Date
July 16, 2025, 3:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.814984] ================================================================== [ 18.815040] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 18.815099] Read of size 1 at addr fff00000c595c710 by task kunit_try_catch/259 [ 18.815153] [ 18.815211] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 18.816223] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.816406] Hardware name: linux,dummy-virt (DT) [ 18.816599] Call trace: [ 18.816883] show_stack+0x20/0x38 (C) [ 18.816983] dump_stack_lvl+0x8c/0xd0 [ 18.817081] print_report+0x118/0x5d0 [ 18.817218] kasan_report+0xdc/0x128 [ 18.817290] __asan_report_load1_noabort+0x20/0x30 [ 18.817649] strcmp+0xc0/0xc8 [ 18.817791] kasan_strings+0x340/0xb00 [ 18.817886] kunit_try_run_case+0x170/0x3f0 [ 18.818029] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.818145] kthread+0x328/0x630 [ 18.818297] ret_from_fork+0x10/0x20 [ 18.818680] [ 18.818741] Allocated by task 259: [ 18.818828] kasan_save_stack+0x3c/0x68 [ 18.818954] kasan_save_track+0x20/0x40 [ 18.819163] kasan_save_alloc_info+0x40/0x58 [ 18.819236] __kasan_kmalloc+0xd4/0xd8 [ 18.819323] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.819380] kasan_strings+0xc8/0xb00 [ 18.819423] kunit_try_run_case+0x170/0x3f0 [ 18.819624] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.819846] kthread+0x328/0x630 [ 18.819956] ret_from_fork+0x10/0x20 [ 18.820122] [ 18.820172] Freed by task 259: [ 18.820291] kasan_save_stack+0x3c/0x68 [ 18.820347] kasan_save_track+0x20/0x40 [ 18.820441] kasan_save_free_info+0x4c/0x78 [ 18.820630] __kasan_slab_free+0x6c/0x98 [ 18.820790] kfree+0x214/0x3c8 [ 18.820833] kasan_strings+0x24c/0xb00 [ 18.821210] kunit_try_run_case+0x170/0x3f0 [ 18.821346] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.821510] kthread+0x328/0x630 [ 18.821599] ret_from_fork+0x10/0x20 [ 18.821751] [ 18.821777] The buggy address belongs to the object at fff00000c595c700 [ 18.821777] which belongs to the cache kmalloc-32 of size 32 [ 18.822425] The buggy address is located 16 bytes inside of [ 18.822425] freed 32-byte region [fff00000c595c700, fff00000c595c720) [ 18.822581] [ 18.822638] The buggy address belongs to the physical page: [ 18.822743] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10595c [ 18.822817] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.823159] page_type: f5(slab) [ 18.823315] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.823475] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.823572] page dumped because: kasan: bad access detected [ 18.823651] [ 18.823805] Memory state around the buggy address: [ 18.823844] fff00000c595c600: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.823897] fff00000c595c680: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 18.823943] >fff00000c595c700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.824343] ^ [ 18.824441] fff00000c595c780: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.824594] fff00000c595c800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.824693] ==================================================================
[ 14.532681] ================================================================== [ 14.533728] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.534159] Read of size 1 at addr ffff888103a5c550 by task kunit_try_catch/276 [ 14.534446] [ 14.534561] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 14.534608] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.534620] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.534641] Call Trace: [ 14.534652] <TASK> [ 14.534667] dump_stack_lvl+0x73/0xb0 [ 14.534698] print_report+0xd1/0x610 [ 14.534724] ? __virt_addr_valid+0x1db/0x2d0 [ 