EXT4-fs (loop2): mounting ext3 file system using the ext4 subsystem
EXT4-fs (loop2): 1 truncate cleaned up
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4134, name: syz.2.16
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
4 locks held by syz.2.16/4134:
 #0: ffff888107f05d78 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0x7c/0xb0 fs/file.c:1192
 #1: ffff8881125a8148 (&type->i_mutex_dir_key#9){....}-{3:3}, at: iterate_dir+0x49/0x150 fs/readdir.c:101
 #2: ffffffff84981658 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff84981658 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff84981658 (rcu_read_lock){....}-{1:2}, at: net_generic include/net/netns/generic.h:45 [inline]
 #2: ffffffff84981658 (rcu_read_lock){....}-{1:2}, at: afs_net fs/afs/internal.h:1244 [inline]
 #2: ffffffff84981658 (rcu_read_lock){....}-{1:2}, at: afs_sb2net fs/afs/internal.h:1249 [inline]
 #2: ffffffff84981658 (rcu_read_lock){....}-{1:2}, at: afs_d2net fs/afs/internal.h:1254 [inline]
 #2: ffffffff84981658 (rcu_read_lock){....}-{1:2}, at: afs_dynroot_readdir+0x51/0x360 fs/afs/dynroot.c:330
 #3: ffff888100074be0 (&mm->mmap_lock){....}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:209 [inline]
 #3: ffff888100074be0 (&mm->mmap_lock){....}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:6249 [inline]
 #3: ffff888100074be0 (&mm->mmap_lock){....}-{3:3}, at: lock_mm_and_find_vma+0x25/0x130 mm/memory.c:6309
CPU: 0 UID: 0 PID: 4134 Comm: syz.2.16 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x3e/0xe0 lib/dump_stack.c:120
 __might_resched+0x1a4/0x1c0 kernel/sched/core.c:8767
 might_alloc include/linux/sched/mm.h:321 [inline]
 prepare_alloc_pages+0xe9/0x1f0 mm/page_alloc.c:4512
 __alloc_frozen_pages_noprof+0xbb/0x280 mm/page_alloc.c:4728
 alloc_pages_mpol+0x107/0x1f0 mm/mempolicy.c:2270
 folio_alloc_mpol_noprof+0xf/0xc0 mm/mempolicy.c:2289
 vma_alloc_folio_noprof+0x10d/0x160 mm/mempolicy.c:2324
 alloc_anon_folio mm/memory.c:4833 [inline]
 do_anonymous_page mm/memory.c:4890 [inline]
 do_pte_missing mm/memory.c:4056 [inline]
 handle_pte_fault mm/memory.c:5900 [inline]
 __handle_mm_fault mm/memory.c:6043 [inline]
 handle_mm_fault+0x1af7/0x2480 mm/memory.c:6212
 do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x299/0x6a0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:filldir+0xd0/0x180 fs/readdir.c:292
Code: d6 48 bf 00 f0 ff ff ff 7f 00 00 48 39 d6 0f 82 b0 00 00 00 48 39 fe 0f 87 a7 00 00 00 0f 01 cb 0f ae e8 48 89 6a 08 4c 89 29 <66> 89 41 10 48 63 d0 44 88 64 11 ff 49 63 ff c6 44 39 12 00 48 8d
RSP: 0018:ffffc90004a1fe00 EFLAGS: 00050283
RAX: 0000000000000020 RBX: ffff8881063bad91 RCX: 0000200000001ff0
RDX: 0000200000001fd8 RSI: 0000200000002010 RDI: 00007ffffffff000
RBP: 0000000000000004 R08: 0000000000000002 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff816dba40 R12: 0000000000000004
R13: 0000000000000002 R14: ffffc90004a1feb0 R15: 0000000000000005
 dir_emit include/linux/fs.h:3851 [inline]
 afs_dynroot_readdir_cells fs/afs/dynroot.c:309 [inline]
 afs_dynroot_readdir+0x2bf/0x360 fs/afs/dynroot.c:351
 iterate_dir+0x80/0x150 fs/readdir.c:108
 __do_sys_getdents fs/readdir.c:322 [inline]
 __se_sys_getdents+0x70/0x110 fs/readdir.c:308
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ccb78d169
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:00007f2ccc61c038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f2ccb9a5fa0 RCX: 00007f2ccb78d169
RDX: 00000000000000b8 RSI: 0000200000001fc0 RDI: 0000000000000004
RBP: 00007f2ccb80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2ccb9a5fa0 R15: 00007fffb356d138
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 bf 00 f0 ff ff ff 	movabs $0x7ffffffff000,%rdi
   7:	7f 00 00
   a:	48 39 d6             	cmp    %rdx,%rsi
   d:	0f 82 b0 00 00 00    	jb     0xc3
  13:	48 39 fe             	cmp    %rdi,%rsi
  16:	0f 87 a7 00 00 00    	ja     0xc3
  1c:	0f 01 cb             	stac
  1f:	0f ae e8             	lfence
  22:	48 89 6a 08          	mov    %rbp,0x8(%rdx)
  26:	4c 89 29             	mov    %r13,(%rcx)
* 29:	66 89 41 10          	mov    %ax,0x10(%rcx) <-- trapping instruction
  2d:	48 63 d0             	movslq %eax,%rdx
  30:	44 88 64 11 ff       	mov    %r12b,-0x1(%rcx,%rdx,1)
  35:	49 63 ff             	movslq %r15d,%rdi
  38:	c6 44 39 12 00       	movb   $0x0,0x12(%rcx,%rdi,1)
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d