Hello, syzbot found the following crash on: HEAD commit: 7e634208 Merge tag 'acpi-5.7-rc1-2' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=127ebeb3e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=12205d036cec317f dashboard link: https://syzkaller.appspot.com/bug?extid=77fa5bdb65cc39711820 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1196f257e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c336c7e00000 The bug was bisected to: commit d3b6f23f71670007817a5d59f3fbafab2b794e8c Author: Ritesh Harjani <riteshh@xxxxxxxxxxxxx> Date: Fri Feb 28 09:26:58 2020 +0000 ext4: move ext4_fiemap to use iomap framework bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16c62a57e00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=15c62a57e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=11c62a57e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+77fa5bdb65cc39711820@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: d3b6f23f7167 ("ext4: move ext4_fiemap to use iomap framework") ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7023 at fs/iomap/apply.c:51 iomap_apply+0xa0c/0xcb0 fs/iomap/apply.c:51 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7023 Comm: syz-executor296 Not tainted 5.6.0-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+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:175 [inline] fixup_bug arch/x86/kernel/traps.c:170 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:iomap_apply+0xa0c/0xcb0 fs/iomap/apply.c:51 Code: ff e9 0e fd ff ff e8 23 30 96 ff 0f 0b e9 07 f7 ff ff e8 17 30 96 ff 0f 0b 49 c7 c4 fb ff ff ff e9 35 f9 ff ff e8 04 30 96 ff <0f> 0b 49 c7 c4 fb ff ff ff e9 22 f9 ff ff e8 f1 2f 96 ff 0f 0b e9 RSP: 0018:ffffc90000f87968 EFLAGS: 00010293 RAX: ffff8880a1b00480 RBX: ffffc90000f879c8 RCX: ffffffff81dcf934 RDX: 0000000000000000 RSI: ffffffff81dd016c RDI: 0000000000000007 RBP: 0000000000000000 R08: ffff8880a1b00480 R09: ffffed1015cc70fc R10: ffff8880ae6387db R11: ffffed1015cc70fb R12: 0000000000000000 R13: ffff888085e716b8 R14: 0000000000000000 R15: ffffc90000f87b50 iomap_fiemap+0x184/0x2c0 fs/iomap/fiemap.c:88 _ext4_fiemap+0x178/0x4f0 fs/ext4/extents.c:4860 ovl_fiemap+0x13f/0x200 fs/overlayfs/inode.c:467 ioctl_fiemap fs/ioctl.c:226 [inline] do_vfs_ioctl+0x8d7/0x12d0 fs/ioctl.c:715 ksys_ioctl+0xa3/0x180 fs/ioctl.c:761 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x440309 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff2dba7508 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 RDX: 00000000200003c0 RSI: 00000000c020660b RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90 R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
