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linux/fs/nfs
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Mike Snitzer f2060bdc21 nfs/localio: add refcounting for each iocb IO associated with NFS pgio header 
Improve completion handling of as many as 3 IOs associated with each
misaligned DIO by using a atomic_t to track completion of each IO.

Update nfs_local_pgio_done() to use precise atomic_t accounting for
remaining iov_iter (up to 3) associated with each iocb, so that each
NFS LOCALIO pgio header is only released after all IOs have completed.
But also allow early return if/when a short read or write occurs.

Fixes reported BUG: KASAN: slab-use-after-free in nfs_local_call_read:
https://lore.kernel.org/linux-nfs/aPSvi5Yr2lGOh5Jh@dell-per750-06-vm-07.rhts.eng.pek2.redhat.com/

Reported-by: Yongcheng Yang <yoyang@redhat.com>
Fixes: c817248fc8 ("nfs/localio: add proper O_DIRECT support for READ and WRITE")
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
 		2025-11-10 10:32:28 -05:00
..
blocklayout NFS: Update the blocklayout to use xdr_set_scratch_folio() 2025-09-23 13:29:50 -04:00
filelayout NFS: Update the filelayout to use xdr_set_scratch_folio() 2025-09-23 13:29:50 -04:00
flexfilelayout NFSv4/flexfiles: fix to allocate mirror->dss before use 2025-10-13 14:33:00 -04:00
Kconfig nfs: add missing selections of CONFIG_CRC32 2025-04-13 16:39:42 -04:00
Makefile nfs: add LOCALIO support 2024-09-23 15:03:30 -04:00
cache_lib.c
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cache_lib.h
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callback.c SUNRPC: Move the svc_rpcb_cleanup() call sites 2025-09-23 13:28:19 -04:00
callback.h
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callback_proc.c NFS: CB_OFFLOAD can return NFS4ERR_DELAY 2025-01-21 11:34:50 -05:00
callback_xdr.c nfsd: don't use sv_nrthreads in connection limiting calculations. 2025-01-06 09:37:36 -05:00
client.c NFS: Check the TLS certificate fields in nfs_match_client() 2025-11-10 10:32:28 -05:00
delegation.c NFS: use a hash table for delegation lookup 2025-07-22 08:10:41 -04:00
delegation.h NFS: use a hash table for delegation lookup 2025-07-22 08:10:41 -04:00
dir.c NFS Client Updates for Linux 6.18 2025-10-03 14:20:40 -07:00
direct.c nfs: direct: drop useless initializer in nfs_direct_write_completion() 2025-04-27 23:25:44 -04:00
dns_resolve.c
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dns_resolve.h
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export.c NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() 2025-07-22 09:50:56 -04:00
file.c NFS: Enable use of the RWF_DONTCACHE flag on the NFS client 2025-09-23 13:29:50 -04:00
fs_context.c change the calling conventions for vfs_parse_fs_string() 2025-09-04 15:20:51 -04:00
fscache.c netfs: Fix undifferentiation of DIO reads from unbuffered reads 2025-05-23 10:35:03 +02:00
fscache.h netfs: Drop the was_async arg from netfs_read_subreq_terminated() 2024-12-20 22:34:03 +01:00
getroot.c nfs: fix the comment of nfs_get_root 2024-09-23 15:03:13 -04:00
inode.c NFS Client Updates for Linux 6.18 2025-10-03 14:20:40 -07:00
internal.h nfs/localio: add tracepoints for misaligned DIO READ and WRITE support 2025-09-30 16:10:30 -04:00
io.c NFS: Serialise O_DIRECT i/o and truncate() 2025-09-06 16:51:25 -04:00
iostat.h
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localio.c nfs/localio: add refcounting for each iocb IO associated with NFS pgio header 2025-11-10 10:32:28 -05:00
mount_clnt.c NFS: Remove unused function nfs_umount 2025-07-14 15:20:28 -07:00
namespace.c vfs_parse_fs_string() stuff 2025-10-03 10:51:44 -07:00
netns.h nfs: move the nfs4_data_server_cache into struct nfs_net 2025-04-27 23:25:44 -04:00
nfs.h NFS: Implement get_nfs_version() 2024-11-08 14:17:37 -05:00
nfs2super.c
