Date
July 5, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.142294] ================================================================== [ 18.142447] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 18.142549] Read of size 1 at addr fff00000c59fcc08 by task kunit_try_catch/184 [ 18.142599] [ 18.142631] CPU: 0 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.142856] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.142987] Hardware name: linux,dummy-virt (DT) [ 18.143050] Call trace: [ 18.143083] show_stack+0x20/0x38 (C) [ 18.143134] dump_stack_lvl+0x8c/0xd0 [ 18.143446] print_report+0x118/0x608 [ 18.143520] kasan_report+0xdc/0x128 [ 18.143565] __asan_report_load1_noabort+0x20/0x30 [ 18.143812] kmalloc_uaf+0x300/0x338 [ 18.144039] kunit_try_run_case+0x170/0x3f0 [ 18.144104] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.144171] kthread+0x328/0x630 [ 18.144212] ret_from_fork+0x10/0x20 [ 18.144569] [ 18.144680] Allocated by task 184: [ 18.144751] kasan_save_stack+0x3c/0x68 [ 18.145233] kasan_save_track+0x20/0x40 [ 18.145293] kasan_save_alloc_info+0x40/0x58 [ 18.145696] __kasan_kmalloc+0xd4/0xd8 [ 18.145841] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.146047] kmalloc_uaf+0xb8/0x338 [ 18.146231] kunit_try_run_case+0x170/0x3f0 [ 18.146314] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.146792] kthread+0x328/0x630 [ 18.146880] ret_from_fork+0x10/0x20 [ 18.146941] [ 18.147106] Freed by task 184: [ 18.147210] kasan_save_stack+0x3c/0x68 [ 18.147471] kasan_save_track+0x20/0x40 [ 18.147560] kasan_save_free_info+0x4c/0x78 [ 18.147739] __kasan_slab_free+0x6c/0x98 [ 18.147866] kfree+0x214/0x3c8 [ 18.147949] kmalloc_uaf+0x11c/0x338 [ 18.148008] kunit_try_run_case+0x170/0x3f0 [ 18.148230] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.148461] kthread+0x328/0x630 [ 18.148554] ret_from_fork+0x10/0x20 [ 18.148592] [ 18.148812] The buggy address belongs to the object at fff00000c59fcc00 [ 18.148812] which belongs to the cache kmalloc-16 of size 16 [ 18.148972] The buggy address is located 8 bytes inside of [ 18.148972] freed 16-byte region [fff00000c59fcc00, fff00000c59fcc10) [ 18.149036] [ 18.149271] The buggy address belongs to the physical page: [ 18.149432] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059fc [ 18.149498] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.149547] page_type: f5(slab) [ 18.149593] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.149642] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.149683] page dumped because: kasan: bad access detected [ 18.149714] [ 18.149732] Memory state around the buggy address: [ 18.150171] fff00000c59fcb00: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 18.150263] fff00000c59fcb80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.150455] >fff00000c59fcc00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.150518] ^ [ 18.150623] fff00000c59fcc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.150725] fff00000c59fcd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.151011] ==================================================================
[ 13.841027] ================================================================== [ 13.841810] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 13.842172] Read of size 1 at addr ffff88810216f108 by task kunit_try_catch/202 [ 13.842608] [ 13.842765] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.842839] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.842854] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.842878] Call Trace: [ 13.842893] <TASK> [ 13.842915] dump_stack_lvl+0x73/0xb0 [ 13.842954] print_report+0xd1/0x650 [ 13.842991] ? __virt_addr_valid+0x1db/0x2d0 [ 13.843020] ? kmalloc_uaf+0x320/0x380 [ 13.843054] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.843079] ? kmalloc_uaf+0x320/0x380 [ 13.843101] kasan_report+0x141/0x180 [ 13.843135] ? kmalloc_uaf+0x320/0x380 [ 13.843163] __asan_report_load1_noabort+0x18/0x20 [ 13.843190] kmalloc_uaf+0x320/0x380 [ 13.843378] ? __pfx_kmalloc_uaf+0x10/0x10 [ 13.843418] ? __schedule+0x10cc/0x2b60 [ 13.843445] ? __pfx_read_tsc+0x10/0x10 [ 13.843483] ? ktime_get_ts64+0x86/0x230 [ 13.843513] kunit_try_run_case+0x1a5/0x480 [ 13.843553] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.843577] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.843604] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.843641] ? __kthread_parkme+0x82/0x180 [ 13.843665] ? preempt_count_sub+0x50/0x80 [ 13.843693] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.843719] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.843743] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.843768] kthread+0x337/0x6f0 [ 13.843799] ? trace_preempt_on+0x20/0xc0 [ 13.843826] ? __pfx_kthread+0x10/0x10 [ 13.843848] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.843871] ? calculate_sigpending+0x7b/0xa0 [ 13.843899] ? __pfx_kthread+0x10/0x10 [ 13.843922] ret_from_fork+0x116/0x1d0 [ 13.843943] ? __pfx_kthread+0x10/0x10 [ 13.843965] ret_from_fork_asm+0x1a/0x30 [ 13.844001] </TASK> [ 13.844015] [ 13.854417] Allocated by task 202: [ 13.854632] kasan_save_stack+0x45/0x70 [ 13.854860] kasan_save_track+0x18/0x40 [ 13.855061] kasan_save_alloc_info+0x3b/0x50 [ 13.856155] __kasan_kmalloc+0xb7/0xc0 [ 13.856409] __kmalloc_cache_noprof+0x189/0x420 [ 13.856741] kmalloc_uaf+0xaa/0x380 [ 13.856933] kunit_try_run_case+0x1a5/0x480 [ 13.857448] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.857866] kthread+0x337/0x6f0 [ 13.858281] ret_from_fork+0x116/0x1d0 [ 13.858650] ret_from_fork_asm+0x1a/0x30 [ 13.858979] [ 13.859378] Freed by task 202: [ 13.859578] kasan_save_stack+0x45/0x70 [ 13.859976] kasan_save_track+0x18/0x40 [ 13.860447] kasan_save_free_info+0x3f/0x60 [ 13.860826] __kasan_slab_free+0x56/0x70 [ 13.861367] kfree+0x222/0x3f0 [ 13.861652] kmalloc_uaf+0x12c/0x380 [ 13.861866] kunit_try_run_case+0x1a5/0x480 [ 13.862317] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.862697] kthread+0x337/0x6f0 [ 13.862920] ret_from_fork+0x116/0x1d0 [ 13.863368] ret_from_fork_asm+0x1a/0x30 [ 13.863594] [ 13.863852] The buggy address belongs to the object at ffff88810216f100 [ 13.863852] which belongs to the cache kmalloc-16 of size 16 [ 13.864613] The buggy address is located 8 bytes inside of [ 13.864613] freed 16-byte region [ffff88810216f100, ffff88810216f110) [ 13.865641] [ 13.865769] The buggy address belongs to the physical page: [ 13.866114] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10216f [ 13.866633] flags: 0x200000000000000(node=0|zone=2) [ 13.867078] page_type: f5(slab) [ 13.867735] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.868117] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.868989] page dumped because: kasan: bad access detected [ 13.869406] [ 13.869525] Memory state around the buggy address: [ 13.869863] ffff88810216f000: fa fb fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc [ 13.870609] ffff88810216f080: 00 05 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 13.871050] >ffff88810216f100: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.871631] ^ [ 13.872070] ffff88810216f180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.872463] ffff88810216f200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.872905] ==================================================================