Hello, syzbot found the following issue on: HEAD commit: 850925a8133c Merge tag '9p-for-6.12-rc5' of https://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17192940580000 kernel config: https://syzkaller.appspot.com/x/.config?x=309bb816d40abc28 dashboard link: https://syzkaller.appspot.com/bug?extid=404b4b745080b6210c6c compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10992940580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1503cca7980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-850925a8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c831c931f29c/vmlinux-850925a8.xz kernel image: https://storage.googleapis.com/syzbot-assets/85f584e52a7f/bzImage-850925a8.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+404b4b745080b6210c6c@xxxxxxxxxxxxxxxxxxxxxxxxx R10: 0000000000000002 R11: 0000000000000246 R12: 00007f40bfa2741c R13: 00007ffe565206f0 R14: 00007f40bfa2a5a1 R15: 0000000000000001 </TASK> ------------[ cut here ]------------ kernel BUG at lib/iov_iter.c:624! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5311 Comm: syz-executor145 Not tainted 6.12.0-rc4-syzkaller-00261-g850925a8133c #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:iov_iter_revert+0x420/0x590 lib/iov_iter.c:624 Code: 42 80 3c 20 00 48 8b 1c 24 74 08 48 89 df e8 17 07 43 fd 4c 89 2b e9 04 01 00 00 45 85 ed 48 8b 3c 24 75 16 e8 41 48 d9 fc 90 <0f> 0b 41 83 fd 05 48 8b 3c 24 0f 84 58 01 00 00 48 89 f8 48 c1 e8 RSP: 0018:ffffc9000d09f740 EFLAGS: 00010293 RAX: ffffffff84bba22f RBX: 000000000001e098 RCX: ffff88801f03a440 RDX: 0000000000000000 RSI: ffffffff8f098180 RDI: ffff888048077cf0 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff84bb9f14 R10: 0000000000000004 R11: ffff88801f03a440 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888048077ce0 R15: fffffffffffe1f68 FS: 000055556a75b380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555bd33aafa0 CR3: 0000000041784000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> netfs_reset_iter+0xce/0x130 fs/netfs/misc.c:133 netfs_clear_unread fs/netfs/read_collect.c:22 [inline] netfs_read_subreq_terminated+0x1fe/0xad0 fs/netfs/read_collect.c:491 netfs_read_to_pagecache+0x628/0x900 fs/netfs/buffered_read.c:306 netfs_readahead+0x7e9/0x9d0 fs/netfs/buffered_read.c:421 read_pages+0x17e/0x840 mm/readahead.c:160 page_cache_ra_unbounded+0x774/0x8a0 mm/readahead.c:290 do_page_cache_ra mm/readahead.c:320 [inline] force_page_cache_ra+0x280/0x2f0 mm/readahead.c:349 force_page_cache_readahead mm/internal.h:357 [inline] generic_fadvise+0x522/0x830 mm/fadvise.c:106 ksys_readahead mm/readahead.c:695 [inline] __do_sys_readahead mm/readahead.c:703 [inline] __se_sys_readahead mm/readahead.c:701 [inline] __x64_sys_readahead+0x1ac/0x230 mm/readahead.c:701 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: 0033:0x7f40bf9e5689 Code: 48 83 c4 28 c3 e8 17 1a 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe565206c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bb RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f40bf9e5689 RDX: 000800000000000d RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f40bfa273ee R08: 00007ffe56520466 R09: 0000550032313335 R10: 0000000000000002 R11: 0000000000000246 R12: 00007f40bfa2741c R13: 00007ffe565206f0 R14: 00007f40bfa2a5a1 R15: 0000000000000001 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:iov_iter_revert+0x420/0x590 lib/iov_iter.c:624 Code: 42 80 3c 20 00 48 8b 1c 24 74 08 48 89 df e8 17 07 43 fd 4c 89 2b e9 04 01 00 00 45 85 ed 48 8b 3c 24 75 16 e8 41 48 d9 fc 90 <0f> 0b 41 83 fd 05 48 8b 3c 24 0f 84 58 01 00 00 48 89 f8 48 c1 e8 RSP: 0018:ffffc9000d09f740 EFLAGS: 00010293 RAX: ffffffff84bba22f RBX: 000000000001e098 RCX: ffff88801f03a440 RDX: 0000000000000000 RSI: ffffffff8f098180 RDI: ffff888048077cf0 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff84bb9f14 R10: 0000000000000004 R11: ffff88801f03a440 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888048077ce0 R15: fffffffffffe1f68 FS: 000055556a75b380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555bd33aafa0 CR3: 0000000041784000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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 syzkaller@xxxxxxxxxxxxxxxx. 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 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. 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