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nfs2xdr.c nfs/localio: add tracepoints for misaligned DIO READ and WRITE support 2025-09-30 16:10:30 -04:00
nfs3_fs.h
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nfs3acl.c nfs: nfs3acl: drop useless assignment in nfs3_get_acl() 2025-04-27 23:25:44 -04:00
nfs3client.c pnfs: Set transport security policy to RPC_XPRTSEC_NONE unless using TLS 2025-11-10 10:32:28 -05:00
nfs3proc.c NFS client updates for Linux 6.15 2025-04-02 17:06:31 -07:00
nfs3super.c
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nfs3xdr.c nfs/localio: add tracepoints for misaligned DIO READ and WRITE support 2025-09-30 16:10:30 -04:00
nfs4_fs.h NFSv4: Remove duplicate lookups, capability probes and fsinfo calls 2025-08-04 09:48:16 -07:00
nfs4client.c pnfs: Set transport security policy to RPC_XPRTSEC_NONE unless using TLS 2025-11-10 10:32:28 -05:00
nfs4file.c NFS: Enable use of the RWF_DONTCACHE flag on the NFS client 2025-09-23 13:29:50 -04:00
nfs4getroot.c NFSv4: Remove duplicate lookups, capability probes and fsinfo calls 2025-08-04 09:48:16 -07:00
nfs4idmap.c rpc_mkpipe_dentry(): saner calling conventions 2025-07-02 22:44:55 -04:00
nfs4idmap.h
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nfs4namespace.c
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nfs4proc.c NFS4: Apply delay_retrans to async operations 2025-10-13 14:33:00 -04:00
nfs4renewd.c fs: replace use of system_wq with system_percpu_wq 2025-09-19 16:15:07 +02:00
nfs4session.c
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nfs4session.h nfs: add missing selections of CONFIG_CRC32 2025-04-13 16:39:42 -04:00
nfs4state.c NFSv4.1: fix mount hang after CREATE_SESSION failure 2025-09-23 13:28:19 -04:00
nfs4super.c do_nfs4_mount(): switch to vfs_parse_fs_string() 2025-09-04 15:20:58 -04:00
nfs4sysctl.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
nfs4trace.c pNFS: Add prepare commit trace to block/scsi layout 2025-07-14 15:20:28 -07:00
nfs4trace.h pNFS: Add prepare commit trace to block/scsi layout 2025-07-14 15:20:28 -07:00
nfs4xdr.c NFS: Update getacl to use xdr_set_scratch_folio() 2025-09-23 13:29:50 -04:00
nfs42.h NFS: Add support for fallocate(FALLOC_FL_ZERO_RANGE) 2025-05-28 17:17:13 -04:00
nfs42proc.c NFS: Update listxattr to use xdr_set_scratch_folio() 2025-09-23 13:29:50 -04:00
nfs42xattr.c mm/list_lru: simplify the list_lru walk callback function 2024-11-11 17:22:26 -08:00
nfs42xdr.c NFS: Update listxattr to use xdr_set_scratch_folio() 2025-09-23 13:29:50 -04:00
nfsroot.c
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nfstrace.c
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nfstrace.h nfs/localio: add tracepoints for misaligned DIO READ and WRITE support 2025-09-30 16:10:30 -04:00
pagelist.c NFS: Fix a race when updating an existing write 2025-08-19 11:16:02 -07:00
pnfs.c NFS: Clean up pnfs_put_layout_hdr()/pnfs_destroy_layout_final() 2025-07-22 08:10:41 -04:00
pnfs.h nfs: don't share pNFS DS connections between net namespaces 2025-04-27 23:25:44 -04:00
pnfs_dev.c
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pnfs_nfs.c pnfs: Fix TLS logic in _nfs4_pnfs_v4_ds_connect() 2025-11-10 10:32:28 -05:00
proc.c nfs: change mkdir inode_operation to return alternate dentry if needed. 2025-03-05 11:52:50 +01:00
read.c fs/nfs/read: fix double-unlock bug in nfs_return_empty_folio() 2025-05-28 17:17:13 -04:00
super.c new helper: set_default_d_op() 2025-06-10 22:21:16 -04:00
symlink.c fs: Pass a folio to page_put_link() 2025-05-15 12:14:29 +02:00
sysctl.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
sysfs.c NFS: add localio to sysfs 2025-05-28 17:17:13 -04:00
sysfs.h
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unlink.c VFS: rename lookup_one_len family to lookup_noperm and remove permission check 2025-04-08 11:24:36 +02:00
write.c NFS: check if suid/sgid was cleared after a write as needed 2025-10-13 14:33:00 -04:00