* [PATCH] NFSv4: fix a reference leak caused WARNING messages
[not found] <854569e6-d545-ec2f-ca32-d65b50c1d603@gmail.com>
@ 2017-03-06 14:29 ` Kinglong Mee
2017-03-07 1:21 ` Trond Myklebust
0 siblings, 1 reply; 3+ messages in thread
From: Kinglong Mee @ 2017-03-06 14:29 UTC (permalink / raw)
To: Trond Myklebust, linux-nfs@vger.kernel.org; +Cc: Anna Schumaker, Kinglong Mee
Because nfs4_opendata_access() has close the state when access is denied,
so the state isn't leak.
Rather than revert the commit a974deee47, I'd like clean the strange state close.
[ 1615.094218] ------------[ cut here ]------------
[ 1615.094607] WARNING: CPU: 0 PID: 23702 at lib/list_debug.c:31 __list_add_valid+0x8e/0xa0
[ 1615.094913] list_add double add: new=ffff9d7901d9f608, prev=ffff9d7901d9f608, next=ffff9d7901ee8dd0.
[ 1615.095458] Modules linked in: nfsv4(E) nfs(E) nfsd(E) tun bridge stp llc fuse ip_set nfnetlink vmw_vsock_vmci_transport vsock f2fs snd_seq_midi snd_seq_midi_event fscrypto coretemp ppdev crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_rapl_perf vmw_balloon snd_ens1371 joydev gameport snd_ac97_codec ac97_bus snd_seq snd_pcm snd_rawmidi snd_timer snd_seq_device snd soundcore nfit parport_pc parport acpi_cpufreq tpm_tis tpm_tis_core tpm i2c_piix4 vmw_vmci shpchp auth_rpcgss nfs_acl lockd(E) grace sunrpc(E) xfs libcrc32c vmwgfx drm_kms_helper ttm drm crc32c_intel mptspi e1000 serio_raw scsi_transport_spi mptscsih mptbase ata_generic pata_acpi fjes [last unloaded: nfs]
[ 1615.097663] CPU: 0 PID: 23702 Comm: fstest Tainted: G W E 4.11.0-rc1+ #517
[ 1615.098015] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 1615.098807] Call Trace:
[ 1615.099183] dump_stack+0x63/0x86
[ 1615.099578] __warn+0xcb/0xf0
[ 1615.099967] warn_slowpath_fmt+0x5f/0x80
[ 1615.100370] __list_add_valid+0x8e/0xa0
[ 1615.100760] nfs4_put_state_owner+0x75/0xc0 [nfsv4]
[ 1615.101136] __nfs4_close+0x109/0x140 [nfsv4]
[ 1615.101524] nfs4_close_state+0x15/0x20 [nfsv4]
[ 1615.101949] nfs4_close_context+0x21/0x30 [nfsv4]
[ 1615.102691] __put_nfs_open_context+0xb8/0x110 [nfs]
[ 1615.103155] put_nfs_open_context+0x10/0x20 [nfs]
[ 1615.103586] nfs4_file_open+0x13b/0x260 [nfsv4]
[ 1615.103978] do_dentry_open+0x20a/0x2f0
[ 1615.104369] ? nfs4_copy_file_range+0x30/0x30 [nfsv4]
[ 1615.104739] vfs_open+0x4c/0x70
[ 1615.105106] ? may_open+0x5a/0x100
[ 1615.105469] path_openat+0x623/0x1420
[ 1615.105823] do_filp_open+0x91/0x100
[ 1615.106174] ? __alloc_fd+0x3f/0x170
[ 1615.106568] do_sys_open+0x130/0x220
[ 1615.106920] ? __put_cred+0x3d/0x50
[ 1615.107256] SyS_open+0x1e/0x20
[ 1615.107588] entry_SYSCALL_64_fastpath+0x1a/0xa9
[ 1615.107922] RIP: 0033:0x7fab599069b0
[ 1615.108247] RSP: 002b:00007ffcf0600d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
[ 1615.108575] RAX: ffffffffffffffda RBX: 00007fab59bcfae0 RCX: 00007fab599069b0
[ 1615.108896] RDX: 0000000000000200 RSI: 0000000000000200 RDI: 00007ffcf060255e
[ 1615.109211] RBP: 0000000000040010 R08: 0000000000000000 R09: 0000000000000016
[ 1615.109515] R10: 00000000000006a1 R11: 0000000000000246 R12: 0000000000041000
[ 1615.109806] R13: 0000000000040010 R14: 0000000000001000 R15: 0000000000002710
[ 1615.110152] ---[ end trace 96ed63b1306bf2f3 ]---
Fixes: a974deee47 ("NFSv4: Fix memory and state leak in...")
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
fs/nfs/nfs4proc.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1b18368..c1f5369 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2258,8 +2258,6 @@ static int nfs4_opendata_access(struct rpc_cred *cred,
if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
return 0;
- /* even though OPEN succeeded, access is denied. Close the file */
- nfs4_close_state(state, fmode);
return -EACCES;
}
--
2.9.3
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] NFSv4: fix a reference leak caused WARNING messages
2017-03-06 14:29 ` [PATCH] NFSv4: fix a reference leak caused WARNING messages Kinglong Mee
@ 2017-03-07 1:21 ` Trond Myklebust
0 siblings, 0 replies; 3+ messages in thread
From: Trond Myklebust @ 2017-03-07 1:21 UTC (permalink / raw)
To: kinglongmee@gmail.com, linux-nfs@vger.kernel.org
Cc: Anna.Schumaker@netapp.com
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^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH] NFSv4: fix a reference leak caused WARNING messages
2017-06-28 14:47 [PATCH] Stable request to fix a reference leak and list corruption Trond Myklebust
@ 2017-06-28 14:47 ` Trond Myklebust
0 siblings, 0 replies; 3+ messages in thread
From: Trond Myklebust @ 2017-06-28 14:47 UTC (permalink / raw)
To: stable; +Cc: Kinglong Mee, Anna Schumaker, linux-nfs
From: Kinglong Mee <kinglongmee@gmail.com>
commit 366a1569bff3fe14abfdf9285e31e05e091745f5 upstream.
