Re: [moderation/CI] Re: fs: fix s_fs_info leak when setup_bdev_super() fails
Pimyn Girgis <[email protected]>
| Newsgroups | dev.linux.lists.syzbot |
|---|---|
| Message-ID | <CAJWNTGwE6uc0+JkQm2y6GZsxZpDt+=f01TVjHo8azqFOKdwDzA@mail.gmail.com> |
#syz upstream On Sat, Aug 22, 2026 at 10:48 AM syzbot ci <[email protected]> wrote: > > syzbot ci has tested the following series > > [v1] fs: fix s_fs_info leak when setup_bdev_super() fails > https://lore.kernel.org/all/[email protected] > * [PATCH] fs: fix s_fs_info leak when setup_bdev_super() fails > > and found the following issues: > * general protection fault in call_rcu > * general protection fault in erofs_kill_sb > * general protection fault in fuse_kill_sb_blk > * general protection fault in xfs_kill_sb > > Full report is available here: > https://ci.syzbot.org/series/1ef55243-f163-4d98-bbd1-41b579082704 > > *** > > general protection fault in call_rcu > > tree: torvalds > URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux > base: 26260251022fbc2f248a3d747a9b2b961b18d2d8 > arch: amd64 > compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 > config: https://ci.syzbot.org/builds/41c2a7e2-d41f-466f-8380-e05ef414bf62/config > syz repro: https://ci.syzbot.org/findings/f6ebcbaf-d8f4-4c25-9e68-98f46740729d/syz_repro > > /dev/sr0: Can't open blockdev > Oops: general protection fault, probably for non-canonical address 0xdffffc000000005a: 0000 [#1] SMP KASAN PTI > KASAN: null-ptr-deref in range [0x00000000000002d0-0x00000000000002d7] > CPU: 0 UID: 0 PID: 5792 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > RIP: 0010:__call_rcu_common kernel/rcu/tree.c:3157 [inline] > RIP: 0010:call_rcu+0xb9/0x8b0 kernel/rcu/tree.c:3279 > Code: 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 0e eb 8a 00 48 c7 03 c0 9a ac 81 e9 b3 05 00 00 48 8d 7b 08 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 eb ea 8a 00 4c 89 73 08 48 89 d8 48 c1 e8 > RSP: 0018:ffffc900041dfb08 EFLAGS: 00010206 > RAX: 000000000000005a RBX: 00000000000002c8 RCX: ffffffff9a9ab501 > RDX: 0000000000000001 RSI: ffffffff8e46456f RDI: 00000000000002d0 > RBP: 0000000000000000 R08: ffffffff90793d37 R09: 1ffffffff20f27a6 > R10: dffffc0000000000 R11: fffffbfff20f27a7 R12: dffffc0000000000 > R13: dffffc0000000000 R14: ffffffff82b4b6c0 R15: ffff88811e37e7a0 > FS: 00007f1ef40546c0(0000) GS:ffff88818d708000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f1ef4053ff8 CR3: 0000000173ace000 CR4: 00000000000006f0 > Call Trace: > <TASK> > deactivate_locked_super+0xbc/0x110 fs/super.c:603 > get_tree_bdev_flags+0x40e/0x560 fs/super.c:1895 > vfs_get_tree+0x92/0x2a0 fs/super.c:1958 > fc_mount fs/namespace.c:1198 [inline] > do_new_mount_fc fs/namespace.c:3772 [inline] > do_new_mount+0x319/0xdc0 fs/namespace.c:3848 > do_mount fs/namespace.c:4181 [inline] > __do_sys_mount fs/namespace.c:4397 [inline] > __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 > do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] > do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f1ef319e0d9 > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f1ef4054028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 00007f1ef3425fa0 RCX: 00007f1ef319e0d9 > RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000200000000000 > RBP: 00007f1ef3235024 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000214003 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007f1ef3426038 R14: 00007f1ef3425fa0 R15: 00007ffc4bde52a8 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:__call_rcu_common kernel/rcu/tree.c:3157 [inline] > RIP: 0010:call_rcu+0xb9/0x8b0 kernel/rcu/tree.c:3279 > Code: 