Date
May 13, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.285023] ================================================================== [ 19.285120] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 19.285212] Read of size 16 at addr fff00000c40350e0 by task kunit_try_catch/168 [ 19.285268] [ 19.285316] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT [ 19.285412] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.286722] Hardware name: linux,dummy-virt (DT) [ 19.286929] Call trace: [ 19.286989] show_stack+0x20/0x38 (C) [ 19.287063] dump_stack_lvl+0x8c/0xd0 [ 19.287189] print_report+0x118/0x608 [ 19.287370] kasan_report+0xdc/0x128 [ 19.287486] __asan_report_load16_noabort+0x20/0x30 [ 19.287875] kmalloc_uaf_16+0x3bc/0x438 [ 19.287950] kunit_try_run_case+0x170/0x3f0 [ 19.288032] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.288093] kthread+0x328/0x630 [ 19.288371] ret_from_fork+0x10/0x20 [ 19.288638] [ 19.288667] Allocated by task 168: [ 19.288732] kasan_save_stack+0x3c/0x68 [ 19.288930] kasan_save_track+0x20/0x40 [ 19.288993] kasan_save_alloc_info+0x40/0x58 [ 19.289042] __kasan_kmalloc+0xd4/0xd8 [ 19.289084] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.289136] kmalloc_uaf_16+0x140/0x438 [ 19.289373] kunit_try_run_case+0x170/0x3f0 [ 19.289451] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.289690] kthread+0x328/0x630 [ 19.290124] ret_from_fork+0x10/0x20 [ 19.290209] [ 19.290463] Freed by task 168: [ 19.290665] kasan_save_stack+0x3c/0x68 [ 19.291002] kasan_save_track+0x20/0x40 [ 19.291344] kasan_save_free_info+0x4c/0x78 [ 19.291415] __kasan_slab_free+0x6c/0x98 [ 19.291809] kfree+0x214/0x3c8 [ 19.291928] kmalloc_uaf_16+0x190/0x438 [ 19.291982] kunit_try_run_case+0x170/0x3f0 [ 19.292025] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.292746] kthread+0x328/0x630 [ 19.292809] ret_from_fork+0x10/0x20 [ 19.293017] [ 19.293149] The buggy address belongs to the object at fff00000c40350e0 [ 19.293149] which belongs to the cache kmalloc-16 of size 16 [ 19.293304] The buggy address is located 0 bytes inside of [ 19.293304] freed 16-byte region [fff00000c40350e0, fff00000c40350f0) [ 19.293372] [ 19.293397] The buggy address belongs to the physical page: [ 19.293440] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104035 [ 19.293513] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.293570] page_type: f5(slab) [ 19.293621] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.293677] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.293721] page dumped because: kasan: bad access detected [ 19.293755] [ 19.293774] Memory state around the buggy address: [ 19.293819] fff00000c4034f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.293872] fff00000c4035000: 00 02 fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 19.293919] >fff00000c4035080: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 19.293980] ^ [ 19.294070] fff00000c4035100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.294113] fff00000c4035180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.294186] ==================================================================
[ 11.092864] ================================================================== [ 11.093416] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 11.094271] Read of size 16 at addr ffff888101c86980 by task kunit_try_catch/185 [ 11.095042] [ 11.095135] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT(voluntary) [ 11.095210] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.095222] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.095242] Call Trace: [ 11.095254] <TASK> [ 11.095270] dump_stack_lvl+0x73/0xb0 [ 11.095318] print_report+0xd1/0x650 [ 11.095341] ? __virt_addr_valid+0x1db/0x2d0 [ 11.095388] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.095409] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.095431] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.095452] kasan_report+0x141/0x180 [ 11.095519] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.095546] __asan_report_load16_noabort+0x18/0x20 [ 11.095566] kmalloc_uaf_16+0x47b/0x4c0 [ 11.095587] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.095609] ? __schedule+0x10cc/0x2b60 [ 11.095641] ? __pfx_read_tsc+0x10/0x10 [ 11.095662] ? ktime_get_ts64+0x86/0x230 [ 11.095688] kunit_try_run_case+0x1a5/0x480 [ 11.095713] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.095734] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.095757] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.095778] ? __kthread_parkme+0x82/0x180 [ 11.095799] ? preempt_count_sub+0x50/0x80 [ 11.095824] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.095846] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.095869] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.095891] kthread+0x337/0x6f0 [ 11.095910] ? trace_preempt_on+0x20/0xc0 [ 11.095934] ? __pfx_kthread+0x10/0x10 [ 11.095956] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.095976] ? calculate_sigpending+0x7b/0xa0 [ 11.096000] ? __pfx_kthread+0x10/0x10 [ 11.096021] ret_from_fork+0x116/0x1d0 [ 11.096039] ? __pfx_kthread+0x10/0x10 [ 11.096059] ret_from_fork_asm+0x1a/0x30 [ 11.096091] </TASK> [ 11.096101] [ 11.107367] Allocated by task 185: [ 11.107789] kasan_save_stack+0x45/0x70 [ 11.108189] kasan_save_track+0x18/0x40 [ 11.108746] kasan_save_alloc_info+0x3b/0x50 [ 11.109247] __kasan_kmalloc+0xb7/0xc0 [ 11.109600] __kmalloc_cache_noprof+0x189/0x420 [ 11.110080] kmalloc_uaf_16+0x15b/0x4c0 [ 11.110603] kunit_try_run_case+0x1a5/0x480 [ 11.111025] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.111627] kthread+0x337/0x6f0 [ 11.112027] ret_from_fork+0x116/0x1d0 [ 11.112425] ret_from_fork_asm+0x1a/0x30 [ 11.112885] [ 11.113057] Freed by task 185: [ 11.113369] kasan_save_stack+0x45/0x70 [ 11.113774] kasan_save_track+0x18/0x40 [ 11.114126] kasan_save_free_info+0x3f/0x60 [ 11.114590] __kasan_slab_free+0x56/0x70 [ 11.115018] kfree+0x222/0x3f0 [ 11.115322] kmalloc_uaf_16+0x1d6/0x4c0 [ 11.115710] kunit_try_run_case+0x1a5/0x480 [ 11.116206] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.116791] kthread+0x337/0x6f0 [ 11.117115] ret_from_fork+0x116/0x1d0 [ 11.117519] ret_from_fork_asm+0x1a/0x30 [ 11.117948] [ 11.118123] The buggy address belongs to the object at ffff888101c86980 [ 11.118123] which belongs to the cache kmalloc-16 of size 16 [ 11.119300] The buggy address is located 0 bytes inside of [ 11.119300] freed 16-byte region [ffff888101c86980, ffff888101c86990) [ 11.120222] [ 11.120303] The buggy address belongs to the physical page: [ 11.120476] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c86 [ 11.121193] flags: 0x200000000000000(node=0|zone=2) [ 11.121707] page_type: f5(slab) [ 11.122014] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.122676] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.123013] page dumped because: kasan: bad access detected [ 11.123191] [ 11.123356] Memory state around the buggy address: [ 11.123836] ffff888101c86880: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.124578] ffff888101c86900: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 11.125328] >ffff888101c86980: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.125788] ^ [ 11.126089] ffff888101c86a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.126734] ffff888101c86a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.126961] ==================================================================