Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix null pointer panic in tracepoint in __replace_atomic_write_block We got a kernel panic if old_addr is NULL. https://bugzilla.kernel.org/show_bug.cgi?id=217266 BUG: kernel NULL pointer dereference, address: 0000000000000000 Call Trace: <TASK> f2fs_commit_atomic_write+0x619/0x990 [f2fs a1b985b80f5babd6f3ea778384908880812bfa43] __f2fs_ioctl+0xd8e/0x4080 [f2fs a1b985b80f5babd6f3ea778384908880812bfa43] ? vfs_write+0x2ae/0x3f0 ? vfs_write+0x2ae/0x3f0 __x64_sys_ioctl+0x91/0xd0 do_syscall_64+0x5c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f69095fe53f

References 4

• git.kernel.org https://git.kernel.org/stable/c/1424358cd66c49460493293497b54cb72e0213cc
• git.kernel.org https://git.kernel.org/stable/c/424f8cdc0ad29e4940be96dcc0b935ba497adeda
• git.kernel.org https://git.kernel.org/stable/c/da6ea0b050fa720302b56fbb59307e7c7531a342
• git.kernel.org https://git.kernel.org/stable/c/e2bbefc1741cb0732c13652be173da02f25611d1

Remediation