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linux/net/sunrpc
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J. Bruce Fields 034dd34ff4 svcrpc: fix oops in absence of krb5 module 
Olga Kornievskaia says: "I ran into this oops in the nfsd (below)
(4.10-rc3 kernel). To trigger this I had a client (unsuccessfully) try
to mount the server with krb5 where the server doesn't have the
rpcsec_gss_krb5 module built."

The problem is that rsci.cred is copied from a svc_cred structure that
gss_proxy didn't properly initialize.  Fix that.

[120408.542387] general protection fault: 0000 [#1] SMP
...
[120408.565724] CPU: 0 PID: 3601 Comm: nfsd Not tainted 4.10.0-rc3+ #16
[120408.567037] Hardware name: VMware, Inc. VMware Virtual =
Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[120408.569225] task: ffff8800776f95c0 task.stack: ffffc90003d58000
[120408.570483] RIP: 0010:gss_mech_put+0xb/0x20 [auth_rpcgss]
...
[120408.584946]  ? rsc_free+0x55/0x90 [auth_rpcgss]
[120408.585901]  gss_proxy_save_rsc+0xb2/0x2a0 [auth_rpcgss]
[120408.587017]  svcauth_gss_proxy_init+0x3cc/0x520 [auth_rpcgss]
[120408.588257]  ? __enqueue_entity+0x6c/0x70
[120408.589101]  svcauth_gss_accept+0x391/0xb90 [auth_rpcgss]
[120408.590212]  ? try_to_wake_up+0x4a/0x360
[120408.591036]  ? wake_up_process+0x15/0x20
[120408.592093]  ? svc_xprt_do_enqueue+0x12e/0x2d0 [sunrpc]
[120408.593177]  svc_authenticate+0xe1/0x100 [sunrpc]
[120408.594168]  svc_process_common+0x203/0x710 [sunrpc]
[120408.595220]  svc_process+0x105/0x1c0 [sunrpc]
[120408.596278]  nfsd+0xe9/0x160 [nfsd]
[120408.597060]  kthread+0x101/0x140
[120408.597734]  ? nfsd_destroy+0x60/0x60 [nfsd]
[120408.598626]  ? kthread_park+0x90/0x90
[120408.599448]  ret_from_fork+0x22/0x30

Fixes: 1d658336b0 "SUNRPC: Add RPC based upcall mechanism for RPCGSS auth"
Cc: stable@vger.kernel.org
Cc: Simo Sorce <simo@redhat.com>
Reported-by: Olga Kornievskaia <kolga@netapp.com>
Tested-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
 		2017-01-31 12:29:24 -05:00
..
auth_gss svcrpc: fix oops in absence of krb5 module 2017-01-31 12:29:24 -05:00
xprtrdma svcrdma: avoid duplicate dma unmapping during error recovery 2017-01-12 16:14:47 -05:00
Kconfig rpcrdma: Merge svcrdma and xprtrdma modules into one 2015-06-04 16:56:02 -04:00
Makefile SUNRPC: Add a structure to track multiple transports 2016-02-05 18:48:54 -05:00
addr.c replace strict_strto calls 2014-07-12 18:45:49 -04:00
auth.c sunrpc: replace generic auth_cred hash with auth-specific function 2016-09-30 15:47:47 -04:00
auth_generic.c NFS client updates for Linux 4.9 2016-10-13 21:28:20 -07:00
auth_null.c sunrpc: move NO_CRKEY_TIMEOUT to the auth->au_flags 2016-07-19 16:23:24 -04:00
auth_unix.c NFS client updates for Linux 4.9 2016-10-13 21:28:20 -07:00
backchannel_rqst.c SUNRPC: Refactor rpc_xdr_buf_init() 2016-09-19 13:08:37 -04:00
cache.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
clnt.c SUNRPC: cleanup ida information when removing sunrpc module 2017-01-24 15:29:24 -05:00
debugfs.c SUNRPC: Address kbuild warning in net/sunrpc/debugfs.c 2015-06-11 14:01:06 -04:00
netns.h netns: make struct pernet_operations::id unsigned int 2016-11-18 10:59:15 -05:00
rpc_pipe.c fs: Replace CURRENT_TIME with current_time() for inode timestamps 2016-09-27 21:06:21 -04:00
rpcb_clnt.c SUNRPC: Use the multipath iterator to assign a transport to each task 2016-02-05 18:48:55 -05:00
sched.c SUNRPC: Separate buffer pointers for RPC Call and Reply messages 2016-09-19 13:08:37 -04:00
socklib.c sunrpc: do not pull udp headers on receive 2016-04-11 15:31:33 -04:00
stats.c SUNRPC: Proper metric accounting when RPC is not transmitted 2016-11-29 16:45:44 -05:00
sunrpc.h SUNRPC: track whether a request is coming from a loop-back interface. 2014-05-22 15:59:18 -04:00
sunrpc_syms.c SUNRPC: cleanup ida information when removing sunrpc module 2017-01-24 15:29:24 -05:00
svc.c svcauth_gss: Close connection when dropping an incoming message 2016-11-30 17:31:11 -05:00
svc_xprt.c sunrpc: don't call sleeping functions from the notifier block callbacks 2017-01-12 15:56:40 -05:00
svcauth.c sunrpc: use DEFINE_SPINLOCK() 2016-12-06 14:18:30 -05:00
svcauth_unix.c cred: simpler, 1D supplementary groups 2016-10-07 18:46:30 -07:00
svcsock.c ktime: Get rid of the union 2016-12-25 17:21:22 +01:00
sysctl.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
timer.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
xdr.c SUNRPC: Fix setting of buffer length in xdr_set_next_buffer() 2016-09-22 17:17:47 -04:00
xprt.c sunrpc: Don't engage exponential backoff when connection attempt is rejected. 2016-12-01 17:40:41 -05:00
xprtmultipath.c SUNRPC search xprt switch for sockaddr 2016-09-19 13:08:36 -04:00
xprtsock.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-11-15 10:54:36 -05:00