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random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) ====================================================== WARNING: possible circular locking dependency detected 4.17.0-rc2+ #25 Not tainted ------------------------------------------------------ syz-executor037/4509 is trying to acquire lock: (ptrval) (sk_lock-AF_INET){+.+.}, at: lock_sock include/net/sock.h:1469 [inline] (ptrval) (sk_lock-AF_INET){+.+.}, at: tcp_mmap+0x1c7/0x14f0 net/ipv4/tcp.c:1759 but task is already holding lock: (ptrval) (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0x1a1/0x2a0 mm/util.c:355 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_sem){++++}: __might_fault+0x155/0x1e0 mm/memory.c:4555 _copy_from_iter_full+0x2fd/0xd10 lib/iov_iter.c:607 copy_from_iter_full include/linux/uio.h:124 [inline] skb_do_copy_data_nocache include/net/sock.h:1883 [inline] skb_add_data_nocache include/net/sock.h:1894 [inline] tcp_sendmsg_locked+0x2f98/0x3e10 net/ipv4/tcp.c:1316 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1446 inet_sendmsg+0x19f/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 sock_write_iter+0x35a/0x5a0 net/socket.c:908 call_write_iter include/linux/fs.h:1784 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x64d/0x960 fs/read_write.c:487 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 lock_sock_nested+0xd0/0x120 net/core/sock.c:2844 lock_sock include/net/sock.h:1469 [inline] tcp_mmap+0x1c7/0x14f0 net/ipv4/tcp.c:1759 sock_mmap+0x8e/0xc0 net/socket.c:1144 call_mmap include/linux/fs.h:1789 [inline] mmap_region+0xd13/0x1820 mm/mmap.c:1723 do_mmap+0xc79/0x11d0 mm/mmap.c:1494 do_mmap_pgoff include/linux/mm.h:2237 [inline] vm_mmap_pgoff+0x1fb/0x2a0 mm/util.c:357 ksys_mmap_pgoff+0x4c9/0x640 mm/mmap.c:1544 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_sem); lock(sk_lock-AF_INET); lock(&mm->mmap_sem); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor037/4509: #0: (ptrval) (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0x1a1/0x2a0 mm/util.c:355 stack backtrace: CPU: 1 PID: 4509 Comm: syz-executor037 Not tainted 4.17.0-rc2+ #25 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+0x1b9/0x294 lib/dump_stack.c:113 print_circular_bug.isra.36.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1223 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x343e/0x5140 kernel/locking/lockdep.c:3431 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 lock_sock_nested+0xd0/0x120 net/core/sock.c:2844 lock_sock include/net/sock.h:1469 [inline] tcp_mmap+0x1c7/0x14f0 net/ipv4/tcp.c:1759 sock_mmap+0x8e/0xc0 net/socket.c:1144 call_mmap include/linux/fs.h:1789 [inline] mmap_region+0xd13/0x1820 mm/mmap.c:1723 do_mmap+0xc79/0x11d0 mm/mmap.c:1494 do_mmap_pgoff include/linux/mm.h:2237 [inline] vm_mmap_pgoff+0x1fb/0x2a0 mm/util.c:357 ksys_mmap_pgoff+0x4c9/0x640 mm/mmap.c:1544 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x43fcb9 RSP: 002b:00007fffdda24408 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcb9 RDX: 0000080000000000 RSI: 0000000000f50000 RDI: 0000000020000000 RBP: 00000000006ca018 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000004011 R11: 0000000000000216 R12: 00000000004015e0 R13: 0000000000401670 R14: 0000000000000000 R15: 000
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/04/30 02:58 | net-next-old | 589f84fb9574 | bb79c6ab | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/29 14:07 | net-next-old | 9e8d438e8ba4 | d5a5d045 | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/28 16:12 | net-next-old | af201bab50a8 | d5a5d045 | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/28 13:31 | net-next-old | af201bab50a8 | d5a5d045 | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/28 10:39 | net-next-old | af201bab50a8 | d5a5d045 | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/28 08:25 | net-next-old | af201bab50a8 | d5a5d045 | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/28 02:53 | net-next-old | af201bab50a8 | d5a5d045 | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/27 17:50 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | syz | C | ci-upstream-net-kasan-gce | |||
2018/04/27 17:41 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:40 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:38 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:36 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:35 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:30 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:30 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:20 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:17 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:16 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:12 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:09 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:08 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:04 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 17:00 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:59 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:52 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:48 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:47 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:47 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:43 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:39 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:39 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:30 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:26 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:25 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:22 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:09 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 16:06 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 15:36 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 15:28 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 15:27 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 15:23 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 15:19 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 14:43 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 14:32 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 14:19 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 14:18 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 14:14 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce | |||||
2018/04/27 14:01 | net-next-old | 79741a38b4a2 | 7785e404 | .config | console log | report | ci-upstream-net-kasan-gce |