Date
May 12, 2025, 11:48 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.937257] ================================================================== [ 16.937403] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 16.937513] Read of size 1 at addr fff00000c7941028 by task kunit_try_catch/188 [ 16.937611] [ 16.937669] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT [ 16.937899] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.938092] Hardware name: linux,dummy-virt (DT) [ 16.938131] Call trace: [ 16.938156] show_stack+0x20/0x38 (C) [ 16.938214] dump_stack_lvl+0x8c/0xd0 [ 16.938569] print_report+0x118/0x608 [ 16.938669] kasan_report+0xdc/0x128 [ 16.938758] __asan_report_load1_noabort+0x20/0x30 [ 16.938861] kmalloc_uaf2+0x3f4/0x468 [ 16.939010] kunit_try_run_case+0x170/0x3f0 [ 16.939128] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.939246] kthread+0x328/0x630 [ 16.939344] ret_from_fork+0x10/0x20 [ 16.939449] [ 16.939504] Allocated by task 188: [ 16.939571] kasan_save_stack+0x3c/0x68 [ 16.939654] kasan_save_track+0x20/0x40 [ 16.939748] kasan_save_alloc_info+0x40/0x58 [ 16.939836] __kasan_kmalloc+0xd4/0xd8 [ 16.939915] __kmalloc_cache_noprof+0x15c/0x3c0 [ 16.940017] kmalloc_uaf2+0xc4/0x468 [ 16.941069] kunit_try_run_case+0x170/0x3f0 [ 16.941166] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.941259] kthread+0x328/0x630 [ 16.941337] ret_from_fork+0x10/0x20 [ 16.941418] [ 16.941458] Freed by task 188: [ 16.941829] kasan_save_stack+0x3c/0x68 [ 16.941939] kasan_save_track+0x20/0x40 [ 16.942477] kasan_save_free_info+0x4c/0x78 [ 16.942683] __kasan_slab_free+0x6c/0x98 [ 16.942769] kfree+0x214/0x3c8 [ 16.942862] kmalloc_uaf2+0x134/0x468 [ 16.942949] kunit_try_run_case+0x170/0x3f0 [ 16.943236] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.943510] kthread+0x328/0x630 [ 16.943689] ret_from_fork+0x10/0x20 [ 16.943843] [ 16.943907] The buggy address belongs to the object at fff00000c7941000 [ 16.943907] which belongs to the cache kmalloc-64 of size 64 [ 16.944109] The buggy address is located 40 bytes inside of [ 16.944109] freed 64-byte region [fff00000c7941000, fff00000c7941040) [ 16.944455] [ 16.944534] The buggy address belongs to the physical page: [ 16.944754] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107941 [ 16.944956] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.945127] page_type: f5(slab) [ 16.945204] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.945509] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.945649] page dumped because: kasan: bad access detected [ 16.945919] [ 16.946006] Memory state around the buggy address: [ 16.946244] fff00000c7940f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.946433] fff00000c7940f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.946535] >fff00000c7941000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.946802] ^ [ 16.946882] fff00000c7941080: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 16.946982] fff00000c7941100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.947185] ==================================================================
[ 16.995502] ================================================================== [ 16.996013] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 16.996683] Read of size 1 at addr ffff888102316428 by task kunit_try_catch/205 [ 16.997223] [ 16.997678] CPU: 0 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) [ 16.998157] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.998194] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.998240] Call Trace: [ 16.998281] <TASK> [ 16.998318] dump_stack_lvl+0x73/0xb0 [ 16.998380] print_report+0xd1/0x650 [ 16.998419] ? __virt_addr_valid+0x1db/0x2d0 [ 16.998448] ? kmalloc_uaf2+0x4a8/0x520 [ 16.998470] ? kasan_complete_mode_report_info+0x64/0x200 [ 16.998493] ? kmalloc_uaf2+0x4a8/0x520 [ 16.998515] kasan_report+0x141/0x180 [ 16.998538] ? kmalloc_uaf2+0x4a8/0x520 [ 16.998564] __asan_report_load1_noabort+0x18/0x20 [ 16.998585] kmalloc_uaf2+0x4a8/0x520 [ 16.998607] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 16.998628] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 16.998664] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 16.998717] kunit_try_run_case+0x1a5/0x480 [ 16.998749] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.998772] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.998798] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.998821] ? __kthread_parkme+0x82/0x180 [ 16.998844] ? preempt_count_sub+0x50/0x80 [ 16.998870] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.998894] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.998918] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.998942] kthread+0x337/0x6f0 [ 16.998963] ? trace_preempt_on+0x20/0xc0 [ 16.998997] ? __pfx_kthread+0x10/0x10 [ 16.999024] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.999055] ? calculate_sigpending+0x7b/0xa0 [ 16.999095] ? __pfx_kthread+0x10/0x10 [ 16.999128] ret_from_fork+0x116/0x1d0 [ 16.999159] ? __pfx_kthread+0x10/0x10 [ 16.999192] ret_from_fork_asm+0x1a/0x30 [ 16.999227] </TASK> [ 16.999242] [ 17.012330] Allocated by task 205: [ 17.012728] kasan_save_stack+0x45/0x70 [ 17.013300] kasan_save_track+0x18/0x40 [ 17.013713] kasan_save_alloc_info+0x3b/0x50 [ 17.014218] __kasan_kmalloc+0xb7/0xc0 [ 17.014663] __kmalloc_cache_noprof+0x189/0x420 [ 17.015245] kmalloc_uaf2+0xc6/0x520 [ 17.015464] kunit_try_run_case+0x1a5/0x480 [ 17.016066] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.016409] kthread+0x337/0x6f0 [ 17.016618] ret_from_fork+0x116/0x1d0 [ 17.016901] ret_from_fork_asm+0x1a/0x30 [ 17.017182] [ 17.017355] Freed by task 205: [ 17.017610] kasan_save_stack+0x45/0x70 [ 17.017803] kasan_save_track+0x18/0x40 [ 17.018113] kasan_save_free_info+0x3f/0x60 [ 17.018603] __kasan_slab_free+0x56/0x70 [ 17.018901] kfree+0x222/0x3f0 [ 17.019358] kmalloc_uaf2+0x14c/0x520 [ 17.019613] kunit_try_run_case+0x1a5/0x480 [ 17.019943] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.020412] kthread+0x337/0x6f0 [ 17.020607] ret_from_fork+0x116/0x1d0 [ 17.020942] ret_from_fork_asm+0x1a/0x30 [ 17.021449] [ 17.021641] The buggy address belongs to the object at ffff888102316400 [ 17.021641] which belongs to the cache kmalloc-64 of size 64 [ 17.022483] The buggy address is located 40 bytes inside of [ 17.022483] freed 64-byte region [ffff888102316400, ffff888102316440) [ 17.023341] [ 17.023527] The buggy address belongs to the physical page: [ 17.023990] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102316 [ 17.024548] flags: 0x200000000000000(node=0|zone=2) [ 17.024982] page_type: f5(slab) [ 17.025426] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 17.025838] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 17.026527] page dumped because: kasan: bad access detected [ 17.026971] [ 17.027326] Memory state around the buggy address: [ 17.027573] ffff888102316300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 17.028185] ffff888102316380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 17.028728] >ffff888102316400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 17.029208] ^ [ 17.029591] ffff888102316480: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 17.030295] ffff888102316500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.030724] ==================================================================