Date
May 29, 2025, 7:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.470309] ================================================================== [ 21.470586] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 21.470775] Read of size 16 at addr fff00000c66b1080 by task kunit_try_catch/168 [ 21.470970] [ 21.471109] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT [ 21.471363] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.471443] Hardware name: linux,dummy-virt (DT) [ 21.471515] Call trace: [ 21.471571] show_stack+0x20/0x38 (C) [ 21.471751] dump_stack_lvl+0x8c/0xd0 [ 21.471932] print_report+0x118/0x608 [ 21.472096] kasan_report+0xdc/0x128 [ 21.472435] __asan_report_load16_noabort+0x20/0x30 [ 21.472946] kmalloc_uaf_16+0x3bc/0x438 [ 21.473057] kunit_try_run_case+0x170/0x3f0 [ 21.473167] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.473279] kthread+0x328/0x630 [ 21.473365] ret_from_fork+0x10/0x20 [ 21.473485] [ 21.473528] Allocated by task 168: [ 21.473593] kasan_save_stack+0x3c/0x68 [ 21.473975] kasan_save_track+0x20/0x40 [ 21.474069] kasan_save_alloc_info+0x40/0x58 [ 21.474163] __kasan_kmalloc+0xd4/0xd8 [ 21.474253] __kmalloc_cache_noprof+0x15c/0x3c0 [ 21.474481] kmalloc_uaf_16+0x140/0x438 [ 21.474570] kunit_try_run_case+0x170/0x3f0 [ 21.474653] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.474752] kthread+0x328/0x630 [ 21.474837] ret_from_fork+0x10/0x20 [ 21.474949] [ 21.475161] Freed by task 168: [ 21.475254] kasan_save_stack+0x3c/0x68 [ 21.475437] kasan_save_track+0x20/0x40 [ 21.475571] kasan_save_free_info+0x4c/0x78 [ 21.475698] __kasan_slab_free+0x6c/0x98 [ 21.475786] kfree+0x214/0x3c8 [ 21.475882] kmalloc_uaf_16+0x190/0x438 [ 21.476005] kunit_try_run_case+0x170/0x3f0 [ 21.476099] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.476206] kthread+0x328/0x630 [ 21.476285] ret_from_fork+0x10/0x20 [ 21.476376] [ 21.476440] The buggy address belongs to the object at fff00000c66b1080 [ 21.476440] which belongs to the cache kmalloc-16 of size 16 [ 21.476587] The buggy address is located 0 bytes inside of [ 21.476587] freed 16-byte region [fff00000c66b1080, fff00000c66b1090) [ 21.476747] [ 21.476867] The buggy address belongs to the physical page: [ 21.476969] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1066b1 [ 21.477165] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.477312] page_type: f5(slab) [ 21.477422] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 21.477542] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 21.477690] page dumped because: kasan: bad access detected [ 21.477783] [ 21.477833] Memory state around the buggy address: [ 21.477925] fff00000c66b0f80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc [ 21.478252] fff00000c66b1000: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 21.478529] >fff00000c66b1080: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.478743] ^ [ 21.479029] fff00000c66b1100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.479222] fff00000c66b1180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.479442] ==================================================================
[ 10.896800] ================================================================== [ 10.897694] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 10.898547] Read of size 16 at addr ffff888102856060 by task kunit_try_catch/185 [ 10.899045] [ 10.899313] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT(voluntary) [ 10.899362] Tainted: [B]=BAD_PAGE, [N]=TEST [ 10.899374] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 10.899396] Call Trace: [ 10.899408] <TASK> [ 10.899424] dump_stack_lvl+0x73/0xb0 [ 10.899484] print_report+0xd1/0x650 [ 