Date
July 24, 2025, 4:41 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.659098] ================================================================== [ 32.659377] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 32.659513] Write of size 33 at addr fff00000c9a87c80 by task kunit_try_catch/217 [ 32.659595] [ 32.659822] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250724 #1 PREEMPT [ 32.660069] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.660107] Hardware name: linux,dummy-virt (DT) [ 32.660472] Call trace: [ 32.660629] show_stack+0x20/0x38 (C) [ 32.660727] dump_stack_lvl+0x8c/0xd0 [ 32.661137] print_report+0x118/0x5e8 [ 32.661242] kasan_report+0xdc/0x128 [ 32.661328] kasan_check_range+0x100/0x1a8 [ 32.661521] __asan_memset+0x34/0x78 [ 32.661801] kmalloc_uaf_memset+0x170/0x310 [ 32.661859] kunit_try_run_case+0x170/0x3f0 [ 32.662260] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.662392] kthread+0x328/0x630 [ 32.662450] ret_from_fork+0x10/0x20 [ 32.662742] [ 32.662927] Allocated by task 217: [ 32.663006] kasan_save_stack+0x3c/0x68 [ 32.663124] kasan_save_track+0x20/0x40 [ 32.663166] kasan_save_alloc_info+0x40/0x58 [ 32.663203] __kasan_kmalloc+0xd4/0xd8 [ 32.663409] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.663744] kmalloc_uaf_memset+0xb8/0x310 [ 32.663985] kunit_try_run_case+0x170/0x3f0 [ 32.664226] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.664297] kthread+0x328/0x630 [ 32.664336] ret_from_fork+0x10/0x20 [ 32.664373] [ 32.664392] Freed by task 217: [ 32.664419] kasan_save_stack+0x3c/0x68 [ 32.664455] kasan_save_track+0x20/0x40 [ 32.664511] kasan_save_free_info+0x4c/0x78 [ 32.664563] __kasan_slab_free+0x6c/0x98 [ 32.664599] kfree+0x214/0x3c8 [ 32.664642] kmalloc_uaf_memset+0x11c/0x310 [ 32.664683] kunit_try_run_case+0x170/0x3f0 [ 32.664727] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.664788] kthread+0x328/0x630 [ 32.664821] ret_from_fork+0x10/0x20 [ 32.664855] [ 32.664876] The buggy address belongs to the object at fff00000c9a87c80 [ 32.664876] which belongs to the cache kmalloc-64 of size 64 [ 32.664948] The buggy address is located 0 bytes inside of [ 32.664948] freed 64-byte region [fff00000c9a87c80, fff00000c9a87cc0) [ 32.665015] [ 32.665039] The buggy address belongs to the physical page: [ 32.665077] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a87 [ 32.665133] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.665205] page_type: f5(slab) [ 32.665249] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 32.665298] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 32.665347] page dumped because: kasan: bad access detected [ 32.665387] [ 32.665405] Memory state around the buggy address: [ 32.665448] fff00000c9a87b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.665509] fff00000c9a87c00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.665561] >fff00000c9a87c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.665601] ^ [ 32.665627] fff00000c9a87d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.665670] fff00000c9a87d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.665724] ==================================================================
[ 27.124621] ================================================================== [ 27.125184] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 27.125477] Write of size 33 at addr ffff888105464000 by task kunit_try_catch/234 [ 27.125778] [ 27.125946] CPU: 0 UID: 0 PID: 234 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) [ 27.125998] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 27.126012] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.126033] Call Trace: [ 27.126046] <TASK> [ 27.126064] dump_stack_lvl+0x73/0xb0 [ 27.126092] print_report+0xd1/0x640 [ 27.126172] ? __virt_addr_valid+0x1db/0x2d0 [ 27.126197] ? kmalloc_uaf_memset+0x1a3/0x360 [ 27.126218] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.126242] ? kmalloc_uaf_memset+0x1a3/0x360 [ 27.126263] kasan_report+0x141/0x180 [ 27.126284] ? kmalloc_uaf_memset+0x1a3/0x360 [ 27.126309] kasan_check_range+0x10c/0x1c0 [ 27.126332] __asan_memset+0x27/0x50 [ 27.126354] kmalloc_uaf_memset+0x1a3/0x360 [ 27.126375] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 27.126396] ? __schedule+0x10da/0x2b60 [ 27.126425] ? __pfx_read_tsc+0x10/0x10 [ 27.126447] ? ktime_get_ts64+0x86/0x230 [ 27.126472] kunit_try_run_case+0x1a5/0x480 [ 27.126498] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.126519] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.126544] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.126568] ? __kthread_parkme+0x82/0x180 [ 27.126600] ? preempt_count_sub+0x50/0x80 [ 27.126622] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.126645] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.126667] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.126690] kthread+0x337/0x6f0 [ 27.126709] ? trace_preempt_on+0x20/0xc0 [ 27.126733] ? __pfx_kthread+0x10/0x10 [ 27.126753] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.126775] ? calculate_sigpending+0x7b/0xa0 [ 27.126954] ? __pfx_kthread+0x10/0x10 [ 27.126976] ret_from_fork+0x116/0x1d0 [ 27.126996] ? __pfx_kthread+0x10/0x10 [ 27.127016] ret_from_fork_asm+0x1a/0x30 [ 27.127048] </TASK> [ 27.127058] [ 27.134180] Allocated by task 234: [ 27.134356] kasan_save_stack+0x45/0x70 [ 27.134534] kasan_save_track+0x18/0x40 [ 27.134689] kasan_save_alloc_info+0x3b/0x50 [ 27.134831] __kasan_kmalloc+0xb7/0xc0 [ 27.135237] __kmalloc_cache_noprof+0x189/0x420 [ 27.135492] kmalloc_uaf_memset+0xa9/0x360 [ 27.135674] kunit_try_run_case+0x1a5/0x480 [ 27.135980] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.136248] kthread+0x337/0x6f0 [ 27.136363] ret_from_fork+0x116/0x1d0 [ 27.136487] ret_from_fork_asm+0x1a/0x30 [ 27.136653] [ 27.136744] Freed by task 234: [ 27.136890] kasan_save_stack+0x45/0x70 [ 27.137081] kasan_save_track+0x18/0x40 [ 27.137376] kasan_save_free_info+0x3f/0x60 [ 27.137672] __kasan_slab_free+0x56/0x70 [ 27.139153] kfree+0x222/0x3f0 [ 27.139365] kmalloc_uaf_memset+0x12b/0x360 [ 27.139570] kunit_try_run_case+0x1a5/0x480 [ 27.139746] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.140036] kthread+0x337/0x6f0 [ 27.140209] ret_from_fork+0x116/0x1d0 [ 27.140357] ret_from_fork_asm+0x1a/0x30 [ 27.140555] [ 27.140649] The buggy address belongs to the object at ffff888105464000 [ 27.140649] which belongs to the cache kmalloc-64 of size 64 [ 27.141202] The buggy address is located 0 bytes inside of [ 27.141202] freed 64-byte region [ffff888105464000, ffff888105464040) [ 27.141557] [ 27.141663] The buggy address belongs to the physical page: [ 27.141924] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105464 [ 27.142558] flags: 0x200000000000000(node=0|zone=2) [ 27.142739] page_type: f5(slab) [ 27.143044] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 27.143356] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 27.143650] page dumped because: kasan: bad access detected [ 27.143864] [ 27.143949] Memory state around the buggy address: [ 27.144134] ffff888105463f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.144680] ffff888105463f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.145080] >ffff888105464000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.145293] ^ [ 27.145433] ffff888105464080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.145756] ffff888105464100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.146055] ==================================================================