loop0: detected capacity change from 144 to 0 EXT4-fs (loop0): VFS: Found ext4 filesystem with invalid superblock checksum. Run e2fsck? ===================================================== BUG: KMSAN: uninit-value in ext4_inode_journal_mode+0x28b/0x4f0 fs/ext4/ext4_jbd2.c:16 CPU: 1 PID: 8784 Comm: syz-executor.0 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 ext4_inode_journal_mode+0x28b/0x4f0 fs/ext4/ext4_jbd2.c:16 ext4_should_journal_data fs/ext4/ext4_jbd2.h:459 [inline] ext4_evict_inode+0x1ba/0x2bb0 fs/ext4/inode.c:202 evict+0x4b8/0xdd0 fs/inode.c:577 iput_final fs/inode.c:1653 [inline] iput+0xb6d/0xee0 fs/inode.c:1679 __ext4_new_inode+0x3dda/0x9c80 fs/ext4/ialloc.c:1354 ext4_create+0x47e/0x960 fs/ext4/namei.c:2613 lookup_open fs/namei.c:3106 [inline] open_last_lookups fs/namei.c:3180 [inline] path_openat+0x2b71/0x6a30 fs/namei.c:3368 do_filp_open+0x2b8/0x710 fs/namei.c:3398 do_sys_openat2+0x25f/0x830 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_compat_sys_openat fs/open.c:1246 [inline] __se_compat_sys_openat+0x2ae/0x310 fs/open.c:1244 __ia32_compat_sys_openat+0x56/0x70 fs/open.c:1244 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline] __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:141 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:166 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:209 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f50549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f554a5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000440 RDX: 0000000000000042 RSI: 0000000000000180 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:121 kmsan_alloc_page+0xd3/0x1f0 mm/kmsan/kmsan_shadow.c:274 __alloc_pages_nodemask+0x827/0xf90 mm/page_alloc.c:5038 alloc_pages_current+0x7b6/0xb60 mm/mempolicy.c:2267 alloc_pages include/linux/gfp.h:547 [inline] alloc_slab_page mm/slub.c:1633 [inline] allocate_slab+0x392/0x11e0 mm/slub.c:1773 new_slab mm/slub.c:1836 [inline] new_slab_objects mm/slub.c:2593 [inline] ___slab_alloc+0xd42/0x1930 mm/slub.c:2756 __slab_alloc mm/slub.c:2796 [inline] slab_alloc_node mm/slub.c:2872 [inline] slab_alloc mm/slub.c:2916 [inline] kmem_cache_alloc+0xc36/0xff0 mm/slub.c:2921 ext4_alloc_inode+0x5e/0x870 fs/ext4/super.c:1276 alloc_inode fs/inode.c:233 [inline] new_inode_pseudo+0xa7/0x580 fs/inode.c:927 new_inode+0x5a/0x3d0 fs/inode.c:956 __ext4_new_inode+0x3a0/0x9c80 fs/ext4/ialloc.c:956 ext4_create+0x47e/0x960 fs/ext4/namei.c:2613 lookup_open fs/namei.c:3106 [inline] open_last_lookups fs/namei.c:3180 [inline] path_openat+0x2b71/0x6a30 fs/namei.c:3368 do_filp_open+0x2b8/0x710 fs/namei.c:3398 do_sys_openat2+0x25f/0x830 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_compat_sys_openat fs/open.c:1246 [inline] __se_compat_sys_openat+0x2ae/0x310 fs/open.c:1244 __ia32_compat_sys_openat+0x56/0x70 fs/open.c:1244 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline] __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:141 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:166 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:209 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c =====================================================