Date
June 23, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.861142] ================================================================== [ 32.861390] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 32.861683] Read of size 16 at addr fff00000c56f12e0 by task kunit_try_catch/180 [ 32.861808] [ 32.862003] CPU: 1 UID: 0 PID: 180 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT [ 32.862903] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.862969] Hardware name: linux,dummy-virt (DT) [ 32.863067] Call trace: [ 32.863317] show_stack+0x20/0x38 (C) [ 32.863447] dump_stack_lvl+0x8c/0xd0 [ 32.864339] print_report+0x118/0x608 [ 32.864811] kasan_report+0xdc/0x128 [ 32.865660] __asan_report_load16_noabort+0x20/0x30 [ 32.866220] kmalloc_uaf_16+0x3bc/0x438 [ 32.866455] kunit_try_run_case+0x170/0x3f0 [ 32.867350] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.867997] kthread+0x328/0x630 [ 32.868342] ret_from_fork+0x10/0x20 [ 32.868464] [ 32.868508] Allocated by task 180: [ 32.868575] kasan_save_stack+0x3c/0x68 [ 32.869878] kasan_save_track+0x20/0x40 [ 32.870467] kasan_save_alloc_info+0x40/0x58 [ 32.871279] __kasan_kmalloc+0xd4/0xd8 [ 32.871402] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.871833] kmalloc_uaf_16+0x140/0x438 [ 32.871944] kunit_try_run_case+0x170/0x3f0 [ 32.872419] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.873048] kthread+0x328/0x630 [ 32.873140] ret_from_fork+0x10/0x20 [ 32.873547] [ 32.873892] Freed by task 180: [ 32.874445] kasan_save_stack+0x3c/0x68 [ 32.874654] kasan_save_track+0x20/0x40 [ 32.874918] kasan_save_free_info+0x4c/0x78 [ 32.875102] __kasan_slab_free+0x6c/0x98 [ 32.875865] kfree+0x214/0x3c8 [ 32.876667] kmalloc_uaf_16+0x190/0x438 [ 32.877167] kunit_try_run_case+0x170/0x3f0 [ 32.877269] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.877741] kthread+0x328/0x630 [ 32.878384] ret_from_fork+0x10/0x20 [ 32.878484] [ 32.878957] The buggy address belongs to the object at fff00000c56f12e0 [ 32.878957] which belongs to the cache kmalloc-16 of size 16 [ 32.879204] The buggy address is located 0 bytes inside of [ 32.879204] freed 16-byte region [fff00000c56f12e0, fff00000c56f12f0) [ 32.879571] [ 32.879623] The buggy address belongs to the physical page: [ 32.879693] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056f1 [ 32.879813] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.879925] page_type: f5(slab) [ 32.880485] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 32.881190] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 32.881775] page dumped because: kasan: bad access detected [ 32.881851] [ 32.881895] Memory state around the buggy address: [ 32.881971] fff00000c56f1180: fa fb fc fc 00 00 fc fc fa fb fc fc fa fb fc fc [ 32.883270] fff00000c56f1200: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.883392] >fff00000c56f1280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.884485] ^ [ 32.884661] fff00000c56f1300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.884764] fff00000c56f1380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.885072] ==================================================================
[ 21.774710] ================================================================== [ 21.775143] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 21.775619] Read of size 16 at addr ffff8881023702e0 by task kunit_try_catch/197 [ 21.776060] [ 21.776196] CPU: 0 UID: 0 PID: 197 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT(voluntary) [ 21.776265] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.776278] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 21.776297] Call Trace: [ 21.776310] <TASK> [ 21.776326] dump_stack_lvl+0x73/0xb0 [ 21.776353] print_report+0xd1/0x650 [ 21.776371] ? __virt_addr_valid+0x1db/0x2d0 [ 21.776639] ? kmalloc_uaf_16+0x47b/0x4c0 [ 21.776670] ? kasan_complete_mode_report_info+0x64/0x200 [ 21.776694] ? kmalloc_uaf_16+0x47b/0x4c0 [ 21.776712] kasan_report+0x141/0x180 [ 21.776731] ? kmalloc_uaf_16+0x47b/0x4c0 [ 21.776753] __asan_report_load16_noabort+0x18/0x20 [ 21.776774] kmalloc_uaf_16+0x47b/0x4c0 [ 21.776791] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 21.776809] ? __schedule+0x10cc/0x2b60 [ 21.776830] ? __pfx_read_tsc+0x10/0x10 [ 21.777227] ? ktime_get_ts64+0x86/0x230 [ 21.777255] kunit_try_run_case+0x1a5/0x480 [ 21.777278] ? __pfx_kunit_try_run_case+0x10/0x10 [ 21.777298] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 21.777317] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 21.777337] ? __kthread_parkme+0x82/0x180 [ 21.777354] ? preempt_count_sub+0x50/0x80 [ 21.777373] ? __pfx_kunit_try_run_case+0x10/0x10 [ 21.777414] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 21.777434] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 21.777454] kthread+0x337/0x6f0 [ 21.777471] ? trace_preempt_on+0x20/0xc0 [ 21.777491] ? __pfx_kthread+0x10/0x10 [ 21.777508] ? _raw_spin_unlock_irq+0x47/0x80 [ 21.777526] ? calculate_sigpending+0x7b/0xa0 [ 21.777546] ? __pfx_kthread+0x10/0x10 [ 21.777564] ret_from_fork+0x116/0x1d0 [ 21.777580] ? __pfx_kthread+0x10/0x10 [ 21.777597] ret_from_fork_asm+0x1a/0x30 [ 21.777624] </TASK> [ 21.777636] [ 21.788536] Allocated by task 197: [ 21.788821] kasan_save_stack+0x45/0x70 [ 21.789075] kasan_save_track+0x18/0x40 [ 21.789533] kasan_save_alloc_info+0x3b/0x50 [ 21.789736] __kasan_kmalloc+0xb7/0xc0 [ 21.790229] __kmalloc_cache_noprof+0x189/0x420 [ 21.790468] kmalloc_uaf_16+0x15b/0x4c0 [ 21.790631] kunit_try_run_case+0x1a5/0x480 [ 21.790824] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 21.791080] kthread+0x337/0x6f0 [ 21.791231] ret_from_fork+0x116/0x1d0 [ 21.791411] ret_from_fork_asm+0x1a/0x30 [ 21.791591] [ 21.791672] Freed by task 197: [ 21.791812] kasan_save_stack+0x45/0x70 [ 21.792562] kasan_save_track+0x18/0x40 [ 21.792800] kasan_save_free_info+0x3f/0x60 [ 21.792956] __kasan_slab_free+0x56/0x70 [ 21.793095] kfree+0x222/0x3f0 [ 21.793796] kmalloc_uaf_16+0x1d6/0x4c0 [ 21.794000] kunit_try_run_case+0x1a5/0x480 [ 21.794229] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 21.794470] kthread+0x337/0x6f0 [ 21.794633] ret_from_fork+0x116/0x1d0 [ 21.794799] ret_from_fork_asm+0x1a/0x30 [ 21.795521] [ 21.795786] The buggy address belongs to the object at ffff8881023702e0 [ 21.795786] which belongs to the cache kmalloc-16 of size 16 [ 21.796508] The buggy address is located 0 bytes inside of [ 21.796508] freed 16-byte region [ffff8881023702e0, ffff8881023702f0) [ 21.797093] [ 21.797307] The buggy address belongs to the physical page: [ 21.797674] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102370 [ 21.798417] flags: 0x200000000000000(node=0|zone=2) [ 21.798613] page_type: f5(slab) [ 21.798764] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 21.799007] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 21.799412] page dumped because: kasan: bad access detected [ 21.799787] [ 21.799956] Memory state around the buggy address: [ 21.800342] ffff888102370180: 00 05 fc fc 00 00 fc fc 00 06 fc fc 00 06 fc fc [ 21.800909] ffff888102370200: 00 00 fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 21.801125] >ffff888102370280: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 21.801524] ^ [ 21.801767] ffff888102370300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.802252] ffff888102370380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.802534] ==================================================================