syzbot


general protection fault in iter_file_splice_write

Status: upstream: reported C repro on 2024/05/20 08:06
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+d2125fcb6aa8c4276fd2@syzkaller.appspotmail.com
First crash: 64d, last: 2h34m
Discussions (3)
Title Replies (including bot) Last reply
[syzbot] Monthly fs report (Jul 2024) 0 (1) 2024/07/18 07:59
[PATCH] netfs: if extracting pages from user iterator fails return 0 1 (1) 2024/05/24 05:35
[syzbot] [fs?] general protection fault in iter_file_splice_write 8 (23) 2024/05/24 03:51
Last patch testing requests (14)
Created Duration User Patch Repo Result
2024/05/24 03:51 24m lizhi.xu@windriver.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/24 02:07 23m lizhi.xu@windriver.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/24 01:30 20m lizhi.xu@windriver.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/24 00:52 22m lizhi.xu@windriver.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/23 14:13 23m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/23 12:33 24m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/23 09:23 11m lizhi.xu@windriver.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb error
2024/05/23 08:33 23m lizhi.xu@windriver.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/22 14:05 23m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb error
2024/05/22 13:30 23m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/22 12:49 23m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/22 11:30 24m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log
2024/05/22 10:37 18m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb report log
2024/05/22 05:22 22m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 33e02dc69afb OK log

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 3 PID: 5196 Comm: syz-executor259 Not tainted 6.9.0-syzkaller-07370-g33e02dc69afb #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
RIP: 0010:iter_file_splice_write+0xa24/0x10b0 fs/splice.c:759
Code: 00 48 89 fa 48 c1 ea 03 80 3c 1a 00 0f 85 b1 04 00 00 4d 8b 65 10 49 c7 45 10 00 00 00 00 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 0f 85 1a 05 00 00 49 8b 54 24 08 4c 89 ee 4c 89 ff 83
RSP: 0018:ffffc900031b7930 EFLAGS: 00010202
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8209a1a8
RDX: 0000000000000001 RSI: ffffffff8209a06c RDI: 0000000000000008
RBP: 000000000000003d R08: 0000000000000006 R09: 0000000000000000
R10: 7fffffffffffefff R11: 0000000000000001 R12: 0000000000000000
R13: ffff888026d5a208 R14: 7fffffffffffefff R15: ffff88801e5c5800
FS:  00007f78cdfc16c0(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78ce0454d0 CR3: 0000000019dc8000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x19b/0x6d0 fs/splice.c:1164
 splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x17e/0x250 fs/splice.c:1233
 do_sendfile+0xaa8/0xdb0 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x1da/0x220 fs/read_write.c:1348
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78ce009d09
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f78cdfc1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f78ce091328 RCX: 00007f78ce009d09
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f78ce091320 R08: 00007f78cdfc16c0 R09: 0000000000000000
R10: 0000000100000000 R11: 0000000000000246 R12: 00007f78ce09132c
R13: 0000000000000006 R14: 00007ffe98369ff0 R15: 00007ffe9836a0d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
RIP: 0010:iter_file_splice_write+0xa24/0x10b0 fs/splice.c:759
Code: 00 48 89 fa 48 c1 ea 03 80 3c 1a 00 0f 85 b1 04 00 00 4d 8b 65 10 49 c7 45 10 00 00 00 00 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 0f 85 1a 05 00 00 49 8b 54 24 08 4c 89 ee 4c 89 ff 83
RSP: 0018:ffffc900031b7930 EFLAGS: 00010202
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8209a1a8
RDX: 0000000000000001 RSI: ffffffff8209a06c RDI: 0000000000000008
RBP: 000000000000003d R08: 0000000000000006 R09: 0000000000000000
R10: 7fffffffffffefff R11: 0000000000000001 R12: 0000000000000000
R13: ffff888026d5a208 R14: 7fffffffffffefff R15: ffff88801e5c5800
FS:  00007f78cdfc16c0(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78ce05d0d8 CR3: 0000000019dc8000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 48 89             	add    %cl,-0x77(%rax)
   3:	fa                   	cli
   4:	48 c1 ea 03          	shr    $0x3,%rdx
   8:	80 3c 1a 00          	cmpb   $0x0,(%rdx,%rbx,1)
   c:	0f 85 b1 04 00 00    	jne    0x4c3
  12:	4d 8b 65 10          	mov    0x10(%r13),%r12
  16:	49 c7 45 10 00 00 00 	movq   $0x0,0x10(%r13)
  1d:	00
  1e:	49 8d 7c 24 08       	lea    0x8(%r12),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 1a 00          	cmpb   $0x0,(%rdx,%rbx,1) <-- trapping instruction
  2e:	0f 85 1a 05 00 00    	jne    0x54e
  34:	49 8b 54 24 08       	mov    0x8(%r12),%rdx
  39:	4c 89 ee             	mov    %r13,%rsi
  3c:	4c 89 ff             	mov    %r15,%rdi
  3f:	83                   	.byte 0x83

