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d5b078163e
freebsd-dev/sys
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Konstantin Belousov d5b078163e null_bypass(): prevent loosing the only reference to the lower vnode 
The upper vnode reference to the lower vnode is the only reference that
keeps our pointer to the lower vnode alive. If lower vnode is relocked
during the VOP call, upper vnode might become unlocked and reclaimed,
which invalidates our reference.

Add a transient vhold around VOP call.

Reported and tested by:	pho
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31310
2021-07-27 19:58:47 +03:00
..
amd64 linux: implement sigaltstack(2) on arm64 2021-07-27 13:34:49 +00:00
arm allwinner: rsb: Set the PMIC to RSB mode 2021-07-24 17:46:25 +02:00
arm64 linux: implement sigaltstack(2) on arm64 2021-07-27 13:34:49 +00:00
bsm
cam cam: clear stack-allocated CCB in the target layer 2021-07-21 10:18:28 +01:00
cddl
compat LinuxKPI: add sign_extend32() 2021-07-27 15:03:38 +00:00
conf pf: fix LINT build 2021-07-20 18:08:30 +02:00
contrib ena: Remove redundant declaration of ena_log_level. 2021-07-23 16:07:35 -07:00
crypto crypto: Constify all transform descriptors 2021-07-26 16:41:05 -04:00
ddb
dev /dev/pci: clarify meaning of writeable file descriptor 2021-07-27 12:13:43 +03:00
dts arm64: allwinner: dtbo: Add dtb overlays to disable mmc node 2021-07-24 22:53:33 +02:00
fs null_bypass(): prevent loosing the only reference to the lower vnode 2021-07-27 19:58:47 +03:00
gdb
geom geom_disk: use a preallocated geom_event for disk destruction. 2021-07-23 18:08:52 -06:00
gnu
i386 linux: implement sigaltstack(2) on arm64 2021-07-27 13:34:49 +00:00
isa newbus: Move from bus_child_{pnpinfo,location}_src to bus_child_{pnpinfo,location} with sbuf 2021-06-22 20:52:06 -06:00
kern m_dup: Handle unmapped mbufs as an input mbuf. 2021-07-26 14:09:16 -07:00
kgssapi
libkern Switch to an ifunc in the kernel for crc32c 2021-07-22 20:54:21 +00:00
mips Pass the syscall number to capsicum permission-denied signals 2021-07-16 18:06:44 +01:00
modules linux(4): Fix amd64 gcc build. 2021-07-26 22:28:21 +03:00
net vlan: deduplicate bpf_setpcp() and pf_ieee8021q_setpcp() 2021-07-26 23:13:31 +02:00
net80211 net80211: ieee80211_probereq_ie fix length calculation for hw scans 2021-06-28 12:17:11 +00:00
netgraph Consistently use the SOLISTENING() macro 2021-06-14 17:32:27 -04:00
netinet netdump: Fix leaking debugnet state on errors. 2021-07-27 09:06:23 -07:00
netinet6 sctp: Fix errno in case of association setup failures 2021-07-09 23:19:25 +02:00
netipsec ipsec: globalize lft zone and zero out buffers at allocation time 2021-06-28 08:14:26 +00:00
netpfil vlan: deduplicate bpf_setpcp() and pf_ieee8021q_setpcp() 2021-07-26 23:13:31 +02:00
netsmb netsmb: Avoid a read-after-free in smb_t2_request_int() 2021-05-26 10:45:40 -04:00
nfs
nfsclient
nfsserver
nlm
ofed Fix LINT kernel build issues after c3987b8ea7 . 2021-07-12 18:00:30 +02:00
opencrypto crypto: Constify all transform descriptors 2021-07-26 16:41:05 -04:00
powerpc powerpc64: add Power8 and Power9 PMCs 2021-07-26 10:27:23 -03:00
riscv riscv: Fix pmap_kextract racing with concurrent superpage promotion/demotion 2021-07-22 20:02:14 +01:00
rpc Consistently use the SOLISTENING() macro 2021-06-14 17:32:27 -04:00
security mac: cheaper check for ifnet_create_mbuf and ifnet_check_transmit 2021-06-29 15:06:45 +02:00
sys VFS: remove MNTK_MARKER 2021-07-24 12:52:32 -07:00
teken
tests tests: Revise FIB lookups per second benchmarking routines 2021-06-17 08:49:09 +02:00
tools
ufs FFS: remove ffs_fsfail_task 2021-07-24 12:52:41 -07:00
vm redzone: Raise a compile error if KASAN is configured 2021-07-23 10:47:13 -04:00
x86 Annotate amd64 stack unwinders with __nomemorysanitize 2021-07-23 10:47:13 -04:00
xdr
xen
Makefile