===================================================== BUG: KMSAN: uninit-value in ext4_inode_journal_mode+0x28b/0x4f0 fs/ext4/ext4_jbd2.c:16 CPU: 0 PID: 8533 Comm: syz-executor.0 Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 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:467 [inline] ext4_evict_inode+0x1bb/0x2b30 fs/ext4/inode.c:201 evict+0x4b5/0xec0 fs/inode.c:578 iput_final fs/inode.c:1654 [inline] iput+0xb06/0xec0 fs/inode.c:1680 __ext4_new_inode+0x3dd2/0x9c70 fs/ext4/ialloc.c:1354 ext4_create+0x47e/0x960 fs/ext4/namei.c:2619 lookup_open fs/namei.c:3104 [inline] open_last_lookups fs/namei.c:3178 [inline] path_openat+0x2b71/0x6a30 fs/namei.c:3366 do_filp_open+0x2b8/0x710 fs/namei.c:3396 do_sys_openat2+0xa92/0x1150 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_compat_sys_openat fs/open.c:1242 [inline] __se_compat_sys_openat+0x2ae/0x310 fs/open.c:1240 __ia32_compat_sys_openat+0x56/0x70 fs/open.c:1240 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7ff1549 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:00000000f55a95fc EFLAGS: 00000296 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000200004c0 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:4989 alloc_pages_current+0x7b6/0xb60 mm/mempolicy.c:2271 alloc_pages include/linux/gfp.h:547 [inline] alloc_slab_page mm/slub.c:1630 [inline] allocate_slab+0x346/0x11a0 mm/slub.c:1773 new_slab mm/slub.c:1834 [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:2871 [inline] slab_alloc mm/slub.c:2915 [inline] kmem_cache_alloc+0xb71/0x1040 mm/slub.c:2920 ext4_alloc_inode+0x5e/0x870 fs/ext4/super.c:1294 alloc_inode fs/inode.c:234 [inline] new_inode_pseudo+0xa7/0x580 fs/inode.c:930 new_inode+0x5a/0x3d0 fs/inode.c:959 __ext4_new_inode+0x3a0/0x9c70 fs/ext4/ialloc.c:956 ext4_symlink+0x8a4/0x19a0 fs/ext4/namei.c:3336 vfs_symlink+0x6c4/0x8f0 fs/namei.c:3960 do_symlinkat+0x389/0x930 fs/namei.c:3987 __do_sys_symlink fs/namei.c:4006 [inline] __se_sys_symlink+0x74/0x90 fs/namei.c:4004 __ia32_sys_symlink+0x3e/0x60 fs/namei.c:4004 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c =====================================================