loop0: detected capacity change from 0 to 32768 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode. (syz.0.0,5312,0):ocfs2_dio_end_io:2398 ERROR: Direct IO failed, bytes = -28 (syz.0.0,5312,0):ocfs2_extend_trans:460 ERROR: status = -30 (syz.0.0,5312,0):ocfs2_try_to_merge_extent:3817 ERROR: status = -30 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5312 Comm: syz.0.0 Not tainted 6.15.0-rc7-syzkaller-00152-gd0c22de9995b #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:jbd2_handle_buffer_credits include/linux/jbd2.h:-1 [inline] RIP: 0010:ocfs2_assure_trans_credits+0x7d/0x370 fs/ocfs2/journal.c:479 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 97 2e 87 fe 4d 8b 3e eb 08 e8 6d 33 25 fe 4d 89 f7 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 74 2e 87 fe 4d 8b 3f 49 8d 7e 10 RSP: 0018:ffffc9000d586ce8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000000000000d RCX: 0000000000100000 RDX: ffffc9000deb2000 RSI: 00000000000508c2 RDI: 00000000000508c3 RBP: 0000000000000000 R08: ffff88801ecf8000 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff92001ab0db0 R13: dffffc0000000000 R14: ffff8880551b6e18 R15: 0000000000000000 FS: 00007fa9e1ae06c0(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000003fa0d000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2342 [inline] ocfs2_dio_end_io+0xafb/0x10f0 fs/ocfs2/aops.c:2401 dio_complete+0x258/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2cd4/0x3310 fs/direct-io.c:1303 ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2438 generic_file_direct_write+0x1d8/0x3e0 mm/filemap.c:4037 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4206 ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469 iter_file_splice_write+0x93a/0x1000 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0xfe/0x160 fs/splice.c:1158 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1227 do_sendfile+0x4da/0x7d0 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1429 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1415 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa9e0b8e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa9e1ae0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fa9e0db5fa0 RCX: 00007fa9e0b8e969 RDX: 0000000000000000 RSI: 000000000000000b RDI: 000000000000000c RBP: 00007fa9e0c10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000080000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa9e0db5fa0 R15: 00007ffd65a0a798 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:jbd2_handle_buffer_credits include/linux/jbd2.h:-1 [inline] RIP: 0010:ocfs2_assure_trans_credits+0x7d/0x370 fs/ocfs2/journal.c:479 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 97 2e 87 fe 4d 8b 3e eb 08 e8 6d 33 25 fe 4d 89 f7 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 74 2e 87 fe 4d 8b 3f 49 8d 7e 10 RSP: 0018:ffffc9000d586ce8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000000000000d RCX: 0000000000100000 RDX: ffffc9000deb2000 RSI: 00000000000508c2 RDI: 00000000000508c3 RBP: 0000000000000000 R08: ffff88801ecf8000 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff92001ab0db0 R13: dffffc0000000000 R14: ffff8880551b6e18 R15: 0000000000000000 FS: 00007fa9e1ae06c0(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000003fa0d000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 89 f0 mov %r14,%rax 3: 48 c1 e8 03 shr $0x3,%rax 7: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) c: 74 08 je 0x16 e: 4c 89 f7 mov %r14,%rdi 11: e8 97 2e 87 fe call 0xfe872ead 16: 4d 8b 3e mov (%r14),%r15 19: eb 08 jmp 0x23 1b: e8 6d 33 25 fe call 0xfe25338d 20: 4d 89 f7 mov %r14,%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ff mov %r15,%rdi 34: e8 74 2e 87 fe call 0xfe872ead 39: 4d 8b 3f mov (%r15),%r15 3c: 49 8d 7e 10 lea 0x10(%r14),%rdi