Bug 281291 - zfs: panic: MSan: Uninitialized malloc memory from zfs_acl_chmod
Summary: zfs: panic: MSan: Uninitialized malloc memory from zfs_acl_chmod
Status: In Progress
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: Alan Somers
URL: https://github.com/openzfs/zfs/pull/1...
Keywords: crash
Depends on:
Blocks:
 
Reported: 2024-09-05 14:46 UTC by Alan Somers
Modified: 2024-09-06 17:58 UTC (History)
1 user (show)

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Description Alan Somers freebsd_committer freebsd_triage 2024-09-05 14:46:35 UTC 
I tried to run the ZFS test suite with a GENERIC-KMSAN kernel.  The sys/cddl/zfs/tests/bootfs/bootfs_test:bootfs_005_neg test paniced like this:

panic: MSan: Uninitialized malloc memory from zfs_acl_chmod+0x2cd
cpuid = 6
time = 1725502132
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x99/frame 0xfffffe00b4c9c540
vpanic() at vpanic+0x56e/frame 0xfffffe00b4c9c6d0
panic() at panic+0x1dd/frame 0xfffffe00b4c9c7e0
__msan_warning() at __msan_warning+0x244/frame 0xfffffe00b4c9c930
lzjb_compress() at lzjb_compress+0x9f6/frame 0xfffffe00b4c9ca70
zio_compress_data() at zio_compress_data+0x388/frame 0xfffffe00b4c9cb40
zio_write_compress() at zio_write_compress+0x12bd/frame 0xfffffe00b4c9cca0
zio_execute() at zio_execute+0x4e0/frame 0xfffffe00b4c9cd30
taskqueue_run_locked() at taskqueue_run_locked+0x607/frame 0xfffffe00b4c9ce30
taskqueue_thread_loop() at taskqueue_thread_loop+0x29e/frame 0xfffffe00b4c9cea0
fork_exit() at fork_exit+0x1ee/frame 0xfffffe00b4c9cf30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00b4c9cf30
--- trap 0x5a5a5a5a, rip = 0x5a5a5a5a5a5a5a5a, rsp = 0x5a5a5a5a5a5a5a5a, rbp = 0x5a5a5a5a5a5a5a5a ---
KDB: enter: panic
Comment 1 Alan Somers freebsd_committer freebsd_triage 2024-09-05 21:41:55 UTC 
Code review in progress upstream.