====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc4-syzkaller-g6a71d2909427 #0 Not tainted ------------------------------------------------------ syz-executor.3/8189 is trying to acquire lock: ffff0000dfd9aa20 (mapping.invalidate_lock#6){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:850 [inline] ffff0000dfd9aa20 (mapping.invalidate_lock#6){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xc8/0x560 mm/readahead.c:225 but task is already holding lock: ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: xdp_umem_pin_pages net/xdp/xdp_umem.c:104 [inline] ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: xdp_umem_reg net/xdp/xdp_umem.c:227 [inline] ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: xdp_umem_create+0x750/0xd6c net/xdp/xdp_umem.c:260 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc4/0x124 mm/memory.c:6220 _copy_to_user include/linux/uaccess.h:165 [inline] copy_to_user include/linux/uaccess.h:191 [inline] fiemap_fill_next_extent+0x1b4/0x424 fs/ioctl.c:145 ni_fiemap+0x744/0xe10 fs/ntfs3/frecord.c:2044 ntfs_fiemap+0x110/0x168 fs/ntfs3/file.c:1206 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1c18/0x2ab0 fs/ioctl.c:838 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:890 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 -> #1 (&ni->file.run_lock){.+.+}-{3:3}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1526 attr_data_get_block+0x238/0x23ac fs/ntfs3/attrib.c:902 ntfs_get_block_vbo+0x300/0xc18 fs/ntfs3/inode.c:587 ntfs_get_block+0x84/0xc4 fs/ntfs3/inode.c:682 do_mpage_readpage+0x584/0x1750 fs/mpage.c:232 mpage_readahead+0x360/0x644 fs/mpage.c:381 ntfs_readahead+0x19c/0x1ec fs/ntfs3/inode.c:755 read_pages+0x160/0x694 mm/readahead.c:160 page_cache_ra_unbounded+0x460/0x560 mm/readahead.c:269 do_page_cache_ra mm/readahead.c:299 [inline] page_cache_ra_order+0x74c/0x8d0 mm/readahead.c:539 ondemand_readahead+0x600/0xaf4 mm/readahead.c:661 page_cache_sync_ra+0x130/0x180 mm/readahead.c:688 page_cache_sync_readahead include/linux/pagemap.h:1300 [inline] filemap_get_pages+0x368/0x1630 mm/filemap.c:2505 filemap_splice_read+0x4c4/0xc50 mm/filemap.c:2870 ntfs_file_splice_read+0x140/0x1b0 fs/ntfs3/file.c:800 do_splice_read fs/splice.c:985 [inline] splice_file_to_pipe+0x378/0x634 fs/splice.c:1295 do_sendfile+0x40c/0xb3c fs/read_write.c:1301 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1348 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 -> #0 (mapping.invalidate_lock#6){.+.+}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137 lock_acquire+0x248/0x73c kernel/locking/lockdep.c:5754 down_read+0x58/0x2fc kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:850 [inline] page_cache_ra_unbounded+0xc8/0x560 mm/readahead.c:225 do_page_cache_ra mm/readahead.c:299 [inline] page_cache_ra_order+0x74c/0x8d0 mm/readahead.c:539 do_sync_mmap_readahead+0x368/0x74c filemap_fault+0x584/0x1004 mm/filemap.c:3289 __do_fault+0x11c/0x374 mm/memory.c:4531 do_cow_fault mm/memory.c:4924 [inline] do_fault mm/memory.c:5026 [inline] do_pte_missing mm/memory.c:3880 [inline] handle_pte_fault mm/memory.c:5300 [inline] __handle_mm_fault+0x1bb8/0x5920 mm/memory.c:5441 handle_mm_fault+0x1e8/0x63c mm/memory.c:5606 faultin_page mm/gup.c:958 [inline] __get_user_pages+0x3e0/0xa24 mm/gup.c:1241 __get_user_pages_locked mm/gup.c:1509 [inline] __gup_longterm_locked+0x444/0x1f5c mm/gup.c:2218 pin_user_pages+0x138/0x1e0 mm/gup.c:3391 xdp_umem_pin_pages net/xdp/xdp_umem.c:105 [inline] xdp_umem_reg net/xdp/xdp_umem.c:227 [inline] xdp_umem_create+0x790/0xd6c net/xdp/xdp_umem.c:260 xsk_setsockopt+0x6ac/0x944 net/xdp/xsk.c:1402 do_sock_setsockopt+0x2a0/0x4e0 net/socket.c:2311 __sys_setsockopt+0x128/0x1a8 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2340 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#6 --> &ni->file.run_lock --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&ni->file.run_lock); lock(&mm->mmap_lock); rlock(mapping.invalidate_lock#6); *** DEADLOCK *** 2 locks held by syz-executor.3/8189: #0: ffff0000d98ee670 (&xs->mutex){+.+.}-{3:3}, at: xsk_setsockopt+0x3cc/0x944 net/xdp/xsk.c:1396 #1: ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] #1: ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: xdp_umem_pin_pages net/xdp/xdp_umem.c:104 [inline] #1: ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: xdp_umem_reg net/xdp/xdp_umem.c:227 [inline] #1: ffff0000cd7e1190 (&mm->mmap_lock){++++}-{3:3}, at: xdp_umem_create+0x750/0xd6c net/xdp/xdp_umem.c:260 stack backtrace: CPU: 1 PID: 8189 Comm: syz-executor.3 Not tainted 6.9.0-rc4-syzkaller-g6a71d2909427 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2060 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137 lock_acquire+0x248/0x73c kernel/locking/lockdep.c:5754 down_read+0x58/0x2fc kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:850 [inline] page_cache_ra_unbounded+0xc8/0x560 mm/readahead.c:225 do_page_cache_ra mm/readahead.c:299 [inline] page_cache_ra_order+0x74c/0x8d0 mm/readahead.c:539 do_sync_mmap_readahead+0x368/0x74c filemap_fault+0x584/0x1004 mm/filemap.c:3289 __do_fault+0x11c/0x374 mm/memory.c:4531 do_cow_fault mm/memory.c:4924 [inline] do_fault mm/memory.c:5026 [inline] do_pte_missing mm/memory.c:3880 [inline] handle_pte_fault mm/memory.c:5300 [inline] __handle_mm_fault+0x1bb8/0x5920 mm/memory.c:5441 handle_mm_fault+0x1e8/0x63c mm/memory.c:5606 faultin_page mm/gup.c:958 [inline] __get_user_pages+0x3e0/0xa24 mm/gup.c:1241 __get_user_pages_locked mm/gup.c:1509 [inline] __gup_longterm_locked+0x444/0x1f5c mm/gup.c:2218 pin_user_pages+0x138/0x1e0 mm/gup.c:3391 xdp_umem_pin_pages net/xdp/xdp_umem.c:105 [inline] xdp_umem_reg net/xdp/xdp_umem.c:227 [inline] xdp_umem_create+0x790/0xd6c net/xdp/xdp_umem.c:260 xsk_setsockopt+0x6ac/0x944 net/xdp/xsk.c:1402 do_sock_setsockopt+0x2a0/0x4e0 net/socket.c:2311 __sys_setsockopt+0x128/0x1a8 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2340 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598