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linux/net/smc
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Fabio M. De Francesco 7ff57e98fb net/smc: Use a mutex for locking "struct smc_pnettable" 
smc_pnetid_by_table_ib() uses read_lock() and then it calls smc_pnet_apply_ib()
which, in turn, calls mutex_lock(&smc_ib_devices.mutex).

read_lock() disables preemption. Therefore, the code acquires a mutex while in
atomic context and it leads to a SAC bug.

Fix this bug by replacing the rwlock with a mutex.

Reported-and-tested-by: syzbot+4f322a6d84e991c38775@syzkaller.appspotmail.com
Fixes: 64e28b52c7a6 ("net/smc: add pnet table namespace support")
Confirmed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Link: https://lore.kernel.org/r/20220223100252.22562-1-fmdefrancesco@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-24 09:09:33 -08:00
..
af_smc.c
net/smc: Avoid overwriting the copies of clcsock callback functions
2022-02-11 11:10:29 +00:00
Kconfig
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
Makefile
net/smc: Introduce tracepoint for fallback
2021-11-01 13:39:14 +00:00
smc_cdc.c
net/smc: Introduce a new conn->lgr validity check helper
2022-01-13 13:14:53 +00:00
smc_cdc.h
net/smc: fix kernel panic caused by race of smc_sock
2021-12-28 12:42:45 +00:00
smc_clc.c
net/smc: Introduce a new conn->lgr validity check helper
2022-01-13 13:14:53 +00:00
smc_clc.h
net/smc: add v2 format of CLC decline message
2021-10-16 14:58:13 +01:00
smc_close.c
net/smc: Keep smc_close_final rc during active close
2021-12-02 12:14:36 +00:00
smc_close.h
net/smc: remove close abort worker
2019-10-22 11:23:44 -07:00
smc_core.c
net/smc: Fix hung_task when removing SMC-R devices
2022-01-16 12:30:28 +00:00
smc_core.h
net/smc: Resolve the race between SMC-R link access and clear
2022-01-13 13:14:53 +00:00
smc_diag.c
Partially revert "net/smc: Add netlink net namespace support"
2022-02-02 07:42:41 -08:00
smc_ib.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-12-31 14:35:40 +00:00
smc_ib.h
net/smc: Introduce net namespace support for linkgroup
2022-01-02 12:07:39 +00:00
smc_ism.c
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
smc_ism.h
net/smc: keep static copy of system EID
2021-09-14 12:49:10 +01:00
smc_llc.c
net/smc: Print net namespace in log
2022-01-02 12:07:39 +00:00
smc_llc.h
net/smc: extend LLC layer for SMC-Rv2
2021-10-16 14:58:13 +01:00
smc_netlink.c
net/smc: add generic netlink support for system EID
2021-09-14 12:49:10 +01:00
smc_netlink.h
net/smc: add support for user defined EIDs
2021-09-14 12:49:10 +01:00
smc_netns.h
net/smc: introduce list of pnetids for Ethernet devices
2020-09-28 15:19:03 -07:00
smc_pnet.c
net/smc: Use a mutex for locking "struct smc_pnettable"
2022-02-24 09:09:33 -08:00
smc_pnet.h
net/smc: Use a mutex for locking "struct smc_pnettable"
2022-02-24 09:09:33 -08:00
smc_rx.c
net/smc: Introduce tracepoints for tx and rx msg
2021-11-01 13:39:14 +00:00
smc_rx.h
smc: add support for splice()
2018-05-04 11:45:06 -04:00
smc_stats.c
net/smc: Fix ENODATA tests in smc_nl_get_fback_stats()
2021-06-21 12:16:58 -07:00
smc_stats.h
net/smc: Make SMC statistics network namespace aware
2021-06-16 12:54:02 -07:00
smc_tracepoint.c
net/smc: Introduce tracepoint for smcr link down
2021-11-01 13:39:14 +00:00
smc_tracepoint.h
net/smc: Add net namespace for tracepoints
2022-01-02 12:07:39 +00:00
smc_tx.c
net/smc: Introduce tracepoints for tx and rx msg
2021-11-01 13:39:14 +00:00
smc_tx.h
net/smc: eliminate cursor read and write calls
2018-07-23 10:57:14 -07:00
smc_wr.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-12-30 12:12:12 -08:00
smc_wr.h
net/smc: Remove unused function declaration
2022-01-15 22:57:21 +00:00
smc.h
net/smc: Forward wakeup to smc socket waitqueue after fallback
2022-01-31 11:07:13 +00:00