Hello, syzbot found the following issue on: HEAD commit: 610a9b8f49fb Linux 6.7-rc8 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=106d2699e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=48ca880a5d56f9b1 dashboard link: https://syzkaller.appspot.com/bug?extid=fd93e36ced1a43a58f75 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15f4cc41e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14d526ade80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b1acb98afcb0/disk-610a9b8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4f7d6503eb8c/vmlinux-610a9b8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/927f38e505d9/bzImage-610a9b8f.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/c4f427645c60/mount_0.gz The issue was bisected to: commit 13d257503c0930010ef9eed78b689cec417ab741 Author: Shreyansh Chouhan <chouhan.shreyansh630@xxxxxxxxx> Date: Fri Jul 9 15:29:29 2021 +0000 reiserfs: check directory items on read from disk bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1603b8f9e80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1503b8f9e80000 console output: https://syzkaller.appspot.com/x/log.txt?x=1103b8f9e80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fd93e36ced1a43a58f75@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 13d257503c09 ("reiserfs: check directory items on read from disk") general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 5048 Comm: sshd Not tainted 6.7.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:_compound_head include/linux/page-flags.h:247 [inline] RIP: 0010:free_swap_cache+0x25/0x3d0 mm/swap_state.c:287 Code: 0f 1f 44 00 00 66 0f 1f 00 41 54 55 53 48 89 fb e8 90 e9 b2 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 34 03 00 00 4c 8b 63 08 31 ff 4c 89 e5 83 e5 01 RSP: 0018:ffffc900034df938 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d3826a RDX: 0000000000000001 RSI: ffffffff81d37b70 RDI: 0000000000000008 RBP: 0000000000000005 R08: 0000000000000004 R09: 0000000000000200 R10: 0000000000000004 R11: 0000000000000001 R12: 0000000000000200 R13: dffffc0000000000 R14: ffff88807490d010 R15: ffff88807490d008 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc22cebe00 CR3: 000000007c973000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> free_pages_and_swap_cache+0x60/0xa0 mm/swap_state.c:315 tlb_batch_pages_flush+0x9a/0x190 mm/mmu_gather.c:98 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu mm/mmu_gather.c:300 [inline] tlb_finish_mmu+0x14b/0x6f0 mm/mmu_gather.c:392 exit_mmap+0x38b/0xa70 mm/mmap.c:3321 __mmput+0x12a/0x4d0 kernel/fork.c:1349 mmput+0x62/0x70 kernel/fork.c:1371 exit_mm kernel/exit.c:567 [inline] do_exit+0x9a5/0x2ad0 kernel/exit.c:856 do_group_exit+0xd4/0x2a0 kernel/exit.c:1018 get_signal+0x23b5/0x2790 kernel/signal.c:2904 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x5623b9f0af8e Code: Unable to access opcode bytes at 0x5623b9f0af64. RSP: 002b:00007fff3b36f178 EFLAGS: 00000246 ORIG_RAX: 000000000000010f RAX: 0000000000000000 RBX: 00000000000668a0 RCX: 00007f85b4f19ad5 RDX: 00007fff3b36f180 RSI: 00007fff3b36f2b0 RDI: 0000000000000011 RBP: 00005623bb920260 R08: 0000000000000008 R09: 0000000000000000 R10: 00007fff3b36f848 R11: 0000000000000246 R12: 00005623b9f8faa4 R13: 0000000000000001 R14: 00005623b9f903e8 R15: 00007fff3b36f7c8 </TASK> Modules linked in: ---------------- Code disassembly (best guess): 0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 5: 66 0f 1f 00 nopw (%rax) 9: 41 54 push %r12 b: 55 push %rbp c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 90 e9 b2 ff call 0xffb2e9a5 15: 48 8d 7b 08 lea 0x8(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 34 03 00 00 jne 0x368 34: 4c 8b 63 08 mov 0x8(%rbx),%r12 38: 31 ff xor %edi,%edi 3a: 4c 89 e5 mov %r12,%rbp 3d: 83 e5 01 and $0x1,%ebp --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
