Date
July 25, 2025, 3:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.521626] ================================================================== [ 32.521703] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 32.521765] Write of size 33 at addr fff00000c9b0bf00 by task kunit_try_catch/218 [ 32.521816] [ 32.521848] CPU: 1 UID: 0 PID: 218 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250725 #1 PREEMPT [ 32.521935] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 32.521965] Hardware name: linux,dummy-virt (DT) [ 32.522287] Call trace: [ 32.522329] show_stack+0x20/0x38 (C) [ 32.522384] dump_stack_lvl+0x8c/0xd0 [ 32.522462] print_report+0x118/0x5e8 [ 32.522507] kasan_report+0xdc/0x128 [ 32.522561] kasan_check_range+0x100/0x1a8 [ 32.522613] __asan_memset+0x34/0x78 [ 32.523742] kmalloc_uaf_memset+0x170/0x310 [ 32.524068] kunit_try_run_case+0x170/0x3f0 [ 32.524214] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.524336] kthread+0x328/0x630 [ 32.524739] ret_from_fork+0x10/0x20 [ 32.525090] [ 32.525170] Allocated by task 218: [ 32.525233] kasan_save_stack+0x3c/0x68 [ 32.525342] kasan_save_track+0x20/0x40 [ 32.525711] kasan_save_alloc_info+0x40/0x58 [ 32.526049] __kasan_kmalloc+0xd4/0xd8 [ 32.526208] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.526434] kmalloc_uaf_memset+0xb8/0x310 [ 32.526725] kunit_try_run_case+0x170/0x3f0 [ 32.526957] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.527197] kthread+0x328/0x630 [ 32.527373] ret_from_fork+0x10/0x20 [ 32.527467] [ 32.527494] Freed by task 218: [ 32.527521] kasan_save_stack+0x3c/0x68 [ 32.527558] kasan_save_track+0x20/0x40 [ 32.528132] kasan_save_free_info+0x4c/0x78 [ 32.528382] __kasan_slab_free+0x7c/0xa8 [ 32.528535] kfree+0x214/0x3c8 [ 32.528669] kmalloc_uaf_memset+0x11c/0x310 [ 32.528712] kunit_try_run_case+0x170/0x3f0 [ 32.528806] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.529010] kthread+0x328/0x630 [ 32.529241] ret_from_fork+0x10/0x20 [ 32.529356] [ 32.529378] The buggy address belongs to the object at fff00000c9b0bf00 [ 32.529378] which belongs to the cache kmalloc-64 of size 64 [ 32.530140] The buggy address is located 0 bytes inside of [ 32.530140] freed 64-byte region [fff00000c9b0bf00, fff00000c9b0bf40) [ 32.530224] [ 32.530306] The buggy address belongs to the physical page: [ 32.530457] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109b0b [ 32.530959] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.531090] page_type: f5(slab) [ 32.531310] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 32.531541] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 32.531909] page dumped because: kasan: bad access detected [ 32.532018] [ 32.532094] Memory state around the buggy address: [ 32.532396] fff00000c9b0be00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.532501] fff00000c9b0be80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.532549] >fff00000c9b0bf00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.532659] ^ [ 32.532722] fff00000c9b0bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.532774] fff00000c9b0c000: 00 00 00 fc fc fc fc fc 00 00 00 02 fc fc fc fc [ 32.532816] ==================================================================