10.899507] ? __virt_addr_valid+0x1db/0x2d0 [ 10.899530] ? kmalloc_uaf_16+0x47b/0x4c0 [ 10.899550] ? kasan_complete_mode_report_info+0x64/0x200 [ 10.899572] ? kmalloc_uaf_16+0x47b/0x4c0 [ 10.899593] kasan_report+0x141/0x180 [ 10.899626] ? kmalloc_uaf_16+0x47b/0x4c0 [ 10.899652] __asan_report_load16_noabort+0x18/0x20 [ 10.899672] kmalloc_uaf_16+0x47b/0x4c0 [ 10.899693] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 10.899715] ? __schedule+0x10cc/0x2b60 [ 10.899739] ? __pfx_read_tsc+0x10/0x10 [ 10.899767] ? ktime_get_ts64+0x86/0x230 [ 10.899792] kunit_try_run_case+0x1a5/0x480 [ 10.899814] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.899833] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 10.899857] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 10.899881] ? __kthread_parkme+0x82/0x180 [ 10.899902] ? preempt_count_sub+0x50/0x80 [ 10.899926] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.899946] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 10.899970] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 10.899994] kthread+0x337/0x6f0 [ 10.900013] ? trace_preempt_on+0x20/0xc0 [ 10.900037] ? __pfx_kthread+0x10/0x10 [ 10.900057] ? _raw_spin_unlock_irq+0x47/0x80 [ 10.900078] ? calculate_sigpending+0x7b/0xa0 [ 10.900103] ? __pfx_kthread+0x10/0x10 [ 10.900124] ret_from_fork+0x116/0x1d0 [ 10.900141] ? __pfx_kthread+0x10/0x10 [ 10.900161] ret_from_fork_asm+0x1a/0x30 [ 10.900192] </TASK> [ 10.900202] [ 10.914379] Allocated by task 185: [ 10.914520] kasan_save_stack+0x45/0x70 [ 10.914696] kasan_save_track+0x18/0x40 [ 10.914979] kasan_save_alloc_info+0x3b/0x50 [ 10.915172] __kasan_kmalloc+0xb7/0xc0 [ 10.915330] __kmalloc_cache_noprof+0x189/0x420 [ 10.915508] kmalloc_uaf_16+0x15b/0x4c0 [ 10.915716] kunit_try_run_case+0x1a5/0x480 [ 10.915912] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 10.916141] kthread+0x337/0x6f0 [ 10.916266] ret_from_fork+0x116/0x1d0 [ 10.916889] ret_from_fork_asm+0x1a/0x30 [ 10.917118] [ 10.917220] Freed by task 185: [ 10.917380] kasan_save_stack+0x45/0x70 [ 10.917578] kasan_save_track+0x18/0x40 [ 10.917761] kasan_save_free_info+0x3f/0x60 [ 10.917963] __kasan_slab_free+0x56/0x70 [ 10.918346] kfree+0x222/0x3f0 [ 10.918493] kmalloc_uaf_16+0x1d6/0x4c0 [ 10.918683] kunit_try_run_case+0x1a5/0x480 [ 10.918987] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 10.919270] kthread+0x337/0x6f0 [ 10.919396] ret_from_fork+0x116/0x1d0 [ 10.919575] ret_from_fork_asm+0x1a/0x30 [ 10.919929] [ 10.920020] The buggy address belongs to the object at ffff888102856060 [ 10.920020] which belongs to the cache kmalloc-16 of size 16 [ 10.920508] The buggy address is located 0 bytes inside of [ 10.920508] freed 16-byte region [ffff888102856060, ffff888102856070) [ 10.921551] [ 10.921653] The buggy address belongs to the physical page: [ 10.922203] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102856 [ 10.922848] flags: 0x200000000000000(node=0|zone=2) [ 10.923204] page_type: f5(slab) [ 10.923353] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 10.924050] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 10.924397] page dumped because: kasan: bad access detected [ 10.924630] [ 10.924729] Memory state around the buggy address: [ 10.925184] ffff888102855f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.925620] ffff888102855f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.926095] >ffff888102856000: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 10.926513] ^ [ 10.927017] ffff888102856080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.927341] ffff888102856100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.927681] ==================================================================