loop4: writeback error on inode 8589934981, offset 4169728, sector 68719488024
gfs2: fsid=syz:syz.0: Error 10 writing to journal, jid=0
gfs2: fsid=syz:syz.0: fatal: I/O error(s)
gfs2: fsid=syz:syz.0: about to withdraw this file system
BUG: sleeping function called from invalid context at fs/gfs2/util.c:159
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6554, name: syz.4.146
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
6 locks held by syz.4.146/6554:
 #0: ffff88802bdad9c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1040
 #1: ffff88805f448418 (sb_writers#25){.+.+}-{0:0}, at: vfs_write+0x21e/0x9a0 fs/read_write.c:580
 #2: ffff88805d70d8b8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #2: ffff88805d70d8b8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: gfs2_file_write_iter+0x364/0xe90 fs/gfs2/file.c:1115
 #3: ffff88807f001060 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0x27/0x50 fs/gfs2/log.c:1179
 #4: ffff88807f000e88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #4: ffff88807f000e88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #4: ffff88807f000e88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x52/0x80 fs/gfs2/log.c:815
 #5: ffff88807f001248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: signal_our_withdraw fs/gfs2/util.c:152 [inline]
 #5: ffff88807f001248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: gfs2_withdraw+0x429/0x1400 fs/gfs2/util.c:333
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 6554 Comm: syz.4.146 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 __might_resched+0x48d/0x5f0 kernel/sched/core.c:10212
 signal_our_withdraw fs/gfs2/util.c:157 [inline]
 gfs2_withdraw+0x477/0x1400 fs/gfs2/util.c:333
 gfs2_ail1_empty+0x7d1/0x860 fs/gfs2/log.c:377
 gfs2_flush_revokes+0x5c/0x80 fs/gfs2/log.c:816
 revoke_lo_before_commit+0x2c/0x5f0 fs/gfs2/lops.c:867
 lops_before_commit fs/gfs2/lops.h:42 [inline]
 __gfs2_log_flush+0xbe7/0x24d0 fs/gfs2/log.c:1103
 gfs2_log_flush+0x34/0x50 fs/gfs2/log.c:1180
 gfs2_write_inode+0x1ec/0x370 fs/gfs2/super.c:457
 write_inode fs/fs-writeback.c:1534 [inline]
 __writeback_single_inode+0x720/0xee0 fs/fs-writeback.c:1751
 writeback_single_inode+0x21f/0x760 fs/fs-writeback.c:1807
 sync_inode_metadata+0xe0/0x140 fs/fs-writeback.c:2879
 gfs2_fsync+0x1ab/0x330 fs/gfs2/file.c:762
 generic_write_sync include/linux/fs.h:2669 [inline]
 gfs2_file_write_iter+0xb40/0xe90 fs/gfs2/file.c:1160
 call_write_iter include/linux/fs.h:2018 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x474/0x9a0 fs/read_write.c:584
 ksys_write+0x151/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7a9bd9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7a9cd2c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7a9c025fa0 RCX: 00007f7a9bd9e159
RDX: 00000000fffffceb RSI: 00002000000001c0 RDI: 0000000000000008
RBP: 00007f7a9be3503b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7a9c026038 R14: 00007f7a9c025fa0 R15: 00007fff82fa7778
 </TASK>
BUG: scheduling while atomic: syz.4.146/6554/0x00000002
6 locks held by syz.4.146/6554:
 #0: ffff88802bdad9c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1040
 #1: ffff88805f448418 (sb_writers#25){.+.+}-{0:0}, at: vfs_write+0x21e/0x9a0 fs/read_write.c:580
 #2: ffff88805d70d8b8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #2: ffff88805d70d8b8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: gfs2_file_write_iter+0x364/0xe90 fs/gfs2/file.c:1115
 #3: ffff88807f001060 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0x27/0x50 fs/gfs2/log.c:1179
 #4: ffff88807f000e88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #4: ffff88807f000e88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #4: ffff88807f000e88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x52/0x80 fs/gfs2/log.c:815
 #5: ffff88807f001248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: signal_our_withdraw fs/gfs2/util.c:152 [inline]
 #5: ffff88807f001248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: gfs2_withdraw+0x429/0x1400 fs/gfs2/util.c:333
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0