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Message-ID: <00000000000070b5f806186c5eb0@google.com> Date: Tue, 14 May 2024 09:19:40 -0700 From: syzbot <syzbot+2e3cb81b5d1fe18a374b@...kaller.appspotmail.com> To: davem@...emloft.net, herbert@...dor.apana.org.au, kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [crypto?] [bcachefs?] general protection fault in crypto_skcipher_encrypt Hello, syzbot found the following issue on: HEAD commit: 75fa778d74b7 Add linux-next specific files for 20240510 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=17c88d24980000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccdd3ebd6715749a dashboard link: https://syzkaller.appspot.com/bug?extid=2e3cb81b5d1fe18a374b 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=15d3705c980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=109afc20980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ad9391835bcf/disk-75fa778d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d827b3da9a26/vmlinux-75fa778d.xz kernel image: https://storage.googleapis.com/syzbot-assets/8f32f0182388/bzImage-75fa778d.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/94099facd0b3/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2e3cb81b5d1fe18a374b@...kaller.appspotmail.com loop0: detected capacity change from 0 to 32768 bcachefs (loop0): mounting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,nojournal_transaction_names bcachefs (loop0): recovering from clean shutdown, journal seq 10 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 1 PID: 5093 Comm: syz-executor398 Not tainted 6.9.0-rc7-next-20240510-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:crypto_skcipher_alg include/crypto/skcipher.h:375 [inline] RIP: 0010:crypto_skcipher_encrypt+0x45/0x130 crypto/skcipher.c:637 Code: 21 fd 49 8d 5e 40 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 69 2c 87 fd 48 8b 1b 48 8d 7b 18 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 4f 2c 87 fd 4c 8b 7b 18 48 83 c3 04 48 89 RSP: 0018:ffffc900024fdd98 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000008 RCX: ffff88802a9d1e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffffc900024fe330 R08: ffffc900024fde9f R09: 0000000000000000 R10: ffffc900024fde90 R11: fffff5200049fbd4 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffc900024fde60 R15: 1ffff9200049fbc4 FS: 000055557e03c380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000002c426000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> do_encrypt_sg fs/bcachefs/checksum.c:108 [inline] do_encrypt+0x66b/0x7d0 fs/bcachefs/checksum.c:150 gen_poly_key fs/bcachefs/checksum.c:191 [inline] bch2_checksum+0x1f8/0x730 fs/bcachefs/checksum.c:227 bch2_btree_node_read_done+0x1a3a/0x6770 fs/bcachefs/btree_io.c:1069 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1340 bch2_btree_node_read+0x2467/0x2a40 __bch2_btree_root_read fs/bcachefs/btree_io.c:1764 [inline] bch2_btree_root_read+0x61e/0x970 fs/bcachefs/btree_io.c:1788 read_btree_roots+0x22d/0x7b0 fs/bcachefs/recovery.c:472 bch2_fs_recovery+0x2346/0x3700 fs/bcachefs/recovery.c:800 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1031 bch2_fs_open+0xa8d/0xdf0 fs/bcachefs/super.c:2123 bch2_mount+0x71d/0x1320 fs/bcachefs/fs.c:1917 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f72c7b448ba Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffde59ed9d8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffde59ed9f0 RCX: 00007f72c7b448ba RDX: 0000000020011a00 RSI: 0000000020011a40 RDI: 00007ffde59ed9f0 RBP: 0000000000000004 R08: 00007ffde59eda30 R09: 00000000000119f1 R10: 0000000001200014 R11: 0000000000000282 R12: 0000000001200014 R13: 00007ffde59eda30 R14: 0000000000000003 R15: 0000000001000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:crypto_skcipher_alg include/crypto/skcipher.h:375 [inline] RIP: 0010:crypto_skcipher_encrypt+0x45/0x130 crypto/skcipher.c:637 Code: 21 fd 49 8d 5e 40 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 69 2c 87 fd 48 8b 1b 48 8d 7b 18 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 4f 2c 87 fd 4c 8b 7b 18 48 83 c3 04 48 89 RSP: 0018:ffffc900024fdd98 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000008 RCX: ffff88802a9d1e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffffc900024fe330 R08: ffffc900024fde9f R09: 0000000000000000 R10: ffffc900024fde90 R11: fffff5200049fbd4 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffc900024fde60 R15: 1ffff9200049fbc4 FS: 000055557e03c380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000002c426000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 21 fd and %edi,%ebp 2: 49 8d 5e 40 lea 0x40(%r14),%rbx 6: 48 89 d8 mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 69 2c 87 fd call 0xfd872c85 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 8d 7b 18 lea 0x18(%rbx),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 05 je 0x36 31: e8 4f 2c 87 fd call 0xfd872c85 36: 4c 8b 7b 18 mov 0x18(%rbx),%r15 3a: 48 83 c3 04 add $0x4,%rbx 3e: 48 rex.W 3f: 89 .byte 0x89 --- 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@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. 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 If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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