linux-kernel - [syzbot] [bcachefs?] kernel panic: not locked: inodes NUM:NUM:NUM cached

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Message-ID: <000000000000dd79ba0619376337@google.com>
Date: Fri, 24 May 2024 11:32:29 -0700
From: syzbot <syzbot+b01867e789ff58727a77@...kaller.appspotmail.com>
To: bfoster@...hat.com, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] kernel panic: not locked: inodes NUM:NUM:NUM cached

Hello,

syzbot found the following issue on:

HEAD commit:    fda5695d692c Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=145455cc980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=95dc1de8407c7270
dashboard link: https://syzkaller.appspot.com/bug?extid=b01867e789ff58727a77
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15bba634980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17d2a5cc980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/07f3214ff0d9/disk-fda5695d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/70e2e2c864e8/vmlinux-fda5695d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b259942a16dc/Image-fda5695d.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/a396b8da95e5/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b01867e789ff58727a77@...kaller.appspotmail.com

path: idx  2 ref 1:0 P S btree=dirents l=0 pos 4096:6783475523080972787:U32_MAX locks 0 bch2_trans_iter_init fs/bcachefs/btree_iter.h:489 [inline]
path: idx  2 ref 1:0 P S btree=dirents l=0 pos 4096:6783475523080972787:U32_MAX locks 0 bch2_hash_lookup_in_snapshot+0x150/0x564 fs/bcachefs/str_hash.h:173
path: idx  1 ref 0:0 P S btree=subvolumes l=0 pos 0:1:0 locks 0 bch2_trans_iter_init fs/bcachefs/btree_iter.h:489 [inline]
path: idx  1 ref 0:0 P S btree=subvolumes l=0 pos 0:1:0 locks 0 __bch2_bkey_get_iter+0xe4/0x248 fs/bcachefs/btree_iter.h:548
transaction updates for bch2_lookup journal seq 0
Kernel panic - not syncing: not locked: inodes 0:4101:0 cached
CPU: 1 PID: 6245 Comm: syz-executor964 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 dump_stack+0x1c/0x28 lib/dump_stack.c:123
 panic+0x30c/0x894 kernel/panic.c:348
 bch2_assert_pos_locked+0x890/0x8dc fs/bcachefs/btree_iter.c:367
 bch2_inode_update_after_write+0x184/0x88c fs/bcachefs/fs.c:59
 bch2_vfs_inode_init+0xac/0x640 fs/bcachefs/fs.c:1448
 bch2_lookup_trans fs/bcachefs/fs.c:419 [inline]
 bch2_lookup+0x918/0xbcc fs/bcachefs/fs.c:437
 lookup_open fs/namei.c:3475 [inline]
 open_last_lookups fs/namei.c:3566 [inline]
 path_openat+0xc90/0x2830 fs/namei.c:3796
 do_filp_open+0x1bc/0x3cc fs/namei.c:3826
 do_sys_openat2+0x124/0x1b8 fs/open.c:1406
 do_sys_open fs/open.c:1421 [inline]
 __do_sys_openat fs/open.c:1437 [inline]
 __se_sys_openat fs/open.c:1432 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1432
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
SMP: stopping secondary CPUs
Kernel Offset: disabled
CPU features: 0x00,00000103,80100128,42017203
Memory Limit: none
Rebooting in 86400 seconds..

---
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