Messages in this thread | | | Date | Tue, 27 Feb 2024 14:52:32 +0100 | From | Mirsad Todorovac <> | Subject | [BUG] selftest: memfd: indefinite hang in ./fuse_mnt ./mnt |
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Hi everybody,
This is an issue already reported in thread:
Link: https://lore.kernel.org/all/4a5aa618-8fbc-4053-ba38-0809735d864b@alu.unizg.hr/
around January 7th.
It is again against the latest vanilla torvalds build on Ubuntu 23.10 and an AMD Ryzen 7 box.
Please find the .config attached.
Here are some diagnostics and log outputs:
root@stargazer:/home/marvin/linux/kernel/linux_torvalds# lsof -p 85021 lsof: WARNING: can't stat() fuse.portal file system /run/user/1000/doc Output information may be incomplete. lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs Output information may be incomplete. COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME fuse_mnt 85021 root cwd DIR 259,13 4096 2 / fuse_mnt 85021 root rtd DIR 259,13 4096 2 / fuse_mnt 85021 root txt REG 0,44 16760 7558526 /home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/memfd/fuse_mnt fuse_mnt 85021 root mem REG 0,40 7558526 /home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/memfd/fuse_mnt (path dev=0,44) fuse_mnt 85021 root mem REG 0,26 481843 /usr/lib/x86_64-linux-gnu/libc.so.6 (path dev=0,27) fuse_mnt 85021 root mem REG 0,26 434443 /usr/lib/x86_64-linux-gnu/libfuse.so.2.9.9 (path dev=0,27) fuse_mnt 85021 root mem REG 0,26 22118 /usr/libexec/coreutils/libstdbuf.so (path dev=0,27) fuse_mnt 85021 root mem REG 0,26 481840 /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 (path dev=0,27) fuse_mnt 85021 root 0u CHR 1,3 0t0 5 /dev/null fuse_mnt 85021 root 1u CHR 1,3 0t0 5 /dev/null fuse_mnt 85021 root 2u CHR 1,3 0t0 5 /dev/null fuse_mnt 85021 root 3w FIFO 0,14 0t0 404306 pipe fuse_mnt 85021 root 4w FIFO 0,14 0t0 19072 pipe fuse_mnt 85021 root 5u CHR 10,229 0t0 88 /dev/fuse root@stargazer:/home/marvin/linux/kernel/linux_torvalds# strace -p !$ strace -p 85021 strace: Process 85021 attached futex(0x7ffc1a7c9ea0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, FUTEX_BITSET_MATCH_ANY^Cstrace: Process 85021 detached <detached ...>
root@stargazer:/home/marvin/linux/kernel/linux_torvalds#
make[3]: Entering directory '/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/memfd' TAP version 13 1..3 # timeout set to 45 # selftests: memfd: memfd_test # memfd: CREATE # memfd: BASIC # memfd: SEAL-EXEC # memfd: Apply SEAL_EXEC # memfd: Apply ALL_SEALS # memfd: EXEC_NO_SEAL # memfd: NOEXEC_SEAL # memfd: SEAL-WRITE # memfd: SEAL-FUTURE-WRITE # memfd: SEAL-SHRINK # memfd: SEAL-GROW # memfd: SEAL-RESIZE # memfd: sysctl 0 # memfd: sysctl 1 # memfd: sysctl 0 # memfd: sysctl 2 # memfd: sysctl 1 # memfd: sysctl 0 # memfd: nested sysctl 0 # memfd: sysctl 0 # memfd: sysctl 1 # memfd: sysctl 0 # memfd: sysctl 2 # memfd: sysctl 1 # memfd: sysctl 0 # memfd: nested sysctl 1 # memfd: nested sysctl 2 # memfd: nested sysctl 0 -> 1 after fork # memfd: nested sysctl 0 -> 2 after fork # memfd: nested sysctl 2 -> 1 after fork # memfd: nested sysctl 2 -> 0 after fork # memfd: nested sysctl 1 -> 0 after fork # memfd: SHARE-DUP # memfd: SHARE-MMAP # memfd: SHARE-OPEN # memfd: SHARE-FORK # memfd: SHARE-DUP (shared file-table) # memfd: SHARE-MMAP (shared file-table) # memfd: SHARE-OPEN (shared file-table) # memfd: SHARE-FORK (shared file-table) # memfd: DONE ok 1 selftests: memfd: memfd_test # timeout set to 45 # selftests: memfd: run_fuse_test.sh # opening: ./mnt/memfd # fuse: DONE ok 2 selftests: memfd: run_fuse_test.sh # timeout set to 45 # selftests: memfd: run_hugetlbfs_test.sh # memfd-hugetlb: CREATE # memfd-hugetlb: BASIC # memfd-hugetlb: SEAL-EXEC # memfd-hugetlb: Apply SEAL_EXEC # fchmod(/memfd:kern_memfd_seal_exec (deleted), 00777) didn't fail as expected # ./run_hugetlbfs_test.sh: line 60: 85016 Aborted (core dumped) ./memfd_test hugetlbfs # opening: ./mnt/memfd # ADD_SEALS(6, 0 -> 8) failed: Device or resource busy # 8 != 0 = GET_SEALS(6) # Aborted (core dumped) ok 3 selftests: memfd: run_hugetlbfs_test.sh make[3]: Leaving directory '/home/marvin/linux/kernel/linux_torvalds/tools/testing/selftests/memfd'
Best regards, Mirsad Todorovac
-- CARNet system engineer Faculty of Graphic Arts | Academy of Fine Arts University of Zagreb
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