Date
July 20, 2025, 11:12 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.432875] ================================================================== [ 15.432934] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 15.432985] Write of size 33 at addr fff00000c7010800 by task kunit_try_catch/186 [ 15.433064] [ 15.433097] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.433177] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.433205] Hardware name: linux,dummy-virt (DT) [ 15.433236] Call trace: [ 15.433257] show_stack+0x20/0x38 (C) [ 15.433305] dump_stack_lvl+0x8c/0xd0 [ 15.433351] print_report+0x118/0x5d0 [ 15.433398] kasan_report+0xdc/0x128 [ 15.433454] kasan_check_range+0x100/0x1a8 [ 15.433502] __asan_memset+0x34/0x78 [ 15.433552] kmalloc_uaf_memset+0x170/0x310 [ 15.433597] kunit_try_run_case+0x170/0x3f0 [ 15.433645] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.433709] kthread+0x328/0x630 [ 15.433750] ret_from_fork+0x10/0x20 [ 15.433798] [ 15.433816] Allocated by task 186: [ 15.433844] kasan_save_stack+0x3c/0x68 [ 15.433920] kasan_save_track+0x20/0x40 [ 15.433959] kasan_save_alloc_info+0x40/0x58 [ 15.434096] __kasan_kmalloc+0xd4/0xd8 [ 15.434264] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.434476] kmalloc_uaf_memset+0xb8/0x310 [ 15.434516] kunit_try_run_case+0x170/0x3f0 [ 15.434552] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.434594] kthread+0x328/0x630 [ 15.434625] ret_from_fork+0x10/0x20 [ 15.434671] [ 15.434691] Freed by task 186: [ 15.434718] kasan_save_stack+0x3c/0x68 [ 15.434782] kasan_save_track+0x20/0x40 [ 15.434948] kasan_save_free_info+0x4c/0x78 [ 15.435037] __kasan_slab_free+0x6c/0x98 [ 15.435156] kfree+0x214/0x3c8 [ 15.435234] kmalloc_uaf_memset+0x11c/0x310 [ 15.435320] kunit_try_run_case+0x170/0x3f0 [ 15.435356] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.435421] kthread+0x328/0x630 [ 15.435454] ret_from_fork+0x10/0x20 [ 15.435488] [ 15.435508] The buggy address belongs to the object at fff00000c7010800 [ 15.435508] which belongs to the cache kmalloc-64 of size 64 [ 15.435602] The buggy address is located 0 bytes inside of [ 15.435602] freed 64-byte region [fff00000c7010800, fff00000c7010840) [ 15.435804] [ 15.435865] The buggy address belongs to the physical page: [ 15.435960] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107010 [ 15.436034] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.436083] page_type: f5(slab) [ 15.436164] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 15.436243] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 15.436285] page dumped because: kasan: bad access detected [ 15.436317] [ 15.436336] Memory state around the buggy address: [ 15.436520] fff00000c7010700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.436588] fff00000c7010780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.436743] >fff00000c7010800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 15.436852] ^ [ 15.436879] fff00000c7010880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.436949] fff00000c7010900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.437165] ==================================================================
[ 12.579508] ================================================================== [ 12.580432] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 12.580957] Write of size 33 at addr ffff888102add100 by task kunit_try_catch/203 [ 12.581492] [ 12.581703] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.581747] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.581758] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.581790] Call Trace: [ 12.581801] <TASK> [ 12.581816] dump_stack_lvl+0x73/0xb0 [ 12.581845] print_report+0xd1/0x610 [ 12.581866] ? __virt_addr_valid+0x1db/0x2d0 [ 12.581896] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.581924] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.581945] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.581976] kasan_report+0x141/0x180 [ 12.582018] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.582065] kasan_check_range+0x10c/0x1c0 [ 12.582087] __asan_memset+0x27/0x50 [ 12.582105] kmalloc_uaf_memset+0x1a3/0x360 [ 12.582124] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.582146] ? __schedule+0x10cc/0x2b60 [ 12.582166] ? __pfx_read_tsc+0x10/0x10 [ 12.582186] ? ktime_get_ts64+0x86/0x230 [ 12.582209] kunit_try_run_case+0x1a5/0x480 [ 12.582232] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.582253] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.582274] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.582296] ? __kthread_parkme+0x82/0x180 [ 12.582314] ? preempt_count_sub+0x50/0x80 [ 12.582353] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.582375] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.582397] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.582443] kthread+0x337/0x6f0 [ 12.582463] ? trace_preempt_on+0x20/0xc0 [ 12.582484] ? __pfx_kthread+0x10/0x10 [ 12.582503] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.582523] ? calculate_sigpending+0x7b/0xa0 [ 12.582545] ? __pfx_kthread+0x10/0x10 [ 12.582565] ret_from_fork+0x116/0x1d0 [ 12.582581] ? __pfx_kthread+0x10/0x10 [ 12.582610] ret_from_fork_asm+0x1a/0x30 [ 12.582639] </TASK> [ 12.582648] [ 12.595165] Allocated by task 203: [ 12.595353] kasan_save_stack+0x45/0x70 [ 12.595558] kasan_save_track+0x18/0x40 [ 12.595752] kasan_save_alloc_info+0x3b/0x50 [ 12.595999] __kasan_kmalloc+0xb7/0xc0 [ 12.596270] __kmalloc_cache_noprof+0x189/0x420 [ 12.596519] kmalloc_uaf_memset+0xa9/0x360 [ 12.596661] kunit_try_run_case+0x1a5/0x480 [ 12.596824] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.597007] kthread+0x337/0x6f0 [ 12.597175] ret_from_fork+0x116/0x1d0 [ 12.597359] ret_from_fork_asm+0x1a/0x30 [ 12.597552] [ 12.597645] Freed by task 203: [ 12.597920] kasan_save_stack+0x45/0x70 [ 12.598130] kasan_save_track+0x18/0x40 [ 12.598327] kasan_save_free_info+0x3f/0x60 [ 12.598584] __kasan_slab_free+0x56/0x70 [ 12.598791] kfree+0x222/0x3f0 [ 12.598954] kmalloc_uaf_memset+0x12b/0x360 [ 12.599147] kunit_try_run_case+0x1a5/0x480 [ 12.599319] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.599554] kthread+0x337/0x6f0 [ 12.599753] ret_from_fork+0x116/0x1d0 [ 12.599949] ret_from_fork_asm+0x1a/0x30 [ 12.600147] [ 12.600242] The buggy address belongs to the object at ffff888102add100 [ 12.600242] which belongs to the cache kmalloc-64 of size 64 [ 12.600774] The buggy address is located 0 bytes inside of [ 12.600774] freed 64-byte region [ffff888102add100, ffff888102add140) [ 12.601247] [ 12.601409] The buggy address belongs to the physical page: [ 12.601600] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102add [ 12.601865] flags: 0x200000000000000(node=0|zone=2) [ 12.602039] page_type: f5(slab) [ 12.602158] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.602598] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.602972] page dumped because: kasan: bad access detected [ 12.603229] [ 12.603320] Memory state around the buggy address: [ 12.603605] ffff888102add000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.603961] ffff888102add080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.604276] >ffff888102add100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.604633] ^ [ 12.604800] ffff888102add180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.605070] ffff888102add200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.605452] ==================================================================