loop0: detected capacity change from 0 to 32768 XFS: noikeep mount option is deprecated. XFS (loop0): Mounting V5 Filesystem a2f82aab-77f8-4286-afd4-a8f747a74bab XFS (loop0): Ending clean mount XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. mmap: syz.0.0 (5106) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. ====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0 Not tainted ------------------------------------------------------ syz.0.0/5106 is trying to acquire lock: ffff88804d02da70 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] ffff88804d02da70 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 but task is already holding lock: ffff8880121f9498 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] ffff8880121f9498 (&mm->mmap_lock){++++}-{3:3}, at: __do_sys_remap_file_pages mm/mmap.c:1659 [inline] ffff8880121f9498 (&mm->mmap_lock){++++}-{3:3}, at: __se_sys_remap_file_pages+0x22d/0xa50 mm/mmap.c:1634 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 gup_fast_fallback+0x249/0x2b60 mm/gup.c:3364 pin_user_pages_fast+0xcc/0x160 mm/gup.c:3488 iov_iter_extract_user_pages lib/iov_iter.c:1815 [inline] iov_iter_extract_pages+0x3bb/0x5c0 lib/iov_iter.c:1878 __bio_iov_iter_get_pages block/bio.c:1334 [inline] bio_iov_iter_get_pages+0x55d/0x1df0 block/bio.c:1423 iomap_dio_bio_iter+0xbbe/0x1630 fs/iomap/direct-io.c:405 __iomap_dio_rw+0x1293/0x2370 fs/iomap/direct-io.c:678 iomap_dio_rw+0x46/0xa0 fs/iomap/direct-io.c:767 xfs_file_dio_write_aligned+0x1a0/0x2c0 fs/xfs/xfs_file.c:614 xfs_file_dio_write fs/xfs/xfs_file.c:726 [inline] xfs_file_write_iter+0x50b/0x620 fs/xfs/xfs_file.c:862 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:815 [inline] process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 ima_file_mmap+0x13d/0x2b0 security/integrity/ima/ima_main.c:455 security_mmap_file+0x7e7/0xa40 security/security.c:2979 __do_sys_remap_file_pages mm/mmap.c:1702 [inline] __se_sys_remap_file_pages+0x6e6/0xa50 mm/mmap.c:1634 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#20); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#20); *** DEADLOCK *** 1 lock held by syz.0.0/5106: #0: ffff8880121f9498 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #0: ffff8880121f9498 (&mm->mmap_lock){++++}-{3:3}, at: __do_sys_remap_file_pages mm/mmap.c:1659 [inline] #0: ffff8880121f9498 (&mm->mmap_lock){++++}-{3:3}, at: __se_sys_remap_file_pages+0x22d/0xa50 mm/mmap.c:1634 stack backtrace: CPU: 0 UID: 0 PID: 5106 Comm: syz.0.0 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:815 [inline] process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 ima_file_mmap+0x13d/0x2b0 security/integrity/ima/ima_main.c:455 security_mmap_file+0x7e7/0xa40 security/security.c:2979 __do_sys_remap_file_pages mm/mmap.c:1702 [inline] __se_sys_remap_file_pages+0x6e6/0xa50 mm/mmap.c:1634 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff71157dff9 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:00007ff712420038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d8 RAX: ffffffffffffffda RBX: 00007ff711735f80 RCX: 00007ff71157dff9 RDX: 0000000000000000 RSI: 0000000000004000 RDI: 00000000200ae000 RBP: 00007ff7115f0296 R08: 0000000000004000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff711735f80 R15: 00007fffd038b988