Hello, syzbot found the following issue on: HEAD commit: f8dba31b0a82 Merge tag 'asym-keys-fix-for-linus-v6.4-rc5' .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=121b80dd280000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c980bfe8b399968 dashboard link: https://syzkaller.appspot.com/bug?extid=b23c4c9d3d228ba328d7 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1680f7d1280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12fad50d280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0aac0833aa9d/disk-f8dba31b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/06f1060b83c8/vmlinux-f8dba31b.xz kernel image: https://storage.googleapis.com/syzbot-assets/8450975febdf/bzImage-f8dba31b.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f17b197e6309/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b23c4c9d3d228ba328d7@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 737b3067 P4D 737b3067 PUD 737b2067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4991 Comm: syz-executor264 Not tainted 6.4.0-rc5-syzkaller-00002-gf8dba31b0a82 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90000007e58 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880b983d4c0 RCX: 611bc496b427aee7 RDX: 1ffff110059278c8 RSI: 0000000000000100 RDI: ffff888077a3ef00 RBP: 0000000000000001 R08: ffffffff816f1181 R09: ffffffff91529d1f R10: fffffbfff22a53a3 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888077a3ef00 R14: ffffc90000007ed8 R15: 0000000000000000 FS: 000055555682c3c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000737b9000 CR4: 0000000000350ef0 Call Trace: <IRQ> rcu_do_batch kernel/rcu/tree.c:2115 [inline] rcu_core+0x806/0x1ad0 kernel/rcu/tree.c:2377 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:memmove+0x43/0x1b0 arch/x86/lib/memmove_64.S:66 Code: 00 00 48 83 fa 20 0f 82 01 01 00 00 0f 1f 44 00 00 48 81 fa a8 02 00 00 72 05 40 38 fe 74 48 48 83 ea 20 48 83 ea 20 4c 8b 1e <4c> 8b 56 08 4c 8b 4e 10 4c 8b 46 18 48 8d 76 20 4c 89 1f 4c 89 57 RSP: 0018:ffffc90003afef90 EFLAGS: 00000282 RAX: ffff88807500e030 RBX: 0000000000000000 RCX: 0000000000000000 RDX: fffffffff9b0ee85 RSI: ffff88807b500040 RDI: ffff88807b4ff070 RBP: dffffc0000000000 R08: 0000000034365f36 R09: 38782f34365f3638 R10: 782f736c742f3436 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000fd0 R14: ffff88807500e0a8 R15: 0000000000000006 leaf_paste_in_buffer+0x270/0xc30 fs/reiserfs/lbalance.c:1017 balance_leaf_new_nodes_paste_whole fs/reiserfs/do_balan.c:1171 [inline] balance_leaf_new_nodes_paste fs/reiserfs/do_balan.c:1215 [inline] balance_leaf_new_nodes fs/reiserfs/do_balan.c:1246 [inline] balance_leaf+0x29c5/0xddc0 fs/reiserfs/do_balan.c:1450 do_balance+0x319/0x810 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x74b/0x8d0 fs/reiserfs/stree.c:2157 reiserfs_get_block+0x165c/0x4100 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x3bd/0x14b0 fs/buffer.c:2064 reiserfs_write_begin+0x36e/0xa60 fs/reiserfs/inode.c:2773 generic_cont_expand_simple+0x117/0x1f0 fs/buffer.c:2425 reiserfs_setattr+0x395/0x1370 fs/reiserfs/inode.c:3303 notify_change+0xb2c/0x1180 fs/attr.c:483 do_truncate+0x143/0x200 fs/open.c:66 do_sys_ftruncate+0x53a/0x770 fs/open.c:194 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f987e211279 Code: Unable to access opcode bytes at 0x7f987e21124f. RSP: 002b:00007ffc67526118 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007ffc67526158 RCX: 00007f987e211279 RDX: 00007f987e211279 RSI: 0000000002007fff RDI: 0000000000000004 RBP: 00007ffc67526150 R08: aaaaaaaaaaaa0102 R09: aaaaaaaaaaaa0102 R10: aaaaaaaaaaaa0102 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f987e2876dc R14: 0000000000000003 R15: 0000000000000001 </TASK> Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90000007e58 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880b983d4c0 RCX: 611bc496b427aee7 RDX: 1ffff110059278c8 RSI: 0000000000000100 RDI: ffff888077a3ef00 RBP: 0000000000000001 R08: ffffffff816f1181 R09: ffffffff91529d1f R10: fffffbfff22a53a3 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888077a3ef00 R14: ffffc90000007ed8 R15: 0000000000000000 FS: 000055555682c3c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000737b9000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 83 fa 20 cmp $0x20,%rdx 6: 0f 82 01 01 00 00 jb 0x10d c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 11: 48 81 fa a8 02 00 00 cmp $0x2a8,%rdx 18: 72 05 jb 0x1f 1a: 40 38 fe cmp %dil,%sil 1d: 74 48 je 0x67 1f: 48 83 ea 20 sub $0x20,%rdx 23: 48 83 ea 20 sub $0x20,%rdx 27: 4c 8b 1e mov (%rsi),%r11 * 2a: 4c 8b 56 08 mov 0x8(%rsi),%r10 <-- trapping instruction 2e: 4c 8b 4e 10 mov 0x10(%rsi),%r9 32: 4c 8b 46 18 mov 0x18(%rsi),%r8 36: 48 8d 76 20 lea 0x20(%rsi),%rsi 3a: 4c 89 1f mov %r11,(%rdi) 3d: 4c rex.WR 3e: 89 .byte 0x89 3f: 57 push %rdi --- 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 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 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
