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linux/net/sunrpc/auth_gss
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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.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
gss_generic_token.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
gss_krb5_crypto.c sunrpc: GFP_KERNEL should be GFP_NOFS in crypto code 2016-11-01 15:47:52 -04:00
gss_krb5_keys.c sunrpc: Use skcipher and ahash/shash 2016-01-27 20:36:01 +08:00
gss_krb5_mech.c sunrpc: GFP_KERNEL should be GFP_NOFS in crypto code 2016-11-01 15:47:52 -04:00
gss_krb5_seal.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
gss_krb5_seqnum.c sunrpc: Use skcipher and ahash/shash 2016-01-27 20:36:01 +08:00
gss_krb5_unseal.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
gss_krb5_wrap.c mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
gss_mech_switch.c xprtrdma: No direct data placement with krb5i and krb5p 2016-07-11 15:50:43 -04:00
gss_rpc_upcall.c nfsd4: fix gss-proxy 4.1 mounts for some AD principals 2015-11-24 11:36:31 -07:00
gss_rpc_upcall.h Merge branch 'nfs-for-next' of git://linux-nfs.org/~trondmy/nfs-2.6 into for-3.10 2013-04-29 16:23:34 -04:00
gss_rpc_xdr.c svcrpc: fix oops in absence of krb5 module 2017-01-31 12:29:24 -05:00
gss_rpc_xdr.h sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
Makefile SUNRPC: Add RPC based upcall mechanism for RPCGSS auth 2013-04-26 11:41:27 -04:00
svcauth_gss.c svcrpc: don't leak contexts on PROC_DESTROY 2017-01-12 15:56:14 -05:00