Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2)

Hello, syzbot has tested the proposed patch and the reproducer did not trigger crash: Reported-and-tested-by: syzbot+bca9799bf12925619...@syzkaller.appspotmail.com Tested on: commit: 5749fe5a ext4: avoid race conditions when remounting with .. git tree:

Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2)

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git 5749fe5af3db176659978718ddaecebb450cdb6b

Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2)

Hello, syzbot has tested the proposed patch but the reproducer still triggered crash: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write BUG: kernel NULL pointer dereference, address: #PF: supervisor instruction fetch in kernel mode #PF:

Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2)

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git 5b8b9d0c6d0e0f1993c6c56deaf9646942c49d94

Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2)

Hello, syzbot tried to test the proposed patch but build/boot failed: syzkaller build failed: failed to run ["make" "target"]: exit status 2 GOOS=linux GOARCH=amd64 go install ./syz-fuzzer # github.com/google/syzkaller/sys/netbsd/gen sys/netbsd/gen/amd64.go:41:58: undefined: Field

Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2)

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5b8b9d0c6d0e0f1993c6c56deaf9646942c49d94