loop0: detected capacity change from 0 to 32768 gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS (format 1801)... gfs2: fsid=syz:syz.0: journal 0 mapped with 3 extents in 0ms gfs2: fsid=syz:syz.0: first mount done, others may mount gfs2: fsid=syz:syz.0: found 1 quota changes loop0: detected capacity change from 32768 to 0 syz.0.0: attempt to access beyond end of device loop0: rw=12288, sector=16648, nr_sectors = 8 limit=0 gfs2: fsid=syz:syz.0: dirty_inode: glock -5 gfs2: fsid=syz:syz.0: G: s:EX n:2/927 f:yfaqob t:EX d:EX/0 a:0 v:0 r:2 m:20 p:1 gfs2: fsid=syz:syz.0: H: s:EX f:H e:0 p:5326 [syz.0.0] notify_change+0xbca/0xe90 fs/attr.c:552 gfs2: fsid=syz:syz.0: H: s:UN f: e:0 p:0 [(ended)] 0x249143b0807a913d Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted 6.14.0-rc7-syzkaller #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:pid_is_meaningful fs/gfs2/glock.c:1463 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2291 [inline] RIP: 0010:gfs2_dump_glock+0xee4/0x1b80 fs/gfs2/glock.c:2407 Code: c6 05 d4 56 0f 0c 01 48 c7 c7 a0 5b 6f 8c be 53 03 00 00 48 c7 c2 e0 5b 6f 8c e8 77 9e 85 fd 4d 8d 75 20 4d 89 f4 49 c1 ec 03 <43> 0f b6 04 3c 84 c0 0f 85 b1 06 00 00 41 0f b7 1e 89 de 81 e6 00 RSP: 0018:ffffc9000d487500 EFLAGS: 00010202 RAX: ffffffff84179ba1 RBX: 0000000000000001 RCX: 0000000000100000 RDX: ffffc9000e37a000 RSI: 0000000000075fa4 RDI: 0000000000075fa5 RBP: ffffc9000d4877f0 R08: ffffffff84179b8a R09: 1ffffffff28a9908 R10: dffffc0000000000 R11: fffffbfff28a9909 R12: 0000000000000004 R13: 0000000000000000 R14: 0000000000000020 R15: dffffc0000000000 FS: 00007f2112d186c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f210e3f4fe0 CR3: 000000004380e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: gfs2_dirty_inode+0x5a5/0x6b0 fs/gfs2/super.c:512 __mark_inode_dirty+0x2ee/0xe90 fs/fs-writeback.c:2515 generic_update_time+0xad/0xc0 fs/inode.c:2112 gfs2_update_time+0x13a/0x200 fs/gfs2/inode.c:2174 inode_update_time fs/inode.c:2124 [inline] touch_atime+0x27d/0x690 fs/inode.c:2197 file_accessed include/linux/fs.h:2601 [inline] splice_direct_to_actor+0x976/0xc80 fs/splice.c:1126 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1233 do_sendfile+0x564/0x8a0 fs/read_write.c:1363 __do_sys_sendfile64 fs/read_write.c:1424 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1410 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: 0033:0x7f2111f8d169 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:00007f2112d18038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f21121a5fa0 RCX: 00007f2111f8d169 RDX: 0000000000000000 RSI: 000000000000000b RDI: 000000000000000a RBP: 00007f211200e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f21121a5fa0 R15: 00007ffdaa2e56d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1463 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2291 [inline] RIP: 0010:gfs2_dump_glock+0xee4/0x1b80 fs/gfs2/glock.c:2407 Code: c6 05 d4 56 0f 0c 01 48 c7 c7 a0 5b 6f 8c be 53 03 00 00 48 c7 c2 e0 5b 6f 8c e8 77 9e 85 fd 4d 8d 75 20 4d 89 f4 49 c1 ec 03 <43> 0f b6 04 3c 84 c0 0f 85 b1 06 00 00 41 0f b7 1e 89 de 81 e6 00 RSP: 0018:ffffc9000d487500 EFLAGS: 00010202 RAX: ffffffff84179ba1 RBX: 0000000000000001 RCX: 0000000000100000 RDX: ffffc9000e37a000 RSI: 0000000000075fa4 RDI: 0000000000075fa5 RBP: ffffc9000d4877f0 R08: ffffffff84179b8a R09: 1ffffffff28a9908 R10: dffffc0000000000 R11: fffffbfff28a9909 R12: 0000000000000004 R13: 0000000000000000 R14: 0000000000000020 R15: dffffc0000000000 FS: 00007f2112d186c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f210e3f4fe0 CR3: 000000004380e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c6 05 d4 56 0f 0c 01 movb $0x1,0xc0f56d4(%rip) # 0xc0f56db 7: 48 c7 c7 a0 5b 6f 8c mov $0xffffffff8c6f5ba0,%rdi e: be 53 03 00 00 mov $0x353,%esi 13: 48 c7 c2 e0 5b 6f 8c mov $0xffffffff8c6f5be0,%rdx 1a: e8 77 9e 85 fd call 0xfd859e96 1f: 4d 8d 75 20 lea 0x20(%r13),%r14 23: 4d 89 f4 mov %r14,%r12 26: 49 c1 ec 03 shr $0x3,%r12 * 2a: 43 0f b6 04 3c movzbl (%r12,%r15,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 b1 06 00 00 jne 0x6e8 37: 41 0f b7 1e movzwl (%r14),%ebx 3b: 89 de mov %ebx,%esi 3d: 81 .byte 0x81 3e: e6 00 out %al,$0x0