Date
July 9, 2025, 1:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.477967] ================================================================== [ 29.478044] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 29.478115] Read of size 1 at addr fff00000c592c920 by task kunit_try_catch/224 [ 29.478166] [ 29.478195] CPU: 0 UID: 0 PID: 224 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250709 #1 PREEMPT [ 29.478295] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.478322] Hardware name: linux,dummy-virt (DT) [ 29.478579] Call trace: [ 29.478612] show_stack+0x20/0x38 (C) [ 29.478666] dump_stack_lvl+0x8c/0xd0 [ 29.478713] print_report+0x118/0x5d0 [ 29.478867] kasan_report+0xdc/0x128 [ 29.478937] __kasan_check_byte+0x54/0x70 [ 29.479037] kfree_sensitive+0x30/0xb0 [ 29.479110] kmalloc_double_kzfree+0x168/0x308 [ 29.479165] kunit_try_run_case+0x170/0x3f0 [ 29.479251] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.479306] kthread+0x328/0x630 [ 29.479373] ret_from_fork+0x10/0x20 [ 29.479448] [ 29.479468] Allocated by task 224: [ 29.479513] kasan_save_stack+0x3c/0x68 [ 29.479555] kasan_save_track+0x20/0x40 [ 29.479613] kasan_save_alloc_info+0x40/0x58 [ 29.479657] __kasan_kmalloc+0xd4/0xd8 [ 29.479729] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.479818] kmalloc_double_kzfree+0xb8/0x308 [ 29.479950] kunit_try_run_case+0x170/0x3f0 [ 29.479991] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.480208] kthread+0x328/0x630 [ 29.480243] ret_from_fork+0x10/0x20 [ 29.480485] [ 29.480605] Freed by task 224: [ 29.480695] kasan_save_stack+0x3c/0x68 [ 29.480830] kasan_save_track+0x20/0x40 [ 29.481005] kasan_save_free_info+0x4c/0x78 [ 29.481072] __kasan_slab_free+0x6c/0x98 [ 29.481138] kfree+0x214/0x3c8 [ 29.481220] kfree_sensitive+0x80/0xb0 [ 29.481257] kmalloc_double_kzfree+0x11c/0x308 [ 29.481296] kunit_try_run_case+0x170/0x3f0 [ 29.481336] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.481382] kthread+0x328/0x630 [ 29.481621] ret_from_fork+0x10/0x20 [ 29.481666] [ 29.481688] The buggy address belongs to the object at fff00000c592c920 [ 29.481688] which belongs to the cache kmalloc-16 of size 16 [ 29.481958] The buggy address is located 0 bytes inside of [ 29.481958] freed 16-byte region [fff00000c592c920, fff00000c592c930) [ 29.482088] [ 29.482238] The buggy address belongs to the physical page: [ 29.482321] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10592c [ 29.482480] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.482555] page_type: f5(slab) [ 29.482593] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 29.482644] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 29.482906] page dumped because: kasan: bad access detected [ 29.482993] [ 29.483152] Memory state around the buggy address: [ 29.483298] fff00000c592c800: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 29.483413] fff00000c592c880: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 29.483457] >fff00000c592c900: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 29.483638] ^ [ 29.483800] fff00000c592c980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.483881] fff00000c592ca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.483919] ==================================================================
[ 24.436573] ================================================================== [ 24.437276] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 24.437519] Read of size 1 at addr ffff8881058a8220 by task kunit_try_catch/242 [ 24.439016] [ 24.439133] CPU: 0 UID: 0 PID: 242 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc5-next-20250709 #1 PREEMPT(voluntary) [ 24.439191] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 24.439205] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.439228] Call Trace: [ 24.439244] <TASK> [ 24.439266] dump_stack_lvl+0x73/0xb0 [ 24.439300] print_report+0xd1/0x610 [ 24.439322] ? __virt_addr_valid+0x1db/0x2d0 [ 24.439347] ? kmalloc_double_kzfree+0x19c/0x350 [ 24.439369] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.439395] ? kmalloc_double_kzfree+0x19c/0x350 [ 24.439417] kasan_report+0x141/0x180 [ 24.439438] ? kmalloc_double_kzfree+0x19c/0x350 [ 24.439463] ? kmalloc_double_kzfree+0x19c/0x350 [ 24.440114] __kasan_check_byte+0x3d/0x50 [ 24.440143] kfree_sensitive+0x22/0x90 [ 24.440173] kmalloc_double_kzfree+0x19c/0x350 [ 24.440196] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 24.440220] ? __schedule+0x10cc/0x2b60 [ 24.440244] ? __pfx_read_tsc+0x10/0x10 [ 24.440266] ? ktime_get_ts64+0x86/0x230 [ 24.440291] kunit_try_run_case+0x1a5/0x480 [ 24.440314] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.440334] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 24.440359] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.440382] ? __kthread_parkme+0x82/0x180 [ 24.440404] ? preempt_count_sub+0x50/0x80 [ 24.440428] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.440449] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.440473] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.440497] kthread+0x337/0x6f0 [ 24.440517] ? trace_preempt_on+0x20/0xc0 [ 24.440540] ? __pfx_kthread+0x10/0x10 [ 24.440560] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.440581] ? calculate_sigpending+0x7b/0xa0 [ 24.440605] ? __pfx_kthread+0x10/0x10 [ 24.440626] ret_from_fork+0x116/0x1d0 [ 24.440644] ? __pfx_kthread+0x10/0x10 [ 24.440664] ret_from_fork_asm+0x1a/0x30 [ 24.440711] </TASK> [ 24.440724] [ 24.455057] Allocated by task 242: [ 24.455292] kasan_save_stack+0x45/0x70 [ 24.455484] kasan_save_track+0x18/0x40 [ 24.455656] kasan_save_alloc_info+0x3b/0x50 [ 24.456172] __kasan_kmalloc+0xb7/0xc0 [ 24.456555] __kmalloc_cache_noprof+0x189/0x420 [ 24.456923] kmalloc_double_kzfree+0xa9/0x350 [ 24.457305] kunit_try_run_case+0x1a5/0x480 [ 24.457505] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.457746] kthread+0x337/0x6f0 [ 24.458187] ret_from_fork+0x116/0x1d0 [ 24.458494] ret_from_fork_asm+0x1a/0x30 [ 24.458705] [ 24.459172] Freed by task 242: [ 24.459334] kasan_save_stack+0x45/0x70 [ 24.459514] kasan_save_track+0x18/0x40 [ 24.459682] kasan_save_free_info+0x3f/0x60 [ 24.460325] __kasan_slab_free+0x56/0x70 [ 24.460581] kfree+0x222/0x3f0 [ 24.460932] kfree_sensitive+0x67/0x90 [ 24.461263] kmalloc_double_kzfree+0x12b/0x350 [ 24.461460] kunit_try_run_case+0x1a5/0x480 [ 24.461647] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.462180] kthread+0x337/0x6f0 [ 24.462506] ret_from_fork+0x116/0x1d0 [ 24.462679] ret_from_fork_asm+0x1a/0x30 [ 24.463223] [ 24.463325] The buggy address belongs to the object at ffff8881058a8220 [ 24.463325] which belongs to the cache kmalloc-16 of size 16 [ 24.464001] The buggy address is located 0 bytes inside of [ 24.464001] freed 16-byte region [ffff8881058a8220, ffff8881058a8230) [ 24.464663] [ 24.464774] The buggy address belongs to the physical page: [ 24.465160] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058a8 [ 24.465751] flags: 0x200000000000000(node=0|zone=2) [ 24.466104] page_type: f5(slab) [ 24.466269] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 24.466570] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 24.467268] page dumped because: kasan: bad access detected [ 24.467577] [ 24.467668] Memory state around the buggy address: [ 24.468134] ffff8881058a8100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.468604] ffff8881058a8180: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 24.469087] >ffff8881058a8200: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 24.469309] ^ [ 24.469453] ffff8881058a8280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.469772] ffff8881058a8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.470029] ==================================================================