Crashes (644):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/16 08:21 upstream 33e02dc69afb ef5d53ed .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in iter_file_splice_write
2024/07/19 15:12 upstream 720261cfc732 ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/19 07:45 upstream 68b59730459e ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/19 07:38 upstream 68b59730459e ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/19 01:31 upstream 68b59730459e ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/18 12:32 upstream b1bc554e009e 7403ec00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/18 06:21 upstream b1bc554e009e 03114f55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in iter_file_splice_write
2024/07/18 03:23 upstream 51835949dda3 03114f55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/17 15:44 upstream 51835949dda3 03114f55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in iter_file_splice_write
2024/07/17 13:55 upstream 51835949dda3 099fe5ad .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/16 21:06 upstream 408323581b72 215bec2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in iter_file_splice_write
2024/07/16 10:00 upstream d67978318827 b66b37bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in iter_file_splice_write
2024/07/16 08:46 upstream d67978318827 b66b37bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/15 19:19 upstream 5e0497553643 efee4ed2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/15 15:08 upstream 0c3836482481 efee4ed2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in iter_file_splice_write
2024/07/14 23:50 upstream 4d145e3f830b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/14 16:08 upstream 4d145e3f830b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in iter_file_splice_write
2024/07/14 12:24 upstream 4d145e3f830b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/14 04:32 upstream d0d0cd380055 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/13 13:45 upstream 528dd46d0fc3 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in iter_file_splice_write
2024/07/13 07:06 upstream 528dd46d0fc3 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/13 06:55 upstream 528dd46d0fc3 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in iter_file_splice_write
2024/07/10 22:54 upstream a19ea421490d c699c2eb .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in iter_file_splice_write
2024/07/19 16:20 upstream 720261cfc732 890ce4f3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/19 10:05 upstream 720261cfc732 ee4e11c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/19 09:56 upstream 720261cfc732 ee4e11c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/19 04:08 upstream 720261cfc732 ee4e11c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 19:46 upstream f2f6a8e88717 f3eecf69 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 18:44 upstream f2f6a8e88717 f3eecf69 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 16:47 upstream b1bc554e009e f3eecf69 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 15:46 upstream b1bc554e009e f3eecf69 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 14:41 upstream b1bc554e009e 0f902625 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 14:30 upstream b1bc554e009e 0f902625 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 05:12 upstream b1bc554e009e 0f902625 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/18 01:33 upstream 8b0f0bb27c32 877a6ab1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/17 22:42 upstream 8b0f0bb27c32 877a6ab1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/17 21:09 upstream 8b0f0bb27c32 877a6ab1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/17 04:34 upstream 51835949dda3 215bec2d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/16 12:23 upstream 1467b49869df b66b37bd .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/16 02:54 upstream 1467b49869df b66b37bd .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/15 06:13 upstream 0c3836482481 252f67bd .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/13 20:55 upstream d0d0cd380055 eaeb5c15 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in iter_file_splice_write
2024/07/19 05:48 linux-next 41c196e567fb ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/18 11:07 linux-next 73399b58e5e5 7403ec00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/18 09:50 linux-next 73399b58e5e5 7403ec00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/18 08:01 linux-next 73399b58e5e5 03114f55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/16 18:15 linux-next 4f40be61af99 215bec2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/16 11:19 linux-next 4f40be61af99 b66b37bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/16 06:53 linux-next 3fe121b62282 b66b37bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/15 05:58 linux-next 3fe121b62282 c605e6a2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
2024/07/14 08:46 linux-next 3fe121b62282 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in iter_file_splice_write
* Struck through repros no longer work on HEAD.