Date
July 18, 2025, 1:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.653119] ================================================================== [ 31.653192] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 31.653390] Write of size 33 at addr fff00000c9a42280 by task kunit_try_catch/217 [ 31.653452] [ 31.653520] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT [ 31.653613] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.653939] Hardware name: linux,dummy-virt (DT) [ 31.653989] Call trace: [ 31.654112] show_stack+0x20/0x38 (C) [ 31.654198] dump_stack_lvl+0x8c/0xd0 [ 31.654249] print_report+0x118/0x5e8 [ 31.654553] kasan_report+0xdc/0x128 [ 31.654607] kasan_check_range+0x100/0x1a8 [ 31.654654] __asan_memset+0x34/0x78 [ 31.654697] kmalloc_uaf_memset+0x170/0x310 [ 31.655060] kunit_try_run_case+0x170/0x3f0 [ 31.655167] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.655264] kthread+0x328/0x630 [ 31.655307] ret_from_fork+0x10/0x20 [ 31.655498] [ 31.655517] Allocated by task 217: [ 31.655546] kasan_save_stack+0x3c/0x68 [ 31.655753] kasan_save_track+0x20/0x40 [ 31.655813] kasan_save_alloc_info+0x40/0x58 [ 31.655852] __kasan_kmalloc+0xd4/0xd8 [ 31.655892] __kmalloc_cache_noprof+0x16c/0x3c0 [ 31.655932] kmalloc_uaf_memset+0xb8/0x310 [ 31.655968] kunit_try_run_case+0x170/0x3f0 [ 31.656005] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.656389] kthread+0x328/0x630 [ 31.656475] ret_from_fork+0x10/0x20 [ 31.656513] [ 31.656569] Freed by task 217: [ 31.656882] kasan_save_stack+0x3c/0x68 [ 31.657113] kasan_save_track+0x20/0x40 [ 31.657332] kasan_save_free_info+0x4c/0x78 [ 31.657663] __kasan_slab_free+0x6c/0x98 [ 31.657736] kfree+0x214/0x3c8 [ 31.657786] kmalloc_uaf_memset+0x11c/0x310 [ 31.657943] kunit_try_run_case+0x170/0x3f0 [ 31.658103] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.658198] kthread+0x328/0x630 [ 31.658335] ret_from_fork+0x10/0x20 [ 31.658375] [ 31.658411] The buggy address belongs to the object at fff00000c9a42280 [ 31.658411] which belongs to the cache kmalloc-64 of size 64 [ 31.658478] The buggy address is located 0 bytes inside of [ 31.658478] freed 64-byte region [fff00000c9a42280, fff00000c9a422c0) [ 31.658539] [ 31.658671] The buggy address belongs to the physical page: [ 31.658725] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a42 [ 31.658779] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.658829] page_type: f5(slab) [ 31.658879] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 31.658927] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 31.658978] page dumped because: kasan: bad access detected [ 31.659016] [ 31.659042] Memory state around the buggy address: [ 31.659088] fff00000c9a42180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.659132] fff00000c9a42200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.659174] >fff00000c9a42280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.659210] ^ [ 31.659237] fff00000c9a42300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.659279] fff00000c9a42380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.659318] ==================================================================
[ 25.095168] ================================================================== [ 25.096262] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 25.097172] Write of size 33 at addr ffff888102b42780 by task kunit_try_catch/234 [ 25.097422] [ 25.097516] CPU: 1 UID: 0 PID: 234 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT(voluntary) [ 25.097567] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.097579] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.097602] Call Trace: [ 25.097615] <TASK> [ 25.097633] dump_stack_lvl+0x73/0xb0 [ 25.097669] print_report+0xd1/0x640 [ 