Date
July 4, 2025, 11:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.568412] ================================================================== [ 29.568537] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 29.568592] Read of size 16 at addr fff00000c5a48a00 by task kunit_try_catch/201 [ 29.568855] [ 29.568947] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4-next-20250704 #1 PREEMPT [ 29.569050] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.569142] Hardware name: linux,dummy-virt (DT) [ 29.569222] Call trace: [ 29.569247] show_stack+0x20/0x38 (C) [ 29.569331] dump_stack_lvl+0x8c/0xd0 [ 29.569377] print_report+0x118/0x608 [ 29.569423] kasan_report+0xdc/0x128 [ 29.569611] __asan_report_load16_noabort+0x20/0x30 [ 29.569693] kmalloc_uaf_16+0x3bc/0x438 [ 29.569876] kunit_try_run_case+0x170/0x3f0 [ 29.570022] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.570076] kthread+0x328/0x630 [ 29.570126] ret_from_fork+0x10/0x20 [ 29.570173] [ 29.570192] Allocated by task 201: [ 29.570220] kasan_save_stack+0x3c/0x68 [ 29.570418] kasan_save_track+0x20/0x40 [ 29.570492] kasan_save_alloc_info+0x40/0x58 [ 29.570623] __kasan_kmalloc+0xd4/0xd8 [ 29.570829] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.570909] kmalloc_uaf_16+0x140/0x438 [ 29.571103] kunit_try_run_case+0x170/0x3f0 [ 29.571294] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.571348] kthread+0x328/0x630 [ 29.571524] ret_from_fork+0x10/0x20 [ 29.571683] [ 29.571787] Freed by task 201: [ 29.571916] kasan_save_stack+0x3c/0x68 [ 29.572011] kasan_save_track+0x20/0x40 [ 29.572076] kasan_save_free_info+0x4c/0x78 [ 29.572182] __kasan_slab_free+0x6c/0x98 [ 29.572223] kfree+0x214/0x3c8 [ 29.572294] kmalloc_uaf_16+0x190/0x438 [ 29.572561] kunit_try_run_case+0x170/0x3f0 [ 29.572692] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.572788] kthread+0x328/0x630 [ 29.572950] ret_from_fork+0x10/0x20 [ 29.573181] [ 29.573231] The buggy address belongs to the object at fff00000c5a48a00 [ 29.573231] which belongs to the cache kmalloc-16 of size 16 [ 29.573297] The buggy address is located 0 bytes inside of [ 29.573297] freed 16-byte region [fff00000c5a48a00, fff00000c5a48a10) [ 29.573362] [ 29.573383] The buggy address belongs to the physical page: [ 29.573591] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a48 [ 29.573768] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.573882] page_type: f5(slab) [ 29.574049] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 29.574204] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 29.574302] page dumped because: kasan: bad access detected [ 29.574461] [ 29.574481] Memory state around the buggy address: [ 29.574512] fff00000c5a48900: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 29.574697] fff00000c5a48980: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 29.574868] >fff00000c5a48a00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.574975] ^ [ 29.575082] fff00000c5a48a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.575169] fff00000c5a48b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.575282] ==================================================================
[ 24.911536] ================================================================== [ 24.912011] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 24.912534] Read of size 16 at addr ffff88810527f2a0 by task kunit_try_catch/217 [ 24.913169] [ 24.913306] CPU: 1 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4-next-20250704 #1 PREEMPT(voluntary) [ 24.913362] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.913376] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.913414] Call Trace: [ 24.913428] <TASK> [ 24.913448] dump_stack_lvl+0x73/0xb0 [ 