WARNING in __set_page_dirty

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 7878a41b6cc1 Linux 4.14.307
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15ab9d50c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=77c994a24403ce1c
dashboard link: https://syzkaller.appspot.com/bug?extid=e2aa8be6fa4bdbacfcd5
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1fdebf709d79/disk-7878a41b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/88229e373f4d/vmlinux-7878a41b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bf3c4c287a8b/bzImage-7878a41b.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2aa8b...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 11850 at fs/buffer.c:633 __set_page_dirty+0x1fa/0x2a0 fs/buffer.c:633
Kernel panic - not syncing: kernel: panic_on_warn set ...

CPU: 0 PID: 11850 Comm: syz-executor.3 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
panic+0x21d/0x451 kernel/panic.c:247
check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171
__warn+0xdf/0x1e0 kernel/panic.c:603
report_bug+0x208/0x250 lib/bug.c:183
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:967
RIP: 0010:__set_page_dirty+0x1fa/0x2a0 fs/buffer.c:633
RSP: 0018:ffff88804709fac0 EFLAGS: 00010097
RAX: ffff8880aaaf4640 RBX: ffff8880537a6580 RCX: 00000000000072e7
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffea00013a2f88
RBP: ffffea00013a2f80 R08: ffffffff8b9df2b8 R09: 00000000000c023b
R10: ffff8880aaaf4f68 R11: ffff8880aaaf4640 R12: 0000000000000282
R13: ffffea00013a2f80 R14: ffff8880537a6598 R15: ffffea00013a2fa0
__set_page_dirty_buffers+0x15c/0x240 fs/buffer.c:693
set_page_dirty+0x148/0x2a0 mm/page-writeback.c:2586
block_page_mkwrite+0x1fa/0x2b0 fs/buffer.c:2557
ext4_page_mkwrite+0x7c0/0xf70 fs/ext4/inode.c:6235
do_page_mkwrite+0xd4/0x2e0 mm/memory.c:2492
wp_page_shared mm/memory.c:2796 [inline]
do_wp_page+0x7e2/0x1db0 mm/memory.c:2896
handle_pte_fault mm/memory.c:4131 [inline]
__handle_mm_fault+0x234f/0x4620 mm/memory.c:4239
handle_mm_fault+0x455/0x9c0 mm/memory.c:4276
__do_page_fault+0x549/0xad0 arch/x86/mm/fault.c:1442
page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1126
RIP: ffb1e78:0x7f2a1055c530
RSP: 0000:00007ffd1d7ce5d8 EFLAGS: 7f2a1055c53c
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 7878a41b6cc1 Linux 4.14.307
git tree: linux-4.14.y

console output: https://syzkaller.appspot.com/x/log.txt?x=12d96874c80000

kernel config: https://syzkaller.appspot.com/x/.config?x=77c994a24403ce1c
dashboard link: https://syzkaller.appspot.com/bug?extid=e2aa8be6fa4bdbacfcd5
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=175fa4b0c80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11aa2822c80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1fdebf709d79/disk-7878a41b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/88229e373f4d/vmlinux-7878a41b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bf3c4c287a8b/bzImage-7878a41b.xz

mounted in repro #1: https://storage.googleapis.com/syzbot-assets/5ce621c5d41f/mount_0.gz
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/9eddf781b731/mount_13.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2aa8b...@syzkaller.appspotmail.com

EXT4-fs (loop3): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 2 with error 28
EXT4-fs (loop5): dirty_blocks=352
EXT4-fs (loop3): This should not happen!! Data will be lost
EXT4-fs (loop5): Block reservation details
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8222 at fs/buffer.c:633 __set_page_dirty+0x1fa/0x2a0 fs/buffer.c:633
EXT4-fs (loop5): i_reserved_data_blocks=22

Kernel panic - not syncing: kernel: panic_on_warn set ...

CPU: 0 PID: 8222 Comm: syz-executor218 Not tainted 4.14.307-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
panic+0x21d/0x451 kernel/panic.c:247
check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171
__warn+0xdf/0x1e0 kernel/panic.c:603
report_bug+0x208/0x250 lib/bug.c:183
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:967
RIP: 0010:__set_page_dirty+0x1fa/0x2a0 fs/buffer.c:633

RSP: 0018:ffff8880aafefb60 EFLAGS: 00010097
RAX: ffff8880abb26180 RBX: ffff88808dffe5c0 RCX: 0000000000007a19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffea0002241288
RBP: ffffea0002241280 R08: ffffffff8b9e2c48 R09: 00000000000c023c
R10: ffff8880abb26aa8 R11: ffff8880abb26180 R12: 0000000000000282
R13: ffffea0002241280 R14: ffff88808dffe5d8 R15: ffffea00022412a0

__set_page_dirty_buffers+0x15c/0x240 fs/buffer.c:693
set_page_dirty+0x148/0x2a0 mm/page-writeback.c:2586
block_page_mkwrite+0x1fa/0x2b0 fs/buffer.c:2557
ext4_page_mkwrite+0x7c0/0xf70 fs/ext4/inode.c:6235
do_page_mkwrite+0xd4/0x2e0 mm/memory.c:2492

do_shared_fault mm/memory.c:3824 [inline]
do_fault mm/memory.c:3889 [inline]
handle_pte_fault mm/memory.c:4115 [inline]
__handle_mm_fault+0x23e8/0x4620 mm/memory.c:4239

handle_mm_fault+0x455/0x9c0 mm/memory.c:4276
__do_page_fault+0x549/0xad0 arch/x86/mm/fault.c:1442
page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1126

RIP: 69662f2e:0xf6f2cbf92df09e20
RSP: 1acdf810:00007fca1acac858 EFLAGS: 7fca1acac0e0