Hello, syzbot found the following issue on:
HEAD commit: 2ccb4d203fe4 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=130b4458580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e0e74def2d38a839 dashboard link: https://syzkaller.appspot.com/bug?extid=24124df3170c3638b35f compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-2ccb4d20.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/749f87aeac3d/vmlinux-2ccb4d20.xz kernel image: https://storage.googleapis.com/syzbot-assets/0c8888fbaabd/bzImage-2ccb4d20.xz 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 131072 F2FS-fs (loop0): f2fs_recover_fsync_data: recovery fsync data, check_only: 0 F2FS-fs (loop0): Mounted with checkpoint version = 1b41e955 F2FS-fs (loop0): access invalid blkaddr:16711680 CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 __f2fs_is_valid_blkaddr+0xe52/0x14f0 fs/f2fs/checkpoint.c:213 f2fs_do_zero_range fs/f2fs/file.c:1647 [inline] f2fs_zero_range+0xef0/0x1580 fs/f2fs/file.c:1737 f2fs_fallocate+0x583/0x990 fs/f2fs/file.c:2030 vfs_fallocate+0x669/0x7e0 fs/open.c:342 ioctl_preallocate fs/ioctl.c:289 [inline] file_ioctl+0x611/0x780 fs/ioctl.c:-1 do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:576 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f07bc58eec9 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:00007f07bd4f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f07bc7e5fa0 RCX: 00007f07bc58eec9 RDX: 0000200000000040 RSI: 0000000040305839 RDI: 0000000000000004 RBP: 00007f07bc611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f07bc7e6038 R14: 00007f07bc7e5fa0 R15: 00007ffdf7c46b18 </TASK> F2FS-fs (loop0): __update_extent_tree_range: extent len is zero, type: 0, extent [0, 0, 0], age [0, 0] ------------[ cut here ]------------ kernel BUG at fs/f2fs/extent_cache.c:678! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__update_extent_tree_range+0x13bc/0x1500 fs/f2fs/extent_cache.c:678 Code: 48 c7 c2 60 62 93 8b 48 c7 c1 a4 09 6c 8d 44 8b 44 24 0c 4c 8b 4c 24 30 41 ff 37 41 56 6a 00 53 e8 89 09 ef ff 48 83 c4 20 90 <0f> 0b f3 0f 1e fa 65 44 8b 3d 5a 3e 2e 0e bf 07 00 00 00 44 89 fe RSP: 0018:ffffc9000d47f4e0 EFLAGS: 00010282 RAX: 2b7eb175dbc53d00 RBX: 0000000000000000 RCX: 2b7eb175dbc53d00 RDX: ffffc9000e052000 RSI: 00000000000125e2 RDI: 00000000000125e3 RBP: ffffc9000d47f6b0 R08: ffffc9000d47f0a7 R09: 1ffff92001a8fe14 R10: dffffc0000000000 R11: fffff52001a8fe15 R12: 1ffff92001a8fec0 R13: ffff8880123b9ae8 R14: 0000000000000000 R15: ffffc9000d47f6d8 FS: 00007f07bd4f26c0(0000) GS:ffff88808d97f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f54bb84ad50 CR3: 00000000420fe000 CR4: 0000000000352ef0 Call Trace: <TASK> f2fs_update_read_extent_cache_range+0x192/0x3e0 fs/f2fs/extent_cache.c:1085 f2fs_do_zero_range fs/f2fs/file.c:1657 [inline] f2fs_zero_range+0x10c1/0x1580 fs/f2fs/file.c:1737 f2fs_fallocate+0x583/0x990 fs/f2fs/file.c:2030 vfs_fallocate+0x669/0x7e0 fs/open.c:342 ioctl_preallocate fs/ioctl.c:289 [inline] file_ioctl+0x611/0x780 fs/ioctl.c:-1 do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:576 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f07bc58eec9 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:00007f07bd4f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f07bc7e5fa0 RCX: 00007f07bc58eec9 RDX: 0000200000000040 RSI: 0000000040305839 RDI: 0000000000000004 RBP: 00007f07bc611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f07bc7e6038 R14: 00007f07bc7e5fa0 R15: 00007ffdf7c46b18 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__update_extent_tree_range+0x13bc/0x1500 fs/f2fs/extent_cache.c:678 Code: 48 c7 c2 60 62 93 8b 48 c7 c1 a4 09 6c 8d 44 8b 44 24 0c 4c 8b 4c 24 30 41 ff 37 41 56 6a 00 53 e8 89 09 ef ff 48 83 c4 20 90 <0f> 0b f3 0f 1e fa 65 44 8b 3d 5a 3e 2e 0e bf 07 00 00 00 44 89 fe RSP: 0018:ffffc9000d47f4e0 EFLAGS: 00010282 RAX: 2b7eb175dbc53d00 RBX: 0000000000000000 RCX: 2b7eb175dbc53d00 RDX: ffffc9000e052000 RSI: 00000000000125e2 RDI: 00000000000125e3 RBP: ffffc9000d47f6b0 R08: ffffc9000d47f0a7 R09: 1ffff92001a8fe14 R10: dffffc0000000000 R11: fffff52001a8fe15 R12: 1ffff92001a8fec0 R13: ffff8880123b9ae8 R14: 0000000000000000 R15: ffffc9000d47f6d8 FS: 00007f07bd4f26c0(0000) GS:ffff88808d97f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f07bd4d19a0 CR3: 00000000420fe000 CR4: 0000000000352ef0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at [email protected]. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
