Date
July 12, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.716665] ================================================================== [ 16.716736] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 16.716786] Read of size 16 at addr fff00000c45d1aa0 by task kunit_try_catch/168 [ 16.716887] [ 16.716946] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.717026] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.717052] Hardware name: linux,dummy-virt (DT) [ 16.717082] Call trace: [ 16.717102] show_stack+0x20/0x38 (C) [ 16.717190] dump_stack_lvl+0x8c/0xd0 [ 16.717238] print_report+0x118/0x5d0 [ 16.717324] kasan_report+0xdc/0x128 [ 16.717400] __asan_report_load16_noabort+0x20/0x30 [ 16.717471] kmalloc_uaf_16+0x3bc/0x438 [ 16.717516] kunit_try_run_case+0x170/0x3f0 [ 16.717561] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.717620] kthread+0x328/0x630 [ 16.717688] ret_from_fork+0x10/0x20 [ 16.717754] [ 16.717771] Allocated by task 168: [ 16.717798] kasan_save_stack+0x3c/0x68 [ 16.717837] kasan_save_track+0x20/0x40 [ 16.717893] kasan_save_alloc_info+0x40/0x58 [ 16.717938] __kasan_kmalloc+0xd4/0xd8 [ 16.717972] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.718009] kmalloc_uaf_16+0x140/0x438 [ 16.718212] kunit_try_run_case+0x170/0x3f0 [ 16.718282] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.718326] kthread+0x328/0x630 [ 16.718408] ret_from_fork+0x10/0x20 [ 16.718443] [ 16.718461] Freed by task 168: [ 16.718492] kasan_save_stack+0x3c/0x68 [ 16.718529] kasan_save_track+0x20/0x40 [ 16.718564] kasan_save_free_info+0x4c/0x78 [ 16.718602] __kasan_slab_free+0x6c/0x98 [ 16.718786] kfree+0x214/0x3c8 [ 16.718846] kmalloc_uaf_16+0x190/0x438 [ 16.718881] kunit_try_run_case+0x170/0x3f0 [ 16.718917] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.719002] kthread+0x328/0x630 [ 16.719047] ret_from_fork+0x10/0x20 [ 16.719082] [ 16.719100] The buggy address belongs to the object at fff00000c45d1aa0 [ 16.719100] which belongs to the cache kmalloc-16 of size 16 [ 16.719194] The buggy address is located 0 bytes inside of [ 16.719194] freed 16-byte region [fff00000c45d1aa0, fff00000c45d1ab0) [ 16.719289] [ 16.719322] The buggy address belongs to the physical page: [ 16.719355] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1045d1 [ 16.719433] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.719481] page_type: f5(slab) [ 16.719721] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.719873] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.719925] page dumped because: kasan: bad access detected [ 16.719982] [ 16.720252] Memory state around the buggy address: [ 16.720334] fff00000c45d1980: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 16.720435] fff00000c45d1a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.720513] >fff00000c45d1a80: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 16.720556] ^ [ 16.720586] fff00000c45d1b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.720735] fff00000c45d1b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.720881] ==================================================================
[ 13.006449] ================================================================== [ 13.006906] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 13.007334] Read of size 16 at addr ffff888101c9b460 by task kunit_try_catch/185 [ 13.007914] [ 13.008018] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.008283] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.008298] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.008329] Call Trace: [ 13.008342] <TASK> [ 13.008361] dump_stack_lvl+0x73/0xb0 [ 13.008409] print_report+0xd1/0x610 [ 13.008614] ? __virt_addr_valid+0x1db/0x2d0 [ 13.008641] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.008674] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.008698] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.008718] kasan_report+0x141/0x180 [ 13.008739] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.008765] __asan_report_load16_noabort+0x18/0x20 [ 13.008790] kmalloc_uaf_16+0x47b/0x4c0 [ 13.008810] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 13.008832] ? __schedule+0x10cc/0x2b60 [ 13.008855] ? __pfx_read_tsc+0x10/0x10 [ 13.008877] ? ktime_get_ts64+0x86/0x230 [ 13.008903] kunit_try_run_case+0x1a5/0x480 [ 13.008929] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.008952] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.008976] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.009111] ? __kthread_parkme+0x82/0x180 [ 13.009134] ? preempt_count_sub+0x50/0x80 [ 13.009172] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.009197] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.009222] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.009247] kthread+0x337/0x6f0 [ 13.009275] ? trace_preempt_on+0x20/0xc0 [ 13.009300] ? __pfx_kthread+0x10/0x10 [ 13.009321] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.009344] ? calculate_sigpending+0x7b/0xa0 [ 13.009374] ? __pfx_kthread+0x10/0x10 [ 13.009395] ret_from_fork+0x116/0x1d0 [ 13.009414] ? __pfx_kthread+0x10/0x10 [ 13.009434] ret_from_fork_asm+0x1a/0x30 [ 13.009466] </TASK> [ 13.009478] [ 13.018827] Allocated by task 185: [ 13.019524] kasan_save_stack+0x45/0x70 [ 13.019717] kasan_save_track+0x18/0x40 [ 13.019911] kasan_save_alloc_info+0x3b/0x50 [ 13.020296] __kasan_kmalloc+0xb7/0xc0 [ 13.020452] __kmalloc_cache_noprof+0x189/0x420 [ 13.020683] kmalloc_uaf_16+0x15b/0x4c0 [ 13.020864] kunit_try_run_case+0x1a5/0x480 [ 13.021064] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.021631] kthread+0x337/0x6f0 [ 13.021787] ret_from_fork+0x116/0x1d0 [ 13.021959] ret_from_fork_asm+0x1a/0x30 [ 13.022472] [ 13.022567] Freed by task 185: [ 13.022716] kasan_save_stack+0x45/0x70 [ 13.022895] kasan_save_track+0x18/0x40 [ 13.023289] kasan_save_free_info+0x3f/0x60 [ 13.023508] __kasan_slab_free+0x56/0x70 [ 13.023783] kfree+0x222/0x3f0 [ 13.024098] kmalloc_uaf_16+0x1d6/0x4c0 [ 13.024287] kunit_try_run_case+0x1a5/0x480 [ 13.024684] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.025109] kthread+0x337/0x6f0 [ 13.025293] ret_from_fork+0x116/0x1d0 [ 13.025575] ret_from_fork_asm+0x1a/0x30 [ 13.025770] [ 13.025871] The buggy address belongs to the object at ffff888101c9b460 [ 13.025871] which belongs to the cache kmalloc-16 of size 16 [ 13.026622] The buggy address is located 0 bytes inside of [ 13.026622] freed 16-byte region [ffff888101c9b460, ffff888101c9b470) [ 13.027501] [ 13.027610] The buggy address belongs to the physical page: [ 13.027849] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c9b [ 13.028250] flags: 0x200000000000000(node=0|zone=2) [ 13.028573] page_type: f5(slab) [ 13.028704] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.029046] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.029703] page dumped because: kasan: bad access detected [ 13.029931] [ 13.030026] Memory state around the buggy address: [ 13.030409] ffff888101c9b300: 00 02 fc fc 00 05 fc fc 00 02 fc fc 00 02 fc fc [ 13.030722] ffff888101c9b380: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 13.031010] >ffff888101c9b400: fa fb fc fc 00 05 fc fc 00 00 fc fc fa fb fc fc [ 13.031304] ^ [ 13.031563] ffff888101c9b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.031854] ffff888101c9b500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.032142] ==================================================================