Date
July 15, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.052987] ================================================================== [ 18.053226] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 18.053737] Read of size 1 at addr fff00000c59d5fa8 by task kunit_try_catch/190 [ 18.054075] [ 18.054113] CPU: 0 UID: 0 PID: 190 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT [ 18.054217] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.054243] Hardware name: linux,dummy-virt (DT) [ 18.054276] Call trace: [ 18.054297] show_stack+0x20/0x38 (C) [ 18.054390] dump_stack_lvl+0x8c/0xd0 [ 18.054442] print_report+0x118/0x5d0 [ 18.054488] kasan_report+0xdc/0x128 [ 18.054541] __asan_report_load1_noabort+0x20/0x30 [ 18.054599] kmalloc_uaf2+0x3f4/0x468 [ 18.054646] kunit_try_run_case+0x170/0x3f0 [ 18.054704] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.054759] kthread+0x328/0x630 [ 18.054804] ret_from_fork+0x10/0x20 [ 18.054853] [ 18.054871] Allocated by task 190: [ 18.054899] kasan_save_stack+0x3c/0x68 [ 18.054938] kasan_save_track+0x20/0x40 [ 18.054974] kasan_save_alloc_info+0x40/0x58 [ 18.055016] __kasan_kmalloc+0xd4/0xd8 [ 18.055062] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.055110] kmalloc_uaf2+0xc4/0x468 [ 18.055157] kunit_try_run_case+0x170/0x3f0 [ 18.055194] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.055525] kthread+0x328/0x630 [ 18.055657] ret_from_fork+0x10/0x20 [ 18.056255] [ 18.056638] Freed by task 190: [ 18.056804] kasan_save_stack+0x3c/0x68 [ 18.057114] kasan_save_track+0x20/0x40 [ 18.057297] kasan_save_free_info+0x4c/0x78 [ 18.057692] __kasan_slab_free+0x6c/0x98 [ 18.057895] kfree+0x214/0x3c8 [ 18.057942] kmalloc_uaf2+0x134/0x468 [ 18.058166] kunit_try_run_case+0x170/0x3f0 [ 18.058275] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.058352] kthread+0x328/0x630 [ 18.058730] ret_from_fork+0x10/0x20 [ 18.058797] [ 18.058919] The buggy address belongs to the object at fff00000c59d5f80 [ 18.058919] which belongs to the cache kmalloc-64 of size 64 [ 18.059004] The buggy address is located 40 bytes inside of [ 18.059004] freed 64-byte region [fff00000c59d5f80, fff00000c59d5fc0) [ 18.059384] [ 18.059421] The buggy address belongs to the physical page: [ 18.059609] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059d5 [ 18.059824] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.059998] page_type: f5(slab) [ 18.060040] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.060562] raw: 0000000000000000 0000000000200020 00000000f5000000 0000000000000000 [ 18.060644] page dumped because: kasan: bad access detected [ 18.060679] [ 18.060835] Memory state around the buggy address: [ 18.061057] fff00000c59d5e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.061163] fff00000c59d5f00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.061224] >fff00000c59d5f80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.061658] ^ [ 18.061730] fff00000c59d6000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 18.061786] fff00000c59d6080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 18.061826] ==================================================================
[ 11.298088] ================================================================== [ 11.298542] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 11.298841] Read of size 1 at addr ffff888102f39328 by task kunit_try_catch/207 [ 11.299203] [ 11.299298] CPU: 1 UID: 0 PID: 207 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT(voluntary) [ 11.299338] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.299349] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.299367] Call Trace: [ 11.299377] <TASK> [ 11.299390] dump_stack_lvl+0x73/0xb0 [ 11.299412] print_report+0xd1/0x610 [ 11.299435] ? __virt_addr_valid+0x1db/0x2d0 [ 11.299455] ? kmalloc_uaf2+0x4a8/0x520 [ 11.299475] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.299497] ? kmalloc_uaf2+0x4a8/0x520 [ 11.299518] kasan_report+0x141/0x180 [ 11.299539] ? kmalloc_uaf2+0x4a8/0x520 [ 11.299564] __asan_report_load1_noabort+0x18/0x20 [ 11.299584] kmalloc_uaf2+0x4a8/0x520 [ 11.299605] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.299624] ? __schedule+0x207f/0x2b60 [ 11.299644] ? schedule+0x7c/0x2e0 [ 11.299664] ? trace_hardirqs_on+0x37/0xe0 [ 11.299687] ? __schedule+0x207f/0x2b60 [ 11.299708] ? __pfx_read_tsc+0x10/0x10 [ 11.299727] ? ktime_get_ts64+0x86/0x230 [ 11.299750] kunit_try_run_case+0x1a5/0x480 [ 11.299769] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.299787] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.299809] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.299832] ? __kthread_parkme+0x82/0x180 [ 11.299853] ? preempt_count_sub+0x50/0x80 [ 11.299876] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.299908] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.299930] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.299952] kthread+0x337/0x6f0 [ 11.299968] ? trace_preempt_on+0x20/0xc0 [ 11.299989] ? __pfx_kthread+0x10/0x10 [ 11.300007] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.300027] ? calculate_sigpending+0x7b/0xa0 [ 11.300048] ? __pfx_kthread+0x10/0x10 [ 11.300065] ret_from_fork+0x41/0x80 [ 11.300084] ? __pfx_kthread+0x10/0x10 [ 11.300101] ret_from_fork_asm+0x1a/0x30 [ 11.300131] </TASK> [ 11.300140] [ 11.307465] Allocated by task 207: [ 11.307646] kasan_save_stack+0x45/0x70 [ 11.307859] kasan_save_track+0x18/0x40 [ 11.308084] kasan_save_alloc_info+0x3b/0x50 [ 11.308294] __kasan_kmalloc+0xb7/0xc0 [ 11.308487] __kmalloc_cache_noprof+0x189/0x420 [ 11.308705] kmalloc_uaf2+0xc6/0x520 [ 11.308910] kunit_try_run_case+0x1a5/0x480 [ 11.309092] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.309272] kthread+0x337/0x6f0 [ 11.309389] ret_from_fork+0x41/0x80 [ 11.309548] ret_from_fork_asm+0x1a/0x30 [ 11.309747] [ 11.309899] Freed by task 207: [ 11.310069] kasan_save_stack+0x45/0x70 [ 11.310268] kasan_save_track+0x18/0x40 [ 11.310455] kasan_save_free_info+0x3f/0x60 [ 11.310633] __kasan_slab_free+0x56/0x70 [ 11.311073] kfree+0x222/0x3f0 [ 11.311209] kmalloc_uaf2+0x14c/0x520 [ 11.311435] kunit_try_run_case+0x1a5/0x480 [ 11.311587] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.311760] kthread+0x337/0x6f0 [ 11.311876] ret_from_fork+0x41/0x80 [ 11.312019] ret_from_fork_asm+0x1a/0x30 [ 11.312161] [ 11.312242] The buggy address belongs to the object at ffff888102f39300 [ 11.312242] which belongs to the cache kmalloc-64 of size 64 [ 11.312757] The buggy address is located 40 bytes inside of [ 11.312757] freed 64-byte region [ffff888102f39300, ffff888102f39340) [ 11.313480] [ 11.313552] The buggy address belongs to the physical page: [ 11.313720] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f39 [ 11.313969] flags: 0x200000000000000(node=0|zone=2) [ 11.314130] page_type: f5(slab) [ 11.314247] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.314988] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.315334] page dumped because: kasan: bad access detected [ 11.315587] [ 11.315680] Memory state around the buggy address: [ 11.315912] ffff888102f39200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.316308] ffff888102f39280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.316548] >ffff888102f39300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.316752] ^ [ 11.317327] ffff888102f39380: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 11.317659] ffff888102f39400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.318108] ==================================================================