Date
June 23, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.173832] ================================================================== [ 33.173902] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 33.173968] Write of size 33 at addr fff00000c570b600 by task kunit_try_catch/198 [ 33.174056] [ 33.174125] CPU: 1 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT [ 33.174339] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.174404] Hardware name: linux,dummy-virt (DT) [ 33.174475] Call trace: [ 33.174530] show_stack+0x20/0x38 (C) [ 33.174762] dump_stack_lvl+0x8c/0xd0 [ 33.175154] print_report+0x118/0x608 [ 33.175286] kasan_report+0xdc/0x128 [ 33.175411] kasan_check_range+0x100/0x1a8 [ 33.175697] __asan_memset+0x34/0x78 [ 33.175851] kmalloc_uaf_memset+0x170/0x310 [ 33.176105] kunit_try_run_case+0x170/0x3f0 [ 33.176265] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.176398] kthread+0x328/0x630 [ 33.176502] ret_from_fork+0x10/0x20 [ 33.176616] [ 33.176662] Allocated by task 198: [ 33.176738] kasan_save_stack+0x3c/0x68 [ 33.177010] kasan_save_track+0x20/0x40 [ 33.177134] kasan_save_alloc_info+0x40/0x58 [ 33.177624] __kasan_kmalloc+0xd4/0xd8 [ 33.178051] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.178248] kmalloc_uaf_memset+0xb8/0x310 [ 33.178347] kunit_try_run_case+0x170/0x3f0 [ 33.178446] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.178596] kthread+0x328/0x630 [ 33.178787] ret_from_fork+0x10/0x20 [ 33.178969] [ 33.179021] Freed by task 198: [ 33.179107] kasan_save_stack+0x3c/0x68 [ 33.179222] kasan_save_track+0x20/0x40 [ 33.179395] kasan_save_free_info+0x4c/0x78 [ 33.179500] __kasan_slab_free+0x6c/0x98 [ 33.179805] kfree+0x214/0x3c8 [ 33.179937] kmalloc_uaf_memset+0x11c/0x310 [ 33.180106] kunit_try_run_case+0x170/0x3f0 [ 33.180381] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.180567] kthread+0x328/0x630 [ 33.180689] ret_from_fork+0x10/0x20 [ 33.180802] [ 33.180916] The buggy address belongs to the object at fff00000c570b600 [ 33.180916] which belongs to the cache kmalloc-64 of size 64 [ 33.181130] The buggy address is located 0 bytes inside of [ 33.181130] freed 64-byte region [fff00000c570b600, fff00000c570b640) [ 33.181378] [ 33.181436] The buggy address belongs to the physical page: [ 33.181507] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10570b [ 33.181651] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.181837] page_type: f5(slab) [ 33.181976] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 33.182118] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 33.182226] page dumped because: kasan: bad access detected [ 33.182309] [ 33.182351] Memory state around the buggy address: [ 33.182423] fff00000c570b500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.182522] fff00000c570b580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.183121] >fff00000c570b600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.183364] ^ [ 33.183440] fff00000c570b680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.183585] fff00000c570b700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.183720] ==================================================================
[ 22.070659] ================================================================== [ 22.071056] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 22.071501] Write of size 33 at addr ffff888102c0a000 by task kunit_try_catch/215 [ 22.071892] [ 22.072005] CPU: 1 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT(voluntary) [ 22.072119] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.072138] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.072164] Call Trace: [ 22.072184] <TASK> [ 22.072207] dump_stack_lvl+0x73/0xb0 [ 22.072252] print_report+0xd1/0x650 [ 22.072287] ? __virt_addr_valid+0x1db/0x2d0 [ 22.072325] ? kmalloc_uaf_memset+0x1a3/0x360 [ 22.072357] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.072413] ? kmalloc_uaf_memset+0x1a3/0x360 [ 22.072449] kasan_report+0x141/0x180 [ 22.072487] ? kmalloc_uaf_memset+0x1a3/0x360 [ 22.072526] kasan_check_range+0x10c/0x1c0 [ 22.072556] __asan_memset+0x27/0x50 [ 22.072587] kmalloc_uaf_memset+0x1a3/0x360 [ 22.072619] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 22.072654] ? __schedule+0x10cc/0x2b60 [ 22.072692] ? __pfx_read_tsc+0x10/0x10 [ 22.072727] ? ktime_get_ts64+0x86/0x230 [ 22.072771] kunit_try_run_case+0x1a5/0x480 [ 22.072801] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.072819] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.073058] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.073117] ? __kthread_parkme+0x82/0x180 [ 22.073185] ? preempt_count_sub+0x50/0x80 [ 22.073550] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.073596] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.073640] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.073680] kthread+0x337/0x6f0 [ 22.073701] ? trace_preempt_on+0x20/0xc0 [ 22.073721] ? __pfx_kthread+0x10/0x10 [ 22.073738] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.073756] ? calculate_sigpending+0x7b/0xa0 [ 22.073775] ? __pfx_kthread+0x10/0x10 [ 22.073794] ret_from_fork+0x116/0x1d0 [ 22.073810] ? __pfx_kthread+0x10/0x10 [ 22.073827] ret_from_fork_asm+0x1a/0x30 [ 22.073864] </TASK> [ 22.073875] [ 22.084734] Allocated by task 215: [ 22.085057] kasan_save_stack+0x45/0x70 [ 22.085540] kasan_save_track+0x18/0x40 [ 22.085824] kasan_save_alloc_info+0x3b/0x50 [ 22.086420] __kasan_kmalloc+0xb7/0xc0 [ 22.086791] __kmalloc_cache_noprof+0x189/0x420 [ 22.087293] kmalloc_uaf_memset+0xa9/0x360 [ 22.087447] kunit_try_run_case+0x1a5/0x480 [ 22.087761] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.088340] kthread+0x337/0x6f0 [ 22.088504] ret_from_fork+0x116/0x1d0 [ 22.088818] ret_from_fork_asm+0x1a/0x30 [ 22.089159] [ 22.089247] Freed by task 215: [ 22.089409] kasan_save_stack+0x45/0x70 [ 22.089677] kasan_save_track+0x18/0x40 [ 22.089956] kasan_save_free_info+0x3f/0x60 [ 22.090282] __kasan_slab_free+0x56/0x70 [ 22.090575] kfree+0x222/0x3f0 [ 22.090793] kmalloc_uaf_memset+0x12b/0x360 [ 22.091092] kunit_try_run_case+0x1a5/0x480 [ 22.091343] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.091714] kthread+0x337/0x6f0 [ 22.091887] ret_from_fork+0x116/0x1d0 [ 22.092031] ret_from_fork_asm+0x1a/0x30 [ 22.092355] [ 22.092511] The buggy address belongs to the object at ffff888102c0a000 [ 22.092511] which belongs to the cache kmalloc-64 of size 64 [ 22.093446] The buggy address is located 0 bytes inside of [ 22.093446] freed 64-byte region [ffff888102c0a000, ffff888102c0a040) [ 22.094335] [ 22.094469] The buggy address belongs to the physical page: [ 22.094663] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102c0a [ 22.094952] flags: 0x200000000000000(node=0|zone=2) [ 22.095310] page_type: f5(slab) [ 22.095576] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 22.096395] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 22.096920] page dumped because: kasan: bad access detected [ 22.097588] [ 22.097710] Memory state around the buggy address: [ 22.097899] ffff888102c09f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.098826] ffff888102c09f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.099268] >ffff888102c0a000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.099572] ^ [ 22.099697] ffff888102c0a080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.100259] ffff888102c0a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.100560] ==================================================================