syzbot


WARNING in fsnotify_file_area_perm

Status: upstream: reported C repro on 2025/02/06 09:59
Subsystems: xfs
[Documentation on labels]
Reported-by: syzbot+7229071b47908b19d5b7@syzkaller.appspotmail.com
Fix commit: 955fbe0ef19d Revert "fsnotify: generate pre-content permission event on page fault"
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-arm32 ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-linux-next-kasan-gce-root ci2-upstream-usb]
First crash: 53d, last: 12d
Discussions (4)
Title Replies (including bot) Last reply
[PATCH v3 4/6] Revert "fsnotify: generate pre-content permission event on page fault" 1 (1) 2025/03/12 07:38
[PATCH 2/2] fsnotify: avoid pre-content events when faulting in user pages 2 (2) 2025/03/11 12:37
[PATCH 2/2] fsnotify: avoid pre-content events when faulting in user pages 3 (3) 2025/03/10 09:22
[syzbot] [mm?] WARNING in fsnotify_file_area_perm 15 (20) 2025/03/09 16:20
Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/03/09 15:03 27m amir73il@gmail.com https://github.com/amir73il/linux fsnotify-mmap OK log
2025/03/07 16:22 25m amir73il@gmail.com https://github.com/amir73il/linux fsnotify-fixes OK log
2025/03/07 16:07 11m amir73il@gmail.com patch https://github.com/amir73il/linux fsnotify-fixes error

Sample crash report:
XFS (loop0): Mounting V5 Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791
XFS (loop0): Ending clean mount
XFS (loop0): Quotacheck needed: Please wait.
XFS (loop0): Quotacheck: Done.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6440 at ./include/linux/fsnotify.h:145 fsnotify_file_area_perm+0x20c/0x25c include/linux/fsnotify.h:145
Modules linked in:
CPU: 1 UID: 0 PID: 6440 Comm: syz-executor370 Not tainted 6.14.0-rc4-syzkaller-ge056da87c780 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : fsnotify_file_area_perm+0x20c/0x25c include/linux/fsnotify.h:145
lr : fsnotify_file_area_perm+0x20c/0x25c include/linux/fsnotify.h:145
sp : ffff8000a42569d0
x29: ffff8000a42569d0 x28: ffff0000dcec1b48 x27: ffff0000d68a1708
x26: ffff0000d68a16c0 x25: dfff800000000000 x24: 0000000000008000
x23: 0000000000000001 x22: ffff8000a4256b00 x21: 0000000000001000
x20: 0000000000000010 x19: ffff0000d68a16c0 x18: ffff8000a42566e0
x17: 000000000000e388 x16: ffff800080466c24 x15: 0000000000000001
x14: 1fffe0001b31513c x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c6d98000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : 0000000000001000
x2 : ffff8000a4256b00 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 fsnotify_file_area_perm+0x20c/0x25c include/linux/fsnotify.h:145 (P)
 filemap_fault+0x12b0/0x1518 mm/filemap.c:3509
 xfs_filemap_fault+0xc4/0x194 fs/xfs/xfs_file.c:1543
 __do_fault+0xf8/0x498 mm/memory.c:4988
 do_read_fault mm/memory.c:5403 [inline]
 do_fault mm/memory.c:5537 [inline]
 do_pte_missing mm/memory.c:4058 [inline]
 handle_pte_fault+0x3504/0x57b0 mm/memory.c:5900
 __handle_mm_fault mm/memory.c:6043 [inline]
 handle_mm_fault+0xfa8/0x188c mm/memory.c:6212
 do_page_fault+0x570/0x10a8 arch/arm64/mm/fault.c:690
 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:783
 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:919
 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:432
 el1h_64_sync_handler+0x60/0xcc arch/arm64/kernel/entry-common.c:510
 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:595
 __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:169 [inline] (P)
 fault_in_readable+0x168/0x310 mm/gup.c:2234 (P)
 fault_in_iov_iter_readable+0x1dc/0x22c lib/iov_iter.c:94
 iomap_write_iter fs/iomap/buffered-io.c:950 [inline]
 iomap_file_buffered_write+0x490/0xd54 fs/iomap/buffered-io.c:1039
 xfs_file_buffered_write+0x2dc/0xac8 fs/xfs/xfs_file.c:792
 xfs_file_write_iter+0x2c4/0x6ac fs/xfs/xfs_file.c:881
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x704/0xa9c fs/read_write.c:679
 ksys_pwrite64 fs/read_write.c:786 [inline]
 __do_sys_pwrite64 fs/read_write.c:794 [inline]
 __se_sys_pwrite64 fs/read_write.c:791 [inline]
 __arm64_sys_pwrite64+0x188/0x220 fs/read_write.c:791
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp:

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/02 16:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e056da87c780 c3901742 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 WARNING in fsnotify_file_area_perm
2025/03/15 09:15 upstream 83158b21ae9a e2826670 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in fsnotify_file_area_perm
2025/03/09 04:06 upstream b7c90e3e717a 163f510d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in fsnotify_file_area_perm
2025/03/08 05:36 upstream 21e4543a2e2f 7e3bd60d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in fsnotify_file_area_perm
2025/03/01 03:29 upstream 276f98efb64a 67cf5345 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in fsnotify_file_area_perm
2025/02/02 09:49 upstream 69e858e0b8b2 568559e4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in fsnotify_file_area_perm
2025/03/13 06:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 78e3fd2b7e4b 1a5d9317 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in fsnotify_file_area_perm
2025/03/04 23:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e056da87c780 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in fsnotify_file_area_perm
2025/03/02 15:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e056da87c780 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in fsnotify_file_area_perm
* Struck through repros no longer work on HEAD.