Date
July 1, 2025, 11:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.065241] ================================================================== [ 21.065453] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 21.065540] Read of size 1 at addr fff00000c76d9210 by task kunit_try_catch/260 [ 21.065823] [ 21.065972] CPU: 0 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 21.066355] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.066416] Hardware name: linux,dummy-virt (DT) [ 21.066464] Call trace: [ 21.066499] show_stack+0x20/0x38 (C) [ 21.066971] dump_stack_lvl+0x8c/0xd0 [ 21.067063] print_report+0x118/0x608 [ 21.067211] kasan_report+0xdc/0x128 [ 21.067426] __asan_report_load1_noabort+0x20/0x30 [ 21.067492] strcmp+0xc0/0xc8 [ 21.067539] kasan_strings+0x340/0xb00 [ 21.067588] kunit_try_run_case+0x170/0x3f0 [ 21.068092] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.068270] kthread+0x328/0x630 [ 21.068433] ret_from_fork+0x10/0x20 [ 21.068974] [ 21.069110] Allocated by task 260: [ 21.069216] kasan_save_stack+0x3c/0x68 [ 21.069377] kasan_save_track+0x20/0x40 [ 21.069505] kasan_save_alloc_info+0x40/0x58 [ 21.069580] __kasan_kmalloc+0xd4/0xd8 [ 21.070017] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.070553] kasan_strings+0xc8/0xb00 [ 21.070674] kunit_try_run_case+0x170/0x3f0 [ 21.071119] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.071197] kthread+0x328/0x630 [ 21.071237] ret_from_fork+0x10/0x20 [ 21.071312] [ 21.071339] Freed by task 260: [ 21.072165] kasan_save_stack+0x3c/0x68 [ 21.072383] kasan_save_track+0x20/0x40 [ 21.072548] kasan_save_free_info+0x4c/0x78 [ 21.072910] __kasan_slab_free+0x6c/0x98 [ 21.073127] kfree+0x214/0x3c8 [ 21.073219] kasan_strings+0x24c/0xb00 [ 21.073339] kunit_try_run_case+0x170/0x3f0 [ 21.073385] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.073563] kthread+0x328/0x630 [ 21.073610] ret_from_fork+0x10/0x20 [ 21.073898] [ 21.074310] The buggy address belongs to the object at fff00000c76d9200 [ 21.074310] which belongs to the cache kmalloc-32 of size 32 [ 21.074621] The buggy address is located 16 bytes inside of [ 21.074621] freed 32-byte region [fff00000c76d9200, fff00000c76d9220) [ 21.074747] [ 21.074816] The buggy address belongs to the physical page: [ 21.074869] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1076d9 [ 21.074959] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.075032] page_type: f5(slab) [ 21.075084] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.075175] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.075226] page dumped because: kasan: bad access detected [ 21.075265] [ 21.075286] Memory state around the buggy address: [ 21.075342] fff00000c76d9100: 00 00 00 fc fc fc fc fc 00 00 00 04 fc fc fc fc [ 21.075394] fff00000c76d9180: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.075446] >fff00000c76d9200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.075493] ^ [ 21.075530] fff00000c76d9280: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.075581] fff00000c76d9300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.075651] ==================================================================
[ 13.426606] ================================================================== [ 13.427589] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 13.427865] Read of size 1 at addr ffff888103aaf390 by task kunit_try_catch/276 [ 13.428180] [ 13.428271] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.428318] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.428330] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.428352] Call Trace: [ 13.428365] <TASK> [ 13.428397] dump_stack_lvl+0x73/0xb0 [ 13.428426] print_report+0xd1/0x650 [ 13.428451] ? __virt_addr_valid+0x1db/0x2d0 [ 