25.097692] ? __virt_addr_valid+0x1db/0x2d0 [ 25.097718] ? kmalloc_uaf_memset+0x1a3/0x360 [ 25.097739] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.097763] ? kmalloc_uaf_memset+0x1a3/0x360 [ 25.097784] kasan_report+0x141/0x180 [ 25.097805] ? kmalloc_uaf_memset+0x1a3/0x360 [ 25.097830] kasan_check_range+0x10c/0x1c0 [ 25.097852] __asan_memset+0x27/0x50 [ 25.097874] kmalloc_uaf_memset+0x1a3/0x360 [ 25.097893] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 25.097914] ? __schedule+0x10da/0x2b60 [ 25.097938] ? __pfx_read_tsc+0x10/0x10 [ 25.097959] ? ktime_get_ts64+0x86/0x230 [ 25.097985] kunit_try_run_case+0x1a5/0x480 [ 25.098010] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.098031] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.098063] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.098095] ? __kthread_parkme+0x82/0x180 [ 25.098115] ? preempt_count_sub+0x50/0x80 [ 25.098138] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.098160] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.098182] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.098214] kthread+0x337/0x6f0 [ 25.098232] ? trace_preempt_on+0x20/0xc0 [ 25.098256] ? __pfx_kthread+0x10/0x10 [ 25.098275] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.098304] ? calculate_sigpending+0x7b/0xa0 [ 25.098328] ? __pfx_kthread+0x10/0x10 [ 25.098348] ret_from_fork+0x116/0x1d0 [ 25.098366] ? __pfx_kthread+0x10/0x10 [ 25.098385] ret_from_fork_asm+0x1a/0x30 [ 25.098416] </TASK> [ 25.098427] [ 25.113671] Allocated by task 234: [ 25.113925] kasan_save_stack+0x45/0x70 [ 25.114730] kasan_save_track+0x18/0x40 [ 25.115255] kasan_save_alloc_info+0x3b/0x50 [ 25.115845] __kasan_kmalloc+0xb7/0xc0 [ 25.116406] __kmalloc_cache_noprof+0x189/0x420 [ 25.116921] kmalloc_uaf_memset+0xa9/0x360 [ 25.117573] kunit_try_run_case+0x1a5/0x480 [ 25.118134] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.118910] kthread+0x337/0x6f0 [ 25.119234] ret_from_fork+0x116/0x1d0 [ 25.119369] ret_from_fork_asm+0x1a/0x30 [ 25.119503] [ 25.119568] Freed by task 234: [ 25.119674] kasan_save_stack+0x45/0x70 [ 25.119808] kasan_save_track+0x18/0x40 [ 25.120328] kasan_save_free_info+0x3f/0x60 [ 25.120479] __kasan_slab_free+0x56/0x70 [ 25.120605] kfree+0x222/0x3f0 [ 25.120713] kmalloc_uaf_memset+0x12b/0x360 [ 25.120879] kunit_try_run_case+0x1a5/0x480 [ 25.121019] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.121380] kthread+0x337/0x6f0 [ 25.121547] ret_from_fork+0x116/0x1d0 [ 25.121676] ret_from_fork_asm+0x1a/0x30 [ 25.121844] [ 25.122015] The buggy address belongs to the object at ffff888102b42780 [ 25.122015] which belongs to the cache kmalloc-64 of size 64 [ 25.122608] The buggy address is located 0 bytes inside of [ 25.122608] freed 64-byte region [ffff888102b42780, ffff888102b427c0) [ 25.123322] [ 25.123397] The buggy address belongs to the physical page: [ 25.123566] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b42 [ 25.123901] flags: 0x200000000000000(node=0|zone=2) [ 25.124374] page_type: f5(slab) [ 25.124707] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 25.125577] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 25.126337] page dumped because: kasan: bad access detected [ 25.126924] [ 25.127172] Memory state around the buggy address: [ 25.127710] ffff888102b42680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.128172] ffff888102b42700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.128404] >ffff888102b42780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.128623] ^ [ 25.128736] ffff888102b42800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.129472] ffff888102b42880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.130175] ==================================================================