loop0: detected capacity change from 0 to 131072 F2FS-fs (loop0): Invalid segment/section count (458783, 24 x 150994945) F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop0): invalid crc value F2FS-fs (loop0): f2fs_recover_fsync_data: recovery fsync data, check_only: 0 F2FS-fs (loop0): Try to recover 1th superblock, ret: 0 F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4 netlink: 36 bytes leftover after parsing attributes in process `syz.0.0'. Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:f2fs_dev_is_alloc_blocked fs/f2fs/segment.h:956 [inline] RIP: 0010:get_new_segment fs/f2fs/segment.c:2964 [inline] RIP: 0010:new_curseg+0x1134/0x3580 fs/f2fs/segment.c:3110 Code: e8 e1 d2 ce fd 48 8b 7c 24 30 48 8b 07 49 6b cf 70 4c 8d 34 08 49 83 c6 61 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 73 11 00 00 41 80 3e 00 0f 84 e6 00 00 00 RSP: 0018:ffffc9000dcbf068 EFLAGS: 00010206 RAX: 000000000000000c RBX: 0000000000008000 RCX: dffffc0000000000 RDX: ffffc9000ecda000 RSI: 0000000000031fd7 RDI: ffff888012e1da88 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52001b97dfc R12: ffff888012e52000 R13: 0000000000000004 R14: 0000000000000061 R15: 0000000000000000 FS: 00007f4601a326c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000012a8c000 CR4: 0000000000352ef0 Call Trace: f2fs_allocate_data_block+0x229c/0x43c0 fs/f2fs/segment.c:3979 __allocate_data_block fs/f2fs/data.c:1518 [inline] f2fs_map_blocks+0x1512/0x4c20 fs/f2fs/data.c:1759 f2fs_preallocate_blocks fs/f2fs/file.c:5423 [inline] f2fs_file_write_iter+0x173d/0x2920 fs/f2fs/file.c:5685 iter_file_splice_write+0xa31/0x1240 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1159 splice_direct_to_actor+0x57b/0xcb0 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x195/0x290 fs/splice.c:1228 do_sendfile+0x52e/0x7c0 fs/read_write.c:1371 __do_sys_sendfile64 fs/read_write.c:1432 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4600b9e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4601a31fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f4600e25fa0 RCX: 00007f4600b9e159 RDX: 0000000000000000 RSI: 000000000000000d RDI: 000000000000000c RBP: 00007f4600c35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4600e26038 R14: 00007f4600e25fa0 R15: 00007ffede7ae418 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_dev_is_alloc_blocked fs/f2fs/segment.h:956 [inline] RIP: 0010:get_new_segment fs/f2fs/segment.c:2964 [inline] RIP: 0010:new_curseg+0x1134/0x3580 fs/f2fs/segment.c:3110 Code: e8 e1 d2 ce fd 48 8b 7c 24 30 48 8b 07 49 6b cf 70 4c 8d 34 08 49 83 c6 61 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 73 11 00 00 41 80 3e 00 0f 84 e6 00 00 00 RSP: 0018:ffffc9000dcbf068 EFLAGS: 00010206 RAX: 000000000000000c RBX: 0000000000008000 RCX: dffffc0000000000 RDX: ffffc9000ecda000 RSI: 0000000000031fd7 RDI: ffff888012e1da88 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52001b97dfc R12: ffff888012e52000 R13: 0000000000000004 R14: 0000000000000061 R15: 0000000000000000 FS: 00007f4601a326c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000012a8c000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: e8 e1 d2 ce fd call 0xfdced2e6 5: 48 8b 7c 24 30 mov 0x30(%rsp),%rdi a: 48 8b 07 mov (%rdi),%rax d: 49 6b cf 70 imul $0x70,%r15,%rcx 11: 4c 8d 34 08 lea (%rax,%rcx,1),%r14 15: 49 83 c6 61 add $0x61,%r14 19: 4c 89 f0 mov %r14,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 73 11 00 00 jne 0x11a9 36: 41 80 3e 00 cmpb $0x0,(%r14) 3a: 0f 84 e6 00 00 00 je 0x126