Date
June 25, 2025, 8:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 26.855838] ================================================================== [ 26.855911] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 26.855982] Read of size 1 at addr fff00000c3f9db40 by task kunit_try_catch/204 [ 26.856609] [ 26.856735] CPU: 1 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT [ 26.856930] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.857183] Hardware name: linux,dummy-virt (DT) [ 26.857319] Call trace: [ 26.857735] show_stack+0x20/0x38 (C) [ 26.857877] dump_stack_lvl+0x8c/0xd0 [ 26.858082] print_report+0x118/0x608 [ 26.858523] kasan_report+0xdc/0x128 [ 26.858689] __kasan_check_byte+0x54/0x70 [ 26.859075] kfree_sensitive+0x30/0xb0 [ 26.859212] kmalloc_double_kzfree+0x168/0x308 [ 26.859611] kunit_try_run_case+0x170/0x3f0 [ 26.859737] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.859841] kthread+0x328/0x630 [ 26.859889] ret_from_fork+0x10/0x20 [ 26.860299] [ 26.860337] Allocated by task 204: [ 26.860540] kasan_save_stack+0x3c/0x68 [ 26.860639] kasan_save_track+0x20/0x40 [ 26.860768] kasan_save_alloc_info+0x40/0x58 [ 26.860810] __kasan_kmalloc+0xd4/0xd8 [ 26.860849] __kmalloc_cache_noprof+0x16c/0x3c0 [ 26.860888] kmalloc_double_kzfree+0xb8/0x308 [ 26.860926] kunit_try_run_case+0x170/0x3f0 [ 26.860993] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.861038] kthread+0x328/0x630 [ 26.861069] ret_from_fork+0x10/0x20 [ 26.861107] [ 26.861126] Freed by task 204: [ 26.861152] kasan_save_stack+0x3c/0x68 [ 26.861191] kasan_save_track+0x20/0x40 [ 26.861228] kasan_save_free_info+0x4c/0x78 [ 26.861272] __kasan_slab_free+0x6c/0x98 [ 26.861320] kfree+0x214/0x3c8 [ 26.861352] kfree_sensitive+0x80/0xb0 [ 26.861389] kmalloc_double_kzfree+0x11c/0x308 [ 26.861441] kunit_try_run_case+0x170/0x3f0 [ 26.861479] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.861526] kthread+0x328/0x630 [ 26.861558] ret_from_fork+0x10/0x20 [ 26.861594] [ 26.861614] The buggy address belongs to the object at fff00000c3f9db40 [ 26.861614] which belongs to the cache kmalloc-16 of size 16 [ 26.861685] The buggy address is located 0 bytes inside of [ 26.861685] freed 16-byte region [fff00000c3f9db40, fff00000c3f9db50) [ 26.861745] [ 26.861779] The buggy address belongs to the physical page: [ 26.861813] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f9d [ 26.861874] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 26.861934] page_type: f5(slab) [ 26.861975] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 26.862034] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 26.862082] page dumped because: kasan: bad access detected [ 26.862118] [ 26.862136] Memory state around the buggy address: [ 26.862178] fff00000c3f9da00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.862220] fff00000c3f9da80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.862271] >fff00000c3f9db00: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 26.862318] ^ [ 26.862379] fff00000c3f9db80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.863338] fff00000c3f9dc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.863442] ==================================================================
[ 22.216459] ================================================================== [ 22.218146] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 22.219342] Read of size 1 at addr ffff8881016c54a0 by task kunit_try_catch/221 [ 22.220389] [ 22.220491] CPU: 0 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT(voluntary) [ 22.220543] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.220556] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.220577] Call Trace: [ 22.220595] <TASK> [ 22.220616] dump_stack_lvl+0x73/0xb0 [ 22.220650] print_report+0xd1/0x650 [ 22.220675] ? __virt_addr_valid+0x1db/0x2d0 [ 