Date
May 29, 2025, 7:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.899930] ================================================================== [ 21.900136] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 21.900308] Write of size 33 at addr fff00000c5e38980 by task kunit_try_catch/186 [ 21.900495] [ 21.900634] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT [ 21.900935] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.901001] Hardware name: linux,dummy-virt (DT) [ 21.901089] Call trace: [ 21.901174] show_stack+0x20/0x38 (C) [ 21.901360] dump_stack_lvl+0x8c/0xd0 [ 21.901491] print_report+0x118/0x608 [ 21.901606] kasan_report+0xdc/0x128 [ 21.901821] kasan_check_range+0x100/0x1a8 [ 21.902005] __asan_memset+0x34/0x78 [ 21.902170] kmalloc_uaf_memset+0x170/0x310 [ 21.902288] kunit_try_run_case+0x170/0x3f0 [ 21.902426] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.902583] kthread+0x328/0x630 [ 21.902712] ret_from_fork+0x10/0x20 [ 21.902851] [ 21.902900] Allocated by task 186: [ 21.902961] kasan_save_stack+0x3c/0x68 [ 21.903139] kasan_save_track+0x20/0x40 [ 21.903227] kasan_save_alloc_info+0x40/0x58 [ 21.903305] __kasan_kmalloc+0xd4/0xd8 [ 21.903385] __kmalloc_cache_noprof+0x15c/0x3c0 [ 21.903485] kmalloc_uaf_memset+0xb8/0x310 [ 21.903573] kunit_try_run_case+0x170/0x3f0 [ 21.903672] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.903782] kthread+0x328/0x630 [ 21.903861] ret_from_fork+0x10/0x20 [ 21.903963] [ 21.904027] Freed by task 186: [ 21.904124] kasan_save_stack+0x3c/0x68 [ 21.904206] kasan_save_track+0x20/0x40 [ 21.904295] kasan_save_free_info+0x4c/0x78 [ 21.904510] __kasan_slab_free+0x6c/0x98 [ 21.904648] kfree+0x214/0x3c8 [ 21.904730] kmalloc_uaf_memset+0x11c/0x310 [ 21.904838] kunit_try_run_case+0x170/0x3f0 [ 21.904988] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.905104] kthread+0x328/0x630 [ 21.905184] ret_from_fork+0x10/0x20 [ 21.905276] [ 21.905341] The buggy address belongs to the object at fff00000c5e38980 [ 21.905341] which belongs to the cache kmalloc-64 of size 64 [ 21.905580] The buggy address is located 0 bytes inside of [ 21.905580] freed 64-byte region [fff00000c5e38980, fff00000c5e389c0) [ 21.905772] [ 21.905845] The buggy address belongs to the physical page: [ 21.905926] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105e38 [ 21.906152] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.906344] page_type: f5(slab) [ 21.906443] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 21.906562] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 21.906671] page dumped because: kasan: bad access detected [ 21.906759] [ 21.906806] Memory state around the buggy address: [ 21.906951] fff00000c5e38880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.907065] fff00000c5e38900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.907167] >fff00000c5e38980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.907269] ^ [ 21.907346] fff00000c5e38a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.907475] fff00000c5e38a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.907578] ==================================================================
[ 11.131076] ================================================================== [ 11.131549] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.132065] Write of size 33 at addr ffff888102f99080 by task kunit_try_catch/203 [ 11.132362] [ 11.132566] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT(voluntary) [ 11.132649] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.132663] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.132685] Call Trace: [ 11.132698] <TASK> [ 11.132715] dump_stack_lvl+0x73/0xb0 [ 11.132745] print_report+0xd1/0x650 [ 11.132889] ? __virt_addr_valid+0x1db/0x2d0 [ 11.132915] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.132936] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.132959] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.132981] kasan_report+0x141/0x180 [ 11.133003] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.133030] kasan_check_range+0x10c/0x1c0 [ 11.133070] __asan_memset+0x27/0x50 [ 11.133091] kmalloc_uaf_memset+0x1a3/0x360 [ 11.133112] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.133135] ? __schedule+0x10cc/0x2b60 [ 11.133159] ? __pfx_read_tsc+0x10/0x10 [ 11.133180] ? ktime_get_ts64+0x86/0x230 [ 11.133205] kunit_try_run_case+0x1a5/0x480 [ 11.133227] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.133260] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.133285] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.133309] ? __kthread_parkme+0x82/0x180 [ 11.133329] ? preempt_count_sub+0x50/0x80 [ 11.133353] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.133374] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.133398] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.133422] kthread+0x337/0x6f0 [ 11.133441] ? trace_preempt_on+0x20/0xc0 [ 11.133465] ? __pfx_kthread+0x10/0x10 [ 11.133485] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.133507] ? calculate_sigpending+0x7b/0xa0 [ 11.133531] ? __pfx_kthread+0x10/0x10 [ 11.133552] ret_from_fork+0x116/0x1d0 [ 11.133570] ? __pfx_kthread+0x10/0x10 [ 11.133590] ret_from_fork_asm+0x1a/0x30 [ 11.133634] </TASK> [ 11.133645] [ 11.143456] Allocated by task 203: [ 11.143604] kasan_save_stack+0x45/0x70 [ 11.144017] kasan_save_track+0x18/0x40 [ 11.144248] kasan_save_alloc_info+0x3b/0x50 [ 11.144501] __kasan_kmalloc+0xb7/0xc0 [ 11.144738] __kmalloc_cache_noprof+0x189/0x420 [ 11.144992] kmalloc_uaf_memset+0xa9/0x360 [ 11.145354] kunit_try_run_case+0x1a5/0x480 [ 11.146084] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.146303] kthread+0x337/0x6f0 [ 11.146477] ret_from_fork+0x116/0x1d0 [ 11.146707] ret_from_fork_asm+0x1a/0x30 [ 11.147253] [ 11.147384] Freed by task 203: [ 11.147555] kasan_save_stack+0x45/0x70 [ 11.148026] kasan_save_track+0x18/0x40 [ 11.148241] kasan_save_free_info+0x3f/0x60 [ 11.148575] __kasan_slab_free+0x56/0x70 [ 11.148798] kfree+0x222/0x3f0 [ 11.149089] kmalloc_uaf_memset+0x12b/0x360 [ 11.149445] kunit_try_run_case+0x1a5/0x480 [ 11.149672] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.150250] kthread+0x337/0x6f0 [ 11.150540] ret_from_fork+0x116/0x1d0 [ 11.150939] ret_from_fork_asm+0x1a/0x30 [ 11.151261] [ 11.151380] The buggy address belongs to the object at ffff888102f99080 [ 11.151380] which belongs to the cache kmalloc-64 of size 64 [ 11.152208] The buggy address is located 0 bytes inside of [ 11.152208] freed 64-byte region [ffff888102f99080, ffff888102f990c0) [ 11.152985] [ 11.153090] The buggy address belongs to the physical page: [ 11.153477] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f99 [ 11.154069] flags: 0x200000000000000(node=0|zone=2) [ 11.154301] page_type: f5(slab) [ 11.154473] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.154957] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.155261] page dumped because: kasan: bad access detected [ 11.155524] [ 11.155623] Memory state around the buggy address: [ 11.155804] ffff888102f98f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.156212] ffff888102f99000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.156506] >ffff888102f99080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.156794] ^ [ 11.157050] ffff888102f99100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.157327] ffff888102f99180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.157598] ==================================================================