Date
May 13, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.431588] ================================================================== [ 19.432242] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 19.432350] Read of size 1 at addr fff00000c4035108 by task kunit_try_catch/184 [ 19.432447] [ 19.432505] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT [ 19.432608] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.432735] Hardware name: linux,dummy-virt (DT) [ 19.432928] Call trace: [ 19.433088] show_stack+0x20/0x38 (C) [ 19.433239] dump_stack_lvl+0x8c/0xd0 [ 19.433450] print_report+0x118/0x608 [ 19.433517] kasan_report+0xdc/0x128 [ 19.433697] __asan_report_load1_noabort+0x20/0x30 [ 19.433770] kmalloc_uaf+0x300/0x338 [ 19.434156] kunit_try_run_case+0x170/0x3f0 [ 19.434240] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.434349] kthread+0x328/0x630 [ 19.435230] ret_from_fork+0x10/0x20 [ 19.435381] [ 19.435506] Allocated by task 184: [ 19.435609] kasan_save_stack+0x3c/0x68 [ 19.435665] kasan_save_track+0x20/0x40 [ 19.435706] kasan_save_alloc_info+0x40/0x58 [ 19.435881] __kasan_kmalloc+0xd4/0xd8 [ 19.436245] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.436359] kmalloc_uaf+0xb8/0x338 [ 19.436400] kunit_try_run_case+0x170/0x3f0 [ 19.436496] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.436543] kthread+0x328/0x630 [ 19.436795] ret_from_fork+0x10/0x20 [ 19.436935] [ 19.437046] Freed by task 184: [ 19.437353] kasan_save_stack+0x3c/0x68 [ 19.437504] kasan_save_track+0x20/0x40 [ 19.437624] kasan_save_free_info+0x4c/0x78 [ 19.437671] __kasan_slab_free+0x6c/0x98 [ 19.437710] kfree+0x214/0x3c8 [ 19.438499] kmalloc_uaf+0x11c/0x338 [ 19.438894] kunit_try_run_case+0x170/0x3f0 [ 19.438946] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.439107] kthread+0x328/0x630 [ 19.439243] ret_from_fork+0x10/0x20 [ 19.439425] [ 19.439481] The buggy address belongs to the object at fff00000c4035100 [ 19.439481] which belongs to the cache kmalloc-16 of size 16 [ 19.439747] The buggy address is located 8 bytes inside of [ 19.439747] freed 16-byte region [fff00000c4035100, fff00000c4035110) [ 19.439823] [ 19.439851] The buggy address belongs to the physical page: [ 19.439892] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104035 [ 19.439955] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.440025] page_type: f5(slab) [ 19.440125] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.440218] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.440261] page dumped because: kasan: bad access detected [ 19.440296] [ 19.440316] Memory state around the buggy address: [ 19.440351] fff00000c4035000: 00 02 fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 19.440406] fff00000c4035080: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.440554] >fff00000c4035100: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.440657] ^ [ 19.440817] fff00000c4035180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.441098] fff00000c4035200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.441147] ==================================================================
[ 11.350982] ================================================================== [ 11.352503] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 11.353294] Read of size 1 at addr ffff888101d83648 by task kunit_try_catch/201 [ 11.354009] [ 11.354211] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT(voluntary) [ 11.354259] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.354272] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.354292] Call Trace: [ 11.354473] <TASK> [ 11.354505] dump_stack_lvl+0x73/0xb0 [ 11.354549] print_report+0xd1/0x650 [ 11.354573] ? __virt_addr_valid+0x1db/0x2d0 [ 11.354595] ? kmalloc_uaf+0x320/0x380 [ 11.354624] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.354647] ? kmalloc_uaf+0x320/0x380 [ 11.354668] kasan_report+0x141/0x180 [ 11.354690] ? kmalloc_uaf+0x320/0x380 [ 11.354715] __asan_report_load1_noabort+0x18/0x20 [ 11.354736] kmalloc_uaf+0x320/0x380 [ 11.354756] ? __pfx_kmalloc_uaf+0x10/0x10 [ 11.354777] ? __schedule+0x10cc/0x2b60 [ 11.354799] ? __pfx_read_tsc+0x10/0x10 [ 11.354819] ? ktime_get_ts64+0x86/0x230 [ 11.354843] kunit_try_run_case+0x1a5/0x480 [ 11.354868] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.354889] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.354912] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.354933] ? __kthread_parkme+0x82/0x180 [ 11.354954] ? preempt_count_sub+0x50/0x80 [ 11.354978] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.355002] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.355026] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.355049] kthread+0x337/0x6f0 [ 11.355068] ? trace_preempt_on+0x20/0xc0 [ 11.355091] ? __pfx_kthread+0x10/0x10 [ 11.355112] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.355132] ? calculate_sigpending+0x7b/0xa0 [ 11.355156] ? __pfx_kthread+0x10/0x10 [ 11.355177] ret_from_fork+0x116/0x1d0 [ 11.355195] ? __pfx_kthread+0x10/0x10 [ 11.355216] ret_from_fork_asm+0x1a/0x30 [ 11.355246] </TASK> [ 11.355257] [ 11.369515] Allocated by task 201: [ 11.369837] kasan_save_stack+0x45/0x70 [ 11.369997] kasan_save_track+0x18/0x40 [ 11.370132] kasan_save_alloc_info+0x3b/0x50 [ 11.370502] __kasan_kmalloc+0xb7/0xc0 [ 11.370958] __kmalloc_cache_noprof+0x189/0x420 [ 11.371507] kmalloc_uaf+0xaa/0x380 [ 11.372050] kunit_try_run_case+0x1a5/0x480 [ 11.372418] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.372716] kthread+0x337/0x6f0 [ 11.373055] ret_from_fork+0x116/0x1d0 [ 11.373445] ret_from_fork_asm+0x1a/0x30 [ 11.373871] [ 11.373980] Freed by task 201: [ 11.374140] kasan_save_stack+0x45/0x70 [ 11.374545] kasan_save_track+0x18/0x40 [ 11.374880] kasan_save_free_info+0x3f/0x60 [ 11.375031] __kasan_slab_free+0x56/0x70 [ 11.375171] kfree+0x222/0x3f0 [ 11.375483] kmalloc_uaf+0x12c/0x380 [ 11.376054] kunit_try_run_case+0x1a5/0x480 [ 11.376530] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.377251] kthread+0x337/0x6f0 [ 11.377599] ret_from_fork+0x116/0x1d0 [ 11.377956] ret_from_fork_asm+0x1a/0x30 [ 11.378260] [ 11.378475] The buggy address belongs to the object at ffff888101d83640 [ 11.378475] which belongs to the cache kmalloc-16 of size 16 [ 11.379114] The buggy address is located 8 bytes inside of [ 11.379114] freed 16-byte region [ffff888101d83640, ffff888101d83650) [ 11.380229] [ 11.380382] The buggy address belongs to the physical page: [ 11.380733] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101d83 [ 11.380977] flags: 0x200000000000000(node=0|zone=2) [ 11.381143] page_type: f5(slab) [ 11.381282] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.381734] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.382050] page dumped because: kasan: bad access detected [ 11.382377] [ 11.382449] Memory state around the buggy address: [ 11.382750] ffff888101d83500: 00 05 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 11.383145] ffff888101d83580: 00 02 fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 11.383685] >ffff888101d83600: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 11.383930] ^ [ 11.384220] ffff888101d83680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.384503] ffff888101d83700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.384903] ==================================================================