Date
June 19, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.219266] ================================================================== [ 32.219472] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x174/0x300 [ 32.219645] Read of size 1 at addr fff00000c7751000 by task kunit_try_catch/226 [ 32.219778] [ 32.220773] CPU: 1 UID: 0 PID: 226 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT [ 32.221103] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.221170] Hardware name: linux,dummy-virt (DT) [ 32.221245] Call trace: [ 32.221304] show_stack+0x20/0x38 (C) [ 32.221672] dump_stack_lvl+0x8c/0xd0 [ 32.221838] print_report+0x118/0x608 [ 32.221998] kasan_report+0xdc/0x128 [ 32.222321] __kasan_check_byte+0x54/0x70 [ 32.222494] kmem_cache_destroy+0x34/0x218 [ 32.222779] kmem_cache_double_destroy+0x174/0x300 [ 32.222907] kunit_try_run_case+0x170/0x3f0 [ 32.223020] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.223145] kthread+0x328/0x630 [ 32.223699] ret_from_fork+0x10/0x20 [ 32.224039] [ 32.224108] Allocated by task 226: [ 32.224322] kasan_save_stack+0x3c/0x68 [ 32.224474] kasan_save_track+0x20/0x40 [ 32.224929] kasan_save_alloc_info+0x40/0x58 [ 32.225116] __kasan_slab_alloc+0xa8/0xb0 [ 32.225329] kmem_cache_alloc_noprof+0x10c/0x398 [ 32.225474] __kmem_cache_create_args+0x178/0x280 [ 32.225578] kmem_cache_double_destroy+0xc0/0x300 [ 32.226027] kunit_try_run_case+0x170/0x3f0 [ 32.226239] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.226413] kthread+0x328/0x630 [ 32.226561] ret_from_fork+0x10/0x20 [ 32.226768] [ 32.226821] Freed by task 226: [ 32.226900] kasan_save_stack+0x3c/0x68 [ 32.227016] kasan_save_track+0x20/0x40 [ 32.227112] kasan_save_free_info+0x4c/0x78 [ 32.227214] __kasan_slab_free+0x6c/0x98 [ 32.227311] kmem_cache_free+0x260/0x468 [ 32.227754] slab_kmem_cache_release+0x38/0x50 [ 32.227992] kmem_cache_release+0x1c/0x30 [ 32.228567] kobject_put+0x17c/0x420 [ 32.228810] sysfs_slab_release+0x1c/0x30 [ 32.229013] kmem_cache_destroy+0x118/0x218 [ 32.229254] kmem_cache_double_destroy+0x128/0x300 [ 32.229357] kunit_try_run_case+0x170/0x3f0 [ 32.229764] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.230059] kthread+0x328/0x630 [ 32.230151] ret_from_fork+0x10/0x20 [ 32.230243] [ 32.230303] The buggy address belongs to the object at fff00000c7751000 [ 32.230303] which belongs to the cache kmem_cache of size 208 [ 32.231048] The buggy address is located 0 bytes inside of [ 32.231048] freed 208-byte region [fff00000c7751000, fff00000c77510d0) [ 32.231610] [ 32.231859] The buggy address belongs to the physical page: [ 32.232170] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107751 [ 32.232654] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.233058] page_type: f5(slab) [ 32.233185] raw: 0bfffe0000000000 fff00000c0001000 dead000000000122 0000000000000000 [ 32.233692] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 32.234081] page dumped because: kasan: bad access detected [ 32.234170] [ 32.234213] Memory state around the buggy address: [ 32.234285] fff00000c7750f00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.234381] fff00000c7750f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.234477] >fff00000c7751000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.235034] ^ [ 32.235195] fff00000c7751080: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.235382] fff00000c7751100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.235567] ==================================================================
[ 28.041887] ================================================================== [ 28.042972] BUG: KASAN: slab-use-after-free in kmem_cache_double_destroy+0x1bf/0x380 [ 28.043643] Read of size 1 at addr ffff888101981c80 by task kunit_try_catch/244 [ 28.044035] [ 28.044276] CPU: 0 UID: 0 PID: 244 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT(voluntary) [ 28.044390] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.044420] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 28.044471] Call Trace: [ 28.044507] <TASK> [ 28.044549] dump_stack_lvl+0x73/0xb0 [ 28.044618] print_report+0xd1/0x650 [ 28.044663] ? __virt_addr_valid+0x1db/0x2d0 [ 28.044707] ? kmem_cache_double_destroy+0x1bf/0x380 [ 28.044749] ? kasan_complete_mode_report_info+0x64/0x200 [ 28.044800] ? kmem_cache_double_destroy+0x1bf/0x380 [ 28.044851] kasan_report+0x141/0x180 [ 28.044939] ? kmem_cache_double_destroy+0x1bf/0x380 [ 28.045009] ? kmem_cache_double_destroy+0x1bf/0x380 [ 28.045065] __kasan_check_byte+0x3d/0x50 [ 28.045117] kmem_cache_destroy+0x25/0x1d0 [ 28.045165] kmem_cache_double_destroy+0x1bf/0x380 [ 28.045214] ? __pfx_kmem_cache_double_destroy+0x10/0x10 [ 28.045261] ? finish_task_switch.isra.0+0x153/0x700 [ 28.045308] ? __switch_to+0x47/0xf50 [ 28.045362] ? __pfx_read_tsc+0x10/0x10 [ 28.045411] ? ktime_get_ts64+0x86/0x230 [ 28.045468] kunit_try_run_case+0x1a5/0x480 [ 28.045516] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.045561] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 28.045606] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 28.045654] ? __kthread_parkme+0x82/0x180 [ 28.045699] ? preempt_count_sub+0x50/0x80 [ 28.045750] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.045796] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.045841] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 28.045883] kthread+0x337/0x6f0 [ 28.045965] ? trace_preempt_on+0x20/0xc0 [ 28.046020] ? __pfx_kthread+0x10/0x10 [ 28.046069] ? _raw_spin_unlock_irq+0x47/0x80 [ 28.046127] ? calculate_sigpending+0x7b/0xa0 [ 28.046269] ? __pfx_kthread+0x10/0x10 [ 28.046298] ret_from_fork+0x116/0x1d0 [ 28.046328] ? __pfx_kthread+0x10/0x10 [ 28.046356] ret_from_fork_asm+0x1a/0x30 [ 28.046391] </TASK> [ 28.046405] [ 28.056505] Allocated by task 244: [ 28.056951] kasan_save_stack+0x45/0x70 [ 28.057381] kasan_save_track+0x18/0x40 [ 28.057743] kasan_save_alloc_info+0x3b/0x50 [ 28.058170] __kasan_slab_alloc+0x91/0xa0 [ 28.058509] kmem_cache_alloc_noprof+0x123/0x3f0 [ 28.058736] __kmem_cache_create_args+0x169/0x240 [ 28.058998] kmem_cache_double_destroy+0xd5/0x380 [ 28.059400] kunit_try_run_case+0x1a5/0x480 [ 28.059784] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.060299] kthread+0x337/0x6f0 [ 28.060548] ret_from_fork+0x116/0x1d0 [ 28.060775] ret_from_fork_asm+0x1a/0x30 [ 28.061018] [ 28.061188] Freed by task 244: [ 28.061477] kasan_save_stack+0x45/0x70 [ 28.061767] kasan_save_track+0x18/0x40 [ 28.062083] kasan_save_free_info+0x3f/0x60 [ 28.062363] __kasan_slab_free+0x56/0x70 [ 28.062643] kmem_cache_free+0x249/0x420 [ 28.062840] slab_kmem_cache_release+0x2e/0x40 [ 28.063219] kmem_cache_release+0x16/0x20 [ 28.063419] kobject_put+0x181/0x450 [ 28.063716] sysfs_slab_release+0x16/0x20 [ 28.064117] kmem_cache_destroy+0xf0/0x1d0 [ 28.064404] kmem_cache_double_destroy+0x14e/0x380 [ 28.064793] kunit_try_run_case+0x1a5/0x480 [ 28.065084] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.065541] kthread+0x337/0x6f0 [ 28.065747] ret_from_fork+0x116/0x1d0 [ 28.065998] ret_from_fork_asm+0x1a/0x30 [ 28.066352] [ 28.066532] The buggy address belongs to the object at ffff888101981c80 [ 28.066532] which belongs to the cache kmem_cache of size 208 [ 28.067277] The buggy address is located 0 bytes inside of [ 28.067277] freed 208-byte region [ffff888101981c80, ffff888101981d50) [ 28.067722] [ 28.067835] The buggy address belongs to the physical page: [ 28.068116] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101981 [ 28.068757] flags: 0x200000000000000(node=0|zone=2) [ 28.069230] page_type: f5(slab) [ 28.069540] raw: 0200000000000000 ffff888100041000 dead000000000122 0000000000000000 [ 28.072465] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 [ 28.073124] page dumped because: kasan: bad access detected [ 28.073589] [ 28.073763] Memory state around the buggy address: [ 28.074164] ffff888101981b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.074484] ffff888101981c00: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.075087] >ffff888101981c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.075423] ^ [ 28.075720] ffff888101981d00: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.076186] ffff888101981d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.076466] ==================================================================