ci2 starts bisection 2023-11-07 22:58:47.486830516 +0000 UTC m=+78301.979393277 bisecting fixing commit since ca48fc16c49388400eddd6c6614593ebf7c7726a building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb ensuring issue is reproducible on original commit ca48fc16c49388400eddd6c6614593ebf7c7726a testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 80e5552bd1b8ebbe01325078da42a0c9fc34e064803f1cf8884ed613d198c4cd all runs: crashed: possible deadlock in ext4_xattr_inode_iget representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 73a68b80ea926b5cfff8bdab197b6e25209bd21a1814905636e3f257dfe60734 all runs: crashed: possible deadlock in ext4_xattr_inode_iget representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [BUG KASAN ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed kconfig minimization: base=3820 full=7524 leaves diff=1994 split chunks (needed=false): <1994> split chunk #0 of len 1994 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 31d0c161e246de2d0aa811a37ff4666511266b88304fabc9d7f3af2eba1e2617 run #0: crashed: possible deadlock in ext4_xattr_inode_iget run #1: crashed: possible deadlock in ext4_xattr_inode_iget run #2: crashed: possible deadlock in ext4_xattr_inode_iget run #3: crashed: possible deadlock in ext4_xattr_inode_iget run #4: crashed: possible deadlock in ext4_xattr_inode_iget run #5: crashed: possible deadlock in ext4_xattr_inode_iget run #6: crashed: possible deadlock in ext4_xattr_inode_iget run #7: crashed: possible deadlock in ext4_xattr_inode_iget run #8: crashed: possible deadlock in ext4_xattr_inode_iget run #9: boot failed: can't ssh into the instance representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8f3eb798f91214f6eb96e6390c83a96d8f0255a5fdc516cbc6ca19e717076536 all runs: crashed: possible deadlock in ext4_xattr_inode_iget representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [BUG KASAN ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9d6b890464fe1c7182d843f033b983dd1a7d9f80f14d6c128741837506f4ed81 all runs: crashed: possible deadlock in ext4_xattr_inode_iget representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fda8d32addcf096fc11676c9e96cedf744e1e34f380ef3959973dbabb4b18a28 all runs: crashed: possible deadlock in ext4_xattr_inode_iget representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9ce865e40e6a292a412a5ba013c3c1d3a01aa8bcf30ac9143893d9b349f0c16e all runs: crashed: possible deadlock in ext4_xattr_inode_iget representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] the chunk can be dropped disabling configs for [BUG KASAN ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD 4a61839152cc3e9e00ac059d73a28d148d622b30 testing commit 4a61839152cc3e9e00ac059d73a28d148d622b30 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 62627b9a8bfbbf7c7bbe7b5873eece5083a731ee98cf37fdc798ac2195d78791 all runs: crashed: possible deadlock in ext4_xattr_inode_iget representative crash: possible deadlock in ext4_xattr_inode_iget, types: [LOCKDEP] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h23m44.426305645s (build: 36m26.793202047s, test: 41m57.481127425s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.61 crash: possible deadlock in ext4_xattr_inode_iget EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. ====================================================== WARNING: possible circular locking dependency detected 6.1.61-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/1515 is trying to acquire lock: ffff888114d962b0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] ffff888114d962b0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x151/0x170 fs/ext4/xattr.c:425 but task is already holding lock: ffff888114d94e48 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x5dd/0x700 fs/ext4/inode.c:5535 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem/3){++++}-{3:3}: down_write+0x26/0xc0 kernel/locking/rwsem.c:1573 ext4_update_i_disksize fs/ext4/ext4.h:3377 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1397 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1545 [inline] ext4_xattr_set_entry+0xca9/0x11b0 fs/ext4/xattr.c:1669 ext4_xattr_ibody_set+0x53/0xa0 fs/ext4/xattr.c:2237 ext4_xattr_set_handle+0x41a/0x690 fs/ext4/xattr.c:2394 ext4_xattr_set+0xe3/0x170 fs/ext4/xattr.c:2508 __vfs_setxattr+0x105/0x130 