24.913478] print_report+0xd1/0x650 [ 24.913503] ? __virt_addr_valid+0x1db/0x2d0 [ 24.913530] ? kmalloc_uaf_16+0x47b/0x4c0 [ 24.913553] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.913581] ? kmalloc_uaf_16+0x47b/0x4c0 [ 24.913603] kasan_report+0x141/0x180 [ 24.913627] ? kmalloc_uaf_16+0x47b/0x4c0 [ 24.913654] __asan_report_load16_noabort+0x18/0x20 [ 24.913680] kmalloc_uaf_16+0x47b/0x4c0 [ 24.913703] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 24.913726] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 24.913754] ? trace_hardirqs_on+0x37/0xe0 [ 24.913781] ? __pfx_read_tsc+0x10/0x10 [ 24.913805] ? ktime_get_ts64+0x86/0x230 [ 24.913832] kunit_try_run_case+0x1a5/0x480 [ 24.913861] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.914042] ? queued_spin_lock_slowpath+0x116/0xb40 [ 24.914081] ? __kthread_parkme+0x82/0x180 [ 24.914106] ? preempt_count_sub+0x50/0x80 [ 24.914133] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.914214] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.914243] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.914271] kthread+0x337/0x6f0 [ 24.914293] ? trace_preempt_on+0x20/0xc0 [ 24.914319] ? __pfx_kthread+0x10/0x10 [ 24.914342] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.914367] ? calculate_sigpending+0x7b/0xa0 [ 24.914406] ? __pfx_kthread+0x10/0x10 [ 24.914430] ret_from_fork+0x116/0x1d0 [ 24.914452] ? __pfx_kthread+0x10/0x10 [ 24.914475] ret_from_fork_asm+0x1a/0x30 [ 24.914510] </TASK> [ 24.914524] [ 24.925481] Allocated by task 217: [ 24.925691] kasan_save_stack+0x45/0x70 [ 24.926265] kasan_save_track+0x18/0x40 [ 24.926481] kasan_save_alloc_info+0x3b/0x50 [ 24.926800] __kasan_kmalloc+0xb7/0xc0 [ 24.927023] __kmalloc_cache_noprof+0x189/0x420 [ 24.927434] kmalloc_uaf_16+0x15b/0x4c0 [ 24.927635] kunit_try_run_case+0x1a5/0x480 [ 24.927819] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.928422] kthread+0x337/0x6f0 [ 24.928722] ret_from_fork+0x116/0x1d0 [ 24.929039] ret_from_fork_asm+0x1a/0x30 [ 24.929269] [ 24.929512] Freed by task 217: [ 24.929644] kasan_save_stack+0x45/0x70 [ 24.930058] kasan_save_track+0x18/0x40 [ 24.930353] kasan_save_free_info+0x3f/0x60 [ 24.930533] __kasan_slab_free+0x56/0x70 [ 24.930977] kfree+0x222/0x3f0 [ 24.931360] kmalloc_uaf_16+0x1d6/0x4c0 [ 24.931571] kunit_try_run_case+0x1a5/0x480 [ 24.931727] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.932133] kthread+0x337/0x6f0 [ 24.932443] ret_from_fork+0x116/0x1d0 [ 24.932592] ret_from_fork_asm+0x1a/0x30 [ 24.932801] [ 24.932894] The buggy address belongs to the object at ffff88810527f2a0 [ 24.932894] which belongs to the cache kmalloc-16 of size 16 [ 24.934078] The buggy address is located 0 bytes inside of [ 24.934078] freed 16-byte region [ffff88810527f2a0, ffff88810527f2b0) [ 24.934888] [ 24.935004] The buggy address belongs to the physical page: [ 24.935239] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10527f [ 24.935598] flags: 0x200000000000000(node=0|zone=2) [ 24.935818] page_type: f5(slab) [ 24.935963] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 24.936354] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 24.936887] page dumped because: kasan: bad access detected [ 24.937118] [ 24.937277] Memory state around the buggy address: [ 24.937469] ffff88810527f180: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.937806] ffff88810527f200: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.938132] >ffff88810527f280: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 24.938502] ^ [ 24.938710] ffff88810527f300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.938939] ffff88810527f380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.939495] ==================================================================