Attachment 3499 Details for Bug 3304 – OpenSSH client strace output

OpenSSH client strace output

openssh-strace.txt (text/plain), 2.13 KB, created by E B on 2021-04-24 11:20:27 AEST

(hide)

Description:

Filename:

MIME Type:

Creator: E B

Created: 2021-04-24 11:20:27 AEST

Size: 2.13 KB

patch

obsolete

>strace on the client shows that we are closing a channel input file descriptor and then running a select on it shortly after:
>
>13699 shutdown(7, SHUT_WR)              = 0
>13699 close(14)                         = 0
>13699 close(15)                         = 0
>13699 close(7)                          = 0
>13699 shutdown(127, SHUT_WR)            = 0
>13699 close(11)                         = 0    <----------------
>13699 close(13)                         = 0
>13699 close(127)                        = 0
>13699 select(128, [4 5 6 8 9 10 11 12 16 17 19 20 22 23 25 26 28 29 31 32 34 35 37 38 40 41 43 44 46 47 49 50 52 53 55 56 58 59 61 62 63 65 67 68 70 71
> 73 74 76 77 79 81 83 84 85 86 88 89 90 92 93 95 97 98 100 101 103 104 106 109 110 112 115 116 118 120 126], [4 72 75 77 78 87 88 91 102 107 108 111 11
>4 117 126], NULL, {tv_sec=20, tv_usec=0}) = -1 EBADF (Bad file descriptor)
>...
>...
>13699 ioctl(0, TCGETS, 0x7ffc82150070)  = -1 ENOTTY (Inappropriate ioctl for device)
>13699 fcntl(0, F_GETFL)                 = 0x8002 (flags O_RDWR|O_LARGEFILE)
>13699 write(3, "debug3: fd 0 is not O_NONBLOCK\r\n", 32) = 32
>13699 ioctl(1, TCGETS, 0x7ffc82150070)  = -1 ENOTTY (Inappropriate ioctl for device)
>13699 fcntl(1, F_GETFL)                 = 0x8002 (flags O_RDWR|O_LARGEFILE)
>13699 write(3, "debug3: fd 1 is not O_NONBLOCK\r\n", 32) = 32
>13699 ioctl(2, TCGETS, 0x7ffc82150070)  = -1 ENOTTY (Inappropriate ioctl for device)
>13699 fcntl(2, F_GETFL)                 = 0x8002 (flags O_RDWR|O_LARGEFILE)
>13699 write(3, "debug3: fd 2 is not O_NONBLOCK\r\n", 32) = 32
>13699 write(2, "select: Bad file descriptor\r\n", 29) = 29
>13699 clock_gettime(CLOCK_BOOTTIME, {tv_sec=18643, tv_nsec=857620287}) = 0
>13699 write(3, "Transferred: sent 268864, received 259640 bytes, in 36.4 seconds\r\n", 66) = 66
>13699 write(3, "Bytes per second: sent 7386.7, received 7133.2\r\n", 48) = 48
>13699 write(3, "debug1: Exit status -1\r\n", 24) = 24
>13699 close(4)                          = 0
>13699 brk(0x564039dbe000)               = 0x564039dbe000
>13699 unlink("/home/myuser/.ssh/my-bastion.sock") = -1 ENOENT (No such file or directory)
>13699 exit_group(-1)                    = ?
>13699 +++ exited with 255 +++

Actions: View

Attachments on bug 3304: 3499 | 3500 | 3501 | 3502 | 3515 | 3516 | 3517 | 3518