syzbot has found a reproducer for the following issue on: HEAD commit: d635f6cc934b Merge tag 'drm-fixes-2023-05-20' of git://ano.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=177b7d29280000 kernel config: https://syzkaller.appspot.com/x/.config?x=bda401fa9c6b4502 dashboard link: https://syzkaller.appspot.com/bug?extid=d015b6c2fbb5c383bf08 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=157567a6280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d301f9280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8dcff8d58d55/disk-d635f6cc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b0fda3221672/vmlinux-d635f6cc.xz kernel image: https://storage.googleapis.com/syzbot-assets/9541aa11c888/bzImage-d635f6cc.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/7626bc33593c/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d015b6c2fbb5c383bf08@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc0000000009: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000048-0x000000000000004f] CPU: 1 PID: 5010 Comm: syz-executor252 Not tainted 6.4.0-rc2-syzkaller-00290-gd635f6cc934b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:__lock_acquire+0x69/0x2000 kernel/locking/lockdep.c:4942 Code: df 0f b6 04 30 84 c0 0f 85 5a 16 00 00 83 3d d1 e1 ea 0c 00 0f 84 02 11 00 00 83 3d 70 33 74 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 f7 e8 59 38 78 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc90003a6faf8 EFLAGS: 00010006 RAX: 0000000000000009 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000048 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000048 R15: ffff88807d47d940 FS: 00007fcf413a3700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055664a01b058 CR3: 000000007ddb9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 __raw_write_lock include/linux/rwlock_api_smp.h:209 [inline] _raw_write_lock+0x2e/0x40 kernel/locking/spinlock.c:300 __drop_extent_tree+0x3ac/0x660 fs/f2fs/extent_cache.c:1100 f2fs_drop_extent_tree+0x17/0x30 fs/f2fs/extent_cache.c:1116 f2fs_insert_range+0x2d5/0x3c0 fs/f2fs/file.c:1664 f2fs_fallocate+0x4e4/0x6d0 fs/f2fs/file.c:1838 vfs_fallocate+0x54b/0x6b0 fs/open.c:324 ksys_fallocate fs/open.c:347 [inline] __do_sys_fallocate fs/open.c:355 [inline] __se_sys_fallocate fs/open.c:353 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:353 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcf413f7459 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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:00007fcf413a32f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fcf414817a0 RCX: 00007fcf413f7459 RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000005 RBP: 00007fcf4144e7f8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010000 R11: 0000000000000246 R12: 00007fcf4144e6c0 R13: 0030656c69662f2e R14: 4b55cd3db08b6c4e R15: 00007fcf414817a8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x69/0x2000 kernel/locking/lockdep.c:4942 Code: df 0f b6 04 30 84 c0 0f 85 5a 16 00 00 83 3d d1 e1 ea 0c 00 0f 84 02 11 00 00 83 3d 70 33 74 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 f7 e8 59 38 78 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc90003a6faf8 EFLAGS: 00010006 RAX: 0000000000000009 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000048 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000048 R15: ffff88807d47d940 FS: 00007fcf413a3700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055664a01b058 CR3: 000000007ddb9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: df 0f fisttps (%rdi) 2: b6 04 mov $0x4,%dh 4: 30 84 c0 0f 85 5a 16 xor %al,0x165a850f(%rax,%rax,8) b: 00 00 add %al,(%rax) d: 83 3d d1 e1 ea 0c 00 cmpl $0x0,0xceae1d1(%rip) # 0xceae1e5 14: 0f 84 02 11 00 00 je 0x111c 1a: 83 3d 70 33 74 0b 00 cmpl $0x0,0xb743370(%rip) # 0xb743391 21: 74 2b je 0x4e 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 f7 mov %r14,%rdi 33: e8 59 38 78 00 callq 0x783891 38: 48 rex.W 39: be 00 00 00 00 mov $0x0,%esi 3e: 00 fc add %bh,%ah --- 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.
