WARNING: can't dereference registers at ADDR for ip retint_user

Status: auto-closed as invalid on 2021/03/16 07:08
Reported-by: syzbot+c5c936d9bbe009e6d6aa@syzkaller.appspotmail.com
First crash: 2073d, last: 2066d
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING: can't dereference registers at ADDR for ip retint_user (2) -1 122222 1707d 1911d 0/1 auto-closed as invalid on 2022/03/10 13:09

Sample crash report:
WARNING: can't dereference registers at 0000000000000401 for ip retint_user+0x8/0x18
sd 0:0:1:0: [sg0] tag#58 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
sd 0:0:1:0: [sg0] tag#58 CDB: opcode=0x70 (reserved)
sd 0:0:1:0: [sg0] tag#58 CDB[00]: 70 49 1d b8 fd 00 17 c6 30 e6 06 85 35 3e a7 8c
sd 0:0:1:0: [sg0] tag#58 CDB[10]: 55 56 44 3c 0e 06 70 44 05 2d 3a 7f 8a f9 58 dd
sd 0:0:1:0: [sg0] tag#58 CDB[20]: 6a
sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:0-fuseblk'
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9639 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 9639 Comm: syz-executor.0 Not tainted 4.14.212-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30
RSP: 0000:ffff8880585a77a0 EFLAGS: 00010282
RAX: 000000000000004a RBX: ffff8880ac0d8c90 RCX: 0000000000000000
RDX: 000000000001a7b8 RSI: ffffffff8145db00 RDI: ffffed100b0b4eea
RBP: ffff8880abf04740 R08: 000000000000004a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880af0478c0
R13: ffff8880b2d4f8c0 R14: ffff8880ac0d8c98 R15: ffff88809ae74bd8
 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:71 [inline]
 kobject_add_internal+0x28b/0x930 lib/kobject.c:229
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_add+0x11f/0x180 lib/kobject.c:409
 device_add+0x33f/0x15c0 drivers/base/core.c:1869
 device_create_groups_vargs+0x1dc/0x250 drivers/base/core.c:2513
 device_create_vargs+0x3a/0x50 drivers/base/core.c:2553
 bdi_register_va.part.0+0x35/0x650 mm/backing-dev.c:879
 bdi_register_va+0x63/0x80 mm/backing-dev.c:895
 super_setup_bdi_name+0x123/0x220 fs/super.c:1297
 fuse_bdi_init fs/fuse/inode.c:990 [inline]
 fuse_fill_super+0x937/0x15c0 fs/fuse/inode.c:1110
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0xe53/0x2a00 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45e159
RSP: 002b:00007fbef0862c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e159
RDX: 0000000020000100 RSI: 0000000020000200 RDI: 0000000020000180
RBP: 000000000119bfd0 R08: 00000000200004c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffda5900d9f R14: 00007fbef08639c0 R15: 000000000119bf8c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (5520):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/12/16 06:11 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 05:11 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 05:11 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 04:10 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 04:00 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 02:59 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 02:22 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 01:59 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 01:33 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 01:13 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 00:43 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/16 00:19 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 23:51 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 23:22 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 22:49 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 22:18 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 21:46 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 21:26 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 21:09 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 20:46 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 20:19 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 19:48 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 19:16 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 19:02 linux-4.14.y 3f2ecb86cb90 f213e07e .config console log report info ci2-linux-4-14
2020/12/15 18:28 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 17:25 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 16:26 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 15:40 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 14:41 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 13:53 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 13:00 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 11:59 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 11:11 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 10:31 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 09:54 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 09:01 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 08:37 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 08:01 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 07:07 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 06:29 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/15 06:04 linux-4.14.y 3f2ecb86cb90 97183ed7 .config console log report info ci2-linux-4-14
2020/12/09 20:24 linux-4.14.y 47cbf4cc32db c090b4da .config console log report info ci2-linux-4-14
* Struck through repros no longer work on HEAD.