syzbot


possible deadlock in fuse_reverse_inval_entry
Status: upstream: reported C repro on 2021/08/12 13:53
Reported-by: syzbot+9f747458f5990eaa8d43@syzkaller.appspotmail.com
Fix commit: bda9a71980e0 fuse: annotate lock in fuse_reverse_inval_entry()
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 115d, last: 84d

Cause bisection: failed (bisect log)
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 possible deadlock in fuse_reverse_inval_entry C 1 23d 113d 0/1 upstream: reported C repro on 2021/08/10 04:41
linux-4.19 possible deadlock in fuse_reverse_inval_entry C error 1 67d 157d 0/1 upstream: reported C repro on 2021/06/27 09:34
Patch testing requests:
Created Duration User Patch Repo Result
2021/09/07 15:25 26m miklos@szeredi.hu patch upstream OK

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/09/08 00:25 upstream 626bf91a292e 6972b106 .config log report syz C
Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/08/08 13:48 upstream 85a90500f9a1 6972b106 .config log report syz C possible deadlock in fuse_reverse_inval_entry