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mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E59221956095; Sat, 2 Nov 2024 00:06:00 +0000 (UTC) Received: from fedora (unknown [10.72.116.4]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4EF74195605A; Sat, 2 Nov 2024 00:05:52 +0000 (UTC) Date: Sat, 2 Nov 2024 08:05:47 +0800 From: Ming Lei To: syzbot Cc: axboe@kernel.dk, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, hch@lst.de, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net?] general protection fault in put_page (3) Message-ID: References: <67251378.050a0220.3c8d68.08cb.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <67251378.050a0220.3c8d68.08cb.GAE@google.com> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 On Fri, Nov 01, 2024 at 10:44:24AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: f9f24ca362a4 Add linux-next specific files for 20241031 > git tree: linux-next > console+strace: https://syzkaller.appspot.com/x/log.txt?x=131f2630580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=328572ed4d152be9 > dashboard link: https://syzkaller.appspot.com/bug?extid=71abe7ab2b70bca770fd > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1110d2a7980000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=153e5540580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/eb84549dd6b3/disk-f9f24ca3.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/beb29bdfa297/vmlinux-f9f24ca3.xz > kernel image: https://storage.googleapis.com/syzbot-assets/8881fe3245ad/bzImage-f9f24ca3.xz > > The issue was bisected to: > > commit e4e535bff2bc82bb49a633775f9834beeaa527db > Author: Ming Lei > Date: Thu Oct 24 05:00:15 2024 +0000 > > iov_iter: don't require contiguous pages in iov_iter_extract_bvec_pages > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1539b2a7980000 > console output: https://syzkaller.appspot.com/x/log.txt?x=1339b2a7980000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+71abe7ab2b70bca770fd@syzkaller.appspotmail.com > Fixes: e4e535bff2bc ("iov_iter: don't require contiguous pages in iov_iter_extract_bvec_pages") > > Oops: general protection fault, probably for non-canonical address 0xed2e87ee8f0cadc6: 0000 [#1] PREEMPT SMP KASAN PTI > KASAN: maybe wild-memory-access in range [0x69745f7478656e30-0x69745f7478656e37] > CPU: 1 UID: 0 PID: 5869 Comm: syz-executor171 Not tainted 6.12.0-rc5-next-20241031-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 > RIP: 0010:_compound_head include/linux/page-flags.h:242 [inline] > RIP: 0010:put_page+0x23/0x260 include/linux/mm.h:1552 > Code: 90 90 90 90 90 90 90 55 41 57 41 56 53 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 d8 ae 0d f8 49 8d 5e 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 5f e5 77 f8 48 8b 1b 48 89 de 48 83 > RSP: 0018:ffffc90003f970a8 EFLAGS: 00010207 > RAX: 0d2e8bee8f0cadc6 RBX: 69745f7478656e36 RCX: ffff8880306d3c00 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 69745f7478656e2e > RBP: dffffc0000000000 R08: ffffffff898706fd R09: 1ffffffff203a076 > R10: dffffc0000000000 R11: fffffbfff203a077 R12: 0000000000000000 > R13: ffff88807fd7a842 R14: 69745f7478656e2e R15: 69745f7478656e2e > FS: 0000555590726380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000045ad50 CR3: 0000000025350000 CR4: 00000000003526f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > skb_page_unref include/linux/skbuff_ref.h:43 [inline] > __skb_frag_unref include/linux/skbuff_ref.h:56 [inline] > skb_release_data+0x483/0x8a0 net/core/skbuff.c:1119 > skb_release_all net/core/skbuff.c:1190 [inline] > __kfree_skb net/core/skbuff.c:1204 [inline] > sk_skb_reason_drop+0x1c9/0x380 net/core/skbuff.c:1242 > kfree_skb_reason include/linux/skbuff.h:1262 [inline] > kfree_skb include/linux/skbuff.h:1271 [inline] > __ip_flush_pending_frames net/ipv4/ip_output.c:1538 [inline] > ip_flush_pending_frames+0x12d/0x260 net/ipv4/ip_output.c:1545 > udp_flush_pending_frames net/ipv4/udp.c:829 [inline] > udp_sendmsg+0x5d2/0x2a50 net/ipv4/udp.c:1302 > sock_sendmsg_nosec net/socket.c:729 [inline] > __sock_sendmsg+0x1a6/0x270 net/socket.c:744 > sock_sendmsg+0x134/0x200 net/socket.c:767 > splice_to_socket+0xa10/0x10b0 fs/splice.c:889 > do_splice_from fs/splice.c:941 [inline] > direct_splice_actor+0x11b/0x220 fs/splice.c:1164 > splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108 > do_splice_direct_actor fs/splice.c:1207 [inline] > do_splice_direct+0x289/0x3e0 fs/splice.c:1233 > do_sendfile+0x561/0xe10 fs/read_write.c:1388 > __do_sys_sendfile64 fs/read_write.c:1455 [inline] > __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1441 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f17eb533ab9 > Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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:00007ffdeb190c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f17eb533ab9 > RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004 > RBP: 00007f17eb5a65f0 R08: 0000000000000006 R09: 0000000000000006 > R10: 0000020000023893 R11: 0000000000000246 R12: 0000000000000001 > R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 > > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:_compound_head include/linux/page-flags.h:242 [inline] > RIP: 0010:put_page+0x23/0x260 include/linux/mm.h:1552 > Code: 90 90 90 90 90 90 90 55 41 57 41 56 53 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 d8 ae 0d f8 49 8d 5e 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 5f e5 77 f8 48 8b 1b 48 89 de 48 83 > RSP: 0018:ffffc90003f970a8 EFLAGS: 00010207 > RAX: 0d2e8bee8f0cadc6 RBX: 69745f7478656e36 RCX: ffff8880306d3c00 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 69745f7478656e2e > RBP: dffffc0000000000 R08: ffffffff898706fd R09: 1ffffffff203a076 > R10: dffffc0000000000 R11: fffffbfff203a077 R12: 0000000000000000 > R13: ffff88807fd7a842 R14: 69745f7478656e2e R15: 69745f7478656e2e > FS: 0000555590726380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000045ad50 CR3: 0000000025350000 CR4: 00000000003526f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > ---------------- > Code disassembly (best guess): > 0: 90 nop > 1: 90 nop > 2: 90 nop > 3: 90 nop > 4: 90 nop > 5: 90 nop > 6: 90 nop > 7: 55 push %rbp > 8: 41 57 push %r15 > a: 41 56 push %r14 > c: 53 push %rbx > d: 49 89 fe mov %rdi,%r14 > 10: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp > 17: fc ff df > 1a: e8 d8 ae 0d f8 call 0xf80daef7 > 1f: 49 8d 5e 08 lea 0x8(%r14),%rbx > 23: 48 89 d8 mov %rbx,%rax > 26: 48 c1 e8 03 shr $0x3,%rax > * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction > 2e: 74 08 je 0x38 > 30: 48 89 df mov %rbx,%rdi > 33: e8 5f e5 77 f8 call 0xf877e597 > 38: 48 8b 1b mov (%rbx),%rbx > 3b: 48 89 de mov %rbx,%rsi > 3e: 48 rex.W > 3f: 83 .byte 0x83 > > > --- > 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@googlegroups.com. > > 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 #syz test: https://github.com/ming1/linux.git for-next Thanks, Ming