[ 26.040572] ================================================================== [ 26.041220] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 26.041474] Write of size 33 at addr ffff888105809b00 by task kunit_try_catch/235 [ 26.041707] [ 26.042102] CPU: 0 UID: 0 PID: 235 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary) [ 26.042159] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.042172] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.042192] Call Trace: [ 26.042205] <TASK> [ 26.042229] dump_stack_lvl+0x73/0xb0 [ 26.042259] print_report+0xd1/0x640 [ 26.042282] ? __virt_addr_valid+0x1db/0x2d0 [ 26.042305] ? kmalloc_uaf_memset+0x1a3/0x360 [ 26.042326] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.042352] ? kmalloc_uaf_memset+0x1a3/0x360 [ 26.042374] kasan_report+0x141/0x180 [ 26.042396] ? kmalloc_uaf_memset+0x1a3/0x360 [ 26.042422] kasan_check_range+0x10c/0x1c0 [ 26.042446] __asan_memset+0x27/0x50 [ 26.042469] kmalloc_uaf_memset+0x1a3/0x360 [ 26.042490] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 26.042513] ? __schedule+0x10da/0x2b60 [ 26.042534] ? __pfx_read_tsc+0x10/0x10 [ 26.042555] ? ktime_get_ts64+0x86/0x230 [ 26.042579] kunit_try_run_case+0x1a5/0x480 [ 26.042603] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.042625] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.042647] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.042673] ? __kthread_parkme+0x82/0x180 [ 26.042694] ? preempt_count_sub+0x50/0x80 [ 26.042717] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.042740] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.042764] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.042986] kthread+0x337/0x6f0 [ 26.043016] ? trace_preempt_on+0x20/0xc0 [ 26.043041] ? __pfx_kthread+0x10/0x10 [ 26.043062] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.043087] ? calculate_sigpending+0x7b/0xa0 [ 26.043110] ? __pfx_kthread+0x10/0x10 [ 26.043146] ret_from_fork+0x116/0x1d0 [ 26.043165] ? __pfx_kthread+0x10/0x10 [ 26.043186] ret_from_fork_asm+0x1a/0x30 [ 26.043217] </TASK> [ 26.043228] [ 26.059674] Allocated by task 235: [ 26.060077] kasan_save_stack+0x45/0x70 [ 26.060385] kasan_save_track+0x18/0x40 [ 26.060525] kasan_save_alloc_info+0x3b/0x50 [ 26.060674] __kasan_kmalloc+0xb7/0xc0 [ 26.061102] __kmalloc_cache_noprof+0x189/0x420 [ 26.061582] kmalloc_uaf_memset+0xa9/0x360 [ 26.062191] kunit_try_run_case+0x1a5/0x480 [ 26.062575] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.063145] kthread+0x337/0x6f0 [ 26.063524] ret_from_fork+0x116/0x1d0 [ 26.063930] ret_from_fork_asm+0x1a/0x30 [ 26.064095] [ 26.064262] Freed by task 235: [ 26.064548] kasan_save_stack+0x45/0x70 [ 26.064900] kasan_save_track+0x18/0x40 [ 26.065236] kasan_save_free_info+0x3f/0x60 [ 26.065388] __kasan_slab_free+0x5e/0x80 [ 26.065525] kfree+0x222/0x3f0 [ 26.065641] kmalloc_uaf_memset+0x12b/0x360 [ 26.066081] kunit_try_run_case+0x1a5/0x480 [ 26.066548] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.067167] kthread+0x337/0x6f0 [ 26.067515] ret_from_fork+0x116/0x1d0 [ 26.067933] ret_from_fork_asm+0x1a/0x30 [ 26.068477] [ 26.068672] The buggy address belongs to the object at ffff888105809b00 [ 26.068672] which belongs to the cache kmalloc-64 of size 64 [ 26.069849] The buggy address is located 0 bytes inside of [ 26.069849] freed 64-byte region [ffff888105809b00, ffff888105809b40) [ 26.070444] [ 26.070521] The buggy address belongs to the physical page: [ 26.070698] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105809 [ 26.071447] flags: 0x200000000000000(node=0|zone=2) [ 26.072000] page_type: f5(slab) [ 26.072373] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 26.073172] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 26.073929] page dumped because: kasan: bad access detected [ 26.074259] [ 26.074411] Memory state around the buggy address: [ 26.074889] ffff888105809a00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 26.075398] ffff888105809a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.075628] >ffff888105809b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.076055] ^ [ 26.076410] ffff888105809b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.077224] ffff888105809c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.077893] ==================================================================