Date
May 26, 2025, 9:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.305104] ================================================================== [ 20.305231] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 20.306739] Read of size 1 at addr fff00000c7896b90 by task kunit_try_catch/259 [ 20.307164] [ 20.309234] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7-next-20250526 #1 PREEMPT [ 20.310826] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.311007] Hardware name: linux,dummy-virt (DT) [ 20.311176] Call trace: [ 20.311226] show_stack+0x20/0x38 (C) [ 20.311505] dump_stack_lvl+0x8c/0xd0 [ 20.311725] print_report+0x118/0x608 [ 20.311838] kasan_report+0xdc/0x128 [ 20.311949] __asan_report_load1_noabort+0x20/0x30 [ 20.312071] strcmp+0xc0/0xc8 [ 20.312171] kasan_strings+0x340/0xb00 [ 20.312271] kunit_try_run_case+0x170/0x3f0 [ 20.314015] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.314972] kthread+0x328/0x630 [ 20.315085] ret_from_fork+0x10/0x20 [ 20.315419] [ 20.315469] Allocated by task 259: [ 20.315520] kasan_save_stack+0x3c/0x68 [ 20.315575] kasan_save_track+0x20/0x40 [ 20.315618] kasan_save_alloc_info+0x40/0x58 [ 20.315746] __kasan_kmalloc+0xd4/0xd8 [ 20.316072] __kmalloc_cache_noprof+0x15c/0x3c0 [ 20.316183] kasan_strings+0xc8/0xb00 [ 20.316291] kunit_try_run_case+0x170/0x3f0 [ 20.316394] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.316580] kthread+0x328/0x630 [ 20.316698] ret_from_fork+0x10/0x20 [ 20.316867] [ 20.316958] Freed by task 259: [ 20.317041] kasan_save_stack+0x3c/0x68 [ 20.317191] kasan_save_track+0x20/0x40 [ 20.317326] kasan_save_free_info+0x4c/0x78 [ 20.317722] __kasan_slab_free+0x6c/0x98 [ 20.317841] kfree+0x214/0x3c8 [ 20.317928] kasan_strings+0x24c/0xb00 [ 20.318013] kunit_try_run_case+0x170/0x3f0 [ 20.318333] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.318495] kthread+0x328/0x630 [ 20.318579] ret_from_fork+0x10/0x20 [ 20.318694] [ 20.318746] The buggy address belongs to the object at fff00000c7896b80 [ 20.318746] which belongs to the cache kmalloc-32 of size 32 [ 20.318923] The buggy address is located 16 bytes inside of [ 20.318923] freed 32-byte region [fff00000c7896b80, fff00000c7896ba0) [ 20.319071] [ 20.319142] The buggy address belongs to the physical page: [ 20.319248] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107896 [ 20.319366] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.319468] page_type: f5(slab) [ 20.319559] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.319676] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.319774] page dumped because: kasan: bad access detected [ 20.319848] [ 20.319892] Memory state around the buggy address: [ 20.319967] fff00000c7896a80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.320070] fff00000c7896b00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.320171] >fff00000c7896b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.320262] ^ [ 20.320343] fff00000c7896c00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.320444] fff00000c7896c80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.320551] ==================================================================
[ 12.931711] ================================================================== [ 12.933247] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 12.933546] Read of size 1 at addr ffff8881039b9850 by task kunit_try_catch/277 [ 12.934041] [ 12.934397] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7-next-20250526 #1 PREEMPT(voluntary) [ 12.934449] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.934462] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.934484] Call Trace: [ 12.934497] <TASK> [ 12.934514] dump_stack_lvl+0x73/0xb0 [ 12.934543] print_report+0xd1/0x650 [ 12.934568] ? __virt_addr_valid+0x1db/0x2d0 [ 12.934591] ? strcmp+0xb0/0xc0 [ 12.934610] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.934634] ? strcmp+0xb0/0xc0 [ 12.934652] kasan_report+0x141/0x180 [ 12.934676] ? strcmp+0xb0/0xc0 [ 12.934699] __asan_report_load1_noabort+0x18/0x20 [ 12.934914] strcmp+0xb0/0xc0 [ 12.934939] kasan_strings+0x431/0xe80 [ 12.934960] ? trace_hardirqs_on+0x37/0xe0 [ 12.934999] ? __pfx_kasan_strings+0x10/0x10 [ 12.935024] ? finish_task_switch.isra.0+0x153/0x700 [ 12.935047] ? __switch_to+0x47/0xf50 [ 12.935074] ? __schedule+0x10cc/0x2b60 [ 12.935100] ? __pfx_read_tsc+0x10/0x10 [ 12.935122] ? ktime_get_ts64+0x86/0x230 [ 12.935147] kunit_try_run_case+0x1a5/0x480 [ 12.935169] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.935189] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.935214] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.935240] ? __kthread_parkme+0x82/0x180 [ 12.935259] ? preempt_count_sub+0x50/0x80 [ 12.935282] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.935302] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.935327] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.935352] kthread+0x337/0x6f0 [ 12.935371] ? trace_preempt_on+0x20/0xc0 [ 12.935402] ? __pfx_kthread+0x10/0x10 [ 12.935422] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.935445] ? calculate_sigpending+0x7b/0xa0 [ 12.935469] ? __pfx_kthread+0x10/0x10 [ 12.935491] ret_from_fork+0x116/0x1d0 [ 12.935510] ? __pfx_kthread+0x10/0x10 [ 12.935530] ret_from_fork_asm+0x1a/0x30 [ 12.935560] </TASK> [ 12.935571] [ 12.946186] Allocated by task 277: [ 12.946346] kasan_save_stack+0x45/0x70 [ 12.946559] kasan_save_track+0x18/0x40 [ 12.947096] kasan_save_alloc_info+0x3b/0x50 [ 12.947430] __kasan_kmalloc+0xb7/0xc0 [ 12.947582] __kmalloc_cache_noprof+0x189/0x420 [ 12.947945] kasan_strings+0xc0/0xe80 [ 12.948341] kunit_try_run_case+0x1a5/0x480 [ 12.948654] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.948900] kthread+0x337/0x6f0 [ 12.949259] ret_from_fork+0x116/0x1d0 [ 12.949479] ret_from_fork_asm+0x1a/0x30 [ 12.949802] [ 12.949903] Freed by task 277: [ 12.950050] kasan_save_stack+0x45/0x70 [ 12.950251] kasan_save_track+0x18/0x40 [ 12.950460] kasan_save_free_info+0x3f/0x60 [ 12.950641] __kasan_slab_free+0x56/0x70 [ 12.950875] kfree+0x222/0x3f0 [ 12.951389] kasan_strings+0x2aa/0xe80 [ 12.951567] kunit_try_run_case+0x1a5/0x480 [ 12.951929] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.952294] kthread+0x337/0x6f0 [ 12.952488] ret_from_fork+0x116/0x1d0 [ 12.952819] ret_from_fork_asm+0x1a/0x30 [ 12.953204] [ 12.953310] The buggy address belongs to the object at ffff8881039b9840 [ 12.953310] which belongs to the cache kmalloc-32 of size 32 [ 12.953926] The buggy address is located 16 bytes inside of [ 12.953926] freed 32-byte region [ffff8881039b9840, ffff8881039b9860) [ 12.954621] [ 12.954721] The buggy address belongs to the physical page: [ 12.955134] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039b9 [ 12.955482] flags: 0x200000000000000(node=0|zone=2) [ 12.955699] page_type: f5(slab) [ 12.956236] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.956551] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.957022] page dumped because: kasan: bad access detected [ 12.957357] [ 12.957473] Memory state around the buggy address: [ 12.957692] ffff8881039b9700: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 12.958324] ffff8881039b9780: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 12.958709] >ffff8881039b9800: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 12.959117] ^ [ 12.959540] ffff8881039b9880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.959869] ffff8881039b9900: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 12.960419] ==================================================================