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 0e eb 8a 00 48 c7 03 c0 9a ac 81 e9 b3 05 00 00 48 8d 7b 08 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 eb ea 8a 00 4c 89 73 08 48 89 d8 48 c1 e8 > RSP: 0018:ffffc900041dfb08 EFLAGS: 00010206 > RAX: 000000000000005a RBX: 00000000000002c8 RCX: ffffffff9a9ab501 > RDX: 0000000000000001 RSI: ffffffff8e46456f RDI: 00000000000002d0 > RBP: 0000000000000000 R08: ffffffff90793d37 R09: 1ffffffff20f27a6 > R10: dffffc0000000000 R11: fffffbfff20f27a7 R12: dffffc0000000000 > R13: dffffc0000000000 R14: ffffffff82b4b6c0 R15: ffff88811e37e7a0 > FS: 00007f1ef40546c0(0000) GS:ffff88818d708000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f1ef4053ff8 CR3: 0000000173ace000 CR4: 00000000000006f0 > ---------------- > Code disassembly (best guess): > 0: 48 c1 e8 03 shr $0x3,%rax > 4: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) > 9: 74 08 je 0x13 > b: 48 89 df mov %rbx,%rdi > e: e8 0e eb 8a 00 call 0x8aeb21 > 13: 48 c7 03 c0 9a ac 81 movq $0xffffffff81ac9ac0,(%rbx) > 1a: e9 b3 05 00 00 jmp 0x5d2 > 1f: 48 8d 7b 08 lea 0x8(%rbx),%rdi > 23: 48 89 f8 mov %rdi,%rax > 26: 48 c1 e8 03 shr $0x3,%rax > * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction > 2f: 74 05 je 0x36 > 31: e8 eb ea 8a 00 call 0x8aeb21 > 36: 4c 89 73 08 mov %r14,0x8(%rbx) > 3a: 48 89 d8 mov %rbx,%rax > 3d: 48 rex.W > 3e: c1 .byte 0xc1 > 3f: e8 .byte 0xe8 > > > *** > > general protection fault in erofs_kill_sb > > tree: torvalds > URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux > base: 26260251022fbc2f248a3d747a9b2b961b18d2d8 > arch: amd64 > compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 > config: https://ci.syzbot.org/builds/41c2a7e2-d41f-466f-8380-e05ef414bf62/config > syz repro: https://ci.syzbot.org/findings/a828baa5-9634-4255-a0b1-41e60df7067d/syz_repro > > Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI > KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] > CPU: 0 UID: 0 PID: 5846 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > RIP: 0010:erofs_kill_sb+0x53/0x270 fs/erofs/super.c:950 > Code: 00 00 48 89 d8 48 c1 e8 03 48 89 44 24 08 80 3c 28 00 74 08 48 89 df e8 bb 60 b8 fd 4c 8b 33 4d 8d 66 08 4d 89 e7 49 c1 ef 03 <41> 80 3c 2f 00 74 08 4c 89 e7 e8 9e 60 b8 fd 49 83 3c 24 00 4c 89 > RSP: 0018:ffffc90003dbfc08 EFLAGS: 00010202 > RAX: 1ffff1102edb18cf RBX: ffff888176d8c678 RCX: ffff88816bcabc00 > RDX: 0000000000000000 RSI: ffffffff8e46456f RDI: ffff888176d8c000 > RBP: dffffc0000000000 R08: ffffffff90793d37 R09: 1ffffffff20f27a6 > R10: dffffc0000000000 R11: ffffffff847e7250 R12: 0000000000000008 > R13: ffff888176d8c000 R14: 0000000000000000 R15: 0000000000000001 > FS: 00007efdff1c96c0(0000) GS:ffff88818d708000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007ff27edb9095 CR3: 0000000174554000 CR4: 00000000000006f0 > Call Trace: > <TASK> > deactivate_locked_super+0xbc/0x110 fs/super.c:603 > get_tree_bdev_flags+0x40e/0x560 fs/super.c:1895 > vfs_get_tree+0x92/0x2a0 fs/super.c:1958 > vfs_cmd_create+0xa2/0x200 fs/fsopen.c:231 > __do_sys_fsconfig fs/fsopen.c:463 [inline] > __se_sys_fsconfig+0x6b9/0x810 fs/fsopen.c:350 > do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] > do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7efdfe39e0d9 > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007efdff1c9028 EFLAGS: 00000246 ORIG_RAX: 00000000000001af > RAX: ffffffffffffffda RBX: 00007efdfe625fa0 RCX: 00007efdfe39e0d9 > RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004 > RBP: 00007efdfe435024 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007efdfe626038 R14: 00007efdfe625fa0 R15: 00007ffde183e908 