BUG: sleeping function called from invalid context at include/linux/sched/mm.h:306 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 9532, name: syz-executor.4 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 4 locks held by syz-executor.4/9532: #0: ffff88814bfa4b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 #1: ffff88814bfa6990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb4/0x14e0 fs/jbd2/transaction.c:461 #2: ffff888020ae8c88 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x707/0x18d0 fs/ext4/inode.c:616 #3: ffffffff8c7991c0 (rcu_read_lock){....}-{1:2}, at: lru_gen_refault mm/workingset.c:293 [inline] #3: ffffffff8c7991c0 (rcu_read_lock){....}-{1:2}, at: workingset_refault+0x175/0x11e0 mm/workingset.c:528 CPU: 1 PID: 9532 Comm: syz-executor.4 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: __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_gfp include/linux/buffer_head.h:376 [inline] ext4_ext_grow_indepth fs/ext4/extents.c:1334 [inline] ext4_ext_create_new_leaf fs/ext4/extents.c:1435 [inline] ext4_ext_insert_extent+0x1227/0x4130 fs/ext4/extents.c:2102 ext4_ext_map_blocks+0x134d/0x5be0 fs/ext4/extents.c:4307 ext4_map_blocks+0x779/0x18d0 fs/ext4/inode.c:623 mpage_map_one_extent fs/ext4/inode.c:2183 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2236 [inline] ext4_do_writepages+0x153f/0x2f40 fs/ext4/inode.c:2703 ext4_writepages+0x304/0x770 fs/ext4/inode.c:2792 do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 filemap_fdatawrite_wbc mm/filemap.c:393 [inline] filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:383 __filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:426 ext4_alloc_da_blocks+0x1e8/0x270 fs/ext4/inode.c:3056 ext4_release_file+0x181/0x370 fs/ext4/file.c:158 __fput+0x27c/0xa90 fs/file_table.c:321 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xb0d/0x29f0 kernel/exit.c:871 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021 get_signal+0x2315/0x25b0 kernel/signal.c:2874 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1593 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 002b:0000000020000008 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f43f6babf80 RCX: 00007f43f6a8c169 RDX: 0000000020000040 RSI: 0000000020000000 RDI: 00000000d0022000 RBP: 00007f43f6ae7ca1 R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffc49f438cf R14: 00007f43f7774300 R15: 0000000000022000 ------------[ cut here ]------------ Voluntary context switch within RCU read-side critical section! WARNING: CPU: 1 PID: 9532 at kernel/rcu/tree_plugin.h:320 rcu_note_context_switch+0xbb9/0x1800 kernel/rcu/tree_plugin.h:320 Modules linked in: CPU: 1 PID: 9532 Comm: syz-executor.4 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:ffffc9001f0d6850 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff8880b993d4c0 RCX: 0000000000000000 RDX: ffff8880375b0000 RSI: ffffffff814bc477 RDI: 0000000000000001 RBP: ffff8880375b0000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 216e6f6974636573 R12: 0000000000000000 R13: ffff8880375b0000 R14: ffffffff8e7b28b0 R15: ffff8880b993c5c0 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563710254950 CR3: 000000014f426000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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_wait_block_bitmap+0x1c6/0x280 fs/ext4/balloc.c:573 ext4_mb_init_cache+0x53e/0x13d0 fs/ext4/mballoc.c:1213 ext4_mb_load_buddy_gfp+0xc72/0x13e0 fs/ext4/mballoc.c:1511 ext4_mb_load_buddy fs/ext4/mballoc.c:1592 [inline] ext4_mb_regular_allocator+0xc1d/0x3a40 fs/ext4/mballoc.c:2727 ext4_mb_new_blocks+0x1ff5/0x4790 fs/ext4/mballoc.c:5837 ext4_ext_map_blocks+0x1fdb/0x5be0 fs/ext4/extents.c:4286 ext4_map_blocks+0x779/0x18d0 fs/ext4/inode.c:623 mpage_map_one_extent fs/ext4/inode.c:2183 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2236 [inline] ext4_do_writepages+0x153f/0x2f40 fs/ext4/inode.c:2703 ext4_writepages+0x304/0x770 fs/ext4/inode.c:2792 do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 filemap_fdatawrite_wbc mm/filemap.c:393 [inline] filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:383 __filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:426 ext4_alloc_da_blocks+0x1e8/0x270 fs/ext4/inode.c:3056 ext4_release_file+0x181/0x370 fs/ext4/file.c:158 __fput+0x27c/0xa90 fs/file_table.c:321 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xb0d/0x29f0 kernel/exit.c:871 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021 get_signal+0x2315/0x25b0 kernel/signal.c:2874 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1593 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 002b:0000000020000008 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f43f6babf80 RCX: 00007f43f6a8c169 RDX: 0000000020000040 RSI: 0000000020000000 RDI: 00000000d0022000 RBP: 00007f43f6ae7ca1 R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffc49f438cf R14: 00007f43f7774300 R15: 0000000000022000