Date
July 10, 2025, 11:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.069655] ================================================================== [ 16.069716] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 16.069785] Read of size 1 at addr fff00000c64512a8 by task kunit_try_catch/188 [ 16.069838] [ 16.069872] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.069956] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.069981] Hardware name: linux,dummy-virt (DT) [ 16.070013] Call trace: [ 16.070034] show_stack+0x20/0x38 (C) [ 16.070095] dump_stack_lvl+0x8c/0xd0 [ 16.070144] print_report+0x118/0x608 [ 16.070192] kasan_report+0xdc/0x128 [ 16.070237] __asan_report_load1_noabort+0x20/0x30 [ 16.070290] kmalloc_uaf2+0x3f4/0x468 [ 16.070335] kunit_try_run_case+0x170/0x3f0 [ 16.070385] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.070439] kthread+0x328/0x630 [ 16.070481] ret_from_fork+0x10/0x20 [ 16.070530] [ 16.070548] Allocated by task 188: [ 16.070576] kasan_save_stack+0x3c/0x68 [ 16.070615] kasan_save_track+0x20/0x40 [ 16.070654] kasan_save_alloc_info+0x40/0x58 [ 16.070693] __kasan_kmalloc+0xd4/0xd8 [ 16.070729] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.070769] kmalloc_uaf2+0xc4/0x468 [ 16.070804] kunit_try_run_case+0x170/0x3f0 [ 16.070841] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.071113] kthread+0x328/0x630 [ 16.071151] ret_from_fork+0x10/0x20 [ 16.071342] [ 16.071361] Freed by task 188: [ 16.071390] kasan_save_stack+0x3c/0x68 [ 16.071508] kasan_save_track+0x20/0x40 [ 16.071551] kasan_save_free_info+0x4c/0x78 [ 16.071593] __kasan_slab_free+0x6c/0x98 [ 16.071631] kfree+0x214/0x3c8 [ 16.071663] kmalloc_uaf2+0x134/0x468 [ 16.071932] kunit_try_run_case+0x170/0x3f0 [ 16.072022] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.072159] kthread+0x328/0x630 [ 16.072234] ret_from_fork+0x10/0x20 [ 16.072289] [ 16.072308] The buggy address belongs to the object at fff00000c6451280 [ 16.072308] which belongs to the cache kmalloc-64 of size 64 [ 16.072528] The buggy address is located 40 bytes inside of [ 16.072528] freed 64-byte region [fff00000c6451280, fff00000c64512c0) [ 16.072598] [ 16.072619] The buggy address belongs to the physical page: [ 16.072652] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106451 [ 16.072725] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.072776] page_type: f5(slab) [ 16.072818] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.072903] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.072996] page dumped because: kasan: bad access detected [ 16.073028] [ 16.073045] Memory state around the buggy address: [ 16.073170] fff00000c6451180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.073214] fff00000c6451200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.073256] >fff00000c6451280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.073294] ^ [ 16.073326] fff00000c6451300: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 16.073368] fff00000c6451380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.073407] ==================================================================
[ 12.990092] ================================================================== [ 12.990659] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 12.990951] Read of size 1 at addr ffff888102d67fa8 by task kunit_try_catch/205 [ 12.991213] [ 12.991324] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.991375] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.991386] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.991405] Call Trace: [ 12.991416] <TASK> [ 12.991431] dump_stack_lvl+0x73/0xb0 [ 12.991460] print_report+0xd1/0x650 [ 12.991483] ? __virt_addr_valid+0x1db/0x2d0 [ 12.991506] ? kmalloc_uaf2+0x4a8/0x520 [ 12.991525] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.991548] ? kmalloc_uaf2+0x4a8/0x520 [ 12.991568] kasan_report+0x141/0x180 [ 12.991589] ? kmalloc_uaf2+0x4a8/0x520 [ 12.991613] __asan_report_load1_noabort+0x18/0x20 [ 12.991638] kmalloc_uaf2+0x4a8/0x520 [ 12.991658] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 12.991699] ? finish_task_switch.isra.0+0x153/0x700 [ 12.991740] ? __switch_to+0x47/0xf50 [ 12.991767] ? __schedule+0x10cc/0x2b60 [ 12.991791] ? __pfx_read_tsc+0x10/0x10 [ 12.991813] ? ktime_get_ts64+0x86/0x230 [ 12.991838] kunit_try_run_case+0x1a5/0x480 [ 12.991863] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.991886] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.991910] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.991933] ? __kthread_parkme+0x82/0x180 [ 12.991954] ? preempt_count_sub+0x50/0x80 [ 12.991976] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.992000] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.992024] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.992049] kthread+0x337/0x6f0 [ 12.992067] ? trace_preempt_on+0x20/0xc0 [ 12.992091] ? __pfx_kthread+0x10/0x10 [ 12.992112] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.992133] ? calculate_sigpending+0x7b/0xa0 [ 12.992157] ? __pfx_kthread+0x10/0x10 [ 12.992184] ret_from_fork+0x116/0x1d0 [ 12.992202] ? __pfx_kthread+0x10/0x10 [ 12.992222] ret_from_fork_asm+0x1a/0x30 [ 12.992266] </TASK> [ 12.992275] [ 12.999600] Allocated by task 205: [ 13.000390] kasan_save_stack+0x45/0x70 [ 13.000590] kasan_save_track+0x18/0x40 [ 13.000916] kasan_save_alloc_info+0x3b/0x50 [ 13.001073] __kasan_kmalloc+0xb7/0xc0 [ 13.001207] __kmalloc_cache_noprof+0x189/0x420 [ 13.001374] kmalloc_uaf2+0xc6/0x520 [ 13.001756] kunit_try_run_case+0x1a5/0x480 [ 13.001965] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.002200] kthread+0x337/0x6f0 [ 13.002405] ret_from_fork+0x116/0x1d0 [ 13.002599] ret_from_fork_asm+0x1a/0x30 [ 13.002763] [ 13.002857] Freed by task 205: [ 13.002996] kasan_save_stack+0x45/0x70 [ 13.003164] kasan_save_track+0x18/0x40 [ 13.003330] kasan_save_free_info+0x3f/0x60 [ 13.003485] __kasan_slab_free+0x56/0x70 [ 13.003623] kfree+0x222/0x3f0 [ 13.003894] kmalloc_uaf2+0x14c/0x520 [ 13.004080] kunit_try_run_case+0x1a5/0x480 [ 13.004289] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.004521] kthread+0x337/0x6f0 [ 13.004664] ret_from_fork+0x116/0x1d0 [ 13.004796] ret_from_fork_asm+0x1a/0x30 [ 13.004934] [ 13.005004] The buggy address belongs to the object at ffff888102d67f80 [ 13.005004] which belongs to the cache kmalloc-64 of size 64 [ 13.005673] The buggy address is located 40 bytes inside of [ 13.005673] freed 64-byte region [ffff888102d67f80, ffff888102d67fc0) [ 13.006122] [ 13.006195] The buggy address belongs to the physical page: [ 13.006375] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102d67 [ 13.007110] flags: 0x200000000000000(node=0|zone=2) [ 13.007508] page_type: f5(slab) [ 13.007641] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 13.008086] raw: 0000000000000000 0000000000200020 00000000f5000000 0000000000000000 [ 13.008440] page dumped because: kasan: bad access detected [ 13.008709] [ 13.008778] Memory state around the buggy address: [ 13.008932] ffff888102d67e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.009147] ffff888102d67f00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.009653] >ffff888102d67f80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.009932] ^ [ 13.010079] ffff888102d68000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.010304] ffff888102d68080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.010903] ==================================================================