Date
June 24, 2025, 12:47 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.188064] ================================================================== [ 24.188264] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 24.188440] Read of size 1 at addr fff00000c3fab740 by task kunit_try_catch/194 [ 24.188797] [ 24.188953] CPU: 0 UID: 0 PID: 194 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc2 #1 PREEMPT [ 24.189155] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.189222] Hardware name: linux,dummy-virt (DT) [ 24.189297] Call trace: [ 24.189364] show_stack+0x20/0x38 (C) [ 24.189602] dump_stack_lvl+0x8c/0xd0 [ 24.189854] print_report+0x118/0x608 [ 24.190103] kasan_report+0xdc/0x128 [ 24.190651] __kasan_check_byte+0x54/0x70 [ 24.190797] kfree_sensitive+0x30/0xb0 [ 24.190930] kmalloc_double_kzfree+0x168/0x308 [ 24.191072] kunit_try_run_case+0x170/0x3f0 [ 24.191322] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.191492] kthread+0x328/0x630 [ 24.191622] ret_from_fork+0x10/0x20 [ 24.191788] [ 24.191873] Allocated by task 194: [ 24.191983] kasan_save_stack+0x3c/0x68 [ 24.192193] kasan_save_track+0x20/0x40 [ 24.192290] kasan_save_alloc_info+0x40/0x58 [ 24.192524] __kasan_kmalloc+0xd4/0xd8 [ 24.192625] __kmalloc_cache_noprof+0x16c/0x3c0 [ 24.192785] kmalloc_double_kzfree+0xb8/0x308 [ 24.192910] kunit_try_run_case+0x170/0x3f0 [ 24.193792] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.193913] kthread+0x328/0x630 [ 24.194006] ret_from_fork+0x10/0x20 [ 24.195771] [ 24.196035] Freed by task 194: [ 24.196485] kasan_save_stack+0x3c/0x68 [ 24.196597] kasan_save_track+0x20/0x40 [ 24.196697] kasan_save_free_info+0x4c/0x78 [ 24.197814] __kasan_slab_free+0x6c/0x98 [ 24.198353] kfree+0x214/0x3c8 [ 24.198638] kfree_sensitive+0x80/0xb0 [ 24.198761] kmalloc_double_kzfree+0x11c/0x308 [ 24.198876] kunit_try_run_case+0x170/0x3f0 [ 24.199158] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.199305] kthread+0x328/0x630 [ 24.199781] ret_from_fork+0x10/0x20 [ 24.200123] [ 24.200180] The buggy address belongs to the object at fff00000c3fab740 [ 24.200180] which belongs to the cache kmalloc-16 of size 16 [ 24.200662] The buggy address is located 0 bytes inside of [ 24.200662] freed 16-byte region [fff00000c3fab740, fff00000c3fab750) [ 24.200953] [ 24.201013] The buggy address belongs to the physical page: [ 24.201653] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103fab [ 24.202434] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.202801] page_type: f5(slab) [ 24.203002] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 24.203139] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 24.203607] page dumped because: kasan: bad access detected [ 24.203732] [ 24.203852] Memory state around the buggy address: [ 24.203936] fff00000c3fab600: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 24.204052] fff00000c3fab680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.204161] >fff00000c3fab700: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 24.204262] ^ [ 24.204352] fff00000c3fab780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.204493] fff00000c3fab800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.204612] ==================================================================
[ 12.120779] ================================================================== [ 12.121282] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 12.121865] Read of size 1 at addr ffff888102662fa0 by task kunit_try_catch/212 [ 12.122215] [ 12.122345] CPU: 1 UID: 0 PID: 212 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc2 #1 PREEMPT(voluntary) [ 12.122415] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.122430] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.122457] Call Trace: [ 12.122476] <TASK> [ 12.122505] dump_stack_lvl+0x73/0xb0 [ 12.122543] print_report+0xd1/0x650 [ 12.122572] ? __virt_addr_valid+0x1db/0x2d0 [ 12.122599] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.122634] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.122670] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.122699] kasan_report+0x141/0x180 [ 12.122734] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.122772] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.122805] __kasan_check_byte+0x3d/0x50 [ 12.122841] kfree_sensitive+0x22/0x90 [ 12.122885] kmalloc_double_kzfree+0x19c/0x350 [ 12.122923] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.122965] ? __schedule+0x10cc/0x2b60 [ 12.123009] ? __pfx_read_tsc+0x10/0x10 [ 12.123044] ? ktime_get_ts64+0x86/0x230 [ 12.123069] kunit_try_run_case+0x1a5/0x480 [ 12.123093] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.123113] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.123136] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.123157] ? __kthread_parkme+0x82/0x180 [ 12.123177] ? preempt_count_sub+0x50/0x80 [ 12.123213] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.123251] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.123293] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.123333] kthread+0x337/0x6f0 [ 12.123367] ? trace_preempt_on+0x20/0xc0 [ 12.123407] ? __pfx_kthread+0x10/0x10 [ 12.123473] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.123507] ? calculate_sigpending+0x7b/0xa0 [ 12.123538] ? __pfx_kthread+0x10/0x10 [ 12.123566] ret_from_fork+0x41/0x80 [ 12.123599] ? __pfx_kthread+0x10/0x10 [ 12.123644] ret_from_fork_asm+0x1a/0x30 [ 12.123702] </TASK> [ 12.123725] [ 12.134914] Allocated by task 212: [ 12.135393] kasan_save_stack+0x45/0x70 [ 12.136030] kasan_save_track+0x18/0x40 [ 12.136175] kasan_save_alloc_info+0x3b/0x50 [ 12.136607] __kasan_kmalloc+0xb7/0xc0 [ 12.136834] __kmalloc_cache_noprof+0x189/0x420 [ 12.137034] kmalloc_double_kzfree+0xa9/0x350 [ 12.137222] kunit_try_run_case+0x1a5/0x480 [ 12.137477] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.138146] kthread+0x337/0x6f0 [ 12.138350] ret_from_fork+0x41/0x80 [ 12.138523] ret_from_fork_asm+0x1a/0x30 [ 12.138991] [ 12.139155] Freed by task 212: [ 12.139436] kasan_save_stack+0x45/0x70 [ 12.139876] kasan_save_track+0x18/0x40 [ 12.140269] kasan_save_free_info+0x3f/0x60 [ 12.140410] __kasan_slab_free+0x56/0x70 [ 12.140524] kfree+0x222/0x3f0 [ 12.140789] kfree_sensitive+0x67/0x90 [ 12.141074] kmalloc_double_kzfree+0x12b/0x350 [ 12.141462] kunit_try_run_case+0x1a5/0x480 [ 12.141814] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.142244] kthread+0x337/0x6f0 [ 12.142474] ret_from_fork+0x41/0x80 [ 12.142967] ret_from_fork_asm+0x1a/0x30 [ 12.143364] [ 12.143593] The buggy address belongs to the object at ffff888102662fa0 [ 12.143593] which belongs to the cache kmalloc-16 of size 16 [ 12.144151] The buggy address is located 0 bytes inside of [ 12.144151] freed 16-byte region [ffff888102662fa0, ffff888102662fb0) [ 12.144725] [ 12.144870] The buggy address belongs to the physical page: [ 12.145243] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102662 [ 12.145528] flags: 0x200000000000000(node=0|zone=2) [ 12.146039] page_type: f5(slab) [ 12.146228] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.146459] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.147220] page dumped because: kasan: bad access detected [ 12.147768] [ 12.147954] Memory state around the buggy address: [ 12.148353] ffff888102662e80: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 12.148568] ffff888102662f00: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 12.149093] >ffff888102662f80: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.149364] ^ [ 12.149859] ffff888102663000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.150361] ffff888102663080: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 12.151080] ==================================================================