CVE-2025-68261

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock()<br /> <br /> Fix a race between inline data destruction and block mapping.<br /> <br /> The function ext4_destroy_inline_data_nolock() changes the inode data<br /> layout by clearing EXT4_INODE_INLINE_DATA and setting EXT4_INODE_EXTENTS.<br /> At the same time, another thread may execute ext4_map_blocks(), which<br /> tests EXT4_INODE_EXTENTS to decide whether to call ext4_ext_map_blocks()<br /> or ext4_ind_map_blocks().<br /> <br /> Without i_data_sem protection, ext4_ind_map_blocks() may receive inode<br /> with EXT4_INODE_EXTENTS flag and triggering assert.<br /> <br /> kernel BUG at fs/ext4/indirect.c:546!<br /> EXT4-fs (loop2): unmounting filesystem.<br /> invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI<br /> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014<br /> RIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546<br /> <br /> Call Trace:<br /> <br /> ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681<br /> _ext4_get_block+0x242/0x590 fs/ext4/inode.c:822<br /> ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124<br /> ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255<br /> ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000<br /> generic_perform_write+0x259/0x5d0 mm/filemap.c:3846<br /> ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285<br /> ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679<br /> call_write_iter include/linux/fs.h:2271 [inline]<br /> do_iter_readv_writev+0x212/0x3c0 fs/read_write.c:735<br /> do_iter_write+0x186/0x710 fs/read_write.c:861<br /> vfs_iter_write+0x70/0xa0 fs/read_write.c:902<br /> iter_file_splice_write+0x73b/0xc90 fs/splice.c:685<br /> do_splice_from fs/splice.c:763 [inline]<br /> direct_splice_actor+0x10f/0x170 fs/splice.c:950<br /> splice_direct_to_actor+0x33a/0xa10 fs/splice.c:896<br /> do_splice_direct+0x1a9/0x280 fs/splice.c:1002<br /> do_sendfile+0xb13/0x12c0 fs/read_write.c:1255<br /> __do_sys_sendfile64 fs/read_write.c:1323 [inline]<br /> __se_sys_sendfile64 fs/read_write.c:1309 [inline]<br /> __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309<br /> do_syscall_x64 arch/x86/entry/common.c:51 [inline]<br /> do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81<br /> entry_SYSCALL_64_after_hwframe+0x6e/0xd8