Date
June 19, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 30.771201] ================================================================== [ 30.771392] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 30.771542] Read of size 1 at addr fff00000c7738528 by task kunit_try_catch/199 [ 30.771668] [ 30.771760] CPU: 1 UID: 0 PID: 199 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT [ 30.771992] Tainted: [B]=BAD_PAGE, [N]=TEST [ 30.772059] Hardware name: linux,dummy-virt (DT) [ 30.772143] Call trace: [ 30.772199] show_stack+0x20/0x38 (C) [ 30.772327] dump_stack_lvl+0x8c/0xd0 [ 30.772452] print_report+0x118/0x608 [ 30.772567] kasan_report+0xdc/0x128 [ 30.772680] __asan_report_load1_noabort+0x20/0x30 [ 30.772810] kmalloc_uaf2+0x3f4/0x468 [ 30.772940] kunit_try_run_case+0x170/0x3f0 [ 30.773056] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.773241] kthread+0x328/0x630 [ 30.773333] ret_from_fork+0x10/0x20 [ 30.773464] [ 30.773504] Allocated by task 199: [ 30.773569] kasan_save_stack+0x3c/0x68 [ 30.773667] kasan_save_track+0x20/0x40 [ 30.773763] kasan_save_alloc_info+0x40/0x58 [ 30.773865] __kasan_kmalloc+0xd4/0xd8 [ 30.773960] __kmalloc_cache_noprof+0x16c/0x3c0 [ 30.774106] kmalloc_uaf2+0xc4/0x468 [ 30.774196] kunit_try_run_case+0x170/0x3f0 [ 30.774292] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.774395] kthread+0x328/0x630 [ 30.774477] ret_from_fork+0x10/0x20 [ 30.774566] [ 30.774612] Freed by task 199: [ 30.774681] kasan_save_stack+0x3c/0x68 [ 30.774775] kasan_save_track+0x20/0x40 [ 30.774849] kasan_save_free_info+0x4c/0x78 [ 30.774958] __kasan_slab_free+0x6c/0x98 [ 30.775051] kfree+0x214/0x3c8 [ 30.775133] kmalloc_uaf2+0x134/0x468 [ 30.775207] kunit_try_run_case+0x170/0x3f0 [ 30.775326] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.775428] kthread+0x328/0x630 [ 30.775502] ret_from_fork+0x10/0x20 [ 30.775588] [ 30.775632] The buggy address belongs to the object at fff00000c7738500 [ 30.775632] which belongs to the cache kmalloc-64 of size 64 [ 30.775793] The buggy address is located 40 bytes inside of [ 30.775793] freed 64-byte region [fff00000c7738500, fff00000c7738540) [ 30.775942] [ 30.775990] The buggy address belongs to the physical page: [ 30.776075] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107738 [ 30.776233] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 30.776394] page_type: f5(slab) [ 30.776499] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 30.776621] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 30.776713] page dumped because: kasan: bad access detected [ 30.776791] [ 30.776835] Memory state around the buggy address: [ 30.776930] fff00000c7738400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.777040] fff00000c7738480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.777146] >fff00000c7738500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.777237] ^ [ 30.777315] fff00000c7738580: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 30.777423] fff00000c7738600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.777522] ==================================================================
[ 27.294117] ================================================================== [ 27.294700] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 27.295535] Read of size 1 at addr ffff888103257a28 by task kunit_try_catch/217 [ 27.296292] [ 27.296799] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT(voluntary) [ 27.296887] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.296903] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.296931] Call Trace: [ 27.296951] <TASK> [ 27.296975] dump_stack_lvl+0x73/0xb0 [ 27.297023] print_report+0xd1/0x650 [ 27.297050] ? __virt_addr_valid+0x1db/0x2d0 [ 