DEBIAN-CVE-2024-41083

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfspagemkwrite() to check folio->mapping is valid Fix netfspagemkwrite() to check that folio->mapping is valid once it has taken the folio lock (as filemappagemkwrite() does). Without this, generic/247 occasionally oopses with something like the following: BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: errorcode(0x0000) - not-present page RIP: 0010:traceeventraweventnetfsfolio+0x61/0xc0 ... Call Trace: <TASK> ? _diebody+0x1a/0x60 ? pagefaultoops+0x6e/0xa0 ? excpagefault+0xc2/0xe0 ? asmexcpagefault+0x22/0x30 ? traceeventraweventnetfsfolio+0x61/0xc0 tracenetfsfolio+0x39/0x40 netfspagemkwrite+0x14c/0x1d0 dopagemkwrite+0x50/0x90 doptemissing+0x184/0x200 _handlemmfault+0x42d/0x500 handlemmfault+0x121/0x1f0 douseraddrfault+0x23e/0x3c0 excpagefault+0xc2/0xe0 asmexcpagefault+0x22/0x30 This is due to the invalidateinodepages2range() issued at the end of the DIO write interfering with the mmap'd writes.