BUG: unable to handle kernel paging request at ffffebe000000008 PGD 0 P4D 0 Oops: 0000 [#1] SMP KASAN CPU: 0 PID: 15212 Comm: syz-executor2 Not tainted 4.18.0+ #186 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. RIP: 0010:virt_to_head_page include/linux/mm.h:657 [inline] RIP: 0010:virt_to_cache mm/slab.c:399 [inline] RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809 Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 4c 8b 6a 18 49 63 75 74 RSP: 0018:ffff8801ca33f520 EFLAGS: 00010086 RAX: ffffea0000000000 RBX: 0000000000000282 RCX: 0000000000000000 netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff8801ca33f540 R08: ffffed003b6046d7 R09: ffffed003b6046d6 R10: ffffed003b6046d6 R11: ffff8801db0236b3 R12: 0000000000000282 R13: ffffffff867ded2a R14: ffff8801ca33f690 R15: ffff88018a8f0ec0 FS: 00007ff076c40700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffebe000000008 CR3: 00000001aa200000 CR4: 00000000001406f0 netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000020000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: p9_client_version net/9p/client.c:1010 [inline] p9_client_create+0xfea/0x1770 net/9p/client.c:1070 netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2542 [inline] do_mount+0x581/0x30e0 fs/namespace.c:2872 ksys_mount+0x12d/0x140 fs/namespace.c:3088 __do_sys_mount fs/namespace.c:3102 [inline] __se_sys_mount fs/namespace.c:3099 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3099 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff076c3fc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff076c406d4 RCX: 0000000000457089 RDX: 0000000020000340 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 00000000200001c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d2310 R14: 00000000004c7a36 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: ffffebe000000008 ---[ end trace 91ef65807a9b8737 ]--- RIP: 0010:virt_to_head_page include/linux/mm.h:657 [inline] RIP: 0010:virt_to_cache mm/slab.c:399 [inline] RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809 Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 4c 8b 6a 18 49 63 75 74 RSP: 0018:ffff8801ca33f520 EFLAGS: 00010086 RAX: ffffea0000000000 RBX: 0000000000000282 RCX: 0000000000000000 RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff8801ca33f540 R08: ffffed003b6046d7 R09: ffffed003b6046d6 R10: ffffed003b6046d6 R11: ffff8801db0236b3 R12: 0000000000000282 R13: ffffffff867ded2a R14: ffff8801ca33f690 R15: ffff88018a8f0ec0 FS: 00007ff076c40700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffebe000000008 CR3: 00000001aa200000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000020000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600