bisecting fixing commit since 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 building syzkaller on abf9ba4fc75d9b29af15625d44dcfc1360fad3b7 testing commit 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 with gcc (GCC) 8.1.0 kernel signature: f32292a711c7189d5bdc9f11683d3ba75ac7c48a4c081b8438ec56fd2f5577a3 run #0: crashed: general protection fault in locks_remove_file run #1: crashed: general protection fault in locks_remove_file run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK testing current HEAD bae31eef2a167ef160ab2703b6a2f5bbecd98d92 testing commit bae31eef2a167ef160ab2703b6a2f5bbecd98d92 with gcc (GCC) 8.1.0 kernel signature: f8b2c4920a98f7fa7674a0646cc4d7af49a855d16020e063d794c5db4e2244a0 all runs: OK # git bisect start bae31eef2a167ef160ab2703b6a2f5bbecd98d92 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 Bisecting: 169 revisions left to test after this (roughly 7 steps) [293036a0ea49b63a2dc449d41b6f81b3194fffeb] ehci-hcd: Move include to keep CRC stable testing commit 293036a0ea49b63a2dc449d41b6f81b3194fffeb with gcc (GCC) 8.1.0 kernel signature: 14d33d00405fa73c0ba1bd053d0c504f2a5f50ed053b520c2cbf25699225b705 all runs: OK # git bisect bad 293036a0ea49b63a2dc449d41b6f81b3194fffeb Bisecting: 84 revisions left to test after this (roughly 6 steps) [7290cb1a3aa67dcc43fecf66dae64eb2ebad18af] ARM: dts: BCM5301X: Fixed QSPI compatible string testing commit 7290cb1a3aa67dcc43fecf66dae64eb2ebad18af with gcc (GCC) 8.1.0 kernel signature: 58fd91ad04ea311b568b2f97cc72952ee22e2ec485a11f83e02eb6a5a5e7eede all runs: OK # git bisect bad 7290cb1a3aa67dcc43fecf66dae64eb2ebad18af Bisecting: 42 revisions left to test after this (roughly 5 steps) [6aa022755fa184cde7c1af02f45357d7f483b1f7] uaccess: Add non-pagefault user-space write function testing commit 6aa022755fa184cde7c1af02f45357d7f483b1f7 with gcc (GCC) 8.1.0 kernel signature: 33448014f461b0a4425bcc7cb61e9867159e7522ac75fd4071c695cc92c52411 all runs: OK # git bisect bad 6aa022755fa184cde7c1af02f45357d7f483b1f7 Bisecting: 20 revisions left to test after this (roughly 4 steps) [9de4fede0b351128162d4e3612b33e34352a66a5] net: hns: Fix memleak in hns_nic_dev_probe testing commit 9de4fede0b351128162d4e3612b33e34352a66a5 with gcc (GCC) 8.1.0 kernel signature: 3ad30cd21697cdb9a5dc1b77a95b4b11d434e5ad7d251155afcad48c03b44894 run #0: OK run #1: crashed: WARNING: ODEBUG bug in exit_to_usermode_loop run #2: crashed: KASAN: use-after-free Read in snd_pcm_oss_release_file run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect good 9de4fede0b351128162d4e3612b33e34352a66a5 Bisecting: 10 revisions left to test after this (roughly 3 steps) [cfb5e057b7179767d6f3cef3381633417e4e3afb] net: ethernet: mlx4: Fix memory allocation in mlx4_buddy_init() testing commit cfb5e057b7179767d6f3cef3381633417e4e3afb with gcc (GCC) 8.1.0 kernel signature: 7cae0bf82214bb47f7700300d0edb5e0fae01810f962c5f98daa74a62314a112 run #0: crashed: WARNING: ODEBUG bug in exit_to_usermode_loop run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect good cfb5e057b7179767d6f3cef3381633417e4e3afb Bisecting: 5 revisions left to test after this (roughly 3 steps) [5ace0847122fb22f18a20fb7809339cb3d789f01] include/linux/log2.h: add missing () around n in roundup_pow_of_two() testing commit 5ace0847122fb22f18a20fb7809339cb3d789f01 with gcc (GCC) 8.1.0 kernel signature: 54af7db814684e618690afbeada51eeee01d7184f654be54ff6df467f2e58200 all runs: OK # git bisect bad 5ace0847122fb22f18a20fb7809339cb3d789f01 Bisecting: 2 revisions left to test after this (roughly 1 step) [751deef5de35a497a3ea007e0953889ba1123a97] tg3: Fix soft lockup when tg3_reset_task() fails. testing commit 751deef5de35a497a3ea007e0953889ba1123a97 with gcc (GCC) 8.1.0 kernel signature: 76b87bc4c94130eff6494422ab36d7ac42782914fa0c5bfa120aea8b31d10974 all runs: OK # git bisect bad 751deef5de35a497a3ea007e0953889ba1123a97 Bisecting: 0 revisions left to test after this (roughly 0 steps) [c5c6e00f6cc5d3ed0d6464b14e33f2f5c8505888] fix regression in "epoll: Keep a reference on files added to the check list" testing commit c5c6e00f6cc5d3ed0d6464b14e33f2f5c8505888 with gcc (GCC) 8.1.0 kernel signature: d3d39d7952cb4dba54a9d812e1d2582919a60ebe5cd06c282a1c9a68809d0a12 all runs: OK # git bisect bad c5c6e00f6cc5d3ed0d6464b14e33f2f5c8505888 c5c6e00f6cc5d3ed0d6464b14e33f2f5c8505888 is the first bad commit commit c5c6e00f6cc5d3ed0d6464b14e33f2f5c8505888 Author: Al Viro Date: Wed Sep 2 11:30:48 2020 -0400 fix regression in "epoll: Keep a reference on files added to the check list" [ Upstream commit 77f4689de17c0887775bb77896f4cc11a39bf848 ] epoll_loop_check_proc() can run into a file already committed to destruction; we can't grab a reference on those and don't need to add them to the set for reverse path check anyway. Tested-by: Marc Zyngier Fixes: a9ed4a6560b8 ("epoll: Keep a reference on files added to the check list") Signed-off-by: Al Viro Signed-off-by: Sasha Levin fs/eventpoll.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) culprit signature: d3d39d7952cb4dba54a9d812e1d2582919a60ebe5cd06c282a1c9a68809d0a12 parent signature: 7cae0bf82214bb47f7700300d0edb5e0fae01810f962c5f98daa74a62314a112 revisions tested: 10, total time: 3h8m47.927378445s (build: 1h30m5.716132019s, test: 1h37m21.925435071s) first good commit: c5c6e00f6cc5d3ed0d6464b14e33f2f5c8505888 fix regression in "epoll: Keep a reference on files added to the check list" recipients (to): ["maz@kernel.org" "sashal@kernel.org" "viro@zeniv.linux.org.uk"] recipients (cc): []