2cc80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.816946] fff00000c9c2cd00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.817045] ==================================================================
[ 27.205689] ================================================================== [ 27.207192] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 27.207410] Read of size 1 at addr ffff8881060ae110 by task kunit_try_catch/308 [ 27.207930] [ 27.208382] CPU: 1 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250723 #1 PREEMPT(voluntary) [ 27.208563] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.208583] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.208608] Call Trace: [ 27.208635] <TASK> [ 27.208655] dump_stack_lvl+0x73/0xb0 [ 27.208695] print_report+0xd1/0x640 [ 27.208720] ? __virt_addr_valid+0x1db/0x2d0 [ 27.208745] ? strcmp+0xb0/0xc0 [ 27.208766] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.208794] ? strcmp+0xb0/0xc0 [ 27.208814] kasan_report+0x141/0x180 [ 27.208835] ? strcmp+0xb0/0xc0 [ 27.208860] __asan_report_load1_noabort+0x18/0x20 [ 27.208886] strcmp+0xb0/0xc0 [ 27.208906] kasan_strings+0x431/0xe80 [ 27.208927] ? trace_hardirqs_on+0x37/0xe0 [ 27.208984] ? __pfx_kasan_strings+0x10/0x10 [ 27.209006] ? finish_task_switch.isra.0+0x153/0x700 [ 27.209027] ? __switch_to+0x47/0xf80 [ 27.209056] ? __schedule+0x10da/0x2b60 [ 27.209080] ? __pfx_read_tsc+0x10/0x10 [ 27.209103] ? ktime_get_ts64+0x86/0x230 [ 27.209128] kunit_try_run_case+0x1a5/0x480 [ 27.209165] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.209187] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.209213] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.209238] ? __kthread_parkme+0x82/0x180 [ 27.209258] ? preempt_count_sub+0x50/0x80 [ 27.209281] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.209304] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.209328] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.209351] kthread+0x337/0x6f0 [ 27.209380] ? trace_preempt_on+0x20/0xc0 [ 27.209402] ? __pfx_kthread+0x10/0x10 [ 27.209423] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.209448] ? calculate_sigpending+0x7b/0xa0 [ 27.209472] ? __pfx_kthread+0x10/0x10 [ 27.209493] ret_from_fork+0x116/0x1d0 [ 27.209513] ? __pfx_kthread+0x10/0x10 [ 27.209533] ret_from_fork_asm+0x1a/0x30 [ 27.209565] </TASK> [ 27.209577] [ 27.226267] Allocated by task 308: [ 27.226642] kasan_save_stack+0x45/0x70 [ 27.227070] kasan_save_track+0x18/0x40 [ 27.227558] kasan_save_alloc_info+0x3b/0x50 [ 27.228000] __kasan_kmalloc+0xb7/0xc0 [ 27.228138] __kmalloc_cache_noprof+0x189/0x420 [ 27.228303] kasan_strings+0xc0/0xe80 [ 27.228641] kunit_try_run_case+0x1a5/0x480 [ 27.229071] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.229610] kthread+0x337/0x6f0 [ 27.230110] ret_from_fork+0x116/0x1d0 [ 27.230540] ret_from_fork_asm+0x1a/0x30 [ 27.230780] [ 27.230847] Freed by task 308: [ 27.230958] kasan_save_stack+0x45/0x70 [ 27.231176] kasan_save_track+0x18/0x40 [ 27.231652] kasan_save_free_info+0x3f/0x60 [ 27.232073] __kasan_slab_free+0x56/0x70 [ 27.232439] kfree+0x222/0x3f0 [ 27.232786] kasan_strings+0x2aa/0xe80 [ 27.233226] kunit_try_run_case+0x1a5/0x480 [ 27.233370] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.234100] kthread+0x337/0x6f0 [ 27.234441] ret_from_fork+0x116/0x1d0 [ 27.234891] ret_from_fork_asm+0x1a/0x30 [ 27.235221] [ 27.235322] The buggy address belongs to the object at ffff8881060ae100 [ 27.235322] which belongs to the cache kmalloc-32 of size 32 [ 27.236321] The buggy address is located 16 bytes inside of [ 27.236321] freed 32-byte region [ffff8881060ae100, ffff8881060ae120) [ 27.237099] [ 27.237266] The buggy address belongs to the physical page: [ 27.237654] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1060ae [ 27.238159] flags: 0x200000000000000(node=0|zone=2) [ 27.238337] page_type: f5(slab) [ 27.238649] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 27.239401] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 27.240220] page dumped because: kasan: bad access detected [ 27.240734] [ 27.240884] Memory state around the buggy address: [ 27.241109] ffff8881060ae000: 00 00 00 04 fc fc fc fc 00 00 07 fc fc fc fc fc [ 27.241915] ffff8881060ae080: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.242307] >ffff8881060ae100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.242644] ^ [ 27.243009] ffff8881060ae180: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.243799] ffff8881060ae200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.244461] ==================================================================