Date
July 25, 2025, 3:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.500466] ================================================================== [ 32.500527] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 32.500582] Read of size 1 at addr fff00000c85ecec8 by task kunit_try_catch/216 [ 32.500632] [ 32.500685] CPU: 1 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250725 #1 PREEMPT [ 32.500774] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 32.500806] Hardware name: linux,dummy-virt (DT) [ 32.500847] Call trace: [ 32.500870] show_stack+0x20/0x38 (C) [ 32.500916] dump_stack_lvl+0x8c/0xd0 [ 32.500962] print_report+0x118/0x5e8 [ 32.501023] kasan_report+0xdc/0x128 [ 32.501067] __asan_report_load1_noabort+0x20/0x30 [ 32.501124] kmalloc_uaf+0x300/0x338 [ 32.501169] kunit_try_run_case+0x170/0x3f0 [ 32.501216] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.501275] kthread+0x328/0x630 [ 32.501316] ret_from_fork+0x10/0x20 [ 32.501363] [ 32.501382] Allocated by task 216: [ 32.501409] kasan_save_stack+0x3c/0x68 [ 32.501457] kasan_save_track+0x20/0x40 [ 32.501500] kasan_save_alloc_info+0x40/0x58 [ 32.501544] __kasan_kmalloc+0xd4/0xd8 [ 32.501579] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.501620] kmalloc_uaf+0xb8/0x338 [ 32.501690] kunit_try_run_case+0x170/0x3f0 [ 32.501730] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.501773] kthread+0x328/0x630 [ 32.502073] ret_from_fork+0x10/0x20 [ 32.502133] [ 32.502801] Freed by task 216: [ 32.502853] kasan_save_stack+0x3c/0x68 [ 32.502905] kasan_save_track+0x20/0x40 [ 32.502961] kasan_save_free_info+0x4c/0x78 [ 32.503204] __kasan_slab_free+0x7c/0xa8 [ 32.503535] kfree+0x214/0x3c8 [ 32.503661] kmalloc_uaf+0x11c/0x338 [ 32.503700] kunit_try_run_case+0x170/0x3f0 [ 32.503738] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.504081] kthread+0x328/0x630 [ 32.504214] ret_from_fork+0x10/0x20 [ 32.504296] [ 32.504347] The buggy address belongs to the object at fff00000c85ecec0 [ 32.504347] which belongs to the cache kmalloc-16 of size 16 [ 32.504504] The buggy address is located 8 bytes inside of [ 32.504504] freed 16-byte region [fff00000c85ecec0, fff00000c85eced0) [ 32.504743] [ 32.504767] The buggy address belongs to the physical page: [ 32.504802] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1085ec [ 32.504882] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.505302] page_type: f5(slab) [ 32.505359] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 32.505492] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 32.505725] page dumped because: kasan: bad access detected [ 32.505944] [ 32.506263] Memory state around the buggy address: [ 32.506725] fff00000c85ecd80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.506866] fff00000c85ece00: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 32.507091] >fff00000c85ece80: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 32.507184] ^ [ 32.507372] fff00000c85ecf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.507422] fff00000c85ecf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.507523] ==================================================================
[ 26.010550] ================================================================== [ 26.011375] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 26.011704] Read of size 1 at addr ffff8881057d7648 by task kunit_try_catch/233 [ 26.012233] [ 26.012429] CPU: 0 UID: 0 PID: 233 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary) [ 26.012590] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.012607] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.012628] Call Trace: [ 26.012642] <TASK> [ 26.012659] dump_stack_lvl+0x73/0xb0 [ 26.012690] print_report+0xd1/0x640 [ 26.012713] ? __virt_addr_valid+0x1db/0x2d0 [ 26.012738] ? kmalloc_uaf+0x320/0x380 [ 26.012758] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.012786] ? kmalloc_uaf+0x320/0x380 [ 26.012928] kasan_report+0x141/0x180 [ 26.012969] ? kmalloc_uaf+0x320/0x380 [ 26.012995] __asan_report_load1_noabort+0x18/0x20 [ 26.013020] kmalloc_uaf+0x320/0x380 [ 26.013040] ? __pfx_kmalloc_uaf+0x10/0x10 [ 26.013072] ? __schedule+0x10da/0x2b60 [ 26.013096] ? __pfx_read_tsc+0x10/0x10 [ 26.013119] ? ktime_get_ts64+0x86/0x230 [ 26.013148] kunit_try_run_case+0x1a5/0x480 [ 26.013172] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.013195] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.013217] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.013244] ? __kthread_parkme+0x82/0x180 [ 26.013264] ? preempt_count_sub+0x50/0x80 [ 26.013288] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.013312] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.013336] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.013360] kthread+0x337/0x6f0 [ 26.013380] ? trace_preempt_on+0x20/0xc0 [ 26.013404] ? __pfx_kthread+0x10/0x10 [ 26.013425] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.013449] ? calculate_sigpending+0x7b/0xa0 [ 26.013473] ? __pfx_kthread+0x10/0x10 [ 26.013495] ret_from_fork+0x116/0x1d0 [ 26.013515] ? __pfx_kthread+0x10/0x10 [ 26.013536] ret_from_fork_asm+0x1a/0x30 [ 26.013568] </TASK> [ 26.013579] [ 26.023118] Allocated by task 233: [ 26.023405] kasan_save_stack+0x45/0x70 [ 26.023659] kasan_save_track+0x18/0x40 [ 26.023834] kasan_save_alloc_info+0x3b/0x50 [ 26.024273] __kasan_kmalloc+0xb7/0xc0 [ 26.024452] __kmalloc_cache_noprof+0x189/0x420 [ 26.024787] kmalloc_uaf+0xaa/0x380 [ 26.025293] kunit_try_run_case+0x1a5/0x480 [ 26.025487] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.025725] kthread+0x337/0x6f0 [ 26.026108] ret_from_fork+0x116/0x1d0 [ 26.026288] ret_from_fork_asm+0x1a/0x30 [ 26.026477] [ 26.026706] Freed by task 233: [ 26.026827] kasan_save_stack+0x45/0x70 [ 26.027222] kasan_save_track+0x18/0x40 [ 26.027423] kasan_save_free_info+0x3f/0x60 [ 26.027608] __kasan_slab_free+0x5e/0x80 [ 26.027775] kfree+0x222/0x3f0 [ 26.027930] kmalloc_uaf+0x12c/0x380 [ 26.028381] kunit_try_run_case+0x1a5/0x480 [ 26.028661] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.028921] kthread+0x337/0x6f0 [ 26.029226] ret_from_fork+0x116/0x1d0 [ 26.029414] ret_from_fork_asm+0x1a/0x30 [ 26.029592] [ 26.029676] The buggy address belongs to the object at ffff8881057d7640 [ 26.029676] which belongs to the cache kmalloc-16 of size 16 [ 26.030562] The buggy address is located 8 bytes inside of [ 26.030562] freed 16-byte region [ffff8881057d7640, ffff8881057d7650) [ 26.031704] [ 26.031799] The buggy address belongs to the physical page: [ 26.032256] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057d7 [ 26.032711] flags: 0x200000000000000(node=0|zone=2) [ 26.033141] page_type: f5(slab) [ 26.033276] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 26.033620] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 26.033922] page dumped because: kasan: bad access detected [ 26.034179] [ 26.034537] Memory state around the buggy address: [ 26.034760] ffff8881057d7500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.035397] ffff8881057d7580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 26.035840] >ffff8881057d7600: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 26.036161] ^ [ 26.036538] ffff8881057d7680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.036921] ffff8881057d7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.037438] ==================================================================