CVE-2023-53829

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> f2fs: flush inode if atomic file is aborted<br /> <br /> Let&amp;#39;s flush the inode being aborted atomic operation to avoid stale dirty<br /> inode during eviction in this call stack:<br /> <br /> f2fs_mark_inode_dirty_sync+0x22/0x40 [f2fs]<br /> f2fs_abort_atomic_write+0xc4/0xf0 [f2fs]<br /> f2fs_evict_inode+0x3f/0x690 [f2fs]<br /> ? sugov_start+0x140/0x140<br /> evict+0xc3/0x1c0<br /> evict_inodes+0x17b/0x210<br /> generic_shutdown_super+0x32/0x120<br /> kill_block_super+0x21/0x50<br /> deactivate_locked_super+0x31/0x90<br /> cleanup_mnt+0x100/0x160<br /> task_work_run+0x59/0x90<br /> do_exit+0x33b/0xa50<br /> do_group_exit+0x2d/0x80<br /> __x64_sys_exit_group+0x14/0x20<br /> do_syscall_64+0x3b/0x90<br /> entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> <br /> This triggers f2fs_bug_on() in f2fs_evict_inode:<br /> f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));<br /> <br /> This fixes the syzbot report:<br /> <br /> loop0: detected capacity change from 0 to 131072<br /> F2FS-fs (loop0): invalid crc value<br /> F2FS-fs (loop0): Found nat_bits in checkpoint<br /> F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4<br /> ------------[ cut here ]------------<br /> kernel BUG at fs/f2fs/inode.c:869!<br /> invalid opcode: 0000 [#1] PREEMPT SMP KASAN<br /> CPU: 0 PID: 5014 Comm: syz-executor220 Not tainted 6.4.0-syzkaller-11479-g6cd06ab12d1a #0<br /> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023<br /> RIP: 0010:f2fs_evict_inode+0x172d/0x1e00 fs/f2fs/inode.c:869<br /> Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 06 00 00 8b 75 40 ba 01 00 00 00 4c 89 e7 e8 6d ce 06 00 e9 aa fc ff ff e8 63 22 e2 fd 0b e8 5c 22 e2 fd 48 c7 c0 a8 3a 18 8d 48 ba 00 00 00 00 00 fc<br /> RSP: 0018:ffffc90003a6fa00 EFLAGS: 00010293<br /> RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000<br /> RDX: ffff8880273b8000 RSI: ffffffff83a2bd0d RDI: 0000000000000007<br /> RBP: ffff888077db91b0 R08: 0000000000000007 R09: 0000000000000000<br /> R10: 0000000000000001 R11: 0000000000000001 R12: ffff888029a3c000<br /> R13: ffff888077db9660 R14: ffff888029a3c0b8 R15: ffff888077db9c50<br /> FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 00007f1909bb9000 CR3: 00000000276a9000 CR4: 0000000000350ef0<br /> Call Trace:<br /> <br /> evict+0x2ed/0x6b0 fs/inode.c:665<br /> dispose_list+0x117/0x1e0 fs/inode.c:698<br /> evict_inodes+0x345/0x440 fs/inode.c:748<br /> generic_shutdown_super+0xaf/0x480 fs/super.c:478<br /> kill_block_super+0x64/0xb0 fs/super.c:1417<br /> kill_f2fs_super+0x2af/0x3c0 fs/f2fs/super.c:4704<br /> deactivate_locked_super+0x98/0x160 fs/super.c:330<br /> deactivate_super+0xb1/0xd0 fs/super.c:361<br /> cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1254<br /> task_work_run+0x16f/0x270 kernel/task_work.c:179<br /> exit_task_work include/linux/task_work.h:38 [inline]<br /> do_exit+0xa9a/0x29a0 kernel/exit.c:874<br /> do_group_exit+0xd4/0x2a0 kernel/exit.c:1024<br /> __do_sys_exit_group kernel/exit.c:1035 [inline]<br /> __se_sys_exit_group kernel/exit.c:1033 [inline]<br /> __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1033<br /> do_syscall_x64 arch/x86/entry/common.c:50 [inline]<br /> do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80<br /> entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> RIP: 0033:0x7f309be71a09<br /> Code: Unable to access opcode bytes at 0x7f309be719df.<br /> RSP: 002b:00007fff171df518 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7<br /> RAX: ffffffffffffffda RBX: 00007f309bef7330 RCX: 00007f309be71a09<br /> RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001<br /> RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f309bef1e40<br /> R10: 0000000000010600 R11: 0000000000000246 R12: 00007f309bef7330<br /> R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001<br /> <br /> Modules linked in:<br /> ---[ end trace 0000000000000000 ]---<br /> RIP: 0010:f2fs_evict_inode+0x172d/0x1e00 fs/f2fs/inode.c:869<br /> Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 06 00 00 8b 75 40 ba 01 00 00 00 4c 89 e7 e8 6d ce 06 00 e9 aa fc ff ff e8 63 22 e2 fd 0b e8 5c 22 e2 fd 48 c7 c0 a8 3a 18 8d 48 ba 00 00 00 00 00 fc<br /> RSP: 0018:ffffc90003a6fa00 EFLAGS: 00010293<br /> RAX: 0000000000000000 RBX: 0000000000<br /> ---truncated---