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:erofs_kill_sb+0x53/0x270 fs/erofs/super.c:950 > Code: 00 00 48 89 d8 48 c1 e8 03 48 89 44 24 08 80 3c 28 00 74 08 48 89 df e8 bb 60 b8 fd 4c 8b 33 4d 8d 66 08 4d 89 e7 49 c1 ef 03 <41> 80 3c 2f 00 74 08 4c 89 e7 e8 9e 60 b8 fd 49 83 3c 24 00 4c 89 > RSP: 0018:ffffc90003dbfc08 EFLAGS: 00010202 > RAX: 1ffff1102edb18cf RBX: ffff888176d8c678 RCX: ffff88816bcabc00 > RDX: 0000000000000000 RSI: ffffffff8e46456f RDI: ffff888176d8c000 > RBP: dffffc0000000000 R08: ffffffff90793d37 R09: 1ffffffff20f27a6 > R10: dffffc0000000000 R11: ffffffff847e7250 R12: 0000000000000008 > R13: ffff888176d8c000 R14: 0000000000000000 R15: 0000000000000001 > FS: 00007efdff1c96c0(0000) GS:ffff88818d708000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007ff27edb9095 CR3: 0000000174554000 CR4: 00000000000006f0 > ---------------- > Code disassembly (best guess): > 0: 00 00 add %al,(%rax) > 2: 48 89 d8 mov %rbx,%rax > 5: 48 c1 e8 03 shr $0x3,%rax > 9: 48 89 44 24 08 mov %rax,0x8(%rsp) > e: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) > 12: 74 08 je 0x1c > 14: 48 89 df mov %rbx,%rdi > 17: e8 bb 60 b8 fd call 0xfdb860d7 > 1c: 4c 8b 33 mov (%rbx),%r14 > 1f: 4d 8d 66 08 lea 0x8(%r14),%r12 > 23: 4d 89 e7 mov %r12,%r15 > 26: 49 c1 ef 03 shr $0x3,%r15 > * 2a: 41 80 3c 2f 00 cmpb $0x0,(%r15,%rbp,1) <-- trapping instruction > 2f: 74 08 je 0x39 > 31: 4c 89 e7 mov %r12,%rdi > 34: e8 9e 60 b8 fd call 0xfdb860d7 > 39: 49 83 3c 24 00 cmpq $0x0,(%r12) > 3e: 4c rex.WR > 3f: 89 .byte 0x89 > > > *** > > general protection fault in fuse_kill_sb_blk > > tree: torvalds > URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux > base: 26260251022fbc2f248a3d747a9b2b961b18d2d8 > arch: amd64 > compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 > config: https://ci.syzbot.org/builds/41c2a7e2-d41f-466f-8380-e05ef414bf62/config > syz repro: https://ci.syzbot.org/findings/842bf23d-2982-4d44-81b0-f1e6e37301b2/syz_repro > > erofs (device loop0): mounted with root inode @ nid 36. > /dev/loop0: Can't open blockdev > Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI > KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] > CPU: 1 UID: 0 PID: 5856 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > RIP: 0010:fuse_mount_destroy fs/fuse/inode.c:1989 [inline] > RIP: 0010:fuse_kill_sb_blk+0x23c/0x290 fs/fuse/inode.c:2016 > Code: 00 00 00 00 00 fc ff df 4c 89 f7 e8 9e e2 f2 fe 42 80 3c 2b 00 74 08 48 89 ef e8 8f 92 de fe 48 8b 5d 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 75 92 de fe 48 8b 3b e8 3d 72 ff > RSP: 0018:ffffc9000234fb08 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88816c3cbc00 > RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff > RBP: ffff888174cb6678 R08: ffff888174cb6087 R09: 1ffff1102e996c10 > R10: dffffc0000000000 R11: ffffed102e996c11 R12: ffff888174cb6078 > R13: dffffc0000000000 R14: ffff888174cb6000 R15: 0000000000000000 > FS: 00007fb71cf006c0(0000) GS:ffff8882a8d08000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000200000001000 CR3: 00000001be98a000 CR4: 00000000000006f0 > Call Trace: > <TASK> > deactivate_locked_super+0xbc/0x110 fs/super.c:603 > get_tree_bdev_flags+0x40e/0x560 fs/super.c:1895 > fuse_get_tree+0x194/0x3b0 fs/fuse/inode.c:1877 > vfs_get_tree+0x92/0x2a0 fs/super.c:1958 > fc_mount fs/namespace.c:1198 [inline] > do_new_mount_fc fs/namespace.c:3772 [inline] > do_new_mount+0x319/0xdc0 fs/namespace.c:3848 > do_mount fs/namespace.c:4181 [inline] > __do_sys_mount fs/namespace.c:4397 [inline] > __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 > do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] > do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7fb71bf9e0d9 > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007fb71cf00028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 00007fb71c225fa0 RCX: 00007fb71bf9e0d9 > RDX: 0000200000000140 RSI: 00002000000002c0 RDI: 0000200000000240 > RBP: 00007fb71c035024 R08: 0000200000000400 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007fb71c226038 R14: 00007fb71c225fa0 R15: 00007ffe55b01cb8 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:fuse_mount_destroy fs/fuse/inode.c:1989 [inline] > RIP: 0010:fuse_kill_sb_blk+0x23c/0x290 fs/fuse/inode.c:2016 > Code: 00 00 00 00 00 fc ff df 4c 89 f7 e8 9e e2 f2 fe 42 80 3c 2b 00 74 08 48 89 ef e8 8f 92 de fe 48 8b 5d 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 75 92 de fe 48 8b 3b e8 3d 72 ff > RSP: 0018:ffffc9000234fb08 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88816c3cbc00 > RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff > RBP: ffff888174cb6678 R08: ffff888174cb6087 R09: 1ffff1102e996c10 > R10: dffffc0000000000 R11: ffffed102e996c11 R12: ffff888174cb6078 > R13: dffffc0000000000 R14: ffff888174cb6000 R15: 0000000000000000 > FS: 00007fb71cf006c0(0000) GS:ffff8882a8d08000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f9fb604de68 CR3: 00000001be98a000 CR4: 00000000000006f0 > ---------------- > Code disassembly (best guess), 7 bytes skipped: > 0: df 4c 89 f7 fisttps -0x9(%rcx,%rcx,4) > 4: e8 9e e2 f2 fe call 0xfef2e2a7 > 9: 42 80 3c 2b 00 cmpb $0x0,(%rbx,%r13,1) > e: 74 08 je 0x18 > 10: 48 89 ef mov %rbp,%rdi > 13: e8 8f 92 de fe call 0xfede92a7 > 18: 48 8b 5d 00 mov 0x0(%rbp),%rbx > 1c: 48 89 d8 mov %rbx,%rax > 1f: 48 c1 e8 03 shr $0x3,%rax > * 23: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction > 28: 74 08 je 0x32 > 2a: 48 89 df mov %rbx,%rdi > 2d: e8 75 92 de fe call 0xfede92a7 > 32: 48 8b 3b mov (%rbx),%rdi > 35: e8 .byte 0xe8 > 36: 3d .byte 0x3d > 37: 72 ff jb 0x38 > > > *** > > general protection fault in xfs_kill_sb > > tree: torvalds > URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux > base: 26260251022fbc2f248a3d747a9b2b961b18d2d8 > arch: amd64 > compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 > config: https://ci.syzbot.org/builds/41c2a7e2-d41f-466f-8380-e05ef414bf62/config > syz repro: https://ci.syzbot.org/findings/6086312c-12df-4d69-b442-5c8a99793535/syz_repro > > /dev/loop1: Can't open blockdev > Oops: general protection fault, probably for non-canonical address 0xdffffc0000000035: 0000 [#1] SMP KASAN PTI > KASAN: null-ptr-deref in range [0x00000000000001a8-0x00000000000001af] > CPU: 0 UID: 0 PID: 5903 Comm: syz.1.24 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > RIP: 0010:xfs_kill_sb+0x4e/0x260 fs/xfs/xfs_super.c:2335 > Code: 78 06 00 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 83 08 96 fe 4d 8b 36 4d 8d be a8 01 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 64 08 96 fe 4d 8b 27 4d 85 e4 0f 84 > RSP: 0018:ffffc900027afb50 EFLAGS: 00010206 > RAX: 0000000000000035 RBX: dffffc0000000000 RCX: ffff888110aa0000 > RDX: 0000000000000000 RSI: ffffffff8e46456f RDI: ffff888114d4e000 > RBP: ffffc900027afc00 R08: ffffffff90793d37 R09: 1ffffffff20f27a6 > R10: dffffc0000000000 R11: ffffffff83a0ca90 R12: dffffc0000000000 > R13: ffff888114d4e000 R14: 0000000000000000 R15: 00000000000001a8 > FS: 00007f104ac686c0(0000) GS:ffff88818d708000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000555f35035578 CR3: 00000001bf1d2000 CR4: 00000000000006f0 > Call Trace: > <TASK> > deactivate_locked_super+0xbc/0x110 fs/super.c:603 > get_tree_bdev_flags+0x40e/0x560 fs/super.c:1895 > vfs_get_tree+0x92/0x2a0 fs/super.c:1958 > fc_mount fs/namespace.c:1198 [inline] > do_new_mount_fc fs/namespace.c:3772 [inline] > do_new_mount+0x319/0xdc0 fs/namespace.c:3848 > do_mount fs/namespace.c:4181 [inline] > __do_sys_mount fs/namespace.c:4397 [inline] > __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 > do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] > do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f1049d9e0d9 > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f104ac68028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 00007f104a026090 RCX: 00007f1049d9e0d9 > RDX: 0000200000000000 RSI: 00002000000001c0 RDI: 0000200000000080 > RBP: 00007f1049e35024 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000001a0c099 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007f104a026128 R14: 00007f104a026090 R15: 00007ffd22a73788 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:xfs_kill_sb+0x4e/0x260 fs/xfs/xfs_super.c:2335 > Code: 78 06 00 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 83 08 96 fe 4d 8b 36 4d 8d be a8 01 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 64 08 96 fe 4d 8b 27 4d 85 e4 0f 84 > RSP: 0018:ffffc900027afb50 EFLAGS: 00010206 > > RAX: 0000000000000035 RBX: dffffc0000000000 RCX: ffff888110aa0000 > RDX: 0000000000000000 RSI: ffffffff8e46456f RDI: ffff888114d4e000 > RBP: ffffc900027afc00 R08: ffffffff90793d37 R09: 1ffffffff20f27a6 > R10: dffffc0000000000 R11: ffffffff83a0ca90 R12: dffffc0000000000 > R13: ffff888114d4e000 R14: 0000000000000000 R15: 00000000000001a8 > FS: 00007f104ac686c0(0000) GS:ffff88818d708000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f5295e4de68 CR3: 00000001bf1d2000 CR4: 00000000000006f0 > ---------------- > Code disassembly (best guess): > 0: 78 06 js 0x8 > 2: 00 00 add %al,(%rax) > 4: 4c 89 f0 mov %r14,%rax > 7: 48 c1 e8 03 shr $0x3,%rax > b: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) > f: 74 08 je 0x19 > 11: 4c 89 f7 mov %r14,%rdi > 14: e8 83 08 96 fe call 0xfe96089c > 19: 4d 8b 36 mov (%r14),%r14 > 1c: 4d 8d be a8 01 00 00 lea 0x1a8(%r14),%r15 > 23: 4c 89 f8 mov %r15,%rax > 26: 48 c1 e8 03 shr $0x3,%rax > * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction > 2e: 74 08 je 0x38 > 30: 4c 89 ff mov %r15,%rdi > 33: e8 64 08 96 fe call 0xfe96089c > 38: 4d 8b 27 mov (%r15),%r12 > 3b: 4d 85 e4 test %r12,%r12 > 3e: 0f .byte 0xf > 3f: 84 .byte 0x84 > > > *** > > If these findings have caused you to resend the series or submit a > separate fix, please add the following tag to your commit message: > Tested-by: [email protected] > > --- > This report is generated by a bot. It may contain errors. > syzbot ci engineers can be reached at [email protected]. > > To test a fix for this bug, please reply with `#syz test` > (on a separate line) and attach the patch to the email. > > Notes: > - The patch will be applied on top of the tested series (as an > incremental fix). > - To test a new version of the whole series, please send it directly > to [email protected]. > - Arguments like custom git repos and branches are not supported. > > The email will later be sent to: > [[email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected]] > > If the report looks fine to you, reply with: > #syz upstream > > If the report is a false positive, reply with > #syz invalid > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group. > To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. > To view this discussion visit https://groups.google.com/d/msgid/syzkaller-upstream-moderation/6a89625a.91706f20.16b6e3.02b2.GAE%40google.com. -- Ⲡⲟⲓⲙⲏⲛ Ⲅⲉⲱⲣⲅⲓⲟⲥ - Pimyn Girgis Software Engineer Kernel Dynamic Analysis [email protected]