Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in netfs_retry_reads ------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=2 set at [<ffffffff81670f76>] prepare_to_wait+0xa6/0x380 kernel/sched/wait.c:237 WARNING: CPU: 2 PID: 6504 at kernel/sched/core.c:8576 __might_sleep+0x117/0x170 kernel/sched/core.c:8576 Modules linked in: CPU: 2 UID: 0 PID: 6504 Comm: syz.0.19 Not tainted 6.12.0-rc6-syzkaller-gaf01434f267f #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:__might_sleep+0x117/0x170 kernel/sched/core.c:8576 Code: 49 8d bc 24 68 17 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 38 49 8b 94 24 68 17 00 00 48 c7 c7 40 49 6c 8b e8 ba 41 f2 ff 90 <0f> 0b 90 90 e9 70 ff ff ff e8 fb d9 92 00 e9 1e ff ff ff 89 34 24 RSP: 0018:ffffc90003a5eb48 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff8b83c8e0 RCX: ffffffff814e6e79 RDX: ffff888023afc880 RSI: ffffffff814e6e86 RDI: 0000000000000001 RBP: 0000000000000049 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888023afc880 R13: 0000000000000000 R14: 1ffff9200074bd83 R15: ffff88803ea60700 FS: 00007f803b8a96c0(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005635a9d4bc60 CR3: 0000000031d88000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> wait_on_bit include/linux/wait_bit.h:73 [inline] netfs_retry_reads+0xe4/0x1dc0 fs/netfs/read_retry.c:263 netfs_collect_read_results fs/netfs/read_collect.c:333 [inline] netfs_read_collection+0x2990/0x3bb0 fs/netfs/read_collect.c:414 netfs_wait_for_read+0x1e6/0x440 fs/netfs/read_collect.c:629 netfs_unbuffered_read fs/netfs/direct_read.c:156 [inline] netfs_unbuffered_read_iter_locked+0x1247/0x1860 fs/netfs/direct_read.c:231 netfs_unbuffered_read_iter+0xc5/0x100 fs/netfs/direct_read.c:266 v9fs_file_read_iter+0xbf/0x100 fs/9p/vfs_file.c:361 __kernel_read+0x3f1/0xb50 fs/read_write.c:527 integrity_kernel_read+0x7f/0xb0 security/integrity/iint.c:28 ima_calc_file_hash_tfm+0x2c9/0x3e0 security/integrity/ima/ima_crypto.c:480 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0x1ba/0x490 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x89f/0xa40 security/integrity/ima/ima_api.c:293 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372 ima_file_check+0xc1/0x110 security/integrity/ima/ima_main.c:572 security_file_post_open+0x8e/0x210 security/security.c:3129 do_open fs/namei.c:3776 [inline] path_openat+0x1419/0x2d60 fs/namei.c:3933 do_filp_open+0x1dc/0x430 fs/namei.c:3960 do_sys_openat2+0x17a/0x1e0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_open fs/open.c:1438 [inline] __se_sys_open fs/open.c:1434 [inline] __x64_sys_open+0x154/0x1e0 fs/open.c:1434 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f803ab7e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f803b8a9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f803ad35f80 RCX: 00007f803ab7e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140 RBP: 00007f803abf175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f803ad35f80 R15: 00007fff5dc85c38 </TASK> Tested on: commit: af01434f rxrpc: Fix missing locking causing hanging ca.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-writeback console output: https://syzkaller.appspot.com/x/log.txt?x=11796ac0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c0b2fb415081f288 dashboard link: https://syzkaller.appspot.com/bug?extid=885c03ad650731743489 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.
