Date
June 16, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.524850] ================================================================== [ 19.525067] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 19.525285] Read of size 1 at addr fff00000c640bfa8 by task kunit_try_catch/197 [ 19.525461] [ 19.525553] CPU: 0 UID: 0 PID: 197 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT [ 19.525755] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.525825] Hardware name: linux,dummy-virt (DT) [ 19.525925] Call trace: [ 19.526359] show_stack+0x20/0x38 (C) [ 19.526698] dump_stack_lvl+0x8c/0xd0 [ 19.526855] print_report+0x118/0x608 [ 19.527050] kasan_report+0xdc/0x128 [ 19.527279] __asan_report_load1_noabort+0x20/0x30 [ 19.527508] kmalloc_uaf2+0x3f4/0x468 [ 19.527724] kunit_try_run_case+0x170/0x3f0 [ 19.528165] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.528437] kthread+0x328/0x630 [ 19.528586] ret_from_fork+0x10/0x20 [ 19.528716] [ 19.528769] Allocated by task 197: [ 19.528853] kasan_save_stack+0x3c/0x68 [ 19.528962] kasan_save_track+0x20/0x40 [ 19.529063] kasan_save_alloc_info+0x40/0x58 [ 19.529169] __kasan_kmalloc+0xd4/0xd8 [ 19.529260] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.529362] kmalloc_uaf2+0xc4/0x468 [ 19.529448] kunit_try_run_case+0x170/0x3f0 [ 19.529862] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.530076] kthread+0x328/0x630 [ 19.530175] ret_from_fork+0x10/0x20 [ 19.530266] [ 19.530368] Freed by task 197: [ 19.530471] kasan_save_stack+0x3c/0x68 [ 19.530669] kasan_save_track+0x20/0x40 [ 19.531006] kasan_save_free_info+0x4c/0x78 [ 19.531190] __kasan_slab_free+0x6c/0x98 [ 19.531309] kfree+0x214/0x3c8 [ 19.531397] kmalloc_uaf2+0x134/0x468 [ 19.531493] kunit_try_run_case+0x170/0x3f0 [ 19.531591] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.532192] kthread+0x328/0x630 [ 19.532415] ret_from_fork+0x10/0x20 [ 19.532748] [ 19.532805] The buggy address belongs to the object at fff00000c640bf80 [ 19.532805] which belongs to the cache kmalloc-64 of size 64 [ 19.533106] The buggy address is located 40 bytes inside of [ 19.533106] freed 64-byte region [fff00000c640bf80, fff00000c640bfc0) [ 19.533384] [ 19.533438] The buggy address belongs to the physical page: [ 19.533515] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10640b [ 19.533642] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.534160] page_type: f5(slab) [ 19.534382] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.534842] raw: 0000000000000000 0000000000200020 00000000f5000000 0000000000000000 [ 19.535058] page dumped because: kasan: bad access detected [ 19.535199] [ 19.535320] Memory state around the buggy address: [ 19.535413] fff00000c640be80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.535547] fff00000c640bf00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.535665] >fff00000c640bf80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.535773] ^ [ 19.535865] fff00000c640c000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.535973] fff00000c640c080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.536075] ==================================================================
[ 11.753564] ================================================================== [ 11.753965] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 11.754184] Read of size 1 at addr ffff8881028c9728 by task kunit_try_catch/213 [ 11.754400] [ 11.754592] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT(voluntary) [ 11.754637] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.754648] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.754668] Call Trace: [ 11.754679] <TASK> [ 11.754696] dump_stack_lvl+0x73/0xb0 [ 11.754725] print_report+0xd1/0x650 [ 11.754748] ? __virt_addr_valid+0x1db/0x2d0 [ 11.754771] ? kmalloc_uaf2+0x4a8/0x520 [ 11.754790] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.754811] ? kmalloc_uaf2+0x4a8/0x520 [ 11.754830] kasan_report+0x141/0x180 [ 11.754851] ? kmalloc_uaf2+0x4a8/0x520 [ 11.754875] __asan_report_load1_noabort+0x18/0x20 [ 11.754898] kmalloc_uaf2+0x4a8/0x520 [ 11.754917] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.754946] ? finish_task_switch.isra.0+0x153/0x700 [ 11.754968] ? __switch_to+0x47/0xf50 [ 11.754994] ? __schedule+0x10cc/0x2b60 [ 11.755016] ? __pfx_read_tsc+0x10/0x10 [ 11.755037] ? ktime_get_ts64+0x86/0x230 [ 11.755062] kunit_try_run_case+0x1a5/0x480 [ 11.755087] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.755107] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.755128] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.755150] ? __kthread_parkme+0x82/0x180 [ 11.755170] ? preempt_count_sub+0x50/0x80 [ 11.755192] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.755214] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.755236] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.755257] kthread+0x337/0x6f0 [ 11.755276] ? trace_preempt_on+0x20/0xc0 [ 11.755299] ? __pfx_kthread+0x10/0x10 [ 11.755319] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.755338] ? calculate_sigpending+0x7b/0xa0 [ 11.755362] ? __pfx_kthread+0x10/0x10 [ 11.755383] ret_from_fork+0x116/0x1d0 [ 11.755400] ? __pfx_kthread+0x10/0x10 [ 11.755420] ret_from_fork_asm+0x1a/0x30 [ 11.755450] </TASK> [ 11.755460] [ 11.770525] Allocated by task 213: [ 11.770953] kasan_save_stack+0x45/0x70 [ 11.771321] kasan_save_track+0x18/0x40 [ 11.771717] kasan_save_alloc_info+0x3b/0x50 [ 11.772085] __kasan_kmalloc+0xb7/0xc0 [ 11.772214] __kmalloc_cache_noprof+0x189/0x420 [ 11.772364] kmalloc_uaf2+0xc6/0x520 [ 11.773026] kunit_try_run_case+0x1a5/0x480 [ 11.773426] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.773998] kthread+0x337/0x6f0 [ 11.774320] ret_from_fork+0x116/0x1d0 [ 11.774647] ret_from_fork_asm+0x1a/0x30 [ 11.774787] [ 11.774852] Freed by task 213: [ 11.774974] kasan_save_stack+0x45/0x70 [ 11.775108] kasan_save_track+0x18/0x40 [ 11.775236] kasan_save_free_info+0x3f/0x60 [ 11.775372] __kasan_slab_free+0x56/0x70 [ 11.776089] kfree+0x222/0x3f0 [ 11.776397] kmalloc_uaf2+0x14c/0x520 [ 11.776735] kunit_try_run_case+0x1a5/0x480 [ 11.777281] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.777885] kthread+0x337/0x6f0 [ 11.778198] ret_from_fork+0x116/0x1d0 [ 11.778615] ret_from_fork_asm+0x1a/0x30 [ 11.778992] [ 11.779154] The buggy address belongs to the object at ffff8881028c9700 [ 11.779154] which belongs to the cache kmalloc-64 of size 64 [ 11.780265] The buggy address is located 40 bytes inside of [ 11.780265] freed 64-byte region [ffff8881028c9700, ffff8881028c9740) [ 11.780949] [ 11.781028] The buggy address belongs to the physical page: [ 11.781196] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1028c9 [ 11.781551] flags: 0x200000000000000(node=0|zone=2) [ 11.782001] page_type: f5(slab) [ 11.782283] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.783133] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.783995] page dumped because: kasan: bad access detected [ 11.784754] [ 11.784918] Memory state around the buggy address: [ 11.785270] ffff8881028c9600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.785743] ffff8881028c9680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.786288] >ffff8881028c9700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.786595] ^ [ 11.787013] ffff8881028c9780: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 11.787720] ffff8881028c9800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.788264] ==================================================================