Date
July 1, 2025, 11:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.515050] ================================================================== [ 18.515224] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 18.515344] Read of size 1 at addr fff00000c77311a8 by task kunit_try_catch/189 [ 18.515448] [ 18.515569] CPU: 1 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.515701] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.515767] Hardware name: linux,dummy-virt (DT) [ 18.515814] Call trace: [ 18.515839] show_stack+0x20/0x38 (C) [ 18.515895] dump_stack_lvl+0x8c/0xd0 [ 18.515950] print_report+0x118/0x608 [ 18.516030] kasan_report+0xdc/0x128 [ 18.516205] __asan_report_load1_noabort+0x20/0x30 [ 18.516266] kmalloc_uaf2+0x3f4/0x468 [ 18.516314] kunit_try_run_case+0x170/0x3f0 [ 18.516436] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.516587] kthread+0x328/0x630 [ 18.516658] ret_from_fork+0x10/0x20 [ 18.517001] [ 18.517076] Allocated by task 189: [ 18.517170] kasan_save_stack+0x3c/0x68 [ 18.517258] kasan_save_track+0x20/0x40 [ 18.517349] kasan_save_alloc_info+0x40/0x58 [ 18.517424] __kasan_kmalloc+0xd4/0xd8 [ 18.517500] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.517635] kmalloc_uaf2+0xc4/0x468 [ 18.517720] kunit_try_run_case+0x170/0x3f0 [ 18.517843] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.517961] kthread+0x328/0x630 [ 18.518090] ret_from_fork+0x10/0x20 [ 18.518242] [ 18.518329] Freed by task 189: [ 18.518359] kasan_save_stack+0x3c/0x68 [ 18.518399] kasan_save_track+0x20/0x40 [ 18.518570] kasan_save_free_info+0x4c/0x78 [ 18.518841] __kasan_slab_free+0x6c/0x98 [ 18.518932] kfree+0x214/0x3c8 [ 18.519011] kmalloc_uaf2+0x134/0x468 [ 18.519104] kunit_try_run_case+0x170/0x3f0 [ 18.519537] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.519639] kthread+0x328/0x630 [ 18.519733] ret_from_fork+0x10/0x20 [ 18.519844] [ 18.519906] The buggy address belongs to the object at fff00000c7731180 [ 18.519906] which belongs to the cache kmalloc-64 of size 64 [ 18.520029] The buggy address is located 40 bytes inside of [ 18.520029] freed 64-byte region [fff00000c7731180, fff00000c77311c0) [ 18.520192] [ 18.520301] The buggy address belongs to the physical page: [ 18.520340] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107731 [ 18.520403] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.520859] page_type: f5(slab) [ 18.520953] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.521196] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.521245] page dumped because: kasan: bad access detected [ 18.521281] [ 18.521306] Memory state around the buggy address: [ 18.521432] fff00000c7731080: 00 00 00 00 02 fc fc fc fc fc fc fc fc fc fc fc [ 18.521526] fff00000c7731100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.521629] >fff00000c7731180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.521694] ^ [ 18.521750] fff00000c7731200: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 18.521827] fff00000c7731280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.521872] ==================================================================
[ 11.792470] ================================================================== [ 11.793272] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 11.793620] Read of size 1 at addr ffff888102f040a8 by task kunit_try_catch/205 [ 11.793900] [ 11.794016] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.794065] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.794077] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.794100] Call Trace: [ 11.794114] <TASK> [ 11.794136] dump_stack_lvl+0x73/0xb0 [ 11.794231] print_report+0xd1/0x650 [ 11.794258] ? __virt_addr_valid+0x1db/0x2d0 [ 11.794283] ? kmalloc_uaf2+0x4a8/0x520 [ 11.794301] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.794322] ? kmalloc_uaf2+0x4a8/0x520 [ 11.794341] kasan_report+0x141/0x180 [ 11.794361] ? kmalloc_uaf2+0x4a8/0x520 [ 11.794397] __asan_report_load1_noabort+0x18/0x20 [ 11.794420] kmalloc_uaf2+0x4a8/0x520 [ 11.794440] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.794459] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 11.794488] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.794511] kunit_try_run_case+0x1a5/0x480 [ 11.794536] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.794556] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.794579] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.794601] ? __kthread_parkme+0x82/0x180 [ 11.794622] ? preempt_count_sub+0x50/0x80 [ 11.794646] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.794668] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.794689] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.794710] kthread+0x337/0x6f0 [ 11.794729] ? trace_preempt_on+0x20/0xc0 [ 11.794752] ? __pfx_kthread+0x10/0x10 [ 11.794771] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.794790] ? calculate_sigpending+0x7b/0xa0 [ 11.794814] ? __pfx_kthread+0x10/0x10 [ 11.794834] ret_from_fork+0x116/0x1d0 [ 11.794852] ? __pfx_kthread+0x10/0x10 [ 11.794871] ret_from_fork_asm+0x1a/0x30 [ 11.794901] </TASK> [ 11.794913] [ 11.802549] Allocated by task 205: [ 11.802717] kasan_save_stack+0x45/0x70 [ 11.803128] kasan_save_track+0x18/0x40 [ 11.803291] kasan_save_alloc_info+0x3b/0x50 [ 11.803454] __kasan_kmalloc+0xb7/0xc0 [ 11.803657] __kmalloc_cache_noprof+0x189/0x420 [ 11.803881] kmalloc_uaf2+0xc6/0x520 [ 11.804263] kunit_try_run_case+0x1a5/0x480 [ 11.804466] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.804693] kthread+0x337/0x6f0 [ 11.804818] ret_from_fork+0x116/0x1d0 [ 11.804964] ret_from_fork_asm+0x1a/0x30 [ 11.805163] [ 11.805263] Freed by task 205: [ 11.805432] kasan_save_stack+0x45/0x70 [ 11.805679] kasan_save_track+0x18/0x40 [ 11.805838] kasan_save_free_info+0x3f/0x60 [ 11.805982] __kasan_slab_free+0x56/0x70 [ 11.806118] kfree+0x222/0x3f0 [ 11.806233] kmalloc_uaf2+0x14c/0x520 [ 11.806465] kunit_try_run_case+0x1a5/0x480 [ 11.806671] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.806919] kthread+0x337/0x6f0 [ 11.807089] ret_from_fork+0x116/0x1d0 [ 11.807616] ret_from_fork_asm+0x1a/0x30 [ 11.807845] [ 11.807992] The buggy address belongs to the object at ffff888102f04080 [ 11.807992] which belongs to the cache kmalloc-64 of size 64 [ 11.808481] The buggy address is located 40 bytes inside of [ 11.808481] freed 64-byte region [ffff888102f04080, ffff888102f040c0) [ 11.808900] [ 11.808976] The buggy address belongs to the physical page: [ 11.809216] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f04 [ 11.809588] flags: 0x200000000000000(node=0|zone=2) [ 11.809931] page_type: f5(slab) [ 11.810132] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.810410] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.810738] page dumped because: kasan: bad access detected [ 11.811188] [ 11.811285] Memory state around the buggy address: [ 11.811504] ffff888102f03f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.811740] ffff888102f04000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.812063] >ffff888102f04080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.812348] ^ [ 11.813056] ffff888102f04100: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 11.813289] ffff888102f04180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.814335] ==================================================================