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Tue, 18 Apr 2023 04:04:45 -0700 (PDT) Date: Tue, 18 Apr 2023 04:04:45 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000739c9f05f99a46d7@google.com> Subject: [syzbot] [fs?] [mm?] general protection fault in folio_wait_stable From: syzbot To: akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: B4853A0005 X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: 3p6krq396iifzf1xposc66nq3nj7zzqj X-HE-Tag: 1681815886-352326 X-HE-Meta: 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 J/d0Y/um 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 jj7ymGtp i6FalfdTWYwHHmXnMJpXVuay9Z7ptrLZpgMPCzK9wO3lcmseCD0GE7bTxHc5TRitGB3/jIy4aIm4IIc60r4kPO6rDR3Nb2yaXUTPvMz7S5JIxV4hUTZ/GRS0Dfm2fl+OYE7BwfHOUW0VKSF8jZgw8ojg6dlZ4ppXJKWf5Cbm7dEw0GLfwELC0dHuONy5CN8+SkfwSQ2oza5FVwiel+qjwGAGno6s7rfeWJ/tfZCGYj0pXMSMNFmnywi80mRI8GF4rRdJqDTw+NmEtJj4wwKsXuR7SGAQ6i2Zs94jAzmro2NAtGhDxhirrIW18sIkiGBd X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot found the following issue on: HEAD commit: 4aa1da8d9972 Add linux-next specific files for 20230417 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13b08dc0280000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e1a2e42c883f5b6 dashboard link: https://syzkaller.appspot.com/bug?extid=d1ae544e6e9dc29bcba5 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0beda3b66b40/disk-4aa1da8d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a7cd9f14ca57/vmlinux-4aa1da8d.xz kernel image: https://storage.googleapis.com/syzbot-assets/48453a9c6a60/bzImage-4aa1da8d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d1ae544e6e9dc29bcba5@syzkaller.appspotmail.com RSP: 002b:00007f963cd4d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f963c1abf80 RCX: 00007f963c08c169 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00007f963cd4d1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001dd03 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffd7ae18d4f R14: 00007f963cd4d300 R15: 0000000000022000 general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 18742 Comm: syz-executor.5 Not tainted 6.3.0-rc7-next-20230417-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 RIP: 0010:folio_inode include/linux/pagemap.h:400 [inline] RIP: 0010:folio_wait_stable+0x23/0xe0 mm/page-writeback.c:3132 Code: 00 00 00 0f 1f 40 00 f3 0f 1e fa 55 48 89 fd 53 e8 a2 92 d1 ff 48 8d 7d 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a4 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc9000316f488 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff88803e265cb0 RCX: ffffc9000c002000 RDX: 0000000000000001 RSI: ffffffff81b1f0ee RDI: 000000000000000c RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffffff8c8eef13 R10: fffffbfff191dde2 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88803e265ed8 R14: 0000000000002000 R15: ffff88803e265a50 FS: 00007f963cd4d700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f668b534110 CR3: 000000006ca4c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_da_write_begin+0x47f/0x8b0 fs/ext4/inode.c:2939 generic_perform_write+0x256/0x570 mm/filemap.c:3927 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:289 ext4_file_write_iter+0xbe0/0x1740 fs/ext4/file.c:710 call_write_iter include/linux/fs.h:1854 [inline] do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735 do_iter_write+0x185/0x7e0 fs/read_write.c:860 vfs_iter_write+0x74/0xa0 fs/read_write.c:901 iter_file_splice_write+0x745/0xc80 fs/splice.c:761 do_splice_from fs/splice.c:839 [inline] direct_splice_actor+0x114/0x180 fs/splice.c:1018 splice_direct_to_actor+0x335/0x8a0 fs/splice.c:973 do_splice_direct+0x1ab/0x280 fs/splice.c:1061 do_sendfile+0xb19/0x12c0 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1308 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: 0033:0x7f963c08c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f963cd4d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f963c1abf80 RCX: 00007f963c08c169 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00007f963cd4d1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001dd03 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffd7ae18d4f R14: 00007f963cd4d300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_inode include/linux/pagemap.h:400 [inline] RIP: 0010:folio_wait_stable+0x23/0xe0 mm/page-writeback.c:3132 Code: 00 00 00 0f 1f 40 00 f3 0f 1e fa 55 48 89 fd 53 e8 a2 92 d1 ff 48 8d 7d 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a4 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc9000316f488 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff88803e265cb0 RCX: ffffc9000c002000 RDX: 0000000000000001 RSI: ffffffff81b1f0ee RDI: 000000000000000c RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffffff8c8eef13 R10: fffffbfff191dde2 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88803e265ed8 R14: 0000000000002000 R15: ffff88803e265a50 FS: 00007f963cd4d700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32724000 CR3: 000000006ca4c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 0f 1f 40 00 nopl 0x0(%rax) 6: f3 0f 1e fa endbr64 a: 55 push %rbp b: 48 89 fd mov %rdi,%rbp e: 53 push %rbx f: e8 a2 92 d1 ff callq 0xffd192b6 14: 48 8d 7d 18 lea 0x18(%rbp),%rdi 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 89 fa mov %rdi,%rdx 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 0f 85 a4 00 00 00 jne 0xd7 33: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3a: fc ff df 3d: 48 rex.W 3e: 8b .byte 0x8b --- 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.