Revision 580e4273d7a883ececfefa692c1f96bdbacb99b5 authored by Cong Wang on 02 October 2020, 19:13:34 UTC, committed by David S. Miller on 04 October 2020, 21:53:06 UTC
Although we take RTNL on dump path, it is possible to
skip RTNL on insertion path. So the following race condition
is possible:
rtnl_lock() // no rtnl lock
mutex_lock(&idrinfo->lock);
// insert ERR_PTR(-EBUSY)
mutex_unlock(&idrinfo->lock);
tc_dump_action()
rtnl_unlock()
So we have to skip those temporary -EBUSY entries on dump path
too.
Reported-and-tested-by: syzbot+b47bc4f247856fb4d9e1@syzkaller.appspotmail.com
Fixes: 0fedc63fadf0 ("net_sched: commit action insertions together")
Cc: Vlad Buslov <vladbu@mellanox.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 9a9e774
| File | Mode | Size |
|---|---|---|
| aoe | ||
| drbd | ||
| mtip32xx | ||
| paride | ||
| rnbd | ||
| rsxx | ||
| xen-blkback | ||
| zram | ||
| Kconfig | -rw-r--r-- | 15.8 KB |
| Makefile | -rw-r--r-- | 1.5 KB |
| amiflop.c | -rw-r--r-- | 50.0 KB |
| ataflop.c | -rw-r--r-- | 54.6 KB |
| brd.c | -rw-r--r-- | 13.3 KB |
| cryptoloop.c | -rw-r--r-- | 4.3 KB |
| floppy.c | -rw-r--r-- | 135.8 KB |
| loop.c | -rw-r--r-- | 59.6 KB |
| loop.h | -rw-r--r-- | 2.3 KB |
| nbd.c | -rw-r--r-- | 61.1 KB |
| null_blk.h | -rw-r--r-- | 3.9 KB |
| null_blk_main.c | -rw-r--r-- | 47.4 KB |
| null_blk_trace.c | -rw-r--r-- | 464 bytes |
| null_blk_trace.h | -rw-r--r-- | 2.0 KB |
| null_blk_zoned.c | -rw-r--r-- | 7.5 KB |
| pktcdvd.c | -rw-r--r-- | 72.4 KB |
| ps3disk.c | -rw-r--r-- | 13.5 KB |
| ps3vram.c | -rw-r--r-- | 22.0 KB |
| rbd.c | -rw-r--r-- | 185.0 KB |
| rbd_types.h | -rw-r--r-- | 2.5 KB |
| skd_main.c | -rw-r--r-- | 93.2 KB |
| skd_s1120.h | -rw-r--r-- | 9.3 KB |
| sunvdc.c | -rw-r--r-- | 28.7 KB |
| swim.c | -rw-r--r-- | 20.2 KB |
| swim3.c | -rw-r--r-- | 31.3 KB |
| swim_asm.S | -rw-r--r-- | 4.4 KB |
| sx8.c | -rw-r--r-- | 37.2 KB |
| umem.c | -rw-r--r-- | 29.7 KB |
| umem.h | -rw-r--r-- | 3.6 KB |
| virtio_blk.c | -rw-r--r-- | 25.8 KB |
| xen-blkfront.c | -rw-r--r-- | 73.6 KB |
| xsysace.c | -rw-r--r-- | 33.4 KB |
| z2ram.c | -rw-r--r-- | 9.5 KB |
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