Date
July 9, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.904962] ================================================================== [ 16.905023] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 16.905078] Read of size 1 at addr fff00000c63bfd28 by task kunit_try_catch/188 [ 16.905185] [ 16.905230] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.905326] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.905351] Hardware name: linux,dummy-virt (DT) [ 16.905413] Call trace: [ 16.905443] show_stack+0x20/0x38 (C) [ 16.905494] dump_stack_lvl+0x8c/0xd0 [ 16.905558] print_report+0x118/0x608 [ 16.905640] kasan_report+0xdc/0x128 [ 16.905704] __asan_report_load1_noabort+0x20/0x30 [ 16.905767] kmalloc_uaf2+0x3f4/0x468 [ 16.905812] kunit_try_run_case+0x170/0x3f0 [ 16.905860] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.905913] kthread+0x328/0x630 [ 16.905957] ret_from_fork+0x10/0x20 [ 16.906005] [ 16.906023] Allocated by task 188: [ 16.906217] kasan_save_stack+0x3c/0x68 [ 16.906266] kasan_save_track+0x20/0x40 [ 16.906306] kasan_save_alloc_info+0x40/0x58 [ 16.906493] __kasan_kmalloc+0xd4/0xd8 [ 16.906542] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.906613] kmalloc_uaf2+0xc4/0x468 [ 16.906648] kunit_try_run_case+0x170/0x3f0 [ 16.906717] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.906760] kthread+0x328/0x630 [ 16.906793] ret_from_fork+0x10/0x20 [ 16.906974] [ 16.907021] Freed by task 188: [ 16.907081] kasan_save_stack+0x3c/0x68 [ 16.907203] kasan_save_track+0x20/0x40 [ 16.907272] kasan_save_free_info+0x4c/0x78 [ 16.907337] __kasan_slab_free+0x6c/0x98 [ 16.907428] kfree+0x214/0x3c8 [ 16.907506] kmalloc_uaf2+0x134/0x468 [ 16.907563] kunit_try_run_case+0x170/0x3f0 [ 16.907667] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.907744] kthread+0x328/0x630 [ 16.907820] ret_from_fork+0x10/0x20 [ 16.907964] [ 16.907983] The buggy address belongs to the object at fff00000c63bfd00 [ 16.907983] which belongs to the cache kmalloc-64 of size 64 [ 16.908043] The buggy address is located 40 bytes inside of [ 16.908043] freed 64-byte region [fff00000c63bfd00, fff00000c63bfd40) [ 16.908161] [ 16.908217] The buggy address belongs to the physical page: [ 16.908297] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1063bf [ 16.908360] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.908428] page_type: f5(slab) [ 16.908533] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.908599] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.908666] page dumped because: kasan: bad access detected [ 16.908720] [ 16.908801] Memory state around the buggy address: [ 16.908859] fff00000c63bfc00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.908921] fff00000c63bfc80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.908962] >fff00000c63bfd00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.909000] ^ [ 16.909041] fff00000c63bfd80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 16.909083] fff00000c63bfe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.909275] ==================================================================
[ 12.869698] ================================================================== [ 12.870935] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 12.871178] Read of size 1 at addr ffff88810320eea8 by task kunit_try_catch/205 [ 12.871401] [ 12.871496] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.871540] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.871552] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.871572] Call Trace: [ 12.871585] <TASK> [ 12.871601] dump_stack_lvl+0x73/0xb0 [ 12.871633] print_report+0xd1/0x650 [ 12.871655] ? __virt_addr_valid+0x1db/0x2d0 [ 12.871678] ? kmalloc_uaf2+0x4a8/0x520 [ 12.871698] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.871763] ? kmalloc_uaf2+0x4a8/0x520 [ 12.871783] kasan_report+0x141/0x180 [ 12.871805] ? kmalloc_uaf2+0x4a8/0x520 [ 12.871829] __asan_report_load1_noabort+0x18/0x20 [ 12.871854] kmalloc_uaf2+0x4a8/0x520 [ 12.871874] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 12.871893] ? finish_task_switch.isra.0+0x153/0x700 [ 12.871917] ? __switch_to+0x47/0xf50 [ 12.871945] ? __schedule+0x10cc/0x2b60 [ 12.871968] ? __pfx_read_tsc+0x10/0x10 [ 12.872153] ? ktime_get_ts64+0x86/0x230 [ 12.872193] kunit_try_run_case+0x1a5/0x480 [ 12.872463] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.872489] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.872523] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.872547] ? __kthread_parkme+0x82/0x180 [ 12.872568] ? preempt_count_sub+0x50/0x80 [ 12.872590] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.872615] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.872639] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.872664] kthread+0x337/0x6f0 [ 12.872682] ? trace_preempt_on+0x20/0xc0 [ 12.872719] ? __pfx_kthread+0x10/0x10 [ 12.872740] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.872761] ? calculate_sigpending+0x7b/0xa0 [ 12.872785] ? __pfx_kthread+0x10/0x10 [ 12.872806] ret_from_fork+0x116/0x1d0 [ 12.872824] ? __pfx_kthread+0x10/0x10 [ 12.872843] ret_from_fork_asm+0x1a/0x30 [ 12.872874] </TASK> [ 12.872885] [ 12.882823] Allocated by task 205: [ 12.883158] kasan_save_stack+0x45/0x70 [ 12.883364] kasan_save_track+0x18/0x40 [ 12.883497] kasan_save_alloc_info+0x3b/0x50 [ 12.883640] __kasan_kmalloc+0xb7/0xc0 [ 12.883830] __kmalloc_cache_noprof+0x189/0x420 [ 12.884244] kmalloc_uaf2+0xc6/0x520 [ 12.884443] kunit_try_run_case+0x1a5/0x480 [ 12.884650] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.885094] kthread+0x337/0x6f0 [ 12.885230] ret_from_fork+0x116/0x1d0 [ 12.885501] ret_from_fork_asm+0x1a/0x30 [ 12.885696] [ 12.885819] Freed by task 205: [ 12.885986] kasan_save_stack+0x45/0x70 [ 12.886376] kasan_save_track+0x18/0x40 [ 12.886559] kasan_save_free_info+0x3f/0x60 [ 12.886770] __kasan_slab_free+0x56/0x70 [ 12.887199] kfree+0x222/0x3f0 [ 12.887355] kmalloc_uaf2+0x14c/0x520 [ 12.887566] kunit_try_run_case+0x1a5/0x480 [ 12.887852] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.888318] kthread+0x337/0x6f0 [ 12.888476] ret_from_fork+0x116/0x1d0 [ 12.888781] ret_from_fork_asm+0x1a/0x30 [ 12.889004] [ 12.889268] The buggy address belongs to the object at ffff88810320ee80 [ 12.889268] which belongs to the cache kmalloc-64 of size 64 [ 12.889787] The buggy address is located 40 bytes inside of [ 12.889787] freed 64-byte region [ffff88810320ee80, ffff88810320eec0) [ 12.890450] [ 12.890577] The buggy address belongs to the physical page: [ 12.890850] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10320e [ 12.891326] flags: 0x200000000000000(node=0|zone=2) [ 12.891556] page_type: f5(slab) [ 12.891725] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.892114] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.892472] page dumped because: kasan: bad access detected [ 12.892795] [ 12.892920] Memory state around the buggy address: [ 12.893368] ffff88810320ed80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.893699] ffff88810320ee00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.894142] >ffff88810320ee80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.894426] ^ [ 12.894640] ffff88810320ef00: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 12.894977] ffff88810320ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.895348] ==================================================================