Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | possible deadlock in ext4_setattr ext4 | C | done | 7 | 212d | 331d | 24/25 | fixed on 2023/07/01 16:05 |
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Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | possible deadlock in ext4_setattr ext4 | C | done | 7 | 212d | 331d | 24/25 | fixed on 2023/07/01 16:05 |
====================================================== WARNING: possible circular locking dependency detected 5.15.104-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/8716 is trying to acquire lock: ffff888039a62d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] ffff888039a62d70 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xdaa/0x1990 fs/ext4/inode.c:5446 but task is already holding lock: ffff888039a62bd0 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] ffff888039a62bd0 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: do_truncate+0x208/0x300 fs/open.c:63 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 inode_lock include/linux/fs.h:787 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1475 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1558 [inline] ext4_xattr_set_entry+0x33c5/0x3c00 fs/ext4/xattr.c:1686 ext4_xattr_block_set+0xb10/0x3680 fs/ext4/xattr.c:1992 ext4_xattr_set_handle+0xdac/0x1560 fs/ext4/xattr.c:2407 ext4_xattr_set+0x231/0x3d0 fs/ext4/xattr.c:2508 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x27e/0x2e0 fs/xattr.c:611 path_setxattr+0x1bc/0x2a0 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:642 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #1 (&ei->xattr_sem){++++}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_convert_inline_data+0x3ab/0x610 fs/ext4/inline.c:2043 ext4_page_mkwrite+0x1ec/0x1290 fs/ext4/inode.c:6103 do_page_mkwrite+0x1a9/0x440 mm/memory.c:2883 wp_page_shared+0x179/0x690 mm/memory.c:3216 handle_pte_fault mm/memory.c:4612 [inline] __handle_mm_fault mm/memory.c:4729 [inline] handle_mm_fault+0x2a3d/0x5950 mm/memory.c:4827 do_user_addr_fault arch/x86/mm/fault.c:1397 [inline] handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568 -> #0 (mapping.invalidate_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 filemap_invalidate_lock include/linux/fs.h:832 [inline] ext4_setattr+0xdaa/0x1990 fs/ext4/inode.c:5446 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb other info that might help us debug this: Chain exists of: mapping.invalidate_lock --> &ei->xattr_sem --> &ea_inode->i_rwsem#9/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ea_inode->i_rwsem#9/1); lock(&ei->xattr_sem); lock(&ea_inode->i_rwsem#9/1); lock(mapping.invalidate_lock); *** DEADLOCK *** 2 locks held by syz-executor.2/8716: #0: ffff8880396c2460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 #1: ffff888039a62bd0 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff888039a62bd0 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: do_truncate+0x208/0x300 fs/open.c:63 stack backtrace: CPU: 1 PID: 8716 Comm: syz-executor.2 Not tainted 5.15.104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 filemap_invalidate_lock include/linux/fs.h:832 [inline] ext4_setattr+0xdaa/0x1990 fs/ext4/inode.c:5446 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f72704850f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7266616168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f72705a5050 RCX: 00007f72704850f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f72704e0b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe414369ff R14: 00007f7266616300 R15: 0000000000022000 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/03/23 04:14 | linux-5.15.y | 115472395b0a | f94b4a29 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in ext4_setattr | ||
2023/03/22 05:46 | linux-5.15.y | 8020ae3c051d | 8b4eb097 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in ext4_setattr | ||
2023/03/21 21:24 | linux-5.15.y | 8020ae3c051d | 8b4eb097 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in ext4_setattr | ||
2023/03/20 21:19 | linux-5.15.y | 8020ae3c051d | 7939252e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in ext4_setattr | ||
2023/03/20 14:49 | linux-5.15.y | 8020ae3c051d | 7939252e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in ext4_setattr | ||
2023/03/18 03:29 | linux-5.15.y | 8020ae3c051d | 7939252e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | possible deadlock in ext4_setattr |