Date
July 16, 2025, 3:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.663627] ================================================================== [ 16.663690] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 16.663757] Read of size 16 at addr fff00000c3eef560 by task kunit_try_catch/168 [ 16.663808] [ 16.663839] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.664154] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.664184] Hardware name: linux,dummy-virt (DT) [ 16.664214] Call trace: [ 16.664236] show_stack+0x20/0x38 (C) [ 16.664286] dump_stack_lvl+0x8c/0xd0 [ 16.664334] print_report+0x118/0x5d0 [ 16.664463] kasan_report+0xdc/0x128 [ 16.664537] __asan_report_load16_noabort+0x20/0x30 [ 16.664589] kmalloc_uaf_16+0x3bc/0x438 [ 16.664769] kunit_try_run_case+0x170/0x3f0 [ 16.664830] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.664884] kthread+0x328/0x630 [ 16.664940] ret_from_fork+0x10/0x20 [ 16.664997] [ 16.665015] Allocated by task 168: [ 16.665043] kasan_save_stack+0x3c/0x68 [ 16.665083] kasan_save_track+0x20/0x40 [ 16.665119] kasan_save_alloc_info+0x40/0x58 [ 16.665158] __kasan_kmalloc+0xd4/0xd8 [ 16.665193] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.665231] kmalloc_uaf_16+0x140/0x438 [ 16.665273] kunit_try_run_case+0x170/0x3f0 [ 16.665310] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.665352] kthread+0x328/0x630 [ 16.665384] ret_from_fork+0x10/0x20 [ 16.665419] [ 16.665436] Freed by task 168: [ 16.665460] kasan_save_stack+0x3c/0x68 [ 16.665495] kasan_save_track+0x20/0x40 [ 16.665540] kasan_save_free_info+0x4c/0x78 [ 16.665579] __kasan_slab_free+0x6c/0x98 [ 16.665615] kfree+0x214/0x3c8 [ 16.665647] kmalloc_uaf_16+0x190/0x438 [ 16.665680] kunit_try_run_case+0x170/0x3f0 [ 16.665729] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.665771] kthread+0x328/0x630 [ 16.665801] ret_from_fork+0x10/0x20 [ 16.665835] [ 16.665852] The buggy address belongs to the object at fff00000c3eef560 [ 16.665852] which belongs to the cache kmalloc-16 of size 16 [ 16.666024] The buggy address is located 0 bytes inside of [ 16.666024] freed 16-byte region [fff00000c3eef560, fff00000c3eef570) [ 16.666151] [ 16.666175] The buggy address belongs to the physical page: [ 16.666206] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103eef [ 16.666261] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.666452] page_type: f5(slab) [ 16.666492] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.666570] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.666629] page dumped because: kasan: bad access detected [ 16.666677] [ 16.666695] Memory state around the buggy address: [ 16.666763] fff00000c3eef400: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.666833] fff00000c3eef480: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 16.666876] >fff00000c3eef500: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 16.666914] ^ [ 16.666951] fff00000c3eef580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.666992] fff00000c3eef600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.667028] ==================================================================
[ 12.561261] ================================================================== [ 12.561692] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.561958] Read of size 16 at addr ffff8881009b2fa0 by task kunit_try_catch/185 [ 12.563091] [ 12.563343] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.563390] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.563402] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.563422] Call Trace: [ 12.563434] <TASK> [ 12.563450] dump_stack_lvl+0x73/0xb0 [ 12.563482] print_report+0xd1/0x610 [ 12.563505] ? __virt_addr_valid+0x1db/0x2d0 [ 12.563527] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.563548] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.563572] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.563593] kasan_report+0x141/0x180 [ 12.563615] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.563640] __asan_report_load16_noabort+0x18/0x20 [ 12.563666] kmalloc_uaf_16+0x47b/0x4c0 [ 12.563687] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.563710] ? __schedule+0x10cc/0x2b60 [ 12.563733] ? __pfx_read_tsc+0x10/0x10 [ 12.563766] ? ktime_get_ts64+0x86/0x230 [ 12.563792] kunit_try_run_case+0x1a5/0x480 [ 12.563817] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.563840] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.563865] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.563889] ? __kthread_parkme+0x82/0x180 [ 12.563910] ? preempt_count_sub+0x50/0x80 [ 12.563934] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.563959] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.564076] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.564104] kthread+0x337/0x6f0 [ 12.564138] ? trace_preempt_on+0x20/0xc0 [ 12.564162] ? __pfx_kthread+0x10/0x10 [ 12.564183] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.564205] ? calculate_sigpending+0x7b/0xa0 [ 12.564230] ? __pfx_kthread+0x10/0x10 [ 12.564252] ret_from_fork+0x116/0x1d0 [ 12.564271] ? __pfx_kthread+0x10/0x10 [ 12.564293] ret_from_fork_asm+0x1a/0x30 [ 12.564325] </TASK> [ 12.564335] [ 12.578524] Allocated by task 185: [ 12.578945] kasan_save_stack+0x45/0x70 [ 12.579391] kasan_save_track+0x18/0x40 [ 12.579806] kasan_save_alloc_info+0x3b/0x50 [ 12.579969] __kasan_kmalloc+0xb7/0xc0 [ 12.580439] __kmalloc_cache_noprof+0x189/0x420 [ 12.581032] kmalloc_uaf_16+0x15b/0x4c0 [ 12.581590] kunit_try_run_case+0x1a5/0x480 [ 12.581751] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.581946] kthread+0x337/0x6f0 [ 12.582371] ret_from_fork+0x116/0x1d0 [ 12.582778] ret_from_fork_asm+0x1a/0x30 [ 12.583275] [ 12.583497] Freed by task 185: [ 12.583851] kasan_save_stack+0x45/0x70 [ 12.584332] kasan_save_track+0x18/0x40 [ 12.584682] kasan_save_free_info+0x3f/0x60 [ 12.584846] __kasan_slab_free+0x56/0x70 [ 12.585183] kfree+0x222/0x3f0 [ 12.585509] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.585907] kunit_try_run_case+0x1a5/0x480 [ 12.586448] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.587147] kthread+0x337/0x6f0 [ 12.587476] ret_from_fork+0x116/0x1d0 [ 12.587616] ret_from_fork_asm+0x1a/0x30 [ 12.587768] [ 12.587842] The buggy address belongs to the object at ffff8881009b2fa0 [ 12.587842] which belongs to the cache kmalloc-16 of size 16 [ 12.588921] The buggy address is located 0 bytes inside of [ 12.588921] freed 16-byte region [ffff8881009b2fa0, ffff8881009b2fb0) [ 12.590236] [ 12.590472] The buggy address belongs to the physical page: [ 12.591009] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1009b2 [ 12.591452] flags: 0x200000000000000(node=0|zone=2) [ 12.591950] page_type: f5(slab) [ 12.592350] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.592805] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.593563] page dumped because: kasan: bad access detected [ 12.593843] [ 12.593915] Memory state around the buggy address: [ 12.594327] ffff8881009b2e80: 00 00 fc fc 00 06 fc fc 00 06 fc fc 00 00 fc fc [ 12.594985] ffff8881009b2f00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.595741] >ffff8881009b2f80: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.596322] ^ [ 12.596507] ffff8881009b3000: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 12.597281] ffff8881009b3080: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 12.597633] ==================================================================