net_ratelimit: 8 callbacks suppressed ip6_tunnel: non-ECT from f7be:790a:da7a:7519:ea30:bdf6:1812:dd27 with DS=0x2 ------------[ cut here ]------------ kernel BUG at fs/buffer.c:553! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 30025 Comm: syz-executor.0 Not tainted 4.19.113-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_buffer_dirty_inode fs/buffer.c:553 [inline] RIP: 0010:mark_buffer_dirty_inode+0x2f8/0x3c0 fs/buffer.c:544 Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4d 48 89 6b 58 4c 89 ef e8 b2 58 6b 05 e9 00 fe ff ff e8 18 3b b3 ff <0f> 0b 4c 89 ff e8 7e 06 e9 ff e9 e5 fd ff ff e8 74 06 e9 ff e9 6e RSP: 0018:ffff88804bc9f668 EFLAGS: 00010216 RAX: 0000000000040000 RBX: ffff8880795fd1f8 RCX: ffffc900060a7000 RDX: 00000000000159fa RSI: ffffffff81b46788 RDI: ffff888039f399b8 RBP: ffff888039f39858 R08: 0000000000000000 R09: 0000000000000004 R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: ffff8880930cea60 R13: 0000000000000000 R14: ffff88804d404380 R15: 0000000000000000 FS: 00007f017e3af700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d625000 CR3: 000000007deea000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fat_free_clusters+0x347/0x8a0 fs/fat/fatent.c:597 fat_free fs/fat/file.c:384 [inline] fat_truncate_blocks+0x780/0xc50 fs/fat/file.c:402 fat_setattr+0x7fa/0xc60 fs/fat/file.c:546 notify_change+0xad7/0xfb0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x29f0/0x4200 fs/namei.c:3537 do_filp_open+0x1a1/0x280 fs/namei.c:3567 do_sys_open+0x3c0/0x500 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c849 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f017e3aec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f017e3af6d4 RCX: 000000000045c849 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000098 R14: 00000000004c32ec R15: 000000000076bfac Modules linked in: ---[ end trace 3a794e29a035fa96 ]--- RIP: 0010:mark_buffer_dirty_inode fs/buffer.c:553 [inline] RIP: 0010:mark_buffer_dirty_inode+0x2f8/0x3c0 fs/buffer.c:544 ip6_tunnel: non-ECT from f7be:790a:da7a:7519:ea30:bdf6:1812:dd27 with DS=0x2 Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4d 48 89 6b 58 4c 89 ef e8 b2 58 6b 05 e9 00 fe ff ff e8 18 3b b3 ff <0f> 0b 4c 89 ff e8 7e 06 e9 ff e9 e5 fd ff ff e8 74 06 e9 ff e9 6e RSP: 0018:ffff88804bc9f668 EFLAGS: 00010216 RAX: 0000000000040000 RBX: ffff8880795fd1f8 RCX: ffffc900060a7000 RDX: 00000000000159fa RSI: ffffffff81b46788 RDI: ffff888039f399b8 RBP: ffff888039f39858 R08: 0000000000000000 R09: 0000000000000004 R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: ffff8880930cea60 R13: 0000000000000000 R14: ffff88804d404380 R15: 0000000000000000 FS: 00007f017e3af700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d039000 CR3: 000000007deea000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400