[LU-10166] Changelog reader crashes when closing the changelog

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.11.0, Lustre 2.10.2
• Labels: patch
• Assignee: Henri Doreau (Inactive)
• Reporter: Henri Doreau (Inactive)

Description

This has been observed on a changelog reader reaching the end of the log and closing the distribution device @/dev/changelog-lustre-MDT0000.

[...]
<4>[191138.657243] [<ffffffff81063338>] __wake_up+0x48/0x70
<4>[191138.663269] [<ffffffffa0bdcad6>] chlg_release+0x36/0x40 [mdc]
<4>[191138.670163] [<ffffffff8119b8b5>] __fput+0xf5/0x210
<4>[191138.675996] [<ffffffff8119b9f5>] fput+0x25/0x30
<4>[191138.681512] [<ffffffff81196b1d>] filp_close+0x5d/0x90
<4>[191138.687613] [<ffffffff81196bf5>] sys_close+0xa5/0x100
<4>[191138.693729] [<ffffffff8100b0d2>] system_call_fastpath+0x16/0x1b