Date
July 9, 2025, 2:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.976535] ================================================================== [ 16.976986] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 16.977063] Read of size 16 at addr fff00000c3f1d760 by task kunit_try_catch/168 [ 16.977571] [ 16.977681] CPU: 0 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.977830] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.979013] Hardware name: linux,dummy-virt (DT) [ 16.979398] Call trace: [ 16.979439] show_stack+0x20/0x38 (C) [ 16.979496] dump_stack_lvl+0x8c/0xd0 [ 16.979546] print_report+0x118/0x608 [ 16.979599] kasan_report+0xdc/0x128 [ 16.980446] __asan_report_load16_noabort+0x20/0x30 [ 16.980514] kmalloc_uaf_16+0x3bc/0x438 [ 16.980577] kunit_try_run_case+0x170/0x3f0 [ 16.980627] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.981039] kthread+0x328/0x630 [ 16.981105] ret_from_fork+0x10/0x20 [ 16.981156] [ 16.981174] Allocated by task 168: [ 16.981204] kasan_save_stack+0x3c/0x68 [ 16.981367] kasan_save_track+0x20/0x40 [ 16.981412] kasan_save_alloc_info+0x40/0x58 [ 16.981506] __kasan_kmalloc+0xd4/0xd8 [ 16.981543] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.981908] kmalloc_uaf_16+0x140/0x438 [ 16.982028] kunit_try_run_case+0x170/0x3f0 [ 16.982291] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.982340] kthread+0x328/0x630 [ 16.982374] ret_from_fork+0x10/0x20 [ 16.982569] [ 16.982593] Freed by task 168: [ 16.982622] kasan_save_stack+0x3c/0x68 [ 16.982664] kasan_save_track+0x20/0x40 [ 16.983065] kasan_save_free_info+0x4c/0x78 [ 16.983363] __kasan_slab_free+0x6c/0x98 [ 16.984337] kfree+0x214/0x3c8 [ 16.984374] kmalloc_uaf_16+0x190/0x438 [ 16.984419] kunit_try_run_case+0x170/0x3f0 [ 16.984457] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.984803] kthread+0x328/0x630 [ 16.984964] ret_from_fork+0x10/0x20 [ 16.985003] [ 16.985023] The buggy address belongs to the object at fff00000c3f1d760 [ 16.985023] which belongs to the cache kmalloc-16 of size 16 [ 16.985132] The buggy address is located 0 bytes inside of [ 16.985132] freed 16-byte region [fff00000c3f1d760, fff00000c3f1d770) [ 16.985399] [ 16.985426] The buggy address belongs to the physical page: [ 16.985618] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f1d [ 16.985756] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.985830] page_type: f5(slab) [ 16.985963] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.986044] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.986164] page dumped because: kasan: bad access detected [ 16.986213] [ 16.986239] Memory state around the buggy address: [ 16.986274] fff00000c3f1d600: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 02 fc fc [ 16.986337] fff00000c3f1d680: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.986715] >fff00000c3f1d700: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 16.986871] ^ [ 16.986949] fff00000c3f1d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.987025] fff00000c3f1d800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.987136] ==================================================================
[ 12.776710] ================================================================== [ 12.777677] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.777941] Read of size 16 at addr ffff8881024345e0 by task kunit_try_catch/185 [ 12.778224] [ 12.778349] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.778396] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.778408] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.778429] Call Trace: [ 12.778440] <TASK> [ 12.778455] dump_stack_lvl+0x73/0xb0 [ 12.778484] print_report+0xd1/0x650 [ 12.778506] ? __virt_addr_valid+0x1db/0x2d0 [ 12.778528] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.778548] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.778570] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.778591] kasan_report+0x141/0x180 [ 12.778624] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.778648] __asan_report_load16_noabort+0x18/0x20 [ 12.778672] kmalloc_uaf_16+0x47b/0x4c0 [ 12.778693] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.778714] ? __schedule+0x10cc/0x2b60 [ 12.778736] ? __pfx_read_tsc+0x10/0x10 [ 12.778757] ? ktime_get_ts64+0x86/0x230 [ 12.778792] kunit_try_run_case+0x1a5/0x480 [ 12.778831] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.778854] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.778877] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.778900] ? __kthread_parkme+0x82/0x180 [ 12.778932] ? preempt_count_sub+0x50/0x80 [ 12.778957] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.778981] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.779004] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.779031] kthread+0x337/0x6f0 [ 12.779050] ? trace_preempt_on+0x20/0xc0 [ 12.779074] ? __pfx_kthread+0x10/0x10 [ 12.779093] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.779114] ? calculate_sigpending+0x7b/0xa0 [ 12.779138] ? __pfx_kthread+0x10/0x10 [ 12.779158] ret_from_fork+0x116/0x1d0 [ 12.779177] ? __pfx_kthread+0x10/0x10 [ 12.779196] ret_from_fork_asm+0x1a/0x30 [ 12.779227] </TASK> [ 12.779237] [ 12.786534] Allocated by task 185: [ 12.786725] kasan_save_stack+0x45/0x70 [ 12.787081] kasan_save_track+0x18/0x40 [ 12.787240] kasan_save_alloc_info+0x3b/0x50 [ 12.787388] __kasan_kmalloc+0xb7/0xc0 [ 12.787520] __kmalloc_cache_noprof+0x189/0x420 [ 12.787688] kmalloc_uaf_16+0x15b/0x4c0 [ 12.787823] kunit_try_run_case+0x1a5/0x480 [ 12.788491] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.788994] kthread+0x337/0x6f0 [ 12.789163] ret_from_fork+0x116/0x1d0 [ 12.789351] ret_from_fork_asm+0x1a/0x30 [ 12.789548] [ 12.789721] Freed by task 185: [ 12.790044] kasan_save_stack+0x45/0x70 [ 12.790217] kasan_save_track+0x18/0x40 [ 12.790415] kasan_save_free_info+0x3f/0x60 [ 12.790638] __kasan_slab_free+0x56/0x70 [ 12.791250] kfree+0x222/0x3f0 [ 12.791723] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.792008] kunit_try_run_case+0x1a5/0x480 [ 12.792271] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.792501] kthread+0x337/0x6f0 [ 12.792655] ret_from_fork+0x116/0x1d0 [ 12.793084] ret_from_fork_asm+0x1a/0x30 [ 12.793501] [ 12.793578] The buggy address belongs to the object at ffff8881024345e0 [ 12.793578] which belongs to the cache kmalloc-16 of size 16 [ 12.794528] The buggy address is located 0 bytes inside of [ 12.794528] freed 16-byte region [ffff8881024345e0, ffff8881024345f0) [ 12.795001] [ 12.795204] The buggy address belongs to the physical page: [ 12.795530] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102434 [ 12.796044] flags: 0x200000000000000(node=0|zone=2) [ 12.796365] page_type: f5(slab) [ 12.796580] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.796952] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.797405] page dumped because: kasan: bad access detected [ 12.797622] [ 12.797887] Memory state around the buggy address: [ 12.798177] ffff888102434480: 00 01 fc fc 00 01 fc fc 00 04 fc fc 00 04 fc fc [ 12.798494] ffff888102434500: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 12.798790] >ffff888102434580: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 12.799260] ^ [ 12.799621] ffff888102434600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.800188] ffff888102434680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.800693] ==================================================================