syzbot

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:306
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 6396, name: modprobe
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
2 locks held by modprobe/6396:
 #0: ffff88801e210400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:785 [inline]
 #0: ffff88801e210400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: lookup_slow fs/namei.c:1706 [inline]
 #0: ffff88801e210400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1998
 #1: ffffffff8c7991c0 (rcu_read_lock){....}-{1:2}, at: lru_gen_refault mm/workingset.c:293 [inline]
 #1: ffffffff8c7991c0 (rcu_read_lock){....}-{1:2}, at: workingset_refault+0x175/0x11e0 mm/workingset.c:528
CPU: 1 PID: 6396 Comm: modprobe Not tainted 6.4.0-rc1-next-20230512-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106
 __might_resched+0x358/0x580 kernel/sched/core.c:10148
 might_alloc include/linux/sched/mm.h:306 [inline]
 slab_pre_alloc_hook mm/slab.h:670 [inline]
 slab_alloc_node mm/slub.c:3433 [inline]
 slab_alloc mm/slub.c:3459 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3466 [inline]
 kmem_cache_alloc+0x357/0x3b0 mm/slub.c:3475
 kmem_cache_zalloc include/linux/slab.h:670 [inline]
 alloc_buffer_head+0x24/0x150 fs/buffer.c:3044
 folio_alloc_buffers+0x2f2/0x810 fs/buffer.c:941
 alloc_page_buffers fs/buffer.c:976 [inline]
 grow_dev_page fs/buffer.c:1084 [inline]
 grow_buffers fs/buffer.c:1130 [inline]
 __getblk_slow+0x612/0x1230 fs/buffer.c:1157
 __getblk_gfp+0x72/0x80 fs/buffer.c:1452
 sb_getblk include/linux/buffer_head.h:369 [inline]
 __ext4_get_inode_loc+0x4ab/0x1330 fs/ext4/inode.c:4376
 __ext4_get_inode_loc_noinmem+0xb9/0x160 fs/ext4/inode.c:4489
 __ext4_iget+0x426/0x4430 fs/ext4/inode.c:4686
 ext4_lookup fs/ext4/namei.c:1851 [inline]
 ext4_lookup+0x387/0x700 fs/ext4/namei.c:1826
 __lookup_slow+0x24c/0x460 fs/namei.c:1690
 lookup_slow fs/namei.c:1707 [inline]
 walk_component+0x33f/0x5a0 fs/namei.c:1998
 link_path_walk.part.0+0x74e/0xd60 fs/namei.c:2325
 link_path_walk fs/namei.c:2250 [inline]
 path_openat+0x25c/0x2750 fs/namei.c:3787
 do_filp_open+0x1ba/0x410 fs/namei.c:3818
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1356
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2737aada46
Code: 10 00 00 00 44 8b 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 0a 48 01 00 48 83 c8 ff c3 31
RSP: 002b:00007ffff7f33bb8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffff7f33e18 RCX: 00007f2737aada46
RDX: 0000000000080000 RSI: 00007ffff7f33c30 RDI: 00000000ffffff9c
RBP: 00007ffff7f33c20 R08: 0000000000080000 R09: 00007ffff7f33c30
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffff7f33c30
R13: 0000000000000000 R14: 00007ffff7f33dff R15: 00000000ffffffff
 </TASK>
------------[ cut here ]------------
Voluntary context switch within RCU read-side critical section!
WARNING: CPU: 0 PID: 6396 at kernel/rcu/tree_plugin.h:320 rcu_note_context_switch+0xbb9/0x1800 kernel/rcu/tree_plugin.h:320
Modules linked in:
CPU: 0 PID: 6396 Comm: modprobe Tainted: G        W          6.4.0-rc1-next-20230512-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:rcu_note_context_switch+0xbb9/0x1800 kernel/rcu/tree_plugin.h:320
Code: fd 04 68 00 4c 8b 4c 24 30 8b 4c 24 28 48 8b 54 24 20 e9 8f 03 00 00 48 c7 c7 c0 2a 4e 8a c6 05 73 2b f6 0c 01 e8 17 b5 dc ff <0f> 0b e9 4c f5 ff ff 81 e5 ff ff ff 7f 0f 84 d7 f6 ff ff 65 48 8b
RSP: 0018:ffffc9000327f008 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffff8880b983d4c0 RCX: 0000000000000000
RDX: ffff88808e925940 RSI: ffffffff814bc477 RDI: 0000000000000001
RBP: ffff88808e925940 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88808e925940 R14: ffffffff8e7b28b0 R15: ffff8880b983c5c0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff21f494270 CR3: 0000000156476000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __schedule+0x276/0x5790 kernel/sched/core.c:6569
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 io_schedule+0xbe/0x130 kernel/sched/core.c:8987
 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
 __wait_on_bit+0x64/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:101 [inline]
 __wait_on_buffer+0x63/0x70 fs/buffer.c:123
 wait_on_buffer include/linux/buffer_head.h:398 [inline]
 __ext4_get_inode_loc+0xac2/0x1330 fs/ext4/inode.c:4470
 __ext4_get_inode_loc_noinmem+0xb9/0x160 fs/ext4/inode.c:4489
 __ext4_iget+0x426/0x4430 fs/ext4/inode.c:4686
 ext4_lookup fs/ext4/namei.c:1851 [inline]
 ext4_lookup+0x387/0x700 fs/ext4/namei.c:1826
 __lookup_slow+0x24c/0x460 fs/namei.c:1690
 lookup_slow fs/namei.c:1707 [inline]
 walk_component+0x33f/0x5a0 fs/namei.c:1998
 link_path_walk.part.0+0x74e/0xd60 fs/namei.c:2325
 link_path_walk fs/namei.c:2250 [inline]
 path_openat+0x25c/0x2750 fs/namei.c:3787
 do_filp_open+0x1ba/0x410 fs/namei.c:3818
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1356
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2737aada46
Code: 10 00 00 00 44 8b 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 0a 48 01 00 48 83 c8 ff c3 31
RSP: 002b:00007ffff7f33bb8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffff7f33e18 RCX: 00007f2737aada46
RDX: 0000000000080000 RSI: 00007ffff7f33c30 RDI: 00000000ffffff9c
RBP: 00007ffff7f33c20 R08: 0000000000080000 R09: 00007ffff7f33c30
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffff7f33c30
R13: 0000000000000000 R14: 00007ffff7f33dff R15: 00000000ffffffff
 </TASK>