Date
July 8, 2025, 7:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.611368] ================================================================== [ 21.611452] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 21.611576] Read of size 1 at addr fff00000c56a2110 by task kunit_try_catch/259 [ 21.611718] [ 21.611825] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 21.611948] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.612267] Hardware name: linux,dummy-virt (DT) [ 21.612466] Call trace: [ 21.612637] show_stack+0x20/0x38 (C) [ 21.612724] dump_stack_lvl+0x8c/0xd0 [ 21.612909] print_report+0x118/0x608 [ 21.613182] kasan_report+0xdc/0x128 [ 21.613364] __asan_report_load1_noabort+0x20/0x30 [ 21.613506] strcmp+0xc0/0xc8 [ 21.613593] kasan_strings+0x340/0xb00 [ 21.613640] kunit_try_run_case+0x170/0x3f0 [ 21.613854] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.614065] kthread+0x328/0x630 [ 21.614144] ret_from_fork+0x10/0x20 [ 21.614313] [ 21.614371] Allocated by task 259: [ 21.614497] kasan_save_stack+0x3c/0x68 [ 21.614574] kasan_save_track+0x20/0x40 [ 21.614782] kasan_save_alloc_info+0x40/0x58 [ 21.615145] __kasan_kmalloc+0xd4/0xd8 [ 21.615307] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.615416] kasan_strings+0xc8/0xb00 [ 21.615524] kunit_try_run_case+0x170/0x3f0 [ 21.615614] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.615665] kthread+0x328/0x630 [ 21.615700] ret_from_fork+0x10/0x20 [ 21.615748] [ 21.615937] Freed by task 259: [ 21.616165] kasan_save_stack+0x3c/0x68 [ 21.616317] kasan_save_track+0x20/0x40 [ 21.616395] kasan_save_free_info+0x4c/0x78 [ 21.616547] __kasan_slab_free+0x6c/0x98 [ 21.616637] kfree+0x214/0x3c8 [ 21.616956] kasan_strings+0x24c/0xb00 [ 21.617163] kunit_try_run_case+0x170/0x3f0 [ 21.617326] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.617424] kthread+0x328/0x630 [ 21.617562] ret_from_fork+0x10/0x20 [ 21.617661] [ 21.617724] The buggy address belongs to the object at fff00000c56a2100 [ 21.617724] which belongs to the cache kmalloc-32 of size 32 [ 21.617953] The buggy address is located 16 bytes inside of [ 21.617953] freed 32-byte region [fff00000c56a2100, fff00000c56a2120) [ 21.618113] [ 21.618190] The buggy address belongs to the physical page: [ 21.618256] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056a2 [ 21.618446] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.618512] page_type: f5(slab) [ 21.618554] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.618608] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.618660] page dumped because: kasan: bad access detected [ 21.618693] [ 21.618726] Memory state around the buggy address: [ 21.618779] fff00000c56a2000: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.618826] fff00000c56a2080: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 21.618871] >fff00000c56a2100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.618911] ^ [ 21.618941] fff00000c56a2180: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.618984] fff00000c56a2200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.619034] ==================================================================
[ 14.941906] ================================================================== [ 14.944192] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.944427] Read of size 1 at addr ffff888102b12e50 by task kunit_try_catch/276 [ 14.945000] [ 14.945242] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.945292] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.945305] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.945328] Call Trace: [ 14.945340] <TASK> [ 14.945359] dump_stack_lvl+0x73/0xb0 [ 14.945387] print_report+0xd1/0x650 [ 14.945412] ? __virt_addr_valid+0x1db/0x2d0 [ 