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Bug#1060005: cifs-utils: Copy file with cp, hangs with a kernel NULL pointer dereference.

From	Eduardo Nunes <eduardo.david.nunes@gmail.com>
Newsgroups	linux.debian.bugs.dist
Subject	Bug#1060005: cifs-utils: Copy file with cp, hangs with a kernel NULL pointer dereference.
Date	2024-01-04 17:00 +0100
Message-ID	<HSyit-LOd-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Package: cifs-utils
Version: 2:7.0-2
Severity: normal
X-Debbugs-Cc: eduardo.david.nunes@gmail.com

Dear Maintainer,


When copying a file between directories on same mount, the operation hangs with:
BUG: kernel NULL pointer dereference, address: 0000000000000000
in RIP: 0010:cifs_flush_folio+0x3f/0x100 [cifs]

Debian12 6.1.0-17-amd run as guest in VirtualBox 7.0.12 and the mounted share is on the host (Windows 10).
Works as expected in the same configuration but with Debian11 5.10.0-27-amd64 as guest.



-- System Information:
Debian Release: 12.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-17-amd64 (SMP w/1 CPU thread; PREEMPT)
Kernel taint flags: TAINT_DIE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages cifs-utils depends on:
ii  libc6             2.36-9+deb12u3
ii  libcap-ng0        0.8.3-1+b3
ii  libgssapi-krb5-2  1.20.1-2+deb12u1
ii  libkeyutils1      1.6.3-2
ii  libkrb5-3         1.20.1-2+deb12u1
ii  libpam0g          1.5.2-6+deb12u1
ii  libtalloc2        2.4.0-f2
ii  libwbclient0      2:4.17.12+dfsg-0+deb12u1
ii  python3           3.11.2-1+b1

Versions of packages cifs-utils recommends:
ii  keyutils  1.6.3-2

Versions of packages cifs-utils suggests:
ii  bash-completion  1:2.11-6
pn  smbclient        <none>
pn  winbind          <none>

-- no debconf information

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Bug#1060005: cifs-utils: Copy file with cp, hangs with a kernel NULL pointer dereference. Eduardo Nunes <eduardo.david.nunes@gmail.com> - 2024-01-04 17:00 +0100
  Bug#1060005: cifs-utils: Copy file with cp, hangs with a kernel NULL pointer dereference. Michael Tokarev <mjt@tls.msk.ru> - 2024-01-05 12:00 +0100
    Bug#1060005: cifs-utils: Copy file with cp, hangs with a kernel NULL pointer dereference. Salvatore Bonaccorso <carnil@debian.org> - 2024-01-05 22:10 +0100

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