Date
June 17, 2025, 3:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.011717] ================================================================== [ 22.013528] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 22.013683] Read of size 1 at addr fff00000c58df328 by task kunit_try_catch/190 [ 22.013821] [ 22.013907] CPU: 0 UID: 0 PID: 190 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 22.014070] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.014129] Hardware name: linux,dummy-virt (DT) [ 22.014190] Call trace: [ 22.014237] show_stack+0x20/0x38 (C) [ 22.014351] dump_stack_lvl+0x8c/0xd0 [ 22.014460] print_report+0x118/0x608 [ 22.014557] kasan_report+0xdc/0x128 [ 22.014646] __asan_report_load1_noabort+0x20/0x30 [ 22.014770] kmalloc_uaf2+0x3f4/0x468 [ 22.014871] kunit_try_run_case+0x170/0x3f0 [ 22.014985] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.015102] kthread+0x328/0x630 [ 22.015205] ret_from_fork+0x10/0x20 [ 22.015320] [ 22.015362] Allocated by task 190: [ 22.015427] kasan_save_stack+0x3c/0x68 [ 22.015519] kasan_save_track+0x20/0x40 [ 22.015602] kasan_save_alloc_info+0x40/0x58 [ 22.015687] __kasan_kmalloc+0xd4/0xd8 [ 22.017131] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.017268] kmalloc_uaf2+0xc4/0x468 [ 22.017377] kunit_try_run_case+0x170/0x3f0 [ 22.017502] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.017596] kthread+0x328/0x630 [ 22.017674] ret_from_fork+0x10/0x20 [ 22.017775] [ 22.017817] Freed by task 190: [ 22.017875] kasan_save_stack+0x3c/0x68 [ 22.017947] kasan_save_track+0x20/0x40 [ 22.018022] kasan_save_free_info+0x4c/0x78 [ 22.018105] __kasan_slab_free+0x6c/0x98 [ 22.018190] kfree+0x214/0x3c8 [ 22.018270] kmalloc_uaf2+0x134/0x468 [ 22.018364] kunit_try_run_case+0x170/0x3f0 [ 22.018457] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.018550] kthread+0x328/0x630 [ 22.018628] ret_from_fork+0x10/0x20 [ 22.018710] [ 22.018775] The buggy address belongs to the object at fff00000c58df300 [ 22.018775] which belongs to the cache kmalloc-64 of size 64 [ 22.018930] The buggy address is located 40 bytes inside of [ 22.018930] freed 64-byte region [fff00000c58df300, fff00000c58df340) [ 22.019091] [ 22.019157] The buggy address belongs to the physical page: [ 22.019253] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058df [ 22.019415] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.019541] page_type: f5(slab) [ 22.019694] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 22.020040] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 22.020162] page dumped because: kasan: bad access detected [ 22.020225] [ 22.020269] Memory state around the buggy address: [ 22.020336] fff00000c58df200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.020497] fff00000c58df280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.020595] >fff00000c58df300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.020681] ^ [ 22.020827] fff00000c58df380: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 22.020941] fff00000c58df400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.021037] ==================================================================
[ 19.737506] ================================================================== [ 19.738899] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 19.739668] Read of size 1 at addr ffff8881030a1ba8 by task kunit_try_catch/208 [ 19.741316] [ 19.741883] CPU: 0 UID: 0 PID: 208 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 19.741999] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.742039] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 19.742099] Call Trace: [ 19.742144] <TASK> [ 19.742216] dump_stack_lvl+0x73/0xb0 [ 19.742318] print_report+0xd1/0x650 [ 19.742549] ? __virt_addr_valid+0x1db/0x2d0 [ 19.742590] ? kmalloc_uaf2+0x4a8/0x520 [ 19.742622] ? kasan_complete_mode_report_info+0x64/0x200 [ 19.742657] ? kmalloc_uaf2+0x4a8/0x520 [ 19.742690] kasan_report+0x141/0x180 [ 19.742726] ? kmalloc_uaf2+0x4a8/0x520 [ 19.742764] __asan_report_load1_noabort+0x18/0x20 [ 19.742796] kmalloc_uaf2+0x4a8/0x520 [ 19.742830] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 19.742860] ? finish_task_switch.isra.0+0x153/0x700 [ 19.742897] ? __switch_to+0x5d9/0xf60 [ 19.742929] ? dequeue_task_fair+0x166/0x4e0 [ 19.743082] ? __schedule+0x10cc/0x2b60 [ 19.743128] ? __pfx_read_tsc+0x10/0x10 [ 19.743164] ? ktime_get_ts64+0x86/0x230 [ 19.743204] kunit_try_run_case+0x1a5/0x480 [ 19.743245] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.743279] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 19.743344] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 19.743382] ? __kthread_parkme+0x82/0x180 [ 19.743417] ? preempt_count_sub+0x50/0x80 [ 19.743453] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.743490] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.743524] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 19.743560] kthread+0x337/0x6f0 [ 19.743586] ? trace_preempt_on+0x20/0xc0 [ 19.743623] ? __pfx_kthread+0x10/0x10 [ 19.743650] ? _raw_spin_unlock_irq+0x47/0x80 [ 19.743682] ? calculate_sigpending+0x7b/0xa0 [ 19.743715] ? __pfx_kthread+0x10/0x10 [ 19.743742] ret_from_fork+0x41/0x80 [ 19.743774] ? __pfx_kthread+0x10/0x10 [ 19.743800] ret_from_fork_asm+0x1a/0x30 [ 19.743847] </TASK> [ 19.743863] [ 19.764765] Allocated by task 208: [ 19.765795] kasan_save_stack+0x45/0x70 [ 19.766629] kasan_save_track+0x18/0x40 [ 19.766960] kasan_save_alloc_info+0x3b/0x50 [ 19.767809] __kasan_kmalloc+0xb7/0xc0 [ 19.768158] __kmalloc_cache_noprof+0x189/0x420 [ 19.769087] kmalloc_uaf2+0xc6/0x520 [ 19.769651] kunit_try_run_case+0x1a5/0x480 [ 19.770442] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.770861] kthread+0x337/0x6f0 [ 19.771503] ret_from_fork+0x41/0x80 [ 19.771892] ret_from_fork_asm+0x1a/0x30 [ 19.772431] [ 19.772646] Freed by task 208: [ 19.773137] kasan_save_stack+0x45/0x70 [ 19.773627] kasan_save_track+0x18/0x40 [ 19.774100] kasan_save_free_info+0x3f/0x60 [ 19.774596] __kasan_slab_free+0x56/0x70 [ 19.775395] kfree+0x222/0x3f0 [ 19.775797] kmalloc_uaf2+0x14c/0x520 [ 19.776175] kunit_try_run_case+0x1a5/0x480 [ 19.776618] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.777134] kthread+0x337/0x6f0 [ 19.777730] ret_from_fork+0x41/0x80 [ 19.778321] ret_from_fork_asm+0x1a/0x30 [ 19.778774] [ 19.779191] The buggy address belongs to the object at ffff8881030a1b80 [ 19.779191] which belongs to the cache kmalloc-64 of size 64 [ 19.780355] The buggy address is located 40 bytes inside of [ 19.780355] freed 64-byte region [ffff8881030a1b80, ffff8881030a1bc0) [ 19.781565] [ 19.781851] The buggy address belongs to the physical page: [ 19.782535] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1030a1 [ 19.783406] flags: 0x200000000000000(node=0|zone=2) [ 19.783863] page_type: f5(slab) [ 19.784455] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 19.785174] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.785898] page dumped because: kasan: bad access detected [ 19.786725] [ 19.787127] Memory state around the buggy address: [ 19.787574] ffff8881030a1a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.788427] ffff8881030a1b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.789229] >ffff8881030a1b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.789868] ^ [ 19.790484] ffff8881030a1c00: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 19.791281] ffff8881030a1c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.792112] ==================================================================