Message-ID: <6735f465.050a0220.2a2fcc.0066.GAE@google.com>
Date: Thu, 14 Nov 2024 05:00:21 -0800
From: syzbot <syzbot+cb3fbcfb417448cfd278@...kaller.appspotmail.com>
To: kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] kernel BUG in bch2_bio_compress (2)

Hello,

syzbot found the following issue on:

HEAD commit:    de2f378f2b77 Merge tag 'nfsd-6.12-4' of git://git.kernel.o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16d05ea7980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=64aa0d9945bd5c1
dashboard link: https://syzkaller.appspot.com/bug?extid=cb3fbcfb417448cfd278
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=13f6e35f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12943e30580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-de2f378f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9ee61f45ffb8/vmlinux-de2f378f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a3b0e20d8f05/bzImage-de2f378f.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/113ef82b215b/mount_5.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cb3fbcfb417448cfd278@...kaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/bcachefs/compress.c:398!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5328 Comm: bch-rebalance/l Not tainted 6.12.0-rc6-syzkaller-00279-gde2f378f2b77 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__bio_compress fs/bcachefs/compress.c:398 [inline]
RIP: 0010:bch2_bio_compress+0x13a1/0x13e0 fs/bcachefs/compress.c:498
Code: e1 07 38 c1 0f 8c 77 fb ff ff be 14 00 00 00 4c 89 ef e8 e2 36 d7 fd e9 65 fb ff ff e8 88 6f 6d fd 90 0f 0b e8 80 6f 6d fd 90 <0f> 0b e8 78 6f 6d fd 90 0f 0b e8 c0 fb 9f 07 e8 6b 6f 6d fd 90 0f
RSP: 0018:ffffc9000d166c20 EFLAGS: 00010293
RAX: ffffffff84276ae0 RBX: ffff888044747b18 RCX: ffff88801f3e4880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: ffffc9000d166eb0 R08: ffffffff8427593f R09: 0000000000000078
R10: ffffc9000d1672c0 R11: fffff52001a2ce5d R12: 0000000000000000
R13: ffff88804b67b668 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005651105940d8 CR3: 000000000e734000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_write_extent fs/bcachefs/io_write.c:962 [inline]
 __bch2_write+0x151b/0x5dd0 fs/bcachefs/io_write.c:1458
 bch2_write+0x9b5/0x1760 fs/bcachefs/io_write.c:1631
 closure_queue include/linux/closure.h:270 [inline]
 closure_call include/linux/closure.h:432 [inline]
 bch2_data_update_read_done+0x22e/0x330 fs/bcachefs/data_update.c:426
 move_write fs/bcachefs/move.c:133 [inline]
 bch2_moving_ctxt_do_pending_writes+0x44c/0x8d0 fs/bcachefs/move.c:164
 bch2_moving_ctxt_flush_all+0x1c3/0x2f0 fs/bcachefs/move.c:179
 do_rebalance fs/bcachefs/rebalance.c:379 [inline]
 bch2_rebalance_thread+0x1a87/0x1fc0 fs/bcachefs/rebalance.c:401
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bio_compress fs/bcachefs/compress.c:398 [inline]
RIP: 0010:bch2_bio_compress+0x13a1/0x13e0 fs/bcachefs/compress.c:498
Code: e1 07 38 c1 0f 8c 77 fb ff ff be 14 00 00 00 4c 89 ef e8 e2 36 d7 fd e9 65 fb ff ff e8 88 6f 6d fd 90 0f 0b e8 80 6f 6d fd 90 <0f> 0b e8 78 6f 6d fd 90 0f 0b e8 c0 fb 9f 07 e8 6b 6f 6d fd 90 0f
RSP: 0018:ffffc9000d166c20 EFLAGS: 00010293
RAX: ffffffff84276ae0 RBX: ffff888044747b18 RCX: ffff88801f3e4880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: ffffc9000d166eb0 R08: ffffffff8427593f R09: 0000000000000078
R10: ffffc9000d1672c0 R11: fffff52001a2ce5d R12: 0000000000000000
R13: ffff88804b67b668 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fddecdff000 CR3: 0000000011e72000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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