bisecting fixing commit since 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 building syzkaller on 0ea7a8875d3f20d3bdf6323495521b62ef71878c testing commit 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 with gcc (GCC) 8.1.0 kernel signature: 0b412b9c3a548de50a54c535dc20930363fd5dd2318e3595f0b78194d637e39a run #0: crashed: general protection fault in __sock_release run #1: crashed: general protection fault in __sock_release run #2: crashed: general protection fault in __sock_release run #3: crashed: general protection fault in __sock_release run #4: crashed: general protection fault in __sock_release run #5: crashed: general protection fault in locks_remove_file run #6: crashed: general protection fault in __sock_release run #7: crashed: general protection fault in fsnotify run #8: crashed: general protection fault in locks_remove_file run #9: crashed: general protection fault in __sock_release testing current HEAD bae31eef2a167ef160ab2703b6a2f5bbecd98d92 testing commit bae31eef2a167ef160ab2703b6a2f5bbecd98d92 with gcc (GCC) 8.1.0 kernel signature: 9fb13cc2f6e44962cb8172d151229bac83134990fc1e23697dbbd0ac259e9948 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: b71356fc4504d50c12e8cf8a528017ad6de6bf0a79560de9b1cbe8dc016106c9 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: 207f0ae3b7319b4242065139ad661584d77b05c639dd010808cb3f9a7b050ec4 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: a60f93602c7a9ce4342bfa05dde80a552bcc7a0a4140b4571114505f0430b3f0 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: 0a926eb0003bff927a399aa51a44c57a5b7f0281b1dbb5db053ad7f0080622af run #0: crashed: general protection fault in __sock_release run #1: crashed: general protection fault in __sock_release run #2: crashed: general protection fault in __sock_release run #3: crashed: general protection fault in __sock_release run #4: crashed: general protection fault in locks_remove_file run #5: crashed: WARNING: ODEBUG bug in exit_to_usermode_loop run #6: crashed: KASAN: use-after-free Read in rwsem_spin_on_owner run #7: crashed: general protection fault in locks_remove_file run #8: crashed: WARNING: ODEBUG bug in get_signal run #9: crashed: general protection fault in __sock_release # 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: 6a644140c38e8b341fd089b0312bd055e344a9e4b3e7ec16f441d3c3e8d33a82 run #0: crashed: general protection fault in __sock_release run #1: crashed: general protection fault in __sock_release run #2: crashed: kernel BUG at fs/inode.c:LINE! run #3: crashed: WARNING: ODEBUG bug in exit_to_usermode_loop run #4: crashed: general protection fault in locks_remove_file run #5: crashed: general protection fault in locks_remove_file run #6: crashed: general protection fault in __sock_release run #7: crashed: general protection fault in __sock_release run #8: crashed: general protection fault in __sock_release run #9: crashed: WARNING: ODEBUG bug in get_signal # 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: f072215a7e0d92683d262de7cae27427e21eb2f6824945f0a5d2646343ac0a7c 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: e46373f781e6cea0a63e0f961089a9d6f1e9d8df0f155933a9c0f9115d5180e0 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: abee30f9a3a1d86b97e64ef03f003ea45e3b116498be584a19c04322c973929f 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: abee30f9a3a1d86b97e64ef03f003ea45e3b116498be584a19c04322c973929f parent signature: 6a644140c38e8b341fd089b0312bd055e344a9e4b3e7ec16f441d3c3e8d33a82 revisions tested: 10, total time: 2h47m3.066340603s (build: 1h28m35.89071155s, test: 1h16m59.98967893s) 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): []