Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:EOL][EOL]f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data[EOL][EOL]There is issue as follows when test f2fs atomic write:[EOL]F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock[EOL]F2FS-fs (loop0): invalid crc_offset: 0[EOL]F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix.[EOL]F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.[EOL]==================================================================[EOL]BUG: KASAN: null-ptr-deref in f2fs_get_dnode_of_data+0xac/0x16d0[EOL]Read of size 8 at addr 0000000000000028 by task rep/1990[EOL][EOL]CPU: 4 PID: 1990 Comm: rep Not tainted 5.19.0-rc6-next-20220715 #266[EOL]Call Trace:[EOL] <TASK>[EOL] dump_stack_lvl+0x6e/0x91[EOL] print_report.cold+0x49a/0x6bb[EOL] kasan_report+0xa8/0x130[EOL] f2fs_get_dnode_of_data+0xac/0x16d0[EOL] f2fs_do_write_data_page+0x2a5/0x1030[EOL] move_data_page+0x3c5/0xdf0[EOL] do_garbage_collect+0x2015/0x36c0[EOL] f2fs_gc+0x554/0x1d30[EOL] f2fs_balance_fs+0x7f5/0xda0[EOL] f2fs_write_single_data_page+0xb66/0xdc0[EOL] f2fs_write_cache_pages+0x716/0x1420[EOL] f2fs_write_data_pages+0x84f/0x9a0[EOL] do_writepages+0x130/0x3a0[EOL] filemap_fdatawrite_wbc+0x87/0xa0[EOL] file_write_and_wait_range+0x157/0x1c0[EOL] f2fs_do_sync_file+0x206/0x12d0[EOL] f2fs_sync_file+0x99/0xc0[EOL] vfs_fsync_range+0x75/0x140[EOL] f2fs_file_write_iter+0xd7b/0x1850[EOL] vfs_write+0x645/0x780[EOL] ksys_write+0xf1/0x1e0[EOL] do_syscall_64+0x3b/0x90[EOL] entry_SYSCALL_64_after_hwframe+0x63/0xcd[EOL][EOL]As 3db1de0e582c commit changed atomic write way which new a cow_inode for[EOL]atomic write file, and also mark cow_inode as FI_ATOMIC_FILE.[EOL]When f2fs_do_write_data_page write cow_inode will use cow_inode's cow_inode[EOL]which is NULL. Then will trigger null-ptr-deref.[EOL]To solve above issue, introduce FI_COW_FILE flag for COW inode.[EOL][EOL]Fiexes: 3db1de0e582c("f2fs: change the current atomic write way")

CREATE(Triage):(User=lchen-cn) [CVE-2022-50009 (https://nvd.nist.gov/vuln/detail/CVE-2022-50009)