syzbot

F2FS-fs (loop0): Unexpected flush for atomic writes: ino=10, npages=767
attempt to access beyond end of device
loop0: rw=2049, want=51208, limit=40427
BUG: sleeping function called from invalid context at include/linux/sched/mm.h:209
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4402, name: syz.0.24
1 lock held by syz.0.24/4402:
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pte_range mm/memory.c:1342 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pmd_range mm/memory.c:1505 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pud_range mm/memory.c:1534 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_p4d_range mm/memory.c:1555 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: unmap_page_range+0x98d/0x2520 mm/memory.c:1576
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 4402 Comm: syz.0.24 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 ___might_sleep+0x47c/0x600 kernel/sched/core.c:9658
 might_alloc include/linux/sched/mm.h:209 [inline]
 slab_pre_alloc_hook+0x42/0xc0 mm/slab.h:492
 slab_alloc_node mm/slub.c:3139 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x3d/0x290 mm/slub.c:3238
 f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2631 [inline]
 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2641 [inline]
 f2fs_register_inmem_page+0x1c9/0x6a0 fs/f2fs/segment.c:192
 f2fs_set_data_page_dirty+0x826/0xad0 fs/f2fs/data.c:3845
 zap_pte_range mm/memory.c:1377 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0xd85/0x2520 mm/memory.c:1576
 unmap_vmas+0x11b/0x230 mm/memory.c:1653
 exit_mmap+0x38f/0x5f0 mm/mmap.c:3216
 __mmput+0x115/0x3b0 kernel/fork.c:1127
 exit_mm+0x567/0x6c0 kernel/exit.c:550
 do_exit+0x5a1/0x20a0 kernel/exit.c:870
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd600a46fc9
Code: Unable to access opcode bytes at RIP 0x7fd600a46f9f.
RSP: 002b:00007fd6000950e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd600c9e098 RCX: 00007fd600a46fc9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd600c9e098
RBP: 00007fd600c9e090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd600c9e128 R14: 00007ffff9619d60 R15: 00007ffff9619e48
 </TASK>

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W        
-----------------------------
syz.0.24/4402 is trying to lock:
ffff88805d373618 (&fi->inmem_lock){+.+.}-{3:3}, at: f2fs_register_inmem_page+0x2fc/0x6a0 fs/f2fs/segment.c:201
other info that might help us debug this:
context-{4:4}
1 lock held by syz.0.24/4402:
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pte_range mm/memory.c:1342 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pmd_range mm/memory.c:1505 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pud_range mm/memory.c:1534 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_p4d_range mm/memory.c:1555 [inline]
 #0: ffff88807856ad98 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: unmap_page_range+0x98d/0x2520 mm/memory.c:1576
stack backtrace:
CPU: 1 PID: 4402 Comm: syz.0.24 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4664 [inline]
 check_wait_context kernel/locking/lockdep.c:4725 [inline]
 __lock_acquire+0x1be9/0x7c60 kernel/locking/lockdep.c:4962
 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 f2fs_register_inmem_page+0x2fc/0x6a0 fs/f2fs/segment.c:201
 f2fs_set_data_page_dirty+0x826/0xad0 fs/f2fs/data.c:3845
 zap_pte_range mm/memory.c:1377 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0xd85/0x2520 mm/memory.c:1576
 unmap_vmas+0x11b/0x230 mm/memory.c:1653
 exit_mmap+0x38f/0x5f0 mm/mmap.c:3216
 __mmput+0x115/0x3b0 kernel/fork.c:1127
 exit_mm+0x567/0x6c0 kernel/exit.c:550
 do_exit+0x5a1/0x20a0 kernel/exit.c:870
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd600a46fc9
Code: Unable to access opcode bytes at RIP 0x7fd600a46f9f.
RSP: 002b:00007fd6000950e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd600c9e098 RCX: 00007fd600a46fc9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd600c9e098
RBP: 00007fd600c9e090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd600c9e128 R14: 00007ffff9619d60 R15: 00007ffff9619e48
 </TASK>