Date
June 3, 2025, 7:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.418172] ================================================================== [ 18.418254] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 18.418315] Write of size 33 at addr fff00000c65b5c80 by task kunit_try_catch/186 [ 18.418380] [ 18.418442] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT [ 18.418531] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.418557] Hardware name: linux,dummy-virt (DT) [ 18.418589] Call trace: [ 18.418620] show_stack+0x20/0x38 (C) [ 18.418671] dump_stack_lvl+0x8c/0xd0 [ 18.418720] print_report+0x118/0x608 [ 18.418768] kasan_report+0xdc/0x128 [ 18.418812] kasan_check_range+0x100/0x1a8 [ 18.418861] __asan_memset+0x34/0x78 [ 18.418987] kmalloc_uaf_memset+0x170/0x310 [ 18.419078] kunit_try_run_case+0x170/0x3f0 [ 18.419156] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.419211] kthread+0x328/0x630 [ 18.419273] ret_from_fork+0x10/0x20 [ 18.419329] [ 18.419374] Allocated by task 186: [ 18.419404] kasan_save_stack+0x3c/0x68 [ 18.419483] kasan_save_track+0x20/0x40 [ 18.419524] kasan_save_alloc_info+0x40/0x58 [ 18.419592] __kasan_kmalloc+0xd4/0xd8 [ 18.419631] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.419671] kmalloc_uaf_memset+0xb8/0x310 [ 18.419706] kunit_try_run_case+0x170/0x3f0 [ 18.419795] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.419939] kthread+0x328/0x630 [ 18.420026] ret_from_fork+0x10/0x20 [ 18.420138] [ 18.420200] Freed by task 186: [ 18.420247] kasan_save_stack+0x3c/0x68 [ 18.420285] kasan_save_track+0x20/0x40 [ 18.420320] kasan_save_free_info+0x4c/0x78 [ 18.420382] __kasan_slab_free+0x6c/0x98 [ 18.420433] kfree+0x214/0x3c8 [ 18.420465] kmalloc_uaf_memset+0x11c/0x310 [ 18.420502] kunit_try_run_case+0x170/0x3f0 [ 18.420619] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.420662] kthread+0x328/0x630 [ 18.420746] ret_from_fork+0x10/0x20 [ 18.420805] [ 18.420893] The buggy address belongs to the object at fff00000c65b5c80 [ 18.420893] which belongs to the cache kmalloc-64 of size 64 [ 18.420978] The buggy address is located 0 bytes inside of [ 18.420978] freed 64-byte region [fff00000c65b5c80, fff00000c65b5cc0) [ 18.421106] [ 18.421170] The buggy address belongs to the physical page: [ 18.421221] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065b5 [ 18.421327] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.421400] page_type: f5(slab) [ 18.421451] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.421541] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.421802] page dumped because: kasan: bad access detected [ 18.421873] [ 18.421945] Memory state around the buggy address: [ 18.422030] fff00000c65b5b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.422131] fff00000c65b5c00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.422184] >fff00000c65b5c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.422230] ^ [ 18.422533] fff00000c65b5d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.422635] fff00000c65b5d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.422742] ==================================================================
[ 14.881103] ================================================================== [ 14.881806] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 14.882367] Write of size 33 at addr ffff888103333880 by task kunit_try_catch/203 [ 14.882825] [ 14.883024] CPU: 1 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT(voluntary) [ 14.883123] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.883152] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.883200] Call Trace: [ 14.883232] <TASK> [ 14.883277] dump_stack_lvl+0x73/0xb0 [ 14.883357] print_report+0xd1/0x650 [ 14.883403] ? __virt_addr_valid+0x1db/0x2d0 [ 14.883450] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.884223] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.884282] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.884327] kasan_report+0x141/0x180 [ 14.884377] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.884434] kasan_check_range+0x10c/0x1c0 [ 14.884501] __asan_memset+0x27/0x50 [ 14.884549] kmalloc_uaf_memset+0x1a3/0x360 [ 14.884599] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 14.884655] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 14.884758] kunit_try_run_case+0x1a5/0x480 [ 14.884814] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.884851] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.884893] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.884934] ? __kthread_parkme+0x82/0x180 [ 14.884972] ? preempt_count_sub+0x50/0x80 [ 14.885013] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.885047] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.885090] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.885127] kthread+0x337/0x6f0 [ 14.885149] ? trace_preempt_on+0x20/0xc0 [ 14.885176] ? __pfx_kthread+0x10/0x10 [ 14.885220] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.885253] ? calculate_sigpending+0x7b/0xa0 [ 14.885281] ? __pfx_kthread+0x10/0x10 [ 14.885304] ret_from_fork+0x116/0x1d0 [ 14.885327] ? __pfx_kthread+0x10/0x10 [ 14.885349] ret_from_fork_asm+0x1a/0x30 [ 14.885386] </TASK> [ 14.885400] [ 14.897484] Allocated by task 203: [ 14.897971] kasan_save_stack+0x45/0x70 [ 14.898857] kasan_save_track+0x18/0x40 [ 14.899112] kasan_save_alloc_info+0x3b/0x50 [ 14.899862] __kasan_kmalloc+0xb7/0xc0 [ 14.900826] __kmalloc_cache_noprof+0x189/0x420 [ 14.901081] kmalloc_uaf_memset+0xa9/0x360 [ 14.901638] kunit_try_run_case+0x1a5/0x480 [ 14.902241] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.902912] kthread+0x337/0x6f0 [ 14.903114] ret_from_fork+0x116/0x1d0 [ 14.903616] ret_from_fork_asm+0x1a/0x30 [ 14.904169] [ 14.904580] Freed by task 203: [ 14.904827] kasan_save_stack+0x45/0x70 [ 14.905310] kasan_save_track+0x18/0x40 [ 14.905495] kasan_save_free_info+0x3f/0x60 [ 14.905978] __kasan_slab_free+0x56/0x70 [ 14.906621] kfree+0x222/0x3f0 [ 14.907235] kmalloc_uaf_memset+0x12b/0x360 [ 14.907590] kunit_try_run_case+0x1a5/0x480 [ 14.907804] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.908090] kthread+0x337/0x6f0 [ 14.908711] ret_from_fork+0x116/0x1d0 [ 14.909410] ret_from_fork_asm+0x1a/0x30 [ 14.909905] [ 14.910103] The buggy address belongs to the object at ffff888103333880 [ 14.910103] which belongs to the cache kmalloc-64 of size 64 [ 14.910752] The buggy address is located 0 bytes inside of [ 14.910752] freed 64-byte region [ffff888103333880, ffff8881033338c0) [ 14.911652] [ 14.911820] The buggy address belongs to the physical page: [ 14.912094] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103333 [ 14.912721] flags: 0x200000000000000(node=0|zone=2) [ 14.912998] page_type: f5(slab) [ 14.913183] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 14.913857] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 14.914236] page dumped because: kasan: bad access detected [ 14.914639] [ 14.914753] Memory state around the buggy address: [ 14.915136] ffff888103333780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.915711] ffff888103333800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.915996] >ffff888103333880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.917614] ^ [ 14.918028] ffff888103333900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.918682] ffff888103333980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.919647] ==================================================================