Date
July 10, 2025, 9:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.583466] ================================================================== [ 29.583535] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 29.583682] Read of size 1 at addr fff00000c8686b08 by task kunit_try_catch/215 [ 29.584159] [ 29.584469] CPU: 0 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250710 #1 PREEMPT [ 29.584566] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.584593] Hardware name: linux,dummy-virt (DT) [ 29.584625] Call trace: [ 29.585343] show_stack+0x20/0x38 (C) [ 29.585492] dump_stack_lvl+0x8c/0xd0 [ 29.585985] print_report+0x118/0x5d0 [ 29.586152] kasan_report+0xdc/0x128 [ 29.586199] __asan_report_load1_noabort+0x20/0x30 [ 29.586249] kmalloc_uaf+0x300/0x338 [ 29.586292] kunit_try_run_case+0x170/0x3f0 [ 29.586736] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.586809] kthread+0x328/0x630 [ 29.586880] ret_from_fork+0x10/0x20 [ 29.587250] [ 29.587269] Allocated by task 215: [ 29.587317] kasan_save_stack+0x3c/0x68 [ 29.587370] kasan_save_track+0x20/0x40 [ 29.587417] kasan_save_alloc_info+0x40/0x58 [ 29.587456] __kasan_kmalloc+0xd4/0xd8 [ 29.587904] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.587946] kmalloc_uaf+0xb8/0x338 [ 29.588199] kunit_try_run_case+0x170/0x3f0 [ 29.588248] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.588353] kthread+0x328/0x630 [ 29.588389] ret_from_fork+0x10/0x20 [ 29.588424] [ 29.588818] Freed by task 215: [ 29.588846] kasan_save_stack+0x3c/0x68 [ 29.589328] kasan_save_track+0x20/0x40 [ 29.589481] kasan_save_free_info+0x4c/0x78 [ 29.589518] __kasan_slab_free+0x6c/0x98 [ 29.589846] kfree+0x214/0x3c8 [ 29.589888] kmalloc_uaf+0x11c/0x338 [ 29.590259] kunit_try_run_case+0x170/0x3f0 [ 29.590305] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.590677] kthread+0x328/0x630 [ 29.590722] ret_from_fork+0x10/0x20 [ 29.590770] [ 29.590825] The buggy address belongs to the object at fff00000c8686b00 [ 29.590825] which belongs to the cache kmalloc-16 of size 16 [ 29.591026] The buggy address is located 8 bytes inside of [ 29.591026] freed 16-byte region [fff00000c8686b00, fff00000c8686b10) [ 29.591091] [ 29.591392] The buggy address belongs to the physical page: [ 29.591560] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xfff00000c8686a40 pfn:0x108686 [ 29.591621] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.591672] page_type: f5(slab) [ 29.591711] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 29.591762] raw: fff00000c8686a40 000000008080007f 00000000f5000000 0000000000000000 [ 29.591807] page dumped because: kasan: bad access detected [ 29.591840] [ 29.592767] Memory state around the buggy address: [ 29.592995] fff00000c8686a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 29.593048] fff00000c8686a80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 29.593094] >fff00000c8686b00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.593210] ^ [ 29.593243] fff00000c8686b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.593288] fff00000c8686c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.593644] ==================================================================
