Date
July 5, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.034912] ================================================================== [ 18.034969] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 18.035085] Read of size 16 at addr fff00000c59fcbe0 by task kunit_try_catch/168 [ 18.035133] [ 18.035176] CPU: 0 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.035371] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.035477] Hardware name: linux,dummy-virt (DT) [ 18.035527] Call trace: [ 18.035555] show_stack+0x20/0x38 (C) [ 18.035606] dump_stack_lvl+0x8c/0xd0 [ 18.035653] print_report+0x118/0x608 [ 18.035753] kasan_report+0xdc/0x128 [ 18.035919] __asan_report_load16_noabort+0x20/0x30 [ 18.036144] kmalloc_uaf_16+0x3bc/0x438 [ 18.036248] kunit_try_run_case+0x170/0x3f0 [ 18.036297] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.036347] kthread+0x328/0x630 [ 18.036388] ret_from_fork+0x10/0x20 [ 18.036434] [ 18.036451] Allocated by task 168: [ 18.036751] kasan_save_stack+0x3c/0x68 [ 18.036916] kasan_save_track+0x20/0x40 [ 18.036955] kasan_save_alloc_info+0x40/0x58 [ 18.036993] __kasan_kmalloc+0xd4/0xd8 [ 18.037355] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.037453] kmalloc_uaf_16+0x140/0x438 [ 18.037503] kunit_try_run_case+0x170/0x3f0 [ 18.037715] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.037819] kthread+0x328/0x630 [ 18.037851] ret_from_fork+0x10/0x20 [ 18.038023] [ 18.038146] Freed by task 168: [ 18.038264] kasan_save_stack+0x3c/0x68 [ 18.038436] kasan_save_track+0x20/0x40 [ 18.038553] kasan_save_free_info+0x4c/0x78 [ 18.038694] __kasan_slab_free+0x6c/0x98 [ 18.038862] kfree+0x214/0x3c8 [ 18.038950] kmalloc_uaf_16+0x190/0x438 [ 18.039029] kunit_try_run_case+0x170/0x3f0 [ 18.039084] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.039125] kthread+0x328/0x630 [ 18.039477] ret_from_fork+0x10/0x20 [ 18.039674] [ 18.039800] The buggy address belongs to the object at fff00000c59fcbe0 [ 18.039800] which belongs to the cache kmalloc-16 of size 16 [ 18.039971] The buggy address is located 0 bytes inside of [ 18.039971] freed 16-byte region [fff00000c59fcbe0, fff00000c59fcbf0) [ 18.040134] [ 18.040249] The buggy address belongs to the physical page: [ 18.040383] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059fc [ 18.040455] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.040502] page_type: f5(slab) [ 18.040553] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.040852] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.040954] page dumped because: kasan: bad access detected [ 18.041176] [ 18.041218] Memory state around the buggy address: [ 18.041401] fff00000c59fca80: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.041540] fff00000c59fcb00: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 18.041720] >fff00000c59fcb80: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 18.041787] ^ [ 18.041824] fff00000c59fcc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.042164] fff00000c59fcc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.042330] ==================================================================
[ 13.570644] ================================================================== [ 13.571277] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 13.572067] Read of size 16 at addr ffff88810216f0e0 by task kunit_try_catch/186 [ 13.573027] [ 13.573290] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.573350] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.573364] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.573389] Call Trace: [ 13.573405] <TASK> [ 13.573426] dump_stack_lvl+0x73/0xb0 [ 13.573520] print_report+0xd1/0x650 [ 13.573559] ? __virt_addr_valid+0x1db/0x2d0 [ 13.573586] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.573609] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.573634] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.573657] kasan_report+0x141/0x180 [ 13.573682] ? kmalloc_uaf_16+0x47b/0x4c0 [ 13.573710] __asan_report_load16_noabort+0x18/0x20 [ 13.573737] kmalloc_uaf_16+0x47b/0x4c0 [ 13.573760] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 13.573784] ? __schedule+0x10cc/0x2b60 [ 13.573820] ? __pfx_read_tsc+0x10/0x10 [ 13.573844] ? ktime_get_ts64+0x86/0x230 [ 13.573873] kunit_try_run_case+0x1a5/0x480 [ 13.573900] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.573924] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.573951] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.573978] ? __kthread_parkme+0x82/0x180 [ 13.574001] ? preempt_count_sub+0x50/0x80 [ 13.574028] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.574054] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.574079] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.574104] kthread+0x337/0x6f0 [ 13.574126] ? trace_preempt_on+0x20/0xc0 [ 13.574163] ? __pfx_kthread+0x10/0x10 [ 13.574187] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.574210] ? calculate_sigpending+0x7b/0xa0 [ 13.574237] ? __pfx_kthread+0x10/0x10 [ 13.574261] ret_from_fork+0x116/0x1d0 [ 13.574282] ? __pfx_kthread+0x10/0x10 [ 13.574304] ret_from_fork_asm+0x1a/0x30 [ 13.574339] </TASK> [ 13.574352] [ 13.588593] Allocated by task 186: [ 13.588823] kasan_save_stack+0x45/0x70 [ 13.589423] kasan_save_track+0x18/0x40 [ 13.590112] kasan_save_alloc_info+0x3b/0x50 [ 13.590783] __kasan_kmalloc+0xb7/0xc0 [ 13.591343] __kmalloc_cache_noprof+0x189/0x420 [ 13.591985] kmalloc_uaf_16+0x15b/0x4c0 [ 13.592171] kunit_try_run_case+0x1a5/0x480 [ 13.592662] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.593150] kthread+0x337/0x6f0 [ 13.593302] ret_from_fork+0x116/0x1d0 [ 13.593462] ret_from_fork_asm+0x1a/0x30 [ 13.593620] [ 13.593702] Freed by task 186: [ 13.593883] kasan_save_stack+0x45/0x70 [ 13.594821] kasan_save_track+0x18/0x40 [ 13.595303] kasan_save_free_info+0x3f/0x60 [ 13.595765] __kasan_slab_free+0x56/0x70 [ 13.596216] kfree+0x222/0x3f0 [ 13.596361] kmalloc_uaf_16+0x1d6/0x4c0 [ 13.596692] kunit_try_run_case+0x1a5/0x480 [ 13.597190] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.597760] kthread+0x337/0x6f0 [ 13.598090] ret_from_fork+0x116/0x1d0 [ 13.598768] ret_from_fork_asm+0x1a/0x30 [ 13.598964] [ 13.599051] The buggy address belongs to the object at ffff88810216f0e0 [ 13.599051] which belongs to the cache kmalloc-16 of size 16 [ 13.600412] The buggy address is located 0 bytes inside of [ 13.600412] freed 16-byte region [ffff88810216f0e0, ffff88810216f0f0) [ 13.601879] [ 13.601986] The buggy address belongs to the physical page: [ 13.602434] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10216f [ 13.603222] flags: 0x200000000000000(node=0|zone=2) [ 13.603672] page_type: f5(slab) [ 13.603830] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.604105] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.604989] page dumped because: kasan: bad access detected [ 13.605976] [ 13.606269] Memory state around the buggy address: [ 13.606767] ffff88810216ef80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.607553] ffff88810216f000: fa fb fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc [ 13.607885] >ffff88810216f080: 00 05 fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 13.608194] ^ [ 13.608876] ffff88810216f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.609691] ffff88810216f180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.610674] ==================================================================