netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. BUG: unable to handle page fault for address: ffffed100fffc000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 7ffd3067 P4D 7ffd3067 PUD 7ffd2067 PMD 7ffd1067 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 6609 Comm: syz-executor.2 Not tainted 6.1.0-rc3-next-20221031 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__memset+0x24/0x50 Code: 90 90 90 90 90 90 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 e9 4d d4 12 00 66 66 2e 0f 1f 84 00 RSP: 0018:ffff88803567f048 EFLAGS: 00010016 RAX: 0000000000000000 RBX: ffff888008647100 RCX: 1ffffe21fe432a98 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed100fffc000 RBP: ffff888008643500 R08: 0000000000000005 R09: ffffed10010c8e20 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888008647100 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000400 FS: 00007f25c6eb3700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed100fffc000 CR3: 000000001e072000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 Call Trace: <TASK> kasan_unpoison+0x23/0x60 remove_element+0x12e/0x1a0 mempool_alloc+0x22f/0x380 bio_alloc_bioset+0x39a/0x790 ext4_bio_write_page+0xa28/0x1880 mpage_submit_page+0x127/0x230 ext4_writepages+0x2085/0x36a0 do_writepages+0x1b0/0x6b0 filemap_fdatawrite_wbc+0x147/0x1c0 __filemap_fdatawrite_range+0xb6/0x110 file_write_and_wait_range+0xb6/0x140 ext4_sync_file+0x21d/0xfb0 vfs_fsync_range+0x13d/0x240 ext4_buffered_write_iter+0x37d/0x470 ext4_file_write_iter+0x3fb/0x1910 do_iter_readv_writev+0x211/0x3d0 do_iter_write+0x18b/0x710 vfs_writev+0x1ae/0x640 __x64_sys_pwritev+0x22f/0x320 do_syscall_64+0x3b/0xa0 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f25c993db19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f25c6eb3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 RAX: ffffffffffffffda RBX: 00007f25c9a50f60 RCX: 00007f25c993db19 RDX: 0000000000000005 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f25c6eb31d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fff7e6e4d4f R14: 00007f25c6eb3300 R15: 0000000000022000 </TASK> Modules linked in: CR2: ffffed100fffc000 ---[ end trace 0000000000000000 ]--- RIP: 0010:__memset+0x24/0x50 Code: 90 90 90 90 90 90 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 e9 4d d4 12 00 66 66 2e 0f 1f 84 00 RSP: 0018:ffff88803567f048 EFLAGS: 00010016 RAX: 0000000000000000 RBX: ffff888008647100 RCX: 1ffffe21fe432a98 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed100fffc000 RBP: ffff888008643500 R08: 0000000000000005 R09: ffffed10010c8e20 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888008647100 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000400 FS: 00007f25c6eb3700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed100fffc000 CR3: 000000001e072000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 note: syz-executor.2[6609] exited with preempt_count 1 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6609 at kernel/exit.c:765 do_exit+0x1c1e/0x2730 Modules linked in: CPU: 1 PID: 6609 Comm: syz-executor.2 Tainted: G D 6.1.0-rc3-next-20221031 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:do_exit+0x1c1e/0x2730 Code: 00 00 65 01 05 ff a8 eb 7e e9 5b fb ff ff e8 d9 96 30 00 4c 89 f6 bf 05 06 00 00 e8 0c de 02 00 e9 ac e8 ff ff e8 c2 96 30 00 <0f> 0b e9 e6 e5 ff ff e8 b6 96 30 00 48 89 ef e8 1e 77 2f 00 e9 8d RSP: 0018:ffff88803567fe48 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff88801e7fa880 RCX: ffffc9000940d000 RDX: 0000000000040000 RSI: ffffffff811793fe RDI: ffff888015be4670 RBP: ffff888015be3580 R08: 0000000000000000 R09: 0000000000000000 R10: ffffed1001110250 R11: 0000000000000001 R12: ffff888015be3d18 R13: ffff888008881280 R14: 0000000000000009 R15: 0000000000000001 FS: 00007f25c6eb3700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed100fffc000 CR3: 000000001e072000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400 Call Trace: <TASK> make_task_dead+0x102/0x130 rewind_stack_and_make_dead+0x17/0x30 RIP: 0033:0x7f25c993db19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f25c6eb3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 RAX: ffffffffffffffda RBX: 00007f25c9a50f60 RCX: 00007f25c993db19 RDX: 0000000000000005 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f25c6eb31d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fff7e6e4d4f R14: 00007f25c6eb3300 R15: 0000000000022000 </TASK> irq event stamp: 774 hardirqs last enabled at (773): [<ffffffff8160ba26>] __folio_start_writeback+0x616/0x980 hardirqs last disabled at (774): [<ffffffff8438fdc2>] _raw_spin_lock_irqsave+0x52/0x70 softirqs last enabled at (728): [<ffffffff8117d25b>] __irq_exit_rcu+0x11b/0x190 softirqs last disabled at (719): [<ffffffff8117d25b>] __irq_exit_rcu+0x11b/0x190 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) b: 49 89 f9 mov %rdi,%r9 e: 48 89 d1 mov %rdx,%rcx 11: 83 e2 07 and $0x7,%edx 14: 48 c1 e9 03 shr $0x3,%rcx 18: 40 0f b6 f6 movzbl %sil,%esi 1c: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax 23: 01 01 01 26: 48 0f af c6 imul %rsi,%rax * 2a: f3 48 ab rep stos %rax,%es:(%rdi) <-- trapping instruction 2d: 89 d1 mov %edx,%ecx 2f: f3 aa rep stos %al,%es:(%rdi) 31: 4c 89 c8 mov %r9,%rax 34: e9 4d d4 12 00 jmpq 0x12d486 39: 66 data16 3a: 66 data16 3b: 2e cs 3c: 0f .byte 0xf 3d: 1f (bad) 3e: 84 00 test %al,(%rax)