14.945436] ? strcmp+0xb0/0xc0 [ 14.945452] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.945477] ? strcmp+0xb0/0xc0 [ 14.945503] kasan_report+0x141/0x180 [ 14.945525] ? strcmp+0xb0/0xc0 [ 14.945547] __asan_report_load1_noabort+0x18/0x20 [ 14.945574] strcmp+0xb0/0xc0 [ 14.945592] kasan_strings+0x431/0xe80 [ 14.945612] ? trace_hardirqs_on+0x37/0xe0 [ 14.945635] ? __pfx_kasan_strings+0x10/0x10 [ 14.945655] ? finish_task_switch.isra.0+0x153/0x700 [ 14.945677] ? __switch_to+0x47/0xf50 [ 14.945704] ? __schedule+0x10cc/0x2b60 [ 14.945726] ? __pfx_read_tsc+0x10/0x10 [ 14.945746] ? ktime_get_ts64+0x86/0x230 [ 14.945771] kunit_try_run_case+0x1a5/0x480 [ 14.945795] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.945816] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.945840] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.945862] ? __kthread_parkme+0x82/0x180 [ 14.945882] ? preempt_count_sub+0x50/0x80 [ 14.945905] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.945928] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.945951] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.945973] kthread+0x337/0x6f0 [ 14.945992] ? trace_preempt_on+0x20/0xc0 [ 14.946013] ? __pfx_kthread+0x10/0x10 [ 14.946033] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.946063] ? calculate_sigpending+0x7b/0xa0 [ 14.946088] ? __pfx_kthread+0x10/0x10 [ 14.946108] ret_from_fork+0x116/0x1d0 [ 14.946126] ? __pfx_kthread+0x10/0x10 [ 14.946146] ret_from_fork_asm+0x1a/0x30 [ 14.946177] </TASK> [ 14.946188] [ 14.955344] Allocated by task 276: [ 14.955487] kasan_save_stack+0x45/0x70 [ 14.955697] kasan_save_track+0x18/0x40 [ 14.955882] kasan_save_alloc_info+0x3b/0x50 [ 14.956029] __kasan_kmalloc+0xb7/0xc0 [ 14.956311] __kmalloc_cache_noprof+0x189/0x420 [ 14.956550] kasan_strings+0xc0/0xe80 [ 14.956746] kunit_try_run_case+0x1a5/0x480 [ 14.956929] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.957278] kthread+0x337/0x6f0 [ 14.957435] ret_from_fork+0x116/0x1d0 [ 14.957576] ret_from_fork_asm+0x1a/0x30 [ 14.957714] [ 14.957840] Freed by task 276: [ 14.957998] kasan_save_stack+0x45/0x70 [ 14.958201] kasan_save_track+0x18/0x40 [ 14.958390] kasan_save_free_info+0x3f/0x60 [ 14.958589] __kasan_slab_free+0x56/0x70 [ 14.958726] kfree+0x222/0x3f0 [ 14.958842] kasan_strings+0x2aa/0xe80 [ 14.959166] kunit_try_run_case+0x1a5/0x480 [ 14.959394] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.959672] kthread+0x337/0x6f0 [ 14.959841] ret_from_fork+0x116/0x1d0 [ 14.960005] ret_from_fork_asm+0x1a/0x30 [ 14.960232] [ 14.960307] The buggy address belongs to the object at ffff888102b12e40 [ 14.960307] which belongs to the cache kmalloc-32 of size 32 [ 14.960771] The buggy address is located 16 bytes inside of [ 14.960771] freed 32-byte region [ffff888102b12e40, ffff888102b12e60) [ 14.961263] [ 14.961456] The buggy address belongs to the physical page: [ 14.961759] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b12 [ 14.962004] flags: 0x200000000000000(node=0|zone=2) [ 14.962186] page_type: f5(slab) [ 14.962310] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.962649] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 14.962987] page dumped because: kasan: bad access detected [ 14.963526] [ 14.963631] Memory state around the buggy address: [ 14.963797] ffff888102b12d00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.964015] ffff888102b12d80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.964583] >ffff888102b12e00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.965010] ^ [ 14.965320] ffff888102b12e80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.965649] ffff888102b12f00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.965865] ==================================================================