bisecting fixing commit since 56e337f2cf1326323844927a04e9dbce9a244835
building syzkaller on 9e8eaa75a18a5cf8102e862be692c0781759e51b
testing commit 56e337f2cf1326323844927a04e9dbce9a244835
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 23fc90cd2dd07b6dafe185494b4c518b30a8e32635f0bb8bef7dad8f0f44e61f
all runs: crashed: WARNING in iomap_iter
testing current HEAD 979086f5e0066b4eff66e1eee123da228489985c
testing commit 979086f5e0066b4eff66e1eee123da228489985c
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 1604495783d06ae913993f47e00348980ec644a355d2ed4bc4a8a394a94bb41f
run #0: basic kernel testing failed: INFO: rcu detected stall in corrupted
run #1: crashed: WARNING in iomap_iter
run #2: crashed: WARNING in iomap_iter
run #3: crashed: WARNING in iomap_iter
run #4: crashed: WARNING in iomap_iter
run #5: crashed: WARNING in iomap_iter
run #6: crashed: WARNING in iomap_iter
run #7: crashed: WARNING in iomap_iter
run #8: crashed: WARNING in iomap_iter
run #9: crashed: WARNING in iomap_iter
revisions tested: 2, total time: 31m58.987648995s (build: 12m49.36702866s, test: 18m21.281822503s)
the crash still happens on HEAD
commit msg: Merge tag 'fs.fixes.v5.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
crash: WARNING in iomap_iter
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8 at fs/iomap/iter.c:33 iomap_iter_done fs/iomap/iter.c:35 [inline]
WARNING: CPU: 1 PID: 8 at fs/iomap/iter.c:33 iomap_iter+0xa08/0xee0 fs/iomap/iter.c:78
Modules linked in:
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.19.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: loop0 loop_rootcg_workfn
RIP: 0010:iomap_iter_done fs/iomap/iter.c:33 [inline]
RIP: 0010:iomap_iter+0xa08/0xee0 fs/iomap/iter.c:78
Code: 48 89 44 24 08 48 89 14 24 e8 a4 3a d5 ff 48 8b 44 24 08 48 8b 14 24 e9 cb fb ff ff 0f 0b e9 ac fa ff ff 0f 0b e9 0b fa ff ff <0f> 0b e9 d0 f9 ff ff 0f 0b e9 f1 f9 ff ff e8 85 d7 bd 06 85 c0 0f
RSP: 0018:ffffc900002ef6b0 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffffc900002ef848 RCX: 000000000000000c
RDX: 1ffff9200005df0a RSI: 1ffff9200005df10 RDI: ffffc900002ef878
RBP: ffffc900002ef880 R08: ffffc900002ef628 R09: ffff88814ab5c0c3
R10: ffffed102956b818 R11: 0000000000000006 R12: ffffc900002ef870
R13: ffffc900002ef8b8 R14: 00000fff80000000 R15: ffffffff80000000
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f70e3b5c130 CR3: 0000000025642000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __iomap_dio_rw+0x5d7/0x1740 fs/iomap/direct-io.c:600
 iomap_dio_rw+0x9/0x30 fs/iomap/direct-io.c:689
 ext4_dio_read_iter fs/ext4/file.c:79 [inline]
 ext4_file_read_iter+0x35f/0x4f0 fs/ext4/file.c:130
 call_read_iter include/linux/fs.h:2052 [inline]
 lo_rw_aio.isra.0+0x854/0xd80 drivers/block/loop.c:454
 do_req_filebacked drivers/block/loop.c:498 [inline]
 loop_handle_cmd drivers/block/loop.c:1859 [inline]
 loop_process_work+0x7f7/0x1b90 drivers/block/loop.c:1894
 process_one_work+0x865/0x13d0 kernel/workqueue.c:2289
 worker_thread+0x598/0xec0 kernel/workqueue.c:2436
 kthread+0x299/0x340 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
 </TASK>