CVE-2025-38328

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> jffs2: check jffs2_prealloc_raw_node_refs() result in few other places<br /> <br /> Fuzzing hit another invalid pointer dereference due to the lack of<br /> checking whether jffs2_prealloc_raw_node_refs() completed successfully.<br /> Subsequent logic implies that the node refs have been allocated.<br /> <br /> Handle that. The code is ready for propagating the error upwards.<br /> <br /> KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]<br /> CPU: 1 PID: 5835 Comm: syz-executor145 Not tainted 5.10.234-syzkaller #0<br /> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014<br /> RIP: 0010:jffs2_link_node_ref+0xac/0x690 fs/jffs2/nodelist.c:600<br /> Call Trace:<br /> jffs2_mark_erased_block fs/jffs2/erase.c:460 [inline]<br /> jffs2_erase_pending_blocks+0x688/0x1860 fs/jffs2/erase.c:118<br /> jffs2_garbage_collect_pass+0x638/0x1a00 fs/jffs2/gc.c:253<br /> jffs2_reserve_space+0x3f4/0xad0 fs/jffs2/nodemgmt.c:167<br /> jffs2_write_inode_range+0x246/0xb50 fs/jffs2/write.c:362<br /> jffs2_write_end+0x712/0x1110 fs/jffs2/file.c:302<br /> generic_perform_write+0x2c2/0x500 mm/filemap.c:3347<br /> __generic_file_write_iter+0x252/0x610 mm/filemap.c:3465<br /> generic_file_write_iter+0xdb/0x230 mm/filemap.c:3497<br /> call_write_iter include/linux/fs.h:2039 [inline]<br /> do_iter_readv_writev+0x46d/0x750 fs/read_write.c:740<br /> do_iter_write+0x18c/0x710 fs/read_write.c:866<br /> vfs_writev+0x1db/0x6a0 fs/read_write.c:939<br /> do_pwritev fs/read_write.c:1036 [inline]<br /> __do_sys_pwritev fs/read_write.c:1083 [inline]<br /> __se_sys_pwritev fs/read_write.c:1078 [inline]<br /> __x64_sys_pwritev+0x235/0x310 fs/read_write.c:1078<br /> do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46<br /> entry_SYSCALL_64_after_hwframe+0x67/0xd1<br /> <br /> Found by Linux Verification Center (linuxtesting.org) with Syzkaller.