14.534749] ? strcmp+0xb0/0xc0 [ 14.534780] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.534806] ? strcmp+0xb0/0xc0 [ 14.534824] kasan_report+0x141/0x180 [ 14.534847] ? strcmp+0xb0/0xc0 [ 14.534870] __asan_report_load1_noabort+0x18/0x20 [ 14.534896] strcmp+0xb0/0xc0 [ 14.534916] kasan_strings+0x431/0xe80 [ 14.534936] ? trace_hardirqs_on+0x37/0xe0 [ 14.534962] ? __pfx_kasan_strings+0x10/0x10 [ 14.534984] ? finish_task_switch.isra.0+0x153/0x700 [ 14.535010] ? __switch_to+0x47/0xf50 [ 14.535036] ? __schedule+0x10cc/0x2b60 [ 14.535117] ? __pfx_read_tsc+0x10/0x10 [ 14.535141] ? ktime_get_ts64+0x86/0x230 [ 14.535166] kunit_try_run_case+0x1a5/0x480 [ 14.535201] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.535226] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.535252] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.535279] ? __kthread_parkme+0x82/0x180 [ 14.535300] ? preempt_count_sub+0x50/0x80 [ 14.535325] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.535354] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.535380] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.535408] kthread+0x337/0x6f0 [ 14.535427] ? trace_preempt_on+0x20/0xc0 [ 14.535460] ? __pfx_kthread+0x10/0x10 [ 14.535481] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.535505] ? calculate_sigpending+0x7b/0xa0 [ 14.535531] ? __pfx_kthread+0x10/0x10 [ 14.535553] ret_from_fork+0x116/0x1d0 [ 14.535573] ? __pfx_kthread+0x10/0x10 [ 14.535595] ret_from_fork_asm+0x1a/0x30 [ 14.535626] </TASK> [ 14.535637] [ 14.543601] Allocated by task 276: [ 14.543800] kasan_save_stack+0x45/0x70 [ 14.544009] kasan_save_track+0x18/0x40 [ 14.544211] kasan_save_alloc_info+0x3b/0x50 [ 14.544608] __kasan_kmalloc+0xb7/0xc0 [ 14.544828] __kmalloc_cache_noprof+0x189/0x420 [ 14.545150] kasan_strings+0xc0/0xe80 [ 14.545325] kunit_try_run_case+0x1a5/0x480 [ 14.545474] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.545730] kthread+0x337/0x6f0 [ 14.545923] ret_from_fork+0x116/0x1d0 [ 14.546165] ret_from_fork_asm+0x1a/0x30 [ 14.546315] [ 14.546387] Freed by task 276: [ 14.546500] kasan_save_stack+0x45/0x70 [ 14.546638] kasan_save_track+0x18/0x40 [ 14.546845] kasan_save_free_info+0x3f/0x60 [ 14.547054] __kasan_slab_free+0x56/0x70 [ 14.547260] kfree+0x222/0x3f0 [ 14.547591] kasan_strings+0x2aa/0xe80 [ 14.547797] kunit_try_run_case+0x1a5/0x480 [ 14.547958] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.548370] kthread+0x337/0x6f0 [ 14.548527] ret_from_fork+0x116/0x1d0 [ 14.548665] ret_from_fork_asm+0x1a/0x30 [ 14.548840] [ 14.548937] The buggy address belongs to the object at ffff888103a5c540 [ 14.548937] which belongs to the cache kmalloc-32 of size 32 [ 14.549729] The buggy address is located 16 bytes inside of [ 14.549729] freed 32-byte region [ffff888103a5c540, ffff888103a5c560) [ 14.550247] [ 14.550355] The buggy address belongs to the physical page: [ 14.550597] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a5c [ 14.550945] flags: 0x200000000000000(node=0|zone=2) [ 14.551250] page_type: f5(slab) [ 14.551426] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.551672] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.551916] page dumped because: kasan: bad access detected [ 14.552154] [ 14.552250] Memory state around the buggy address: [ 14.552483] ffff888103a5c400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.552817] ffff888103a5c480: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.553405] >ffff888103a5c500: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.553629] ^ [ 14.553917] ffff888103a5c580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.554373] ffff888103a5c600: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.554668] ==================================================================