Date
June 5, 2025, 7:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 28.774571] ================================================================== [ 28.774700] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 28.774819] Read of size 1 at addr fff00000c770c050 by task kunit_try_catch/259 [ 28.774949] [ 28.775028] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250605 #1 PREEMPT [ 28.775866] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.776034] Hardware name: linux,dummy-virt (DT) [ 28.776107] Call trace: [ 28.776141] show_stack+0x20/0x38 (C) [ 28.776218] dump_stack_lvl+0x8c/0xd0 [ 28.776358] print_report+0x118/0x608 [ 28.776695] kasan_report+0xdc/0x128 [ 28.776821] __asan_report_load1_noabort+0x20/0x30 [ 28.776971] strcmp+0xc0/0xc8 [ 28.777124] kasan_strings+0x340/0xb00 [ 28.777504] kunit_try_run_case+0x170/0x3f0 [ 28.777646] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.778154] kthread+0x328/0x630 [ 28.778295] ret_from_fork+0x10/0x20 [ 28.779178] [ 28.779268] Allocated by task 259: [ 28.779594] kasan_save_stack+0x3c/0x68 [ 28.779927] kasan_save_track+0x20/0x40 [ 28.780068] kasan_save_alloc_info+0x40/0x58 [ 28.780187] __kasan_kmalloc+0xd4/0xd8 [ 28.780785] __kmalloc_cache_noprof+0x16c/0x3c0 [ 28.780896] kasan_strings+0xc8/0xb00 [ 28.780959] kunit_try_run_case+0x170/0x3f0 [ 28.781011] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.781111] kthread+0x328/0x630 [ 28.781221] ret_from_fork+0x10/0x20 [ 28.781355] [ 28.781468] Freed by task 259: [ 28.781645] kasan_save_stack+0x3c/0x68 [ 28.781752] kasan_save_track+0x20/0x40 [ 28.781855] kasan_save_free_info+0x4c/0x78 [ 28.782278] __kasan_slab_free+0x6c/0x98 [ 28.782463] kfree+0x214/0x3c8 [ 28.782581] kasan_strings+0x24c/0xb00 [ 28.782765] kunit_try_run_case+0x170/0x3f0 [ 28.782885] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.783005] kthread+0x328/0x630 [ 28.783117] ret_from_fork+0x10/0x20 [ 28.783217] [ 28.783272] The buggy address belongs to the object at fff00000c770c040 [ 28.783272] which belongs to the cache kmalloc-32 of size 32 [ 28.783461] The buggy address is located 16 bytes inside of [ 28.783461] freed 32-byte region [fff00000c770c040, fff00000c770c060) [ 28.783652] [ 28.783705] The buggy address belongs to the physical page: [ 28.783790] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10770c [ 28.783950] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 28.784278] page_type: f5(slab) [ 28.785115] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 28.785255] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 28.787544] page dumped because: kasan: bad access detected [ 28.790505] [ 28.790567] Memory state around the buggy address: [ 28.790649] fff00000c770bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.790762] fff00000c770bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.790886] >fff00000c770c000: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 28.790989] ^ [ 28.791085] fff00000c770c080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.791196] fff00000c770c100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 28.791297] ==================================================================
[ 13.318882] ================================================================== [ 13.319941] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 13.320424] Read of size 1 at addr ffff88810278df50 by task kunit_try_catch/276 [ 13.320775] [ 13.320873] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250605 #1 PREEMPT(voluntary) [ 13.320935] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.320947] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.320969] Call Trace: [ 13.320979] <TASK> [ 13.320995] dump_stack_lvl+0x73/0xb0 [ 13.321020] print_report+0xd1/0x650 [ 13.321105] ? __virt_addr_valid+0x1db/0x2d0 [ 13.321132] ? strcmp+0xb0/0xc0 [ 13.321150] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.321174] ? strcmp+0xb0/0xc0 [ 13.321193] kasan_report+0x141/0x180 [ 13.321215] ? strcmp+0xb0/0xc0 [ 13.321237] __asan_report_load1_noabort+0x18/0x20 [ 13.321262] strcmp+0xb0/0xc0 [ 13.321281] kasan_strings+0x431/0xe80 [ 13.321300] ? trace_hardirqs_on+0x37/0xe0 [ 13.321324] ? __pfx_kasan_strings+0x10/0x10 [ 13.321344] ? finish_task_switch.isra.0+0x153/0x700 [ 13.321366] ? __switch_to+0x47/0xf50 [ 13.321392] ? __schedule+0x10cc/0x2b60 [ 13.321415] ? __pfx_read_tsc+0x10/0x10 [ 13.321436] ? ktime_get_ts64+0x86/0x230 [ 13.321460] kunit_try_run_case+0x1a5/0x480 [ 13.321482] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.321501] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.321526] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.321550] ? __kthread_parkme+0x82/0x180 [ 13.321570] ? preempt_count_sub+0x50/0x80 [ 13.321592] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.321614] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.321638] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.321663] kthread+0x337/0x6f0 [ 13.321682] ? trace_preempt_on+0x20/0xc0 [ 13.321712] ? __pfx_kthread+0x10/0x10 [ 13.321731] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.321754] ? calculate_sigpending+0x7b/0xa0 [ 13.321777] ? __pfx_kthread+0x10/0x10 [ 13.321798] ret_from_fork+0x116/0x1d0 [ 13.321816] ? __pfx_kthread+0x10/0x10 [ 13.321836] ret_from_fork_asm+0x1a/0x30 [ 13.321866] </TASK> [ 13.321877] [ 13.329912] Allocated by task 276: [ 13.330134] kasan_save_stack+0x45/0x70 [ 13.330342] kasan_save_track+0x18/0x40 [ 13.330515] kasan_save_alloc_info+0x3b/0x50 [ 13.330682] __kasan_kmalloc+0xb7/0xc0 [ 13.330880] __kmalloc_cache_noprof+0x189/0x420 [ 13.331303] kasan_strings+0xc0/0xe80 [ 13.331479] kunit_try_run_case+0x1a5/0x480 [ 13.331689] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.331873] kthread+0x337/0x6f0 [ 13.332166] ret_from_fork+0x116/0x1d0 [ 13.332354] ret_from_fork_asm+0x1a/0x30 [ 13.332680] [ 13.332764] Freed by task 276: [ 13.332875] kasan_save_stack+0x45/0x70 [ 13.333192] kasan_save_track+0x18/0x40 [ 13.333437] kasan_save_free_info+0x3f/0x60 [ 13.333617] __kasan_slab_free+0x56/0x70 [ 13.333788] kfree+0x222/0x3f0 [ 13.333968] kasan_strings+0x2aa/0xe80 [ 13.334122] kunit_try_run_case+0x1a5/0x480 [ 13.334330] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.334532] kthread+0x337/0x6f0 [ 13.334650] ret_from_fork+0x116/0x1d0 [ 13.334782] ret_from_fork_asm+0x1a/0x30 [ 13.334928] [ 13.334998] The buggy address belongs to the object at ffff88810278df40 [ 13.334998] which belongs to the cache kmalloc-32 of size 32 [ 13.335449] The buggy address is located 16 bytes inside of [ 13.335449] freed 32-byte region [ffff88810278df40, ffff88810278df60) [ 13.336513] [ 13.336589] The buggy address belongs to the physical page: [ 13.336760] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10278d [ 13.337014] flags: 0x200000000000000(node=0|zone=2) [ 13.337180] page_type: f5(slab) [ 13.337395] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.337907] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 13.338323] page dumped because: kasan: bad access detected [ 13.338575] [ 13.338707] Memory state around the buggy address: [ 13.339158] ffff88810278de00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.339403] ffff88810278de80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.339777] >ffff88810278df00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.340004] ^ [ 13.340522] ffff88810278df80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.340871] ffff88810278e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.341242] ==================================================================