Because nfs4_opendata_access() has close the state when access is denied,
so the state isn't leak.
Rather than revert the commit a974deee47, I'd like clean the strange state close.
[ 1615.094218] ------------[ cut here ]------------
[ 1615.094607] WARNING: CPU: 0 PID: 23702 at lib/list_debug.c:31 __list_add_valid+0x8e/0xa0
[ 1615.094913] list_add double add: new=ffff9d7901d9f608, prev=ffff9d7901d9f608, next=ffff9d7901ee8dd0.
[ 1615.095458] Modules linked in: nfsv4(E) nfs(E) nfsd(E) tun bridge stp llc fuse ip_set nfnetlink vmw_vsock_vmci_transport vsock f2fs snd_seq_midi snd_seq_midi_event fscrypto coretemp ppdev crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_rapl_perf vmw_balloon snd_ens1371 joydev gameport snd_ac97_codec ac97_bus snd_seq snd_pcm snd_rawmidi snd_timer snd_seq_device snd soundcore nfit parport_pc parport acpi_cpufreq tpm_tis tpm_tis_core tpm i2c_piix4 vmw_vmci shpchp auth_rpcgss nfs_acl lockd(E) grace sunrpc(E) xfs libcrc32c vmwgfx drm_kms_helper ttm drm crc32c_intel mptspi e1000 serio_raw scsi_transport_spi mptscsih mptbase ata_generic pata_acpi fjes [last unloaded: nfs]
[ 1615.097663] CPU: 0 PID: 23702 Comm: fstest Tainted: G W E 4.11.0-rc1+ #517
[ 1615.098015] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 1615.098807] Call Trace:
[ 1615.099183] dump_stack+0x63/0x86
[ 1615.099578] __warn+0xcb/0xf0
[ 1615.099967] warn_slowpath_fmt+0x5f/0x80
[ 1615.100370] __list_add_valid+0x8e/0xa0
[ 1615.100760] nfs4_put_state_owner+0x75/0xc0 [nfsv4]
[ 1615.101136] __nfs4_close+0x109/0x140 [nfsv4]
[ 1615.101524] nfs4_close_state+0x15/0x20 [nfsv4]
[ 1615.101949] nfs4_close_context+0x21/0x30 [nfsv4]
[ 1615.102691] __put_nfs_open_context+0xb8/0x110 [nfs]
[ 1615.103155] put_nfs_open_context+0x10/0x20 [nfs]
[ 1615.103586] nfs4_file_open+0x13b/0x260 [nfsv4]
[ 1615.103978] do_dentry_open+0x20a/0x2f0
[ 1615.104369] ? nfs4_copy_file_range+0x30/0x30 [nfsv4]
[ 1615.104739] vfs_open+0x4c/0x70
[ 1615.105106] ? may_open+0x5a/0x100
[ 1615.105469] path_openat+0x623/0x1420
[ 1615.105823] do_filp_open+0x91/0x100
[ 1615.106174] ? __alloc_fd+0x3f/0x170
[ 1615.106568] do_sys_open+0x130/0x220
[ 1615.106920] ? __put_cred+0x3d/0x50
[ 1615.107256] SyS_open+0x1e/0x20
[ 1615.107588] entry_SYSCALL_64_fastpath+0x1a/0xa9
[ 1615.107922] RIP: 0033:0x7fab599069b0
[ 1615.108247] RSP: 002b:00007ffcf0600d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
[ 1615.108575] RAX: ffffffffffffffda RBX: 00007fab59bcfae0 RCX: 00007fab599069b0
[ 1615.108896] RDX: 0000000000000200 RSI: 0000000000000200 RDI: 00007ffcf060255e
[ 1615.109211] RBP: 0000000000040010 R08: 0000000000000000 R09: 0000000000000016
[ 1615.109515] R10: 00000000000006a1 R11: 0000000000000246 R12: 0000000000041000
[ 1615.109806] R13: 0000000000040010 R14: 0000000000001000 R15: 0000000000002710
[ 1615.110152] ---[ end trace 96ed63b1306bf2f3 ]---
Fixes: a974deee47 ("NFSv4: Fix memory and state leak in...")
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
fs/nfs/nfs4proc.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1b183686c6d4..c1f5369cd339 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2258,8 +2258,6 @@ static int nfs4_opendata_access(struct rpc_cred *cred,
if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
return 0;
- /* even though OPEN succeeded, access is denied. Close the file */
- nfs4_close_state(state, fmode);
return -EACCES;
}
--
2.9.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-06-28 14:48 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <854569e6-d545-ec2f-ca32-d65b50c1d603@gmail.com>
2017-03-06 14:29 ` [PATCH] NFSv4: fix a reference leak caused WARNING messages Kinglong Mee
2017-03-07 1:21 ` Trond Myklebust
2017-06-28 14:47 [PATCH] Stable request to fix a reference leak and list corruption Trond Myklebust
2017-06-28 14:47 ` [PATCH] NFSv4: fix a reference leak caused WARNING messages Trond Myklebust
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