13.428476] ? strcmp+0xb0/0xc0 [ 13.428495] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.428518] ? strcmp+0xb0/0xc0 [ 13.428538] kasan_report+0x141/0x180 [ 13.428559] ? strcmp+0xb0/0xc0 [ 13.428584] __asan_report_load1_noabort+0x18/0x20 [ 13.428608] strcmp+0xb0/0xc0 [ 13.428631] kasan_strings+0x431/0xe80 [ 13.428660] ? trace_hardirqs_on+0x37/0xe0 [ 13.428684] ? __pfx_kasan_strings+0x10/0x10 [ 13.428704] ? finish_task_switch.isra.0+0x153/0x700 [ 13.428726] ? __switch_to+0x47/0xf50 [ 13.428753] ? __schedule+0x10cc/0x2b60 [ 13.428775] ? __pfx_read_tsc+0x10/0x10 [ 13.428797] ? ktime_get_ts64+0x86/0x230 [ 13.428820] kunit_try_run_case+0x1a5/0x480 [ 13.428845] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.428867] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.428890] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.428912] ? __kthread_parkme+0x82/0x180 [ 13.428933] ? preempt_count_sub+0x50/0x80 [ 13.428955] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.428980] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.429002] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.429025] kthread+0x337/0x6f0 [ 13.429044] ? trace_preempt_on+0x20/0xc0 [ 13.429065] ? __pfx_kthread+0x10/0x10 [ 13.429085] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.429105] ? calculate_sigpending+0x7b/0xa0 [ 13.429128] ? __pfx_kthread+0x10/0x10 [ 13.429148] ret_from_fork+0x116/0x1d0 [ 13.429166] ? __pfx_kthread+0x10/0x10 [ 13.429185] ret_from_fork_asm+0x1a/0x30 [ 13.429216] </TASK> [ 13.429227] [ 13.436162] Allocated by task 276: [ 13.436341] kasan_save_stack+0x45/0x70 [ 13.436554] kasan_save_track+0x18/0x40 [ 13.436750] kasan_save_alloc_info+0x3b/0x50 [ 13.436959] __kasan_kmalloc+0xb7/0xc0 [ 13.437147] __kmalloc_cache_noprof+0x189/0x420 [ 13.437327] kasan_strings+0xc0/0xe80 [ 13.437514] kunit_try_run_case+0x1a5/0x480 [ 13.437701] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.437875] kthread+0x337/0x6f0 [ 13.437995] ret_from_fork+0x116/0x1d0 [ 13.438164] ret_from_fork_asm+0x1a/0x30 [ 13.438359] [ 13.438462] Freed by task 276: [ 13.438652] kasan_save_stack+0x45/0x70 [ 13.438845] kasan_save_track+0x18/0x40 [ 13.439036] kasan_save_free_info+0x3f/0x60 [ 13.439204] __kasan_slab_free+0x56/0x70 [ 13.439406] kfree+0x222/0x3f0 [ 13.439565] kasan_strings+0x2aa/0xe80 [ 13.439711] kunit_try_run_case+0x1a5/0x480 [ 13.439920] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.440137] kthread+0x337/0x6f0 [ 13.440299] ret_from_fork+0x116/0x1d0 [ 13.440461] ret_from_fork_asm+0x1a/0x30 [ 13.440709] [ 13.440793] The buggy address belongs to the object at ffff888103aaf380 [ 13.440793] which belongs to the cache kmalloc-32 of size 32 [ 13.441254] The buggy address is located 16 bytes inside of [ 13.441254] freed 32-byte region [ffff888103aaf380, ffff888103aaf3a0) [ 13.441708] [ 13.441810] The buggy address belongs to the physical page: [ 13.442058] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103aaf [ 13.442419] flags: 0x200000000000000(node=0|zone=2) [ 13.442688] page_type: f5(slab) [ 13.442813] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.443093] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.443440] page dumped because: kasan: bad access detected [ 13.443777] [ 13.443866] Memory state around the buggy address: [ 13.444072] ffff888103aaf280: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 13.444350] ffff888103aaf300: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.444719] >ffff888103aaf380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.444992] ^ [ 13.445159] ffff888103aaf400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.445442] ffff888103aaf480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.445829] ==================================================================