CPU: 1 PID: 2534 Comm: syz-executor.1 Not tainted 6.1.0-rc2-syzkaller-61959-gbe8b0d020631 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
RIP: 0010:ext4_dirty_folio+0x140/0x160 fs/ext4/inode.c:3635
Code: 00 00 4c 89 e6 e8 50 57 a8 ff 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 8b 3a e8 4a c8 77 ff 48 85 db 75 cc e8 80 8c fa fe <0f> 0b eb c8 44 89 ef e8 34 c8 77 ff 4d 85 f6 0f 85 75 ff ff ff e8
=====================================================
BUG: KMSAN: uninit-value in show_iret_regs+0x215/0x230 arch/x86/kernel/dumpstack.c:150
 show_iret_regs+0x215/0x230 arch/x86/kernel/dumpstack.c:150
 __show_regs+0x31/0xc90 arch/x86/kernel/process_64.c:74
 show_regs+0x6e/0xd0 arch/x86/kernel/dumpstack.c:469
 __warn+0x242/0x580 kernel/panic.c:618
 report_bug+0x7ff/0xa10 lib/bug.c:198
 handle_bug+0x41/0x70 arch/x86/kernel/traps.c:317
 exc_invalid_op+0x1b/0x50 arch/x86/kernel/traps.c:338
 asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568
 ext4_dirty_folio+0x140/0x160
 folio_mark_dirty+0x1ec/0x260 mm/page-writeback.c:2749
 unpin_user_pages_dirty_lock+0x589/0x870 mm/gup.c:343
 process_vm_rw_single_vec+0x712/0x8f0 mm/process_vm_access.c:126
 process_vm_rw_core mm/process_vm_access.c:215 [inline]
 process_vm_rw+0xabd/0xf80 mm/process_vm_access.c:283
 __do_sys_process_vm_writev mm/process_vm_access.c:303 [inline]
 __se_sys_process_vm_writev mm/process_vm_access.c:298 [inline]
 __ia32_sys_process_vm_writev+0x119/0x1a0 mm/process_vm_access.c:298
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Local variable iloc created at:
 __ext4_mark_inode_dirty+0x56/0x1110 fs/ext4/inode.c:5967
 ext4_dirty_inode+0x179/0x1d0 fs/ext4/inode.c:6010

CPU: 1 PID: 2534 Comm: syz-executor.1 Not tainted 6.1.0-rc2-syzkaller-61959-gbe8b0d020631 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
=====================================================