syzbot has found a reproducer for the following issue on: HEAD commit: 9c0826a5d9aa Add linux-next specific files for 20251107 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11c44b42580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f2ebeee52bf052b8 dashboard link: https://syzkaller.appspot.com/bug?extid=f5d91b1897d5b094c6b4 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16263084580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14496a92580000
Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/32b5c04a0baa/disk-9c0826a5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9438206c142a/vmlinux-9c0826a5.xz kernel image: https://storage.googleapis.com/syzbot-assets/129cd0208baa/bzImage-9c0826a5.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/be89fc48acf0/mount_3.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] loop0: detected capacity change from 0 to 4096 ntfs3(loop0): Different NTFS sector size (1024) and media sector size (512). ------------[ cut here ]------------ WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278, CPU#1: syz.0.541/6553 Modules linked in: CPU: 1 UID: 0 PID: 6553 Comm: syz.0.541 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278 Code: 83 c4 f8 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 ee 01 00 00 44 89 65 00 49 83 c5 08 eb 13 e8 87 47 1f 00 90 <0f> 0b 90 eb 05 e8 7c 47 1f 00 45 31 ed 4c 89 e8 48 83 c4 28 5b 41 RSP: 0018:ffffc9000c0eec40 EFLAGS: 00010293 RAX: ffffffff81a238a9 RBX: 00003fffffffffff RCX: ffff888026123d00 RDX: 0000000000000000 RSI: 00003fffffffffff RDI: 0000000000000000 RBP: 0000000000000012 R08: 0000000000000f4d R09: 0000003b6994bf6b R10: 0000003b6994bf6b R11: 0000199962000021 R12: 0000000000000012 R13: 0000000000000000 R14: ffffc9000c0eed88 R15: 1ffffffff1bca6c2 FS: 000055557ac66500(0000) GS:ffff888125fc2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffec7fad000 CR3: 000000002ea20000 CR4: 00000000003526f0 Call Trace: <TASK> copy_data kernel/printk/printk_ringbuffer.c:1857 [inline] prb_read kernel/printk/printk_ringbuffer.c:1966 [inline] _prb_read_valid+0x672/0xa90 kernel/printk/printk_ringbuffer.c:2143 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2215 printk_get_next_message+0x15c/0x7b0 kernel/printk/printk.c:2978 console_emit_next_record kernel/printk/printk.c:3062 [inline] console_flush_one_record kernel/printk/printk.c:3194 [inline] console_flush_all+0x4cc/0xb10 kernel/printk/printk.c:3268 __console_flush_and_unlock kernel/printk/printk.c:3298 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3338 vprintk_emit+0x4c5/0x590 kernel/printk/printk.c:2423 _printk+0xcf/0x120 kernel/printk/printk.c:2448 ntfs_inode_printk+0x5fd/0x700 fs/ntfs3/super.c:156 ntfs_bad_inode+0x71/0x150 fs/ntfs3/fsntfs.c:910 mi_enum_attr+0x7b9/0x9f0 fs/ntfs3/record.c:352 ntfs_read_mft fs/ntfs3/inode.c:123 [inline] ntfs_iget5+0x245b/0x3860 fs/ntfs3/inode.c:542 ntfs_fill_super+0x23ce/0x43d0 fs/ntfs3/super.c:1284 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692 vfs_get_tree+0x92/0x2b0 fs/super.c:1752 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3641 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3717 do_mount fs/namespace.c:4040 [inline] __do_sys_mount fs/namespace.c:4228 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4205 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6530f90e6a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffec7fac3c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffec7fac450 RCX: 00007f6530f90e6a RDX: 00002000000002c0 RSI: 0000200000000040 RDI: 00007ffec7fac410 RBP: 00002000000002c0 R08: 00007ffec7fac450 R09: 0000000000000082 R10: 0000000000000082 R11: 0000000000000246 R12: 0000200000000040 R13: 00007ffec7fac410 R14: 000000000001f853 R15: 00002000000000c0 </TASK> --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
