Date: Sat, 18 Nov 2000 13:01:05 -0800 (PST) From: Matt Dillon <dillon@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_descrip.c kern_event.c kern_random.c sys_generic.c sys_pipe.c uipc_syscalls.c vfs_aio.c vfs_syscalls.c src/sys/nfs nfs_syscalls.c src/sys/svr4 svr4_signal.c src/sys/sys filedesc.h socketvar.h src/sys/vm swap_pager.c vm_mmap.c Message-ID: <200011182101.NAA26312@freefall.freebsd.org>
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dillon 2000/11/18 13:01:05 PST
Modified files:
sys/kern kern_descrip.c kern_event.c kern_random.c
sys_generic.c sys_pipe.c uipc_syscalls.c
vfs_aio.c vfs_syscalls.c
sys/nfs nfs_syscalls.c
sys/svr4 svr4_signal.c
sys/sys filedesc.h socketvar.h
sys/vm swap_pager.c vm_mmap.c
Log:
This patchset fixes a large number of file descriptor race conditions.
Pre-rfork code assumed inherent locking of a process's file descriptor
array. However, with the advent of rfork() the file descriptor table
could be shared between processes. This patch closes over a dozen
serious race conditions related to one thread manipulating the table
(e.g. closing or dup()ing a descriptor) while another is blocked in
an open(), close(), fcntl(), read(), write(), etc...
PR: kern/11629
Discussed with: Alexander Viro <viro@math.psu.edu>
Revision Changes Path
1.94 +239 -90 src/sys/kern/kern_descrip.c
1.17 +29 -12 src/sys/kern/kern_event.c
1.39 +7 -4 src/sys/kern/Attic/kern_random.c
1.64 +61 -27 src/sys/kern/sys_generic.c
1.67 +8 -3 src/sys/kern/sys_pipe.c
1.77 +152 -67 src/sys/kern/uipc_syscalls.c
1.86 +33 -6 src/sys/kern/vfs_aio.c
1.172 +76 -11 src/sys/kern/vfs_syscalls.c
1.62 +6 -3 src/sys/nfs/nfs_syscalls.c
1.11 +3 -3 src/sys/svr4/Attic/svr4_signal.c
1.26 +5 -3 src/sys/sys/filedesc.h
1.53 +2 -2 src/sys/sys/socketvar.h
1.146 +5 -3 src/sys/vm/swap_pager.c
1.117 +38 -16 src/sys/vm/vm_mmap.c
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