Hello, syzbot found the following issue on: HEAD commit: 3e5e6c9900c3 Merge tag 'nfsd-6.12-3' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a96b40580000 kernel config: https://syzkaller.appspot.com/x/.config?x=672325e7ab17fdf7 dashboard link: https://syzkaller.appspot.com/bug?extid=acb4e7a57eadb542630f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-3e5e6c99.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7df898d050b2/vmlinux-3e5e6c99.xz kernel image: https://storage.googleapis.com/syzbot-assets/630f9b55fdbc/bzImage-3e5e6c99.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+acb4e7a57eadb542630f@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 4096 ntfs3(loop0): Different NTFS sector size (4096) and media sector size (512). BUG: unable to handle page fault for address: ffffed1103eab90f #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 5ffcd067 P4D 5ffcd067 PUD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 16895 PID: 5323 Comm: syz.0.0 Not tainted 6.12.0-rc5-syzkaller-00308-g3e5e6c9900c3 #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:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline] RIP: 0010:tif_need_resched include/linux/thread_info.h:184 [inline] RIP: 0010:need_resched include/linux/sched.h:2108 [inline] RIP: 0010:__schedule_loop kernel/sched/core.c:6769 [inline] RIP: 0010:schedule+0x155/0x320 kernel/sched/core.c:6782 Code: c1 eb 03 eb 0a 48 f7 45 00 08 00 00 00 74 2c bf 01 00 00 00 e8 ec e9 93 f5 31 ff e8 d5 b2 ff ff bf 01 00 00 00 e8 7b eb 93 f5 <42> 80 3c 23 00 74 d4 48 89 ef e8 bc 54 2f f6 eb ca 4c 8d 75 2c 4d RSP: 0018:ffffc90001797150 EFLAGS: 00010297 RAX: 0000000080000001 RBX: 1ffff11003eab910 RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88801f55c880 R08: ffff888000ee5f03 R09: 1ffff110001dcbe0 R10: dffffc0000000000 R11: ffffed10001dcbe1 R12: dffffc00ffffffff R13: 0000000000000000 R14: ffffffff8bcf4350 R15: ffff88801f55daf8 FS: 00007fcccefc56c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed1103eab90f CR3: 000000003e6da000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> io_schedule+0x8d/0x110 kernel/sched/core.c:7574 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1309 __filemap_get_folio+0xaf/0xbd0 mm/filemap.c:1900 filemap_lock_folio include/linux/pagemap.h:788 [inline] collapse_file mm/khugepaged.c:1895 [inline] hpage_collapse_scan_file+0x1d07/0x6880 mm/khugepaged.c:2317 madvise_collapse+0x602/0xd30 mm/khugepaged.c:2759 madvise_vma_behavior mm/madvise.c:1100 [inline] madvise_walk_vmas mm/madvise.c:1274 [inline] do_madvise+0xce7/0x4700 mm/madvise.c:1461 __do_sys_madvise mm/madvise.c:1477 [inline] __se_sys_madvise mm/madvise.c:1475 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1475 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: 0033:0x7fccce17e719 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:00007fcccefc5038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fccce335f80 RCX: 00007fccce17e719 RDX: 0000000000000019 RSI: 0000000000800000 RDI: 00000000207fe000 RBP: 00007fccce1f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fccce335f80 R15: 00007ffedc3723c8 </TASK> Modules linked in: CR2: ffffed1103eab90f ---[ end trace 0000000000000000 ]--- RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline] RIP: 0010:tif_need_resched include/linux/thread_info.h:184 [inline] RIP: 0010:need_resched include/linux/sched.h:2108 [inline] RIP: 0010:__schedule_loop kernel/sched/core.c:6769 [inline] RIP: 0010:schedule+0x155/0x320 kernel/sched/core.c:6782 Code: c1 eb 03 eb 0a 48 f7 45 00 08 00 00 00 74 2c bf 01 00 00 00 e8 ec e9 93 f5 31 ff e8 d5 b2 ff ff bf 01 00 00 00 e8 7b eb 93 f5 <42> 80 3c 23 00 74 d4 48 89 ef e8 bc 54 2f f6 eb ca 4c 8d 75 2c 4d RSP: 0018:ffffc90001797150 EFLAGS: 00010297 RAX: 0000000080000001 RBX: 1ffff11003eab910 RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88801f55c880 R08: ffff888000ee5f03 R09: 1ffff110001dcbe0 R10: dffffc0000000000 R11: ffffed10001dcbe1 R12: dffffc00ffffffff R13: 0000000000000000 R14: ffffffff8bcf4350 R15: ffff88801f55daf8 FS: 00007fcccefc56c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed1103eab90f CR3: 000000003e6da000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c1 eb 03 shr $0x3,%ebx 3: eb 0a jmp 0xf 5: 48 f7 45 00 08 00 00 testq $0x8,0x0(%rbp) c: 00 d: 74 2c je 0x3b f: bf 01 00 00 00 mov $0x1,%edi 14: e8 ec e9 93 f5 call 0xf593ea05 19: 31 ff xor %edi,%edi 1b: e8 d5 b2 ff ff call 0xffffb2f5 20: bf 01 00 00 00 mov $0x1,%edi 25: e8 7b eb 93 f5 call 0xf593eba5 * 2a: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1) <-- trapping instruction 2f: 74 d4 je 0x5 31: 48 89 ef mov %rbp,%rdi 34: e8 bc 54 2f f6 call 0xf62f54f5 39: eb ca jmp 0x5 3b: 4c 8d 75 2c lea 0x2c(%rbp),%r14 3f: 4d rex.WRB --- This report is generated by a bot. 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