22.220701] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.220725] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.220751] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.220775] kasan_report+0x141/0x180 [ 22.220797] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.221031] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.221059] __kasan_check_byte+0x3d/0x50 [ 22.221085] kfree_sensitive+0x22/0x90 [ 22.221114] kmalloc_double_kzfree+0x19c/0x350 [ 22.221180] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 22.221205] ? __schedule+0x10cc/0x2b60 [ 22.221234] ? __pfx_read_tsc+0x10/0x10 [ 22.221258] ? ktime_get_ts64+0x86/0x230 [ 22.221284] kunit_try_run_case+0x1a5/0x480 [ 22.221314] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.221339] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.221361] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.221386] ? __kthread_parkme+0x82/0x180 [ 22.221408] ? preempt_count_sub+0x50/0x80 [ 22.221432] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.221457] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.221480] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.221504] kthread+0x337/0x6f0 [ 22.221525] ? trace_preempt_on+0x20/0xc0 [ 22.221549] ? __pfx_kthread+0x10/0x10 [ 22.221570] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.221593] ? calculate_sigpending+0x7b/0xa0 [ 22.221618] ? __pfx_kthread+0x10/0x10 [ 22.221640] ret_from_fork+0x116/0x1d0 [ 22.221659] ? __pfx_kthread+0x10/0x10 [ 22.221680] ret_from_fork_asm+0x1a/0x30 [ 22.221712] </TASK> [ 22.221725] [ 22.236346] Allocated by task 221: [ 22.236483] kasan_save_stack+0x45/0x70 [ 22.236839] kasan_save_track+0x18/0x40 [ 22.237184] kasan_save_alloc_info+0x3b/0x50 [ 22.238631] __kasan_kmalloc+0xb7/0xc0 [ 22.238925] __kmalloc_cache_noprof+0x189/0x420 [ 22.239376] kmalloc_double_kzfree+0xa9/0x350 [ 22.239522] kunit_try_run_case+0x1a5/0x480 [ 22.239663] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.239826] kthread+0x337/0x6f0 [ 22.239935] ret_from_fork+0x116/0x1d0 [ 22.240066] ret_from_fork_asm+0x1a/0x30 [ 22.240301] [ 22.240388] Freed by task 221: [ 22.240494] kasan_save_stack+0x45/0x70 [ 22.240623] kasan_save_track+0x18/0x40 [ 22.240747] kasan_save_free_info+0x3f/0x60 [ 22.240883] __kasan_slab_free+0x56/0x70 [ 22.241023] kfree+0x222/0x3f0 [ 22.241131] kfree_sensitive+0x67/0x90 [ 22.241258] kmalloc_double_kzfree+0x12b/0x350 [ 22.241400] kunit_try_run_case+0x1a5/0x480 [ 22.241537] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.241701] kthread+0x337/0x6f0 [ 22.241812] ret_from_fork+0x116/0x1d0 [ 22.242291] ret_from_fork_asm+0x1a/0x30 [ 22.242688] [ 22.242841] The buggy address belongs to the object at ffff8881016c54a0 [ 22.242841] which belongs to the cache kmalloc-16 of size 16 [ 22.244157] The buggy address is located 0 bytes inside of [ 22.244157] freed 16-byte region [ffff8881016c54a0, ffff8881016c54b0) [ 22.245391] [ 22.245571] The buggy address belongs to the physical page: [ 22.246070] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1016c5 [ 22.246994] flags: 0x200000000000000(node=0|zone=2) [ 22.247567] page_type: f5(slab) [ 22.248116] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 22.248822] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 22.249571] page dumped because: kasan: bad access detected [ 22.250126] [ 22.250316] Memory state around the buggy address: [ 22.250807] ffff8881016c5380: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 22.251476] ffff8881016c5400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.252081] >ffff8881016c5480: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 22.252715] ^ [ 22.253001] ffff8881016c5500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.253748] ffff8881016c5580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.254210] ==================================================================