Date
July 5, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.181461] ================================================================== [ 18.181522] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 18.181576] Read of size 1 at addr fff00000c65c50a8 by task kunit_try_catch/188 [ 18.181625] [ 18.181655] CPU: 0 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.181733] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.181760] Hardware name: linux,dummy-virt (DT) [ 18.181792] Call trace: [ 18.181812] show_stack+0x20/0x38 (C) [ 18.181859] dump_stack_lvl+0x8c/0xd0 [ 18.182204] print_report+0x118/0x608 [ 18.182274] kasan_report+0xdc/0x128 [ 18.182322] __asan_report_load1_noabort+0x20/0x30 [ 18.182734] kmalloc_uaf2+0x3f4/0x468 [ 18.182792] kunit_try_run_case+0x170/0x3f0 [ 18.183232] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.183299] kthread+0x328/0x630 [ 18.183542] ret_from_fork+0x10/0x20 [ 18.183612] [ 18.183740] Allocated by task 188: [ 18.183837] kasan_save_stack+0x3c/0x68 [ 18.183882] kasan_save_track+0x20/0x40 [ 18.183931] kasan_save_alloc_info+0x40/0x58 [ 18.184078] __kasan_kmalloc+0xd4/0xd8 [ 18.184286] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.184423] kmalloc_uaf2+0xc4/0x468 [ 18.184702] kunit_try_run_case+0x170/0x3f0 [ 18.184784] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.184862] kthread+0x328/0x630 [ 18.184898] ret_from_fork+0x10/0x20 [ 18.184934] [ 18.184953] Freed by task 188: [ 18.184980] kasan_save_stack+0x3c/0x68 [ 18.185017] kasan_save_track+0x20/0x40 [ 18.185053] kasan_save_free_info+0x4c/0x78 [ 18.185102] __kasan_slab_free+0x6c/0x98 [ 18.185139] kfree+0x214/0x3c8 [ 18.185426] kmalloc_uaf2+0x134/0x468 [ 18.185492] kunit_try_run_case+0x170/0x3f0 [ 18.185569] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.185625] kthread+0x328/0x630 [ 18.185893] ret_from_fork+0x10/0x20 [ 18.186028] [ 18.186240] The buggy address belongs to the object at fff00000c65c5080 [ 18.186240] which belongs to the cache kmalloc-64 of size 64 [ 18.186458] The buggy address is located 40 bytes inside of [ 18.186458] freed 64-byte region [fff00000c65c5080, fff00000c65c50c0) [ 18.186568] [ 18.186715] The buggy address belongs to the physical page: [ 18.186779] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065c5 [ 18.186950] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.187344] page_type: f5(slab) [ 18.187411] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.187604] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.187707] page dumped because: kasan: bad access detected [ 18.187761] [ 18.187906] Memory state around the buggy address: [ 18.187989] fff00000c65c4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.188170] fff00000c65c5000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.188242] >fff00000c65c5080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.188405] ^ [ 18.188576] fff00000c65c5100: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 18.188744] fff00000c65c5180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.188909] ==================================================================
[ 13.911647] ================================================================== [ 13.912217] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 13.912720] Read of size 1 at addr ffff8881029fb2a8 by task kunit_try_catch/206 [ 13.913060] [ 13.913263] CPU: 1 UID: 0 PID: 206 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.913340] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.913357] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.913394] Call Trace: [ 13.913409] <TASK> [ 13.913431] dump_stack_lvl+0x73/0xb0 [ 13.913471] print_report+0xd1/0x650 [ 13.913499] ? __virt_addr_valid+0x1db/0x2d0 [ 13.913529] ? kmalloc_uaf2+0x4a8/0x520 [ 13.913555] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.913584] ? kmalloc_uaf2+0x4a8/0x520 [ 13.913609] kasan_report+0x141/0x180 [ 13.913636] ? kmalloc_uaf2+0x4a8/0x520 [ 13.913665] __asan_report_load1_noabort+0x18/0x20 [ 13.913697] kmalloc_uaf2+0x4a8/0x520 [ 13.913722] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 13.913746] ? finish_task_switch.isra.0+0x153/0x700 [ 13.913776] ? __switch_to+0x47/0xf50 [ 13.913823] ? __schedule+0x10cc/0x2b60 [ 13.913850] ? __pfx_read_tsc+0x10/0x10 [ 13.913877] ? ktime_get_ts64+0x86/0x230 [ 13.913907] kunit_try_run_case+0x1a5/0x480 [ 13.913940] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.913969] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.913999] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.914029] ? __kthread_parkme+0x82/0x180 [ 13.914056] ? preempt_count_sub+0x50/0x80 [ 13.914084] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.914126] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.914164] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.914195] kthread+0x337/0x6f0 [ 13.914219] ? trace_preempt_on+0x20/0xc0 [ 13.914248] ? __pfx_kthread+0x10/0x10 [ 13.914273] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.914300] ? calculate_sigpending+0x7b/0xa0 [ 13.914332] ? __pfx_kthread+0x10/0x10 [ 13.914359] ret_from_fork+0x116/0x1d0 [ 13.914382] ? __pfx_kthread+0x10/0x10 [ 13.914407] ret_from_fork_asm+0x1a/0x30 [ 13.914445] </TASK> [ 13.914459] [ 13.924047] Allocated by task 206: [ 13.924302] kasan_save_stack+0x45/0x70 [ 13.924683] kasan_save_track+0x18/0x40 [ 13.924896] kasan_save_alloc_info+0x3b/0x50 [ 13.925120] __kasan_kmalloc+0xb7/0xc0 [ 13.925367] __kmalloc_cache_noprof+0x189/0x420 [ 13.925554] kmalloc_uaf2+0xc6/0x520 [ 13.925705] kunit_try_run_case+0x1a5/0x480 [ 13.925889] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.926204] kthread+0x337/0x6f0 [ 13.926474] ret_from_fork+0x116/0x1d0 [ 13.926705] ret_from_fork_asm+0x1a/0x30 [ 13.926956] [ 13.927077] Freed by task 206: [ 13.927325] kasan_save_stack+0x45/0x70 [ 13.927529] kasan_save_track+0x18/0x40 [ 13.927685] kasan_save_free_info+0x3f/0x60 [ 13.927939] __kasan_slab_free+0x56/0x70 [ 13.928162] kfree+0x222/0x3f0 [ 13.928467] kmalloc_uaf2+0x14c/0x520 [ 13.928666] kunit_try_run_case+0x1a5/0x480 [ 13.928884] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.929111] kthread+0x337/0x6f0 [ 13.929249] ret_from_fork+0x116/0x1d0 [ 13.929486] ret_from_fork_asm+0x1a/0x30 [ 13.929813] [ 13.929925] The buggy address belongs to the object at ffff8881029fb280 [ 13.929925] which belongs to the cache kmalloc-64 of size 64 [ 13.930525] The buggy address is located 40 bytes inside of [ 13.930525] freed 64-byte region [ffff8881029fb280, ffff8881029fb2c0) [ 13.930952] [ 13.931073] The buggy address belongs to the physical page: [ 13.931363] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029fb [ 13.931773] flags: 0x200000000000000(node=0|zone=2) [ 13.932065] page_type: f5(slab) [ 13.932291] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 13.932552] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 13.932815] page dumped because: kasan: bad access detected [ 13.933493] [ 13.933610] Memory state around the buggy address: [ 13.933892] ffff8881029fb180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.934531] ffff8881029fb200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.934874] >ffff8881029fb280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.935292] ^ [ 13.935501] ffff8881029fb300: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 13.935747] ffff8881029fb380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.936138] ==================================================================