[ 25.291351] ================================================================== [ 25.292138] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 25.292602] Read of size 1 at addr ffff888105807f88 by task kunit_try_catch/232 [ 25.293210] [ 25.293335] CPU: 0 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250710 #1 PREEMPT(voluntary) [ 25.293391] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.293403] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.293427] Call Trace: [ 25.293441] <TASK> [ 25.293462] dump_stack_lvl+0x73/0xb0 [ 25.293655] print_report+0xd1/0x610 [ 25.293685] ? __virt_addr_valid+0x1db/0x2d0 [ 25.293731] ? kmalloc_uaf+0x320/0x380 [ 25.293750] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.293776] ? kmalloc_uaf+0x320/0x380 [ 25.293892] kasan_report+0x141/0x180 [ 25.293914] ? kmalloc_uaf+0x320/0x380 [ 25.293940] __asan_report_load1_noabort+0x18/0x20 [ 25.293963] kmalloc_uaf+0x320/0x380 [ 25.293983] ? __pfx_kmalloc_uaf+0x10/0x10 [ 25.294004] ? __schedule+0x10cc/0x2b60 [ 25.294027] ? __pfx_read_tsc+0x10/0x10 [ 25.294050] ? ktime_get_ts64+0x86/0x230 [ 25.294076] kunit_try_run_case+0x1a5/0x480 [ 25.294099] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.294119] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.294142] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.294165] ? __kthread_parkme+0x82/0x180 [ 25.294187] ? preempt_count_sub+0x50/0x80 [ 25.294210] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.294233] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.294258] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.294282] kthread+0x337/0x6f0 [ 25.294302] ? trace_preempt_on+0x20/0xc0 [ 25.294326] ? __pfx_kthread+0x10/0x10 [ 25.294346] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.294367] ? calculate_sigpending+0x7b/0xa0 [ 25.294392] ? __pfx_kthread+0x10/0x10 [ 25.294413] ret_from_fork+0x116/0x1d0 [ 25.294433] ? __pfx_kthread+0x10/0x10 [ 25.294454] ret_from_fork_asm+0x1a/0x30 [ 25.294486] </TASK> [ 25.294511] [ 25.306408] Allocated by task 232: [ 25.306589] kasan_save_stack+0x45/0x70 [ 25.307018] kasan_save_track+0x18/0x40 [ 25.307216] kasan_save_alloc_info+0x3b/0x50 [ 25.307413] __kasan_kmalloc+0xb7/0xc0 [ 25.308036] __kmalloc_cache_noprof+0x189/0x420 [ 25.308409] kmalloc_uaf+0xaa/0x380 [ 25.308857] kunit_try_run_case+0x1a5/0x480 [ 25.309115] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.309361] kthread+0x337/0x6f0 [ 25.309745] ret_from_fork+0x116/0x1d0 [ 25.310023] ret_from_fork_asm+0x1a/0x30 [ 25.310217] [ 25.310304] Freed by task 232: [ 25.310447] kasan_save_stack+0x45/0x70 [ 25.311057] kasan_save_track+0x18/0x40 [ 25.311394] kasan_save_free_info+0x3f/0x60 [ 25.311997] __kasan_slab_free+0x56/0x70 [ 25.312196] kfree+0x222/0x3f0 [ 25.312345] kmalloc_uaf+0x12c/0x380 [ 25.312742] kunit_try_run_case+0x1a5/0x480 [ 25.313104] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.313355] kthread+0x337/0x6f0 [ 25.313729] ret_from_fork+0x116/0x1d0 [ 25.314219] ret_from_fork_asm+0x1a/0x30 [ 25.314466] [ 25.314744] The buggy address belongs to the object at ffff888105807f80 [ 25.314744] which belongs to the cache kmalloc-16 of size 16 [ 25.315299] The buggy address is located 8 bytes inside of [ 25.315299] freed 16-byte region [ffff888105807f80, ffff888105807f90) [ 25.316291] [ 25.316389] The buggy address belongs to the physical page: [ 25.317057] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105807 [ 25.317396] flags: 0x200000000000000(node=0|zone=2) [ 25.317811] page_type: f5(slab) [ 25.318193] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 25.318817] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 25.319137] page dumped because: kasan: bad access detected [ 25.319348] [ 25.319434] Memory state around the buggy address: [ 25.319989] ffff888105807e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.320494] ffff888105807f00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.321117] >ffff888105807f80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.321595] ^ [ 25.321783] ffff888105808000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.322359] ffff888105808080: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.322930] ==================================================================