27.297076] ? kmalloc_uaf2+0x4a8/0x520 [ 27.297097] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.297279] ? kmalloc_uaf2+0x4a8/0x520 [ 27.297303] kasan_report+0x141/0x180 [ 27.297328] ? kmalloc_uaf2+0x4a8/0x520 [ 27.297354] __asan_report_load1_noabort+0x18/0x20 [ 27.297381] kmalloc_uaf2+0x4a8/0x520 [ 27.297403] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 27.297425] ? finish_task_switch.isra.0+0x153/0x700 [ 27.297451] ? __switch_to+0x47/0xf50 [ 27.297480] ? __schedule+0x10cc/0x2b60 [ 27.297505] ? __pfx_read_tsc+0x10/0x10 [ 27.297529] ? ktime_get_ts64+0x86/0x230 [ 27.297557] kunit_try_run_case+0x1a5/0x480 [ 27.297586] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.297610] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.297636] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.297661] ? __kthread_parkme+0x82/0x180 [ 27.297684] ? preempt_count_sub+0x50/0x80 [ 27.297708] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.297734] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.297759] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.297783] kthread+0x337/0x6f0 [ 27.297804] ? trace_preempt_on+0x20/0xc0 [ 27.297830] ? __pfx_kthread+0x10/0x10 [ 27.297852] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.297875] ? calculate_sigpending+0x7b/0xa0 [ 27.297902] ? __pfx_kthread+0x10/0x10 [ 27.297925] ret_from_fork+0x116/0x1d0 [ 27.297946] ? __pfx_kthread+0x10/0x10 [ 27.298147] ret_from_fork_asm+0x1a/0x30 [ 27.298182] </TASK> [ 27.298196] [ 27.310625] Allocated by task 217: [ 27.311182] kasan_save_stack+0x45/0x70 [ 27.311559] kasan_save_track+0x18/0x40 [ 27.311827] kasan_save_alloc_info+0x3b/0x50 [ 27.312616] __kasan_kmalloc+0xb7/0xc0 [ 27.312804] __kmalloc_cache_noprof+0x189/0x420 [ 27.313207] kmalloc_uaf2+0xc6/0x520 [ 27.313374] kunit_try_run_case+0x1a5/0x480 [ 27.314249] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.314678] kthread+0x337/0x6f0 [ 27.314916] ret_from_fork+0x116/0x1d0 [ 27.315278] ret_from_fork_asm+0x1a/0x30 [ 27.315491] [ 27.315594] Freed by task 217: [ 27.315730] kasan_save_stack+0x45/0x70 [ 27.315921] kasan_save_track+0x18/0x40 [ 27.316261] kasan_save_free_info+0x3f/0x60 [ 27.316611] __kasan_slab_free+0x56/0x70 [ 27.316852] kfree+0x222/0x3f0 [ 27.317010] kmalloc_uaf2+0x14c/0x520 [ 27.317526] kunit_try_run_case+0x1a5/0x480 [ 27.317936] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.318530] kthread+0x337/0x6f0 [ 27.318845] ret_from_fork+0x116/0x1d0 [ 27.319354] ret_from_fork_asm+0x1a/0x30 [ 27.319692] [ 27.319796] The buggy address belongs to the object at ffff888103257a00 [ 27.319796] which belongs to the cache kmalloc-64 of size 64 [ 27.320950] The buggy address is located 40 bytes inside of [ 27.320950] freed 64-byte region [ffff888103257a00, ffff888103257a40) [ 27.321867] [ 27.321997] The buggy address belongs to the physical page: [ 27.322421] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103257 [ 27.322854] flags: 0x200000000000000(node=0|zone=2) [ 27.323139] page_type: f5(slab) [ 27.323314] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 27.323848] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 27.324257] page dumped because: kasan: bad access detected [ 27.324656] [ 27.324792] Memory state around the buggy address: [ 27.325483] ffff888103257900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.325800] ffff888103257980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.326335] >ffff888103257a00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.326631] ^ [ 27.327120] ffff888103257a80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 27.327419] ffff888103257b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.327944] ==================================================================