Date
July 15, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.034739] ================================================================== [ 18.034803] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 18.034858] Write of size 33 at addr fff00000c59d5e80 by task kunit_try_catch/188 [ 18.035170] [ 18.035233] CPU: 0 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT [ 18.035318] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.035346] Hardware name: linux,dummy-virt (DT) [ 18.035387] Call trace: [ 18.035410] show_stack+0x20/0x38 (C) [ 18.035473] dump_stack_lvl+0x8c/0xd0 [ 18.035523] print_report+0x118/0x5d0 [ 18.035568] kasan_report+0xdc/0x128 [ 18.035611] kasan_check_range+0x100/0x1a8 [ 18.035667] __asan_memset+0x34/0x78 [ 18.035724] kmalloc_uaf_memset+0x170/0x310 [ 18.035774] kunit_try_run_case+0x170/0x3f0 [ 18.035832] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.035899] kthread+0x328/0x630 [ 18.035944] ret_from_fork+0x10/0x20 [ 18.035993] [ 18.036011] Allocated by task 188: [ 18.036039] kasan_save_stack+0x3c/0x68 [ 18.036085] kasan_save_track+0x20/0x40 [ 18.036123] kasan_save_alloc_info+0x40/0x58 [ 18.036161] __kasan_kmalloc+0xd4/0xd8 [ 18.036196] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.037239] kmalloc_uaf_memset+0xb8/0x310 [ 18.037286] kunit_try_run_case+0x170/0x3f0 [ 18.037339] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.037756] kthread+0x328/0x630 [ 18.037824] ret_from_fork+0x10/0x20 [ 18.038020] [ 18.038146] Freed by task 188: [ 18.038185] kasan_save_stack+0x3c/0x68 [ 18.038234] kasan_save_track+0x20/0x40 [ 18.038289] kasan_save_free_info+0x4c/0x78 [ 18.038327] __kasan_slab_free+0x6c/0x98 [ 18.038636] kfree+0x214/0x3c8 [ 18.038946] kmalloc_uaf_memset+0x11c/0x310 [ 18.039062] kunit_try_run_case+0x170/0x3f0 [ 18.039234] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.039331] kthread+0x328/0x630 [ 18.039415] ret_from_fork+0x10/0x20 [ 18.039577] [ 18.039917] The buggy address belongs to the object at fff00000c59d5e80 [ 18.039917] which belongs to the cache kmalloc-64 of size 64 [ 18.040036] The buggy address is located 0 bytes inside of [ 18.040036] freed 64-byte region [fff00000c59d5e80, fff00000c59d5ec0) [ 18.040239] [ 18.040373] The buggy address belongs to the physical page: [ 18.040453] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059d5 [ 18.040611] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.040664] page_type: f5(slab) [ 18.040703] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.040822] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.041247] page dumped because: kasan: bad access detected [ 18.041356] [ 18.041453] Memory state around the buggy address: [ 18.041562] fff00000c59d5d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.041998] fff00000c59d5e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.042126] >fff00000c59d5e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.042266] ^ [ 18.042371] fff00000c59d5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.042448] fff00000c59d5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.042607] ==================================================================
[ 11.273510] ================================================================== [ 11.274193] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.274528] Write of size 33 at addr ffff888102f39280 by task kunit_try_catch/205 [ 11.274890] [ 11.274994] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT(voluntary) [ 11.275038] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.275050] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.275070] Call Trace: [ 11.275083] <TASK> [ 11.275100] dump_stack_lvl+0x73/0xb0 [ 11.275126] print_report+0xd1/0x610 [ 11.275148] ? __virt_addr_valid+0x1db/0x2d0 [ 11.275169] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.275189] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.275211] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.275232] kasan_report+0x141/0x180 [ 11.275253] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.275279] kasan_check_range+0x10c/0x1c0 [ 11.275298] __asan_memset+0x27/0x50 [ 11.275317] kmalloc_uaf_memset+0x1a3/0x360 [ 11.275337] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.275359] ? __schedule+0x10cc/0x2b60 [ 11.275381] ? __pfx_read_tsc+0x10/0x10 [ 11.275401] ? ktime_get_ts64+0x86/0x230 [ 11.275427] kunit_try_run_case+0x1a5/0x480 [ 11.275447] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.275465] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.275487] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.275510] ? __kthread_parkme+0x82/0x180 [ 11.275531] ? preempt_count_sub+0x50/0x80 [ 11.275555] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.275575] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.275596] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.275618] kthread+0x337/0x6f0 [ 11.275634] ? trace_preempt_on+0x20/0xc0 [ 11.275656] ? __pfx_kthread+0x10/0x10 [ 11.275673] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.275694] ? calculate_sigpending+0x7b/0xa0 [ 11.275714] ? __pfx_kthread+0x10/0x10 [ 11.275732] ret_from_fork+0x41/0x80 [ 11.275751] ? __pfx_kthread+0x10/0x10 [ 11.275768] ret_from_fork_asm+0x1a/0x30 [ 11.275798] </TASK> [ 11.275808] [ 11.283396] Allocated by task 205: [ 11.283528] kasan_save_stack+0x45/0x70 [ 11.283693] kasan_save_track+0x18/0x40 [ 11.283971] kasan_save_alloc_info+0x3b/0x50 [ 11.284333] __kasan_kmalloc+0xb7/0xc0 [ 11.284489] __kmalloc_cache_noprof+0x189/0x420 [ 11.284643] kmalloc_uaf_memset+0xa9/0x360 [ 11.284784] kunit_try_run_case+0x1a5/0x480 [ 11.285178] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.285437] kthread+0x337/0x6f0 [ 11.285608] ret_from_fork+0x41/0x80 [ 11.285788] ret_from_fork_asm+0x1a/0x30 [ 11.285994] [ 11.286265] Freed by task 205: [ 11.286430] kasan_save_stack+0x45/0x70 [ 11.286620] kasan_save_track+0x18/0x40 [ 11.286943] kasan_save_free_info+0x3f/0x60 [ 11.287088] __kasan_slab_free+0x56/0x70 [ 11.287224] kfree+0x222/0x3f0 [ 11.287364] kmalloc_uaf_memset+0x12b/0x360 [ 11.287567] kunit_try_run_case+0x1a5/0x480 [ 11.287771] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.288207] kthread+0x337/0x6f0 [ 11.288327] ret_from_fork+0x41/0x80 [ 11.288454] ret_from_fork_asm+0x1a/0x30 [ 11.288589] [ 11.288657] The buggy address belongs to the object at ffff888102f39280 [ 11.288657] which belongs to the cache kmalloc-64 of size 64 [ 11.289336] The buggy address is located 0 bytes inside of [ 11.289336] freed 64-byte region [ffff888102f39280, ffff888102f392c0) [ 11.290174] [ 11.290279] The buggy address belongs to the physical page: [ 11.290494] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f39 [ 11.290791] flags: 0x200000000000000(node=0|zone=2) [ 11.291122] page_type: f5(slab) [ 11.291405] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.291710] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.292085] page dumped because: kasan: bad access detected [ 11.292256] [ 11.292322] Memory state around the buggy address: [ 11.292534] ffff888102f39180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.292900] ffff888102f39200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.293275] >ffff888102f39280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.293531] ^ [ 11.293687] ffff888102f39300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.294011] ffff888102f39380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.294279] ==================================================================