https://github.com/torvalds/linux
Revision 1d2a6a5e4bf2921531071fcff8538623dce74efa authored by Stanislaw Gruszka on 22 March 2017, 15:08:33 UTC, committed by David S. Miller on 22 March 2017, 22:38:43 UTC
Commit 2ae0f17df1cd ("genetlink: use idr to track families") replaced
if (++n < fams_to_skip)
continue;
into:
if (n++ < fams_to_skip)
continue;
This subtle change cause that on retry ctrl_dumpfamily() call we omit
one family that failed to do ctrl_fill_info() on previous call, because
cb->args[0] = n number counts also family that failed to do
ctrl_fill_info().
Patch fixes the problem and avoid confusion in the future just decrease
n counter when ctrl_fill_info() fail.
User visible problem caused by this bug is failure to get access to
some genetlink family i.e. nl80211. However problem is reproducible
only if number of registered genetlink families is big enough to
cause second call of ctrl_dumpfamily().
Cc: Xose Vazquez Perez <xose.vazquez@gmail.com>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Johannes Berg <johannes@sipsolutions.net>
Fixes: 2ae0f17df1cd ("genetlink: use idr to track families")
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent a97e50c
Tip revision: 1d2a6a5e4bf2921531071fcff8538623dce74efa authored by Stanislaw Gruszka on 22 March 2017, 15:08:33 UTC
genetlink: fix counting regression on ctrl_dumpfamily()
genetlink: fix counting regression on ctrl_dumpfamily()
Tip revision: 1d2a6a5
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| arch | ||
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| crypto | ||
| drivers | ||
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| include | ||
| init | ||
| ipc | ||
| kernel | ||
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| net | ||
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| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.3 KB |
| .mailmap | -rw-r--r-- | 7.7 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 96.0 KB |
| Kbuild | -rw-r--r-- | 2.8 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 389.0 KB |
| Makefile | -rw-r--r-- | 57.7 KB |
| README | -rw-r--r-- | 722 bytes |
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