Date
July 16, 2025, 3:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.760903] ================================================================== [ 16.760966] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 16.761017] Write of size 33 at addr fff00000c6adf700 by task kunit_try_catch/186 [ 16.761070] [ 16.761100] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.761185] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.761212] Hardware name: linux,dummy-virt (DT) [ 16.761243] Call trace: [ 16.761264] show_stack+0x20/0x38 (C) [ 16.761313] dump_stack_lvl+0x8c/0xd0 [ 16.761362] print_report+0x118/0x5d0 [ 16.761410] kasan_report+0xdc/0x128 [ 16.761457] kasan_check_range+0x100/0x1a8 [ 16.761506] __asan_memset+0x34/0x78 [ 16.761548] kmalloc_uaf_memset+0x170/0x310 [ 16.761594] kunit_try_run_case+0x170/0x3f0 [ 16.761642] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.761694] kthread+0x328/0x630 [ 16.761977] ret_from_fork+0x10/0x20 [ 16.762029] [ 16.762046] Allocated by task 186: [ 16.762074] kasan_save_stack+0x3c/0x68 [ 16.762117] kasan_save_track+0x20/0x40 [ 16.762154] kasan_save_alloc_info+0x40/0x58 [ 16.762195] __kasan_kmalloc+0xd4/0xd8 [ 16.762271] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.762312] kmalloc_uaf_memset+0xb8/0x310 [ 16.762349] kunit_try_run_case+0x170/0x3f0 [ 16.762386] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.762440] kthread+0x328/0x630 [ 16.762472] ret_from_fork+0x10/0x20 [ 16.762515] [ 16.762533] Freed by task 186: [ 16.762561] kasan_save_stack+0x3c/0x68 [ 16.762597] kasan_save_track+0x20/0x40 [ 16.762634] kasan_save_free_info+0x4c/0x78 [ 16.762675] __kasan_slab_free+0x6c/0x98 [ 16.762733] kfree+0x214/0x3c8 [ 16.762773] kmalloc_uaf_memset+0x11c/0x310 [ 16.762809] kunit_try_run_case+0x170/0x3f0 [ 16.762846] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.762891] kthread+0x328/0x630 [ 16.762932] ret_from_fork+0x10/0x20 [ 16.762983] [ 16.763001] The buggy address belongs to the object at fff00000c6adf700 [ 16.763001] which belongs to the cache kmalloc-64 of size 64 [ 16.763069] The buggy address is located 0 bytes inside of [ 16.763069] freed 64-byte region [fff00000c6adf700, fff00000c6adf740) [ 16.763132] [ 16.763150] The buggy address belongs to the physical page: [ 16.763204] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106adf [ 16.763260] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.763311] page_type: f5(slab) [ 16.763358] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.763423] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.763466] page dumped because: kasan: bad access detected [ 16.763498] [ 16.763517] Memory state around the buggy address: [ 16.763561] fff00000c6adf600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.763610] fff00000c6adf680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.763659] >fff00000c6adf700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.763697] ^ [ 16.763734] fff00000c6adf780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.763776] fff00000c6adf800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.763814] ==================================================================
[ 12.849601] ================================================================== [ 12.850042] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 12.850356] Write of size 33 at addr ffff888103084480 by task kunit_try_catch/203 [ 12.850679] [ 12.850779] CPU: 1 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.850823] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.850835] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.850855] Call Trace: [ 12.850867] <TASK> [ 12.850883] dump_stack_lvl+0x73/0xb0 [ 12.850913] print_report+0xd1/0x610 [ 12.850935] ? __virt_addr_valid+0x1db/0x2d0 [ 12.850958] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.850977] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.850999] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.851019] kasan_report+0x141/0x180 [ 12.851040] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.851066] kasan_check_range+0x10c/0x1c0 [ 12.851089] __asan_memset+0x27/0x50 [ 12.851107] kmalloc_uaf_memset+0x1a3/0x360 [ 12.851127] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.851148] ? __schedule+0x10cc/0x2b60 [ 12.851170] ? __pfx_read_tsc+0x10/0x10 [ 12.851194] ? ktime_get_ts64+0x86/0x230 [ 12.851218] kunit_try_run_case+0x1a5/0x480 [ 12.851242] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.851264] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.851288] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.851310] ? __kthread_parkme+0x82/0x180 [ 12.851331] ? preempt_count_sub+0x50/0x80 [ 12.851354] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.851377] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.851400] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.851423] kthread+0x337/0x6f0 [ 12.851441] ? trace_preempt_on+0x20/0xc0 [ 12.851465] ? __pfx_kthread+0x10/0x10 [ 12.851484] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.851505] ? calculate_sigpending+0x7b/0xa0 [ 12.851528] ? __pfx_kthread+0x10/0x10 [ 12.851548] ret_from_fork+0x116/0x1d0 [ 12.851566] ? __pfx_kthread+0x10/0x10 [ 12.851586] ret_from_fork_asm+0x1a/0x30 [ 12.851616] </TASK> [ 12.851626] [ 12.863902] Allocated by task 203: [ 12.864159] kasan_save_stack+0x45/0x70 [ 12.864499] kasan_save_track+0x18/0x40 [ 12.864844] kasan_save_alloc_info+0x3b/0x50 [ 12.865242] __kasan_kmalloc+0xb7/0xc0 [ 12.865543] __kmalloc_cache_noprof+0x189/0x420 [ 12.865892] kmalloc_uaf_memset+0xa9/0x360 [ 12.866399] kunit_try_run_case+0x1a5/0x480 [ 12.866737] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.867160] kthread+0x337/0x6f0 [ 12.867467] ret_from_fork+0x116/0x1d0 [ 12.867763] ret_from_fork_asm+0x1a/0x30 [ 12.868070] [ 12.868171] Freed by task 203: [ 12.868342] kasan_save_stack+0x45/0x70 [ 12.868525] kasan_save_track+0x18/0x40 [ 12.868689] kasan_save_free_info+0x3f/0x60 [ 12.869317] __kasan_slab_free+0x56/0x70 [ 12.869634] kfree+0x222/0x3f0 [ 12.870064] kmalloc_uaf_memset+0x12b/0x360 [ 12.870271] kunit_try_run_case+0x1a5/0x480 [ 12.870578] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.871248] kthread+0x337/0x6f0 [ 12.871449] ret_from_fork+0x116/0x1d0 [ 12.871712] ret_from_fork_asm+0x1a/0x30 [ 12.872083] [ 12.872294] The buggy address belongs to the object at ffff888103084480 [ 12.872294] which belongs to the cache kmalloc-64 of size 64 [ 12.873070] The buggy address is located 0 bytes inside of [ 12.873070] freed 64-byte region [ffff888103084480, ffff8881030844c0) [ 12.873577] [ 12.873677] The buggy address belongs to the physical page: [ 12.874287] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103084 [ 12.874810] flags: 0x200000000000000(node=0|zone=2) [ 12.875239] page_type: f5(slab) [ 12.875522] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.876269] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.876575] page dumped because: kasan: bad access detected [ 12.876951] [ 12.877234] Memory state around the buggy address: [ 12.877500] ffff888103084380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.877819] ffff888103084400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.878100] >ffff888103084480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.878426] ^ [ 12.878583] ffff888103084500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.879337] ffff888103084580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.879945] ==================================================================