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:2/926 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:5321 [syz.0.0] notify_change+0xbca/0xe90 fs/attr.c:552 gfs2: fsid=syz:syz.0: H: s:?? f:naEWs e:-1 p:0 [(none)] 0x0 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: 60928 PID: 5320 Comm: syz.0.0 Not tainted 6.14.0-rc6-syzkaller-00007-g0b46b049d6ec #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 0e 44 0f 0c 01 48 c7 c7 a0 5a 6f 8c be 53 03 00 00 48 c7 c2 e0 5a 6f 8c e8 77 91 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:ffffc9000d0e7040 EFLAGS: 00010202 RAX: ffffffff8417a7e1 RBX: 0000000000000001 RCX: ffff888000224880 RDX: 0000000000000000 RSI: ffffffff8c810000 RDI: ffffffff8c80ffc0 RBP: ffffc9000d0e7330 R08: ffffffff8417a7ca R09: 1ffffffff28a9908 R10: dffffc0000000000 R11: fffffbfff28a9909 R12: 0000000000000004 R13: 0000000000000001 R14: 0000000000000021 R15: dffffc0000000000 FS: 00007fb18070e6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000000000 CR3: 00000000351be000 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] gfs2_mmap+0x28c/0x2e0 fs/gfs2/file.c:606 call_mmap include/linux/fs.h:2245 [inline] mmap_file mm/internal.h:124 [inline] __mmap_new_file_vma mm/vma.c:2296 [inline] __mmap_new_vma mm/vma.c:2360 [inline] __mmap_region mm/vma.c:2461 [inline] mmap_region+0x247c/0x2fa0 mm/vma.c:2539 do_mmap+0xecc/0x13a0 mm/mmap.c:561 vm_mmap_pgoff+0x214/0x430 mm/util.c:575 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:607 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: 0033:0x7fb17f98d169 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:00007fb18070e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fb17fba5fa0 RCX: 00007fb17f98d169 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000400000000000 RBP: 00007fb17fa0e2a0 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb17fba5fa0 R15: 00007fff1f9d2118 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 0e 44 0f 0c 01 48 c7 c7 a0 5a 6f 8c be 53 03 00 00 48 c7 c2 e0 5a 6f 8c e8 77 91 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:ffffc9000d0e7040 EFLAGS: 00010202 RAX: ffffffff8417a7e1 RBX: 0000000000000001 RCX: ffff888000224880 RDX: 0000000000000000 RSI: ffffffff8c810000 RDI: ffffffff8c80ffc0 RBP: ffffc9000d0e7330 R08: ffffffff8417a7ca R09: 1ffffffff28a9908 R10: dffffc0000000000 R11: fffffbfff28a9909 R12: 0000000000000004 R13: 0000000000000001 R14: 0000000000000021 R15: dffffc0000000000 FS: 00007fb18070e6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000000000 CR3: 00000000351be000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c6 05 0e 44 0f 0c 01 movb $0x1,0xc0f440e(%rip) # 0xc0f4415 7: 48 c7 c7 a0 5a 6f 8c mov $0xffffffff8c6f5aa0,%rdi e: be 53 03 00 00 mov $0x353,%esi 13: 48 c7 c2 e0 5a 6f 8c mov $0xffffffff8c6f5ae0,%rdx 1a: e8 77 91 85 fd call 0xfd859196 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