Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.845622] ================================================================== [ 22.845811] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 22.846792] Write of size 33 at addr fff00000c76c4680 by task kunit_try_catch/190 [ 22.847664] [ 22.847876] CPU: 1 UID: 0 PID: 190 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT [ 22.848168] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.848238] Hardware name: linux,dummy-virt (DT) [ 22.848326] Call trace: [ 22.848389] show_stack+0x20/0x38 (C) [ 22.849002] dump_stack_lvl+0x8c/0xd0 [ 22.849154] print_report+0x118/0x608 [ 22.849376] kasan_report+0xdc/0x128 [ 22.849934] kasan_check_range+0x100/0x1a8 [ 22.850154] __asan_memset+0x34/0x78 [ 22.850302] kmalloc_uaf_memset+0x170/0x310 [ 22.850438] kunit_try_run_case+0x170/0x3f0 [ 22.850577] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.850706] kthread+0x328/0x630 [ 22.850798] ret_from_fork+0x10/0x20 [ 22.850914] [ 22.850953] Allocated by task 190: [ 22.851021] kasan_save_stack+0x3c/0x68 [ 22.851126] kasan_save_track+0x20/0x40 [ 22.851224] kasan_save_alloc_info+0x40/0x58 [ 22.851329] __kasan_kmalloc+0xd4/0xd8 [ 22.852038] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.852643] kmalloc_uaf_memset+0xb8/0x310 [ 22.852844] kunit_try_run_case+0x170/0x3f0 [ 22.852955] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.853069] kthread+0x328/0x630 [ 22.853157] ret_from_fork+0x10/0x20 [ 22.853241] [ 22.853289] Freed by task 190: [ 22.853363] kasan_save_stack+0x3c/0x68 [ 22.853848] kasan_save_track+0x20/0x40 [ 22.854311] kasan_save_free_info+0x4c/0x78 [ 22.854834] __kasan_slab_free+0x6c/0x98 [ 22.855125] kfree+0x214/0x3c8 [ 22.855222] kmalloc_uaf_memset+0x11c/0x310 [ 22.855315] kunit_try_run_case+0x170/0x3f0 [ 22.855736] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.856091] kthread+0x328/0x630 [ 22.856211] ret_from_fork+0x10/0x20 [ 22.856314] [ 22.856462] The buggy address belongs to the object at fff00000c76c4680 [ 22.856462] which belongs to the cache kmalloc-64 of size 64 [ 22.857017] The buggy address is located 0 bytes inside of [ 22.857017] freed 64-byte region [fff00000c76c4680, fff00000c76c46c0) [ 22.857247] [ 22.857306] The buggy address belongs to the physical page: [ 22.857462] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1076c4 [ 22.857592] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.857986] page_type: f5(slab) [ 22.858332] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 22.858537] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 22.858646] page dumped because: kasan: bad access detected [ 22.858972] [ 22.859017] Memory state around the buggy address: [ 22.859093] fff00000c76c4580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.859542] fff00000c76c4600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.859688] >fff00000c76c4680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.859854] ^ [ 22.860242] fff00000c76c4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.860599] fff00000c76c4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.860802] ==================================================================
[ 14.038978] ================================================================== [ 14.039421] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 14.040189] Write of size 33 at addr ffff888102da2000 by task kunit_try_catch/206 [ 14.040427] [ 14.040537] CPU: 1 UID: 0 PID: 206 Comm: kunit_try_catch Tainted: G B N 6.15.2-rc1 #1 PREEMPT(voluntary) [ 14.040621] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.040641] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.040674] Call Trace: [ 14.040698] <TASK> [ 14.040728] dump_stack_lvl+0x73/0xb0 [ 14.040772] print_report+0xd1/0x650 [ 14.040796] ? __virt_addr_valid+0x1db/0x2d0 [ 14.040817] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.040838] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.040858] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.040878] kasan_report+0x141/0x180 [ 14.040899] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.040923] kasan_check_range+0x10c/0x1c0 [ 14.040941] __asan_memset+0x27/0x50 [ 14.040961] kmalloc_uaf_memset+0x1a3/0x360 [ 14.040980] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 14.041001] ? __schedule+0x10cc/0x2b30 [ 14.041021] ? __pfx_read_tsc+0x10/0x10 [ 14.041040] ? ktime_get_ts64+0x86/0x230 [ 14.041065] kunit_try_run_case+0x1a5/0x480 [ 14.041088] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.041108] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.041130] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.041151] ? __kthread_parkme+0x82/0x180 [ 14.041172] ? preempt_count_sub+0x50/0x80 [ 14.041195] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.041217] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.041238] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.041258] kthread+0x337/0x6f0 [ 14.041275] ? trace_preempt_on+0x20/0xc0 [ 14.041297] ? __pfx_kthread+0x10/0x10 [ 14.041314] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.041333] ? calculate_sigpending+0x7b/0xa0 [ 14.041353] ? __pfx_kthread+0x10/0x10 [ 14.041371] ret_from_fork+0x41/0x80 [ 14.041390] ? __pfx_kthread+0x10/0x10 [ 14.041407] ret_from_fork_asm+0x1a/0x30 [ 14.041436] </TASK> [ 14.041448] [ 14.053021] Allocated by task 206: [ 14.053326] kasan_save_stack+0x45/0x70 [ 14.053714] kasan_save_track+0x18/0x40 [ 14.054141] kasan_save_alloc_info+0x3b/0x50 [ 14.054444] __kasan_kmalloc+0xb7/0xc0 [ 14.054893] __kmalloc_cache_noprof+0x189/0x420 [ 14.055266] kmalloc_uaf_memset+0xa9/0x360 [ 14.055490] kunit_try_run_case+0x1a5/0x480 [ 14.055753] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.056136] kthread+0x337/0x6f0 [ 14.056293] ret_from_fork+0x41/0x80 [ 14.057094] ret_from_fork_asm+0x1a/0x30 [ 14.057485] [ 14.057846] Freed by task 206: [ 14.058021] kasan_save_stack+0x45/0x70 [ 14.058353] kasan_save_track+0x18/0x40 [ 14.058783] kasan_save_free_info+0x3f/0x60 [ 14.059056] __kasan_slab_free+0x56/0x70 [ 14.059414] kfree+0x222/0x3f0 [ 14.059873] kmalloc_uaf_memset+0x12b/0x360 [ 14.060105] kunit_try_run_case+0x1a5/0x480 [ 14.060441] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.060979] kthread+0x337/0x6f0 [ 14.061214] ret_from_fork+0x41/0x80 [ 14.061534] ret_from_fork_asm+0x1a/0x30 [ 14.062319] [ 14.062486] The buggy address belongs to the object at ffff888102da2000 [ 14.062486] which belongs to the cache kmalloc-64 of size 64 [ 14.063309] The buggy address is located 0 bytes inside of [ 14.063309] freed 64-byte region [ffff888102da2000, ffff888102da2040) [ 14.064176] [ 14.064378] The buggy address belongs to the physical page: [ 14.064891] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102da2 [ 14.065177] flags: 0x200000000000000(node=0|zone=2) [ 14.065590] page_type: f5(slab) [ 14.066034] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 14.066359] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 14.067154] page dumped because: kasan: bad access detected [ 14.067473] [ 14.067596] Memory state around the buggy address: [ 14.068584] ffff888102da1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.069186] ffff888102da1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.069791] >ffff888102da2000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.070322] ^ [ 14.070611] ffff888102da2080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.071123] ffff888102da2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.071609] ==================================================================