CVE-2024-57895

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ksmbd: set ATTR_CTIME flags when setting mtime<br /> <br /> David reported that the new warning from setattr_copy_mgtime is coming<br /> like the following.<br /> <br /> [ 113.215316] ------------[ cut here ]------------<br /> [ 113.215974] WARNING: CPU: 1 PID: 31 at fs/attr.c:300 setattr_copy+0x1ee/0x200<br /> [ 113.219192] CPU: 1 UID: 0 PID: 31 Comm: kworker/1:1 Not tainted 6.13.0-rc1+ #234<br /> [ 113.220127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014<br /> [ 113.221530] Workqueue: ksmbd-io handle_ksmbd_work [ksmbd]<br /> [ 113.222220] RIP: 0010:setattr_copy+0x1ee/0x200<br /> [ 113.222833] Code: 24 28 49 8b 44 24 30 48 89 53 58 89 43 6c 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 89 df e8 77 d6 ff ff e9 cd fe ff ff 0b e9 be fe ff ff 66 0<br /> [ 113.225110] RSP: 0018:ffffaf218010fb68 EFLAGS: 00010202<br /> [ 113.225765] RAX: 0000000000000120 RBX: ffffa446815f8568 RCX: 0000000000000003<br /> [ 113.226667] RDX: ffffaf218010fd38 RSI: ffffa446815f8568 RDI: ffffffff94eb03a0<br /> [ 113.227531] RBP: ffffaf218010fb90 R08: 0000001a251e217d R09: 00000000675259fa<br /> [ 113.228426] R10: 0000000002ba8a6d R11: ffffa4468196c7a8 R12: ffffaf218010fd38<br /> [ 113.229304] R13: 0000000000000120 R14: ffffffff94eb03a0 R15: 0000000000000000<br /> [ 113.230210] FS: 0000000000000000(0000) GS:ffffa44739d00000(0000) knlGS:0000000000000000<br /> [ 113.231215] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> [ 113.232055] CR2: 00007efe0053d27e CR3: 000000000331a000 CR4: 00000000000006b0<br /> [ 113.232926] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br /> [ 113.233812] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400<br /> [ 113.234797] Call Trace:<br /> [ 113.235116] <br /> [ 113.235393] ? __warn+0x73/0xd0<br /> [ 113.235802] ? setattr_copy+0x1ee/0x200<br /> [ 113.236299] ? report_bug+0xf3/0x1e0<br /> [ 113.236757] ? handle_bug+0x4d/0x90<br /> [ 113.237202] ? exc_invalid_op+0x13/0x60<br /> [ 113.237689] ? asm_exc_invalid_op+0x16/0x20<br /> [ 113.238185] ? setattr_copy+0x1ee/0x200<br /> [ 113.238692] btrfs_setattr+0x80/0x820 [btrfs]<br /> [ 113.239285] ? get_stack_info_noinstr+0x12/0xf0<br /> [ 113.239857] ? __module_address+0x22/0xa0<br /> [ 113.240368] ? handle_ksmbd_work+0x6e/0x460 [ksmbd]<br /> [ 113.240993] ? __module_text_address+0x9/0x50<br /> [ 113.241545] ? __module_address+0x22/0xa0<br /> [ 113.242033] ? unwind_next_frame+0x10e/0x920<br /> [ 113.242600] ? __pfx_stack_trace_consume_entry+0x10/0x10<br /> [ 113.243268] notify_change+0x2c2/0x4e0<br /> [ 113.243746] ? stack_depot_save_flags+0x27/0x730<br /> [ 113.244339] ? set_file_basic_info+0x130/0x2b0 [ksmbd]<br /> [ 113.244993] set_file_basic_info+0x130/0x2b0 [ksmbd]<br /> [ 113.245613] ? process_scheduled_works+0xbe/0x310<br /> [ 113.246181] ? worker_thread+0x100/0x240<br /> [ 113.246696] ? kthread+0xc8/0x100<br /> [ 113.247126] ? ret_from_fork+0x2b/0x40<br /> [ 113.247606] ? ret_from_fork_asm+0x1a/0x30<br /> [ 113.248132] smb2_set_info+0x63f/0xa70 [ksmbd]<br /> <br /> ksmbd is trying to set the atime and mtime via notify_change without also<br /> setting the ctime. so This patch add ATTR_CTIME flags when setting mtime<br /> to avoid a warning.