Kernel panic in "established_get_next" while reading /proc/net/tcp

Solution Unverified - Updated -


  • Kernel panic in "established_get_next" while reading /proc/net/tcp
  • System crash with RIP trace established_get_next+xx detailed backtrace:
Pid: 26803, comm: netstat
RIP: [<ffffffff8149f967>] established_get_next+0x47
Call Trace:
 [<ffffffff8149fd30>] tcp_get_idx+0x90/0xa0
 [<ffffffff8149fd79>] tcp_seq_start+0x39/0x40
 [<ffffffff811a52f6>] seq_read+0x96/0x400
 [<ffffffff811e99ae>] proc_reg_read+0x7e/0xc0
 [<ffffffff81181ac5>] vfs_read+0xb5/0x1a0
 [<ffffffff81181c01>] sys_read+0x51/0x90
 [<ffffffff810dc685>] ? __audit_syscall_exit+0x265/0x290
 [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
RIP  [<ffffffff8149f967>] established_get_next+0x47/0x160


  • Red Hat Enterprise Linux 6
    • 6.10: kernel-2.6.32-754.el6
    • 6.6: kernel-2.6.32-504.16.2.el6
    • 6.4: kernel-2.6.32-358.23.2.el6
  • procfs reader
    • Process such as netstat or cat reading from /proc/net/tcp
    • Long-running process reading system socket state from /proc/PID/net/tcp

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