ci starts bisection 2023-04-26 12:30:00.825922406 +0000 UTC m=+41732.087730061
bisecting fixing commit since 4fe89d07dcc2804c8b562f6c7896a45643d34b2f
building syzkaller on feb5635181eb12a6e3516172a3f5af06a3bc93e1
ensuring issue is reproducible on original commit 4fe89d07dcc2804c8b562f6c7896a45643d34b2f

testing commit 4fe89d07dcc2804c8b562f6c7896a45643d34b2f gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b305f60eb2d33f38d5c81047e6236733009e9e591e62d8369691d4fd42a62eea
run #0: crashed: general protection fault in blk_mq_free_rqs
run #1: crashed: general protection fault in blk_mq_free_rqs
run #2: crashed: WARNING in kernfs_remove_by_name_ns
run #3: crashed: WARNING in kernfs_remove_by_name_ns
run #4: crashed: WARNING in kernfs_remove_by_name_ns
run #5: crashed: WARNING in kernfs_remove_by_name_ns
run #6: crashed: general protection fault in blk_mq_free_rqs
run #7: crashed: WARNING in kernfs_remove_by_name_ns
run #8: crashed: general protection fault in blk_mq_free_rqs
run #9: crashed: general protection fault in blk_mq_free_rqs
run #10: crashed: WARNING in kernfs_remove_by_name_ns
run #11: crashed: WARNING in kernfs_remove_by_name_ns
run #12: crashed: general protection fault in blk_mq_free_rqs
run #13: crashed: WARNING in kernfs_remove_by_name_ns
run #14: crashed: WARNING in kernfs_remove_by_name_ns
run #15: crashed: WARNING in kernfs_remove_by_name_ns
run #16: crashed: WARNING in kernfs_remove_by_name_ns
run #17: crashed: WARNING in kernfs_remove_by_name_ns
run #18: crashed: WARNING in kernfs_remove_by_name_ns
run #19: crashed: general protection fault in blk_mq_free_rqs
testing current HEAD 0cfd8703e7da687924371e9bc77a025bdeba9637
testing commit 0cfd8703e7da687924371e9bc77a025bdeba9637 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b09b623a8975cd2f0e4dce911ee2a8880b01b10dc380ad915dd09da0b393bb07
all runs: crashed: WARNING in kernfs_remove_by_name_ns
revisions tested: 2, total time: 24m14.85497154s (build: 15m50.63003244s, test: 7m38.918999714s)
the crash still happens on HEAD
commit msg: Merge tag 'pm-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
crash: WARNING in kernfs_remove_by_name_ns
------------[ cut here ]------------
kernfs: can not remove 'nr_tags', no directory
WARNING: CPU: 0 PID: 5739 at fs/kernfs/dir.c:1649 kernfs_remove_by_name_ns+0xdf/0x120
Modules linked in:
CPU: 0 PID: 5739 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:kernfs_remove_by_name_ns+0xdf/0x120
Code: 47 8e d1 ff f0 ff 03 48 89 df e8 5c f2 ff ff 48 89 df e8 94 a5 ff ff 31 db eb 1d 48 c7 c7 c0 59 99 89 4c 89 e6 e8 e1 b8 58 ff <0f> 0b bb fe ff ff ff eb 0d bb fe ff ff ff 4c 89 f7 e8 2b f3 6d ff
RSP: 0018:ffffc90004fbf9c0 EFLAGS: 00010246
RAX: 27db0ea56e41ec00 RBX: ffffffff8bef6868 RCX: 0000000000000002
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffff520009f7eb5
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff89d7bde0
R13: ffffffff8bef68a0 R14: ffffffff89d7bd80 R15: 0000000000000000
FS:  00007f359b37d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f359a3ad0b0 CR3: 000000001e886000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sysfs_remove_group+0x13c/0x220
 sysfs_remove_groups+0x58/0x80
 __kobject_del+0x77/0x2c0
 kobject_del+0x3b/0x50
 blk_mq_sysfs_unregister_hctxs+0x134/0x2c0
 blk_mq_update_nr_hw_queues+0x532/0x1070
 nbd_start_device+0x129/0xab0
 nbd_ioctl+0x51c/0xc90
 blkdev_ioctl+0x5bd/0x6a0
 __se_sys_ioctl+0xa7/0xf0
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f359a28a5a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f359b37d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f359a3abf80 RCX: 00007f359a28a5a9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007
RBP: 00007f359b37d1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffb88900cf R14: 00007f359b37d300 R15: 0000000000022000
 </TASK>