Date
July 17, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.805818] ================================================================== [ 16.805918] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 16.805989] Read of size 1 at addr fff00000c3e55180 by task kunit_try_catch/192 [ 16.806068] [ 16.806127] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.806356] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.806528] Hardware name: linux,dummy-virt (DT) [ 16.806571] Call trace: [ 16.806600] show_stack+0x20/0x38 (C) [ 16.806653] dump_stack_lvl+0x8c/0xd0 [ 16.806728] print_report+0x118/0x5d0 [ 16.806793] kasan_report+0xdc/0x128 [ 16.806853] __kasan_check_byte+0x54/0x70 [ 16.806914] kfree_sensitive+0x30/0xb0 [ 16.806959] kmalloc_double_kzfree+0x168/0x308 [ 16.807045] kunit_try_run_case+0x170/0x3f0 [ 16.807092] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.807149] kthread+0x328/0x630 [ 16.807191] ret_from_fork+0x10/0x20 [ 16.807247] [ 16.807265] Allocated by task 192: [ 16.807334] kasan_save_stack+0x3c/0x68 [ 16.807380] kasan_save_track+0x20/0x40 [ 16.807416] kasan_save_alloc_info+0x40/0x58 [ 16.807595] __kasan_kmalloc+0xd4/0xd8 [ 16.807665] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.807707] kmalloc_double_kzfree+0xb8/0x308 [ 16.807816] kunit_try_run_case+0x170/0x3f0 [ 16.807855] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.807909] kthread+0x328/0x630 [ 16.808135] ret_from_fork+0x10/0x20 [ 16.808273] [ 16.808331] Freed by task 192: [ 16.808358] kasan_save_stack+0x3c/0x68 [ 16.808395] kasan_save_track+0x20/0x40 [ 16.808456] kasan_save_free_info+0x4c/0x78 [ 16.808499] __kasan_slab_free+0x6c/0x98 [ 16.808680] kfree+0x214/0x3c8 [ 16.808833] kfree_sensitive+0x80/0xb0 [ 16.808886] kmalloc_double_kzfree+0x11c/0x308 [ 16.808963] kunit_try_run_case+0x170/0x3f0 [ 16.809214] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.809333] kthread+0x328/0x630 [ 16.809463] ret_from_fork+0x10/0x20 [ 16.809599] [ 16.809736] The buggy address belongs to the object at fff00000c3e55180 [ 16.809736] which belongs to the cache kmalloc-16 of size 16 [ 16.809824] The buggy address is located 0 bytes inside of [ 16.809824] freed 16-byte region [fff00000c3e55180, fff00000c3e55190) [ 16.809957] [ 16.810023] The buggy address belongs to the physical page: [ 16.810361] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103e55 [ 16.810560] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.810704] page_type: f5(slab) [ 16.810777] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.810826] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.811174] page dumped because: kasan: bad access detected [ 16.811297] [ 16.811365] Memory state around the buggy address: [ 16.811428] fff00000c3e55080: 00 05 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.811508] fff00000c3e55100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.811582] >fff00000c3e55180: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.811648] ^ [ 16.811736] fff00000c3e55200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.811815] fff00000c3e55280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.812039] ==================================================================
[ 12.614179] ================================================================== [ 12.615162] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 12.615695] Read of size 1 at addr ffff8881025ee340 by task kunit_try_catch/209 [ 12.616180] [ 12.616299] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.616347] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.616358] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.616379] Call Trace: [ 12.616391] <TASK> [ 12.616407] dump_stack_lvl+0x73/0xb0 [ 12.616436] print_report+0xd1/0x610 [ 12.616457] ? __virt_addr_valid+0x1db/0x2d0 [ 12.616480] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.616502] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.616524] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.616547] kasan_report+0x141/0x180 [ 12.616568] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.616742] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.616769] __kasan_check_byte+0x3d/0x50 [ 12.616791] kfree_sensitive+0x22/0x90 [ 12.616837] kmalloc_double_kzfree+0x19c/0x350 [ 12.616859] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.616920] ? __schedule+0x10cc/0x2b60 [ 12.616944] ? __pfx_read_tsc+0x10/0x10 [ 12.616964] ? ktime_get_ts64+0x86/0x230 [ 12.616988] kunit_try_run_case+0x1a5/0x480 [ 12.617012] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.617034] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.617067] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.617090] ? __kthread_parkme+0x82/0x180 [ 12.617109] ? preempt_count_sub+0x50/0x80 [ 12.617133] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.617155] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.617178] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.617201] kthread+0x337/0x6f0 [ 12.617219] ? trace_preempt_on+0x20/0xc0 [ 12.617241] ? __pfx_kthread+0x10/0x10 [ 12.617261] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.617282] ? calculate_sigpending+0x7b/0xa0 [ 12.617305] ? __pfx_kthread+0x10/0x10 [ 12.617325] ret_from_fork+0x116/0x1d0 [ 12.617343] ? __pfx_kthread+0x10/0x10 [ 12.617362] ret_from_fork_asm+0x1a/0x30 [ 12.617394] </TASK> [ 12.617404] [ 12.627454] Allocated by task 209: [ 12.627918] kasan_save_stack+0x45/0x70 [ 12.628387] kasan_save_track+0x18/0x40 [ 12.628671] kasan_save_alloc_info+0x3b/0x50 [ 12.628953] __kasan_kmalloc+0xb7/0xc0 [ 12.629160] __kmalloc_cache_noprof+0x189/0x420 [ 12.629321] kmalloc_double_kzfree+0xa9/0x350 [ 12.629472] kunit_try_run_case+0x1a5/0x480 [ 12.630737] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.631298] kthread+0x337/0x6f0 [ 12.632223] ret_from_fork+0x116/0x1d0 [ 12.632427] ret_from_fork_asm+0x1a/0x30 [ 12.632634] [ 12.632732] Freed by task 209: [ 12.632892] kasan_save_stack+0x45/0x70 [ 12.633030] kasan_save_track+0x18/0x40 [ 12.633207] kasan_save_free_info+0x3f/0x60 [ 12.633599] __kasan_slab_free+0x56/0x70 [ 12.633750] kfree+0x222/0x3f0 [ 12.633936] kfree_sensitive+0x67/0x90 [ 12.634094] kmalloc_double_kzfree+0x12b/0x350 [ 12.634308] kunit_try_run_case+0x1a5/0x480 [ 12.634523] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.634884] kthread+0x337/0x6f0 [ 12.635042] ret_from_fork+0x116/0x1d0 [ 12.635222] ret_from_fork_asm+0x1a/0x30 [ 12.635373] [ 12.635471] The buggy address belongs to the object at ffff8881025ee340 [ 12.635471] which belongs to the cache kmalloc-16 of size 16 [ 12.636171] The buggy address is located 0 bytes inside of [ 12.636171] freed 16-byte region [ffff8881025ee340, ffff8881025ee350) [ 12.636733] [ 12.636881] The buggy address belongs to the physical page: [ 12.637129] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025ee [ 12.637424] flags: 0x200000000000000(node=0|zone=2) [ 12.637711] page_type: f5(slab) [ 12.638141] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.638493] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.638926] page dumped because: kasan: bad access detected [ 12.639205] [ 12.639281] Memory state around the buggy address: [ 12.639516] ffff8881025ee200: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 12.639887] ffff8881025ee280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.640199] >ffff8881025ee300: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 12.640516] ^ [ 12.640702] ffff8881025ee380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.640909] ffff8881025ee400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.641289] ==================================================================