syz.0.0: attempt to access beyond end of device loop0: rw=1, sector=360, nr_sectors = 8 limit=0 metapage_write_end_io: I/O error ERROR: (device loop0): release_metapage: metapage_write_one() failed syz.0.0: attempt to access beyond end of device loop0: rw=0, sector=64, nr_sectors = 8 limit=0 ERROR: (device loop0): remounting filesystem as read-only lbmIODone: I/O error in JFS log Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:metapage_write_folio+0xab/0xf20 fs/jfs/jfs_metapage.c:346 Code: 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 97 f5 d2 fe 4c 8d b4 24 b0 00 00 00 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 76 f5 d2 fe 48 8b 03 48 89 44 24 RSP: 0018:ffffc9000d4872a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000ec7b000 RSI: 0000000000004a7b RDI: 0000000000004a7c RBP: ffffc9000d4873b0 R08: ffffea0000ea6137 R09: 1ffffd40001d4c26 R10: dffffc0000000000 R11: fffff940001d4c27 R12: 1ffff92001a90e60 R13: dffffc0000000000 R14: ffffc9000d487350 R15: ffffea0000ea6100 FS: 00007f31a6fcf6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f31a6fcefe0 CR3: 0000000041f34000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: metapage_write_one+0x292/0x4b0 fs/jfs/jfs_metapage.c:710 force_metapage+0x1ae/0x370 fs/jfs/jfs_metapage.c:732 txForce fs/jfs/jfs_txnmgr.c:2215 [inline] txCommit+0x6250/0x6b90 fs/jfs/jfs_txnmgr.c:1315 diNewIAG fs/jfs/jfs_imap.c:2592 [inline] diAllocExt fs/jfs/jfs_imap.c:1905 [inline] diAllocAG+0x17ab/0x1e50 fs/jfs/jfs_imap.c:1669 diAlloc+0x1d2/0x1630 fs/jfs/jfs_imap.c:1590 ialloc+0x8f/0x900 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x1c5/0xba0 fs/jfs/namei.c:225 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4311 do_mkdirat+0x264/0x3a0 fs/namei.c:4334 __do_sys_mkdirat fs/namei.c:4349 [inline] __se_sys_mkdirat fs/namei.c:4347 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f31a6185d29 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:00007f31a6fcf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f31a6376080 RCX: 00007f31a6185d29 RDX: 0000000000000000 RSI: 00000000200005c0 RDI: ffffffffffffff9c RBP: 00007f31a6201b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f31a6376080 R15: 00007fff030e7cb8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:metapage_write_folio+0xab/0xf20 fs/jfs/jfs_metapage.c:346 Code: 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 97 f5 d2 fe 4c 8d b4 24 b0 00 00 00 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 76 f5 d2 fe 48 8b 03 48 89 44 24 RSP: 0018:ffffc9000d4872a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000ec7b000 RSI: 0000000000004a7b RDI: 0000000000004a7c RBP: ffffc9000d4873b0 R08: ffffea0000ea6137 R09: 1ffffd40001d4c26 R10: dffffc0000000000 R11: fffff940001d4c27 R12: 1ffff92001a90e60 R13: dffffc0000000000 R14: ffffc9000d487350 R15: ffffea0000ea6100 FS: 00007f31a6fcf6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000101c CR3: 0000000041f34000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 5f pop %rdi 1: 18 48 89 sbb %cl,-0x77(%rax) 4: d8 48 c1 fmuls -0x3f(%rax) 7: e8 03 42 80 3c call 0x3c80420f c: 28 00 sub %al,(%rax) e: 74 08 je 0x18 10: 48 89 df mov %rbx,%rdi 13: e8 97 f5 d2 fe call 0xfed2f5af 18: 4c 8d b4 24 b0 00 00 lea 0xb0(%rsp),%r14 1f: 00 20: 48 8b 1b mov (%rbx),%rbx 23: 48 89 d8 mov %rbx,%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: 48 89 df mov %rbx,%rdi 34: e8 76 f5 d2 fe call 0xfed2f5af 39: 48 8b 03 mov (%rbx),%rax 3c: 48 rex.W 3d: 89 .byte 0x89 3e: 44 rex.R 3f: 24 .byte 0x24