Date
July 17, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.594496] ================================================================== [ 16.594563] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 16.594627] Read of size 16 at addr fff00000c3e55140 by task kunit_try_catch/168 [ 16.594677] [ 16.594739] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.594819] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.594845] Hardware name: linux,dummy-virt (DT) [ 16.595754] Call trace: [ 16.595978] show_stack+0x20/0x38 (C) [ 16.596049] dump_stack_lvl+0x8c/0xd0 [ 16.596483] print_report+0x118/0x5d0 [ 16.596622] kasan_report+0xdc/0x128 [ 16.596668] __asan_report_load16_noabort+0x20/0x30 [ 16.597034] kmalloc_uaf_16+0x3bc/0x438 [ 16.597172] kunit_try_run_case+0x170/0x3f0 [ 16.597298] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.597492] kthread+0x328/0x630 [ 16.597693] ret_from_fork+0x10/0x20 [ 16.598108] [ 16.598243] Allocated by task 168: [ 16.598345] kasan_save_stack+0x3c/0x68 [ 16.598423] kasan_save_track+0x20/0x40 [ 16.598518] kasan_save_alloc_info+0x40/0x58 [ 16.598590] __kasan_kmalloc+0xd4/0xd8 [ 16.598666] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.598985] kmalloc_uaf_16+0x140/0x438 [ 16.599509] kunit_try_run_case+0x170/0x3f0 [ 16.599645] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.599923] kthread+0x328/0x630 [ 16.599964] ret_from_fork+0x10/0x20 [ 16.600017] [ 16.600037] Freed by task 168: [ 16.600245] kasan_save_stack+0x3c/0x68 [ 16.600444] kasan_save_track+0x20/0x40 [ 16.600506] kasan_save_free_info+0x4c/0x78 [ 16.600716] __kasan_slab_free+0x6c/0x98 [ 16.600921] kfree+0x214/0x3c8 [ 16.600957] kmalloc_uaf_16+0x190/0x438 [ 16.601166] kunit_try_run_case+0x170/0x3f0 [ 16.601527] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.601596] kthread+0x328/0x630 [ 16.601710] ret_from_fork+0x10/0x20 [ 16.601800] [ 16.601840] The buggy address belongs to the object at fff00000c3e55140 [ 16.601840] which belongs to the cache kmalloc-16 of size 16 [ 16.602245] The buggy address is located 0 bytes inside of [ 16.602245] freed 16-byte region [fff00000c3e55140, fff00000c3e55150) [ 16.602343] [ 16.602758] The buggy address belongs to the physical page: [ 16.603163] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103e55 [ 16.603248] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.603320] page_type: f5(slab) [ 16.603730] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.603801] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.604331] page dumped because: kasan: bad access detected [ 16.604386] [ 16.604588] Memory state around the buggy address: [ 16.604786] fff00000c3e55000: 00 06 fc fc 00 06 fc fc 00 02 fc fc 00 06 fc fc [ 16.604872] fff00000c3e55080: 00 05 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.605160] >fff00000c3e55100: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 16.605387] ^ [ 16.605522] fff00000c3e55180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.605653] fff00000c3e55200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.605751] ==================================================================
[ 12.273303] ================================================================== [ 12.274087] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.274724] Read of size 16 at addr ffff8881025ee320 by task kunit_try_catch/185 [ 12.275376] [ 12.275541] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.275631] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.275642] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.275675] Call Trace: [ 12.275687] <TASK> [ 12.275706] dump_stack_lvl+0x73/0xb0 [ 12.275735] print_report+0xd1/0x610 [ 12.275757] ? __virt_addr_valid+0x1db/0x2d0 [ 12.275780] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.275799] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.275883] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.275904] kasan_report+0x141/0x180 [ 12.275927] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.275952] __asan_report_load16_noabort+0x18/0x20 [ 12.275976] kmalloc_uaf_16+0x47b/0x4c0 [ 12.275996] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.276017] ? __schedule+0x10cc/0x2b60 [ 12.276041] ? __pfx_read_tsc+0x10/0x10 [ 12.276072] ? ktime_get_ts64+0x86/0x230 [ 12.276097] kunit_try_run_case+0x1a5/0x480 [ 12.276122] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.276143] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.276167] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.276189] ? __kthread_parkme+0x82/0x180 [ 12.276209] ? preempt_count_sub+0x50/0x80 [ 12.276233] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.276256] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.276279] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.276302] kthread+0x337/0x6f0 [ 12.276320] ? trace_preempt_on+0x20/0xc0 [ 12.276343] ? __pfx_kthread+0x10/0x10 [ 12.276363] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.276383] ? calculate_sigpending+0x7b/0xa0 [ 12.276407] ? __pfx_kthread+0x10/0x10 [ 12.276427] ret_from_fork+0x116/0x1d0 [ 12.276444] ? __pfx_kthread+0x10/0x10 [ 12.276464] ret_from_fork_asm+0x1a/0x30 [ 12.276496] </TASK> [ 12.276507] [ 12.289682] Allocated by task 185: [ 12.289857] kasan_save_stack+0x45/0x70 [ 12.290316] kasan_save_track+0x18/0x40 [ 12.290733] kasan_save_alloc_info+0x3b/0x50 [ 12.291116] __kasan_kmalloc+0xb7/0xc0 [ 12.291252] __kmalloc_cache_noprof+0x189/0x420 [ 12.291404] kmalloc_uaf_16+0x15b/0x4c0 [ 12.291535] kunit_try_run_case+0x1a5/0x480 [ 12.291715] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.291969] kthread+0x337/0x6f0 [ 12.292282] ret_from_fork+0x116/0x1d0 [ 12.292668] ret_from_fork_asm+0x1a/0x30 [ 12.293336] [ 12.293448] Freed by task 185: [ 12.293558] kasan_save_stack+0x45/0x70 [ 12.293910] kasan_save_track+0x18/0x40 [ 12.294307] kasan_save_free_info+0x3f/0x60 [ 12.294741] __kasan_slab_free+0x56/0x70 [ 12.295168] kfree+0x222/0x3f0 [ 12.295388] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.295529] kunit_try_run_case+0x1a5/0x480 [ 12.295786] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.296369] kthread+0x337/0x6f0 [ 12.296708] ret_from_fork+0x116/0x1d0 [ 12.297105] ret_from_fork_asm+0x1a/0x30 [ 12.297476] [ 12.297626] The buggy address belongs to the object at ffff8881025ee320 [ 12.297626] which belongs to the cache kmalloc-16 of size 16 [ 12.298424] The buggy address is located 0 bytes inside of [ 12.298424] freed 16-byte region [ffff8881025ee320, ffff8881025ee330) [ 12.299294] [ 12.299545] The buggy address belongs to the physical page: [ 12.300157] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025ee [ 12.300917] flags: 0x200000000000000(node=0|zone=2) [ 12.301104] page_type: f5(slab) [ 12.301230] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.301463] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.301705] page dumped because: kasan: bad access detected [ 12.301994] [ 12.302102] Memory state around the buggy address: [ 12.302333] ffff8881025ee200: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 12.302593] ffff8881025ee280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.303109] >ffff8881025ee300: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.303420] ^ [ 12.303620] ffff8881025ee380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.304035] ffff8881025ee400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.304334] ==================================================================