random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1340 in_atomic(): 0, irqs_disabled(): 1, pid: 4465, name: syz-executor885 INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] (null) hardirqs last disabled at (0): [] copy_process.part.41+0x18cb/0x7340 kernel/fork.c:1752 softirqs last enabled at (0): [] copy_process.part.41+0x196c/0x7340 kernel/fork.c:1755 softirqs last disabled at (0): [<0000000000000000>] (null) CPU: 0 PID: 4465 Comm: syz-executor885 Not tainted 4.18.0-rc4-next-20180710+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 ___might_sleep.cold.86+0x11f/0x13a kernel/sched/core.c:6187 __might_sleep+0x95/0x190 kernel/sched/core.c:6140 __do_page_fault+0x3b6/0xe50 arch/x86/mm/fault.c:1340 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0010:virt_to_cache mm/slab.c:400 [inline] RIP: 0010:kfree+0xb2/0x260 mm/slab.c:3809 Code: 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 e8 e5 be a3 ff 49 63 75 74 48 89 df e8 79 83 a9 01 4c RSP: 0018:ffff8801ac8a75d0 EFLAGS: 00010046 RAX: ffffea000022f848 RBX: ffffffff88be17dc RCX: ffffea000022f847 RDX: ffffea000022f840 RSI: ffffffff876ff2e9 RDI: ffffffff88be17dc RBP: ffff8801ac8a75f0 R08: ffff8801af3106c0 R09: ffffed0035914df8 R10: ffffed0035902a1b R11: 0000000000000001 R12: 0000000000000282 R13: 0000000000000000 R14: ffff8801ac8a7740 R15: ffff8801acf98380 p9_client_version net/9p/client.c:1009 [inline] p9_client_create+0xf43/0x16c9 net/9p/client.c:1069 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 legacy_get_tree+0x118/0x440 fs/fs_context.c:659 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743 do_new_mount fs/namespace.c:2567 [inline] do_mount+0x6c1/0x1fb0 fs/namespace.c:2889 ksys_mount+0x12d/0x140 fs/namespace.c:3105 __do_sys_mount fs/namespace.c:3119 [inline] __se_sys_mount fs/namespace.c:3116 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4401d9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcf98da5c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 RDX: 00000000200002c0 RSI: 00000000200001c0 RDI: 0000000000000000 RBP: 00000000006ca018 R08: 00000000200003c0 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401a60 R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 BUG: unable to handle kernel NULL pointer dereference at 0000000000000074 PGD 1b32e1067 P4D 1b32e1067 PUD 1ba072067 PMD 0 Oops: 0000 [#1] SMP KASAN CPU: 0 PID: 4465 Comm: syz-executor885 Tainted: G W 4.18.0-rc4-next-20180710+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:virt_to_cache mm/slab.c:400 [inline] RIP: 0010:kfree+0xb2/0x260 mm/slab.c:3809 Code: 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 e8 e5 be a3 ff 49 63 75 74 48 89 df e8 79 83 a9 01 4c RSP: 0018:ffff8801ac8a75d0 EFLAGS: 00010046 RAX: ffffea000022f848 RBX: ffffffff88be17dc RCX: ffffea000022f847 RDX: ffffea000022f840 RSI: ffffffff876ff2e9 RDI: ffffffff88be17dc RBP: ffff8801ac8a75f0 R08: ffff8801af3106c0 R09: ffffed0035914df8 R10: ffffed0035902a1b R11: 0000000000000001 R12: 0000000000000282 R13: 0000000000000000 R14: ffff8801ac8a7740 R15: ffff8801acf98380 FS: 0000000002408880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000074 CR3: 00000001cfe84000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: p9_client_version net/9p/client.c:1009 [inline] p9_client_create+0xf43/0x16c9 net/9p/client.c:1069 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 legacy_get_tree+0x118/0x440 fs/fs_context.c:659 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743 do_new_mount fs/namespace.c:2567 [inline] do_mount+0x6c1/0x1fb0 fs/namespace.c:2889 ksys_mount+0x12d/0x140 fs/namespace.c:3105 __do_sys_mount fs/namespace.c:3119 [inline] __se_sys_mount fs/namespace.c:3116 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4401d9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcf98da5c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 RDX: 00000000200002c0 RSI: 00000000200001c0 RDI: 0000000000000000 RBP: 00000000006ca018 R08: 00000000200003c0 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401a60 R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: 0000000000000074 ---[ end trace 2c25e18c27daec6b ]--- RIP: 0010:virt_to_cache mm/slab.c:400 [inline] RIP: 0010:kfree+0xb2/0x260 mm/slab.c:3809 Code: 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 e8 e5 be a3 ff 49 63 75 74 48 89 df e8 79 83 a9 01 4c RSP: 0018:ffff8801ac8a75d0 EFLAGS: 00010046 RAX: ffffea000022f848 RBX: ffffffff88be17dc RCX: ffffea000022f847 RDX: ffffea000022f840 RSI: ffffffff876ff2e9 RDI: ffffffff88be17dc RBP: ffff8801ac8a75f0 R08: ffff8801af3106c0 R09: ffffed0035914df8 R10: ffffed0035902a1b R11: 0000000000000001 R12: 0000000000000282 R13: 0000000000000000 R14: ffff8801ac8a7740 R15: ffff8801acf98380 FS: 0000000002408880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000074 CR3: 00000001cfe84000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400