Hello, syzbot found the following issue on: HEAD commit: 3c4aa4434377 Merge tag 'ceph-for-6.4-rc1' of https://githu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=170c6870280000 kernel config: https://syzkaller.appspot.com/x/.config?x=87f9126139666d37 dashboard link: https://syzkaller.appspot.com/bug?extid=8fab910f890e17016919 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-3c4aa443.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1c522f5ebcfe/vmlinux-3c4aa443.xz kernel image: https://storage.googleapis.com/syzbot-assets/b923244383b5/bzImage-3c4aa443.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8fab910f890e17016919@xxxxxxxxxxxxxxxxxxxxxxxxx kswapd+0x677/0xd60 mm/vmscan.c:7727 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 ------------[ cut here ]------------ kernel BUG at include/linux/mm.h:996! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 5174 Comm: syz-executor.3 Not tainted 6.3.0-syzkaller-13091-g3c4aa4434377 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:put_page_testzero include/linux/mm.h:996 [inline] RIP: 0010:folio_put_testzero include/linux/mm.h:1002 [inline] RIP: 0010:folio_put include/linux/mm.h:1429 [inline] RIP: 0010:__filemap_get_folio+0x8e2/0x990 mm/filemap.c:1937 Code: e8 b3 20 d3 ff 48 c7 c6 00 b2 56 8a 4c 89 e7 e8 d4 a6 0e 00 0f 0b e8 9d 20 d3 ff 48 c7 c6 00 b2 56 8a 4c 89 e7 e8 be a6 0e 00 <0f> 0b e8 87 20 d3 ff 4c 89 e7 49 c7 c4 f5 ff ff ff e8 f8 44 03 00 RSP: 0018:ffffc900038579a0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff888016a38000 RSI: ffffffff81b13d42 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8e7a71d7 R10: fffffbfff1cf4e3a R11: 0000000000000000 R12: ffffea00007e5b80 R13: ffff8880734a4480 R14: 0000000000000000 R15: ffffea00007e5bb4 FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000581dd380 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f734e1b0 CR3: 0000000071e9b000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> truncate_inode_pages_range+0x350/0xf10 mm/truncate.c:377 hfs_evict_inode+0x1a/0x100 fs/hfs/inode.c:563 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1747 [inline] iput.part.0+0x50a/0x740 fs/inode.c:1773 iput+0x5c/0x80 fs/inode.c:1763 hfs_btree_close+0x282/0x390 fs/hfs/btree.c:158 hfs_mdb_put+0xbf/0x380 fs/hfs/mdb.c:360 generic_shutdown_super+0x158/0x480 fs/super.c:500 kill_block_super+0xa1/0x100 fs/super.c:1407 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7fa7579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ffa4afdc EFLAGS: 00000292 ORIG_RAX: 0000000000000034 RAX: 0000000000000000 RBX: 00000000ffa4b080 RCX: 000000000000000a RDX: 00000000f734e000 RSI: 0000000000000000 RDI: 00000000f72a2535 RBP: 00000000ffa4b080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:put_page_testzero include/linux/mm.h:996 [inline] RIP: 0010:folio_put_testzero include/linux/mm.h:1002 [inline] RIP: 0010:folio_put include/linux/mm.h:1429 [inline] RIP: 0010:__filemap_get_folio+0x8e2/0x990 mm/filemap.c:1937 Code: e8 b3 20 d3 ff 48 c7 c6 00 b2 56 8a 4c 89 e7 e8 d4 a6 0e 00 0f 0b e8 9d 20 d3 ff 48 c7 c6 00 b2 56 8a 4c 89 e7 e8 be a6 0e 00 <0f> 0b e8 87 20 d3 ff 4c 89 e7 49 c7 c4 f5 ff ff ff e8 f8 44 03 00 RSP: 0018:ffffc900038579a0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff888016a38000 RSI: ffffffff81b13d42 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8e7a71d7 R10: fffffbfff1cf4e3a R11: 0000000000000000 R12: ffffea00007e5b80 R13: ffff8880734a4480 R14: 0000000000000000 R15: ffffea00007e5bb4 FS: 0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000581dd380 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f737c0c4 CR3: 0000000071e9b000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- 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 bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