fs/xattr.c:182 __vfs_setxattr_noperm+0x8e/0x1f0 fs/xattr.c:216 vfs_setxattr+0xde/0x170 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x131/0x170 fs/xattr.c:617 path_setxattr+0xab/0x120 fs/xattr.c:636 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __x64_sys_setxattr+0x22/0x30 fs/xattr.c:648 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3824 [inline] __lock_acquire+0x1464/0x2830 kernel/locking/lockdep.c:5048 lock_acquire+0xe3/0x270 kernel/locking/lockdep.c:5661 down_write+0x26/0xc0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:756 [inline] ext4_xattr_inode_iget+0x151/0x170 fs/ext4/xattr.c:425 ext4_xattr_inode_get+0x4f/0x210 fs/ext4/xattr.c:485 ext4_xattr_move_to_block fs/ext4/xattr.c:2590 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2692 [inline] ext4_expand_extra_isize_ea+0x43c/0x850 fs/ext4/xattr.c:2784 __ext4_expand_extra_isize+0xbc/0x130 fs/ext4/inode.c:5907 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5950 [inline] __ext4_mark_inode_dirty+0x17f/0x230 fs/ext4/inode.c:6028 ext4_setattr+0x607/0x700 fs/ext4/inode.c:5538 notify_change+0x3c2/0x420 fs/attr.c:499 do_truncate+0xdd/0x120 fs/open.c:65 handle_truncate fs/namei.c:3217 [inline] do_open fs/namei.c:3562 [inline] path_openat+0xb69/0xc40 fs/namei.c:3715 do_filp_open+0xa8/0x150 fs/namei.c:3742 do_sys_openat2+0x89/0x160 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_creat fs/open.c:1410 [inline] __se_sys_creat fs/open.c:1404 [inline] __x64_sys_creat+0x42/0x60 fs/open.c:1404 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#7/1); lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#7/1); *** DEADLOCK *** 5 locks held by syz-executor.0/1515: #0: ffff88810664b438 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0xe/0x30 fs/namespace.c:393 #1: ffff888114d94fc0 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff888114d94fc0 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: do_truncate+0xcd/0x120 fs/open.c:63 #2: ffff888114d95160 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #2: ffff888114d95160 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0x3ff/0x700 fs/ext4/inode.c:5495 #3: ffff888114d94e48 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x5dd/0x700 fs/ext4/inode.c:5535 #4: ffff888114d94c88 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #4: ffff888114d94c88 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5947 [inline] #4: ffff888114d94c88 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x149/0x230 fs/ext4/inode.c:6028 stack backtrace: CPU: 0 PID: 1515 Comm: syz-executor.0 Not tainted 6.1.61-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x89/0xd7 lib/dump_stack.c:106 print_circular_bug+0x2c5/0x300 kernel/locking/lockdep.c:2048 check_noncircular+0x106/0x110 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3824 [inline] __lock_acquire+0x1464/0x2830 kernel/locking/lockdep.c:5048 lock_acquire+0xe3/0x270 kernel/locking/lockdep.c:5661 down_write+0x26/0xc0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:756 [inline] ext4_xattr_inode_iget+0x151/0x170 fs/ext4/xattr.c:425 ext4_xattr_inode_get+0x4f/0x210 fs/ext4/xattr.c:485 ext4_xattr_move_to_block fs/ext4/xattr.c:2590 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2692 [inline] ext4_expand_extra_isize_ea+0x43c/0x850 fs/ext4/xattr.c:2784 __ext4_expand_extra_isize+0xbc/0x130 fs/ext4/inode.c:5907 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5950 [inline] __ext4_mark_inode_dirty+0x17f/0x230 fs/ext4/inode.c:6028 ext4_setattr+0x607/0x700 fs/ext4/inode.c:5538 notify_change+0x3c2/0x420 fs/attr.c:499 do_truncate+0xdd/0x120 fs/open.c:65 handle_truncate fs/namei.c:3217 [inline] do_open fs/namei.c:3562 [inline] path_openat+0xb69/0xc40 fs/namei.c:3715 do_filp_open+0xa8/0x150 fs/namei.c:3742 do_sys_openat2+0x89/0x160 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_creat fs/open.c:1410 [inline] __se_sys_creat fs/open.c:1404 [inline] __x64_sys_creat+0x42/0x60 fs/open.c:1404 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7b99fb9959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7b99b3c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f7b9a0d8f80 RCX: 00007f7b99fb9959 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f7b9a015c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f7b9a0d8f80 R15: 00007ffdc07d9038