Date
July 6, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.192088] ================================================================== [ 18.192149] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 18.192214] Write of size 33 at addr fff00000c641ee80 by task kunit_try_catch/186 [ 18.192771] [ 18.192909] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.192997] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.193024] Hardware name: linux,dummy-virt (DT) [ 18.193126] Call trace: [ 18.193152] show_stack+0x20/0x38 (C) [ 18.193314] dump_stack_lvl+0x8c/0xd0 [ 18.193403] print_report+0x118/0x608 [ 18.193455] kasan_report+0xdc/0x128 [ 18.193913] kasan_check_range+0x100/0x1a8 [ 18.194116] __asan_memset+0x34/0x78 [ 18.194160] kmalloc_uaf_memset+0x170/0x310 [ 18.194223] kunit_try_run_case+0x170/0x3f0 [ 18.194406] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.194845] kthread+0x328/0x630 [ 18.195025] ret_from_fork+0x10/0x20 [ 18.195295] [ 18.195319] Allocated by task 186: [ 18.195377] kasan_save_stack+0x3c/0x68 [ 18.195656] kasan_save_track+0x20/0x40 [ 18.195777] kasan_save_alloc_info+0x40/0x58 [ 18.196014] __kasan_kmalloc+0xd4/0xd8 [ 18.196226] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.196477] kmalloc_uaf_memset+0xb8/0x310 [ 18.196770] kunit_try_run_case+0x170/0x3f0 [ 18.197131] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.197418] kthread+0x328/0x630 [ 18.197637] ret_from_fork+0x10/0x20 [ 18.197983] [ 18.198017] Freed by task 186: [ 18.198058] kasan_save_stack+0x3c/0x68 [ 18.198107] kasan_save_track+0x20/0x40 [ 18.198144] kasan_save_free_info+0x4c/0x78 [ 18.198213] __kasan_slab_free+0x6c/0x98 [ 18.198258] kfree+0x214/0x3c8 [ 18.198290] kmalloc_uaf_memset+0x11c/0x310 [ 18.198621] kunit_try_run_case+0x170/0x3f0 [ 18.198683] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.198978] kthread+0x328/0x630 [ 18.199219] ret_from_fork+0x10/0x20 [ 18.199342] [ 18.199446] The buggy address belongs to the object at fff00000c641ee80 [ 18.199446] which belongs to the cache kmalloc-64 of size 64 [ 18.199606] The buggy address is located 0 bytes inside of [ 18.199606] freed 64-byte region [fff00000c641ee80, fff00000c641eec0) [ 18.199778] [ 18.199828] The buggy address belongs to the physical page: [ 18.199860] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10641e [ 18.200254] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.200417] page_type: f5(slab) [ 18.200460] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.200795] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.200854] page dumped because: kasan: bad access detected [ 18.201004] [ 18.201033] Memory state around the buggy address: [ 18.201068] fff00000c641ed80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.201275] fff00000c641ee00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.201515] >fff00000c641ee80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.201729] ^ [ 18.201828] fff00000c641ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.201960] fff00000c641ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.202218] ==================================================================
[ 11.853842] ================================================================== [ 11.854309] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.854621] Write of size 33 at addr ffff88810279c380 by task kunit_try_catch/203 [ 11.854925] [ 11.855343] CPU: 1 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.855396] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.855409] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.855432] Call Trace: [ 11.855446] <TASK> [ 11.855465] dump_stack_lvl+0x73/0xb0 [ 11.855498] print_report+0xd1/0x650 [ 11.855522] ? __virt_addr_valid+0x1db/0x2d0 [ 11.855545] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.855567] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.855588] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.855610] kasan_report+0x141/0x180 [ 11.855631] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.855656] kasan_check_range+0x10c/0x1c0 [ 11.855679] __asan_memset+0x27/0x50 [ 11.855698] kmalloc_uaf_memset+0x1a3/0x360 [ 11.855719] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.855741] ? __schedule+0x10cc/0x2b60 [ 11.855763] ? __pfx_read_tsc+0x10/0x10 [ 11.855784] ? ktime_get_ts64+0x86/0x230 [ 11.855810] kunit_try_run_case+0x1a5/0x480 [ 11.855835] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.855857] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.855880] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.855902] ? __kthread_parkme+0x82/0x180 [ 11.855924] ? preempt_count_sub+0x50/0x80 [ 11.855962] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.855985] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.856007] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.856029] kthread+0x337/0x6f0 [ 11.856049] ? trace_preempt_on+0x20/0xc0 [ 11.856129] ? __pfx_kthread+0x10/0x10 [ 11.856153] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.856173] ? calculate_sigpending+0x7b/0xa0 [ 11.856198] ? __pfx_kthread+0x10/0x10 [ 11.856219] ret_from_fork+0x116/0x1d0 [ 11.856238] ? __pfx_kthread+0x10/0x10 [ 11.856258] ret_from_fork_asm+0x1a/0x30 [ 11.856289] </TASK> [ 11.856302] [ 11.863920] Allocated by task 203: [ 11.864146] kasan_save_stack+0x45/0x70 [ 11.864347] kasan_save_track+0x18/0x40 [ 11.864552] kasan_save_alloc_info+0x3b/0x50 [ 11.864772] __kasan_kmalloc+0xb7/0xc0 [ 11.864952] __kmalloc_cache_noprof+0x189/0x420 [ 11.865111] kmalloc_uaf_memset+0xa9/0x360 [ 11.865254] kunit_try_run_case+0x1a5/0x480 [ 11.865482] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.865734] kthread+0x337/0x6f0 [ 11.865913] ret_from_fork+0x116/0x1d0 [ 11.866114] ret_from_fork_asm+0x1a/0x30 [ 11.866325] [ 11.866422] Freed by task 203: [ 11.866626] kasan_save_stack+0x45/0x70 [ 11.866793] kasan_save_track+0x18/0x40 [ 11.866942] kasan_save_free_info+0x3f/0x60 [ 11.867212] __kasan_slab_free+0x56/0x70 [ 11.867414] kfree+0x222/0x3f0 [ 11.867572] kmalloc_uaf_memset+0x12b/0x360 [ 11.867762] kunit_try_run_case+0x1a5/0x480 [ 11.867950] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.868202] kthread+0x337/0x6f0 [ 11.868329] ret_from_fork+0x116/0x1d0 [ 11.868520] ret_from_fork_asm+0x1a/0x30 [ 11.868720] [ 11.868818] The buggy address belongs to the object at ffff88810279c380 [ 11.868818] which belongs to the cache kmalloc-64 of size 64 [ 11.869193] The buggy address is located 0 bytes inside of [ 11.869193] freed 64-byte region [ffff88810279c380, ffff88810279c3c0) [ 11.869536] [ 11.869627] The buggy address belongs to the physical page: [ 11.869882] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10279c [ 11.870626] flags: 0x200000000000000(node=0|zone=2) [ 11.870874] page_type: f5(slab) [ 11.871062] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.871377] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.871729] page dumped because: kasan: bad access detected [ 11.871942] [ 11.872015] Memory state around the buggy address: [ 11.872354] ffff88810279c280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.872765] ffff88810279c300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.872996] >ffff88810279c380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.873441] ^ [ 11.873956] ffff88810279c400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.874519] ffff88810279c480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.874748] ==================================================================