syzbot

 sign-in | mailing list | source | docs
🐞 Open [712]
🐞 Fixed [297]
🐞 Invalid [838]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

BUG: MAX_LOCKDEP_CHAINS too low!

Status: upstream: reported on 2019/04/20 01:26
Subsystems: hfsplus ext4 f2fs vfs tmpfs reiserfs nilfs2 jfs btrfs xfs hfs ntfs iso9660 fat squashfs
[Documentation on labels]
Reported-by: syzbot+9cd3ace500d75a5e1018@syzkaller.appspotmail.com
First crash: 2052d, last: 635d
▶ ▼ Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 BUG: MAX_LOCKDEP_CHAINS too low! 401 1292d 1890d 0/1 auto-closed as invalid on 2021/09/16 14:16
linux-6.1 BUG: MAX_LOCKDEP_CHAINS too low! origin:upstream missing-backport C inconclusive 59093 1h07m 635d 0/3 upstream: reported C repro on 2023/03/07 18:13
upstream BUG: MAX_LOCKDEP_CHAINS too low! (2) net C error 84838 1118d 1594d 20/28 fixed on 2021/11/10 00:50
upstream BUG: MAX_LOCKDEP_CHAINS too low! (3) no-reminders kernel C error 324112 now 1113d 0/28 upstream: reported C repro on 2021/11/14 03:47
upstream BUG: MAX_LOCKDEP_CHAINS too low! kernel C done 17240 1598d 2256d 15/28 fixed on 2020/07/17 17:58
linux-5.15 BUG: MAX_LOCKDEP_CHAINS too low! origin:upstream C 99295 5m 635d 0/3 upstream: reported C repro on 2023/03/07 16:44

Sample crash report:
new mount options do not match the existing superblock, will be ignored
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 27887 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:2259 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:2371 [inline]
 validate_chain kernel/locking/lockdep.c:2391 [inline]
 __lock_acquire.cold+0x420/0x57e kernel/locking/lockdep.c:3416
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:152
 __wake_up_common_lock+0xb0/0x170 kernel/sched/wait.c:120
 touch_mnt_namespace fs/namespace.c:780 [inline]
 touch_mnt_namespace fs/namespace.c:776 [inline]
 commit_tree+0x392/0x4a0 fs/namespace.c:916
 attach_recursive_mnt+0xb2e/0xd80 fs/namespace.c:2035
 graft_tree+0x187/0x210 fs/namespace.c:2120
 do_add_mount+0x239/0x560 fs/namespace.c:2465
 do_new_mount fs/namespace.c:2506 [inline]
 do_mount+0x1976/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f4ffbbba0f9
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:00007f4ffa12c168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4ffbcd9f80 RCX: 00007f4ffbbba0f9
RDX: 0000000020000140 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007f4ffbc15ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffffa4b0c6f R14: 00007f4ffa12c300 R15: 0000000000022000
audit: type=1804 audit(1678181539.176:1203): pid=27900 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir2013501201/syzkaller.INCy99/424/bus" dev="sda1" ino=14200 res=1
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
BTRFS info (device loop4): disabling free space tree
BTRFS info (device loop4): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (27912)
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (27924)
new mount options do not match the existing superblock, will be ignored
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
BTRFS info (device loop4): clearing 2 ro feature flag
new mount options do not match the existing superblock, will be ignored
new mount options do not match the existing superblock, will be ignored
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
audit: type=1804 audit(1678181540.026:1204): pid=27991 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir2013501201/syzkaller.INCy99/426/bus" dev="sda1" ino=14170 res=1
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (28019)
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (28038)
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS info (device loop5): disabling free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): clearing free space tree
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28075)
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
BTRFS info (device loop4): disabling free space tree
BTRFS info (device loop4): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (28158)
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (28170)
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
BTRFS info (device loop4): clearing 2 ro feature flag
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS info (device loop5): disabling free space tree
BTRFS info (device loop5): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28248)
BTRFS info (device loop5): clearing free space tree
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28274)
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
overlayfs: failed to resolve './file0': -2
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: failed to resolve './file0': -2
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: unrecognized mount option "euid=00000000000000060929" or missing value
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
overlayfs: filesystem on './bus' not supported as upperdir
IPVS: ftp: loaded support on port[0] = 21
overlayfs: unrecognized mount option "metacopy=on>nfs_export=off" or missing value
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28353)
BTRFS info (device loop5): disabling free space tree
BTRFS info (device loop5): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28398)
BTRFS info (device loop5): clearing free space tree
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS info (device loop5): disabling free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): clearing free space tree
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
9pnet: p9_fd_create_tcp (28335): problem connecting socket to 127.0.0.1
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
BTRFS info (device loop4): disabling free space tree
BTRFS info (device loop4): has skinny extents
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
BTRFS info (device loop4): clearing 2 ro feature flag
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (28533)
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (28555)
9pnet: p9_fd_create_tcp (28482): problem connecting socket to 127.0.0.1
9pnet: p9_fd_create_tcp (28500): problem connecting socket to 127.0.0.1
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28576)
BTRFS info (device loop5): disabling free space tree
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28609)
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): clearing free space tree
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
9pnet: p9_fd_create_tcp (28583): problem connecting socket to 127.0.0.1
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 28681 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0xa/0xf lib/fault-inject.c:149
 __should_failslab+0x115/0x180 mm/failslab.c:32
 should_failslab+0x5/0x10 mm/slab_common.c:1590
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 kmem_cache_alloc_trace+0x284/0x380 mm/slab.c:3623
 kmalloc include/linux/slab.h:515 [inline]
 call_modprobe kernel/kmod.c:80 [inline]
 __request_module+0x31e/0xb80 kernel/kmod.c:171
 __tcp_ulp_find_autoload net/ipv4/tcp_ulp.c:54 [inline]
 tcp_set_ulp+0x3ea/0x5f0 net/ipv4/tcp_ulp.c:146
 do_tcp_setsockopt.constprop.0+0x306/0x2340 net/ipv4/tcp.c:2790
 tcp_setsockopt net/ipv4/tcp.c:3110 [inline]
 tcp_setsockopt+0xb2/0xd0 net/ipv4/tcp.c:3102
 __sys_setsockopt+0x14d/0x240 net/socket.c:2013
 __do_sys_setsockopt net/socket.c:2024 [inline]
 __se_sys_setsockopt net/socket.c:2021 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2021
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7effd5fec0f9
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:00007effd455e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007effd610bf80 RCX: 00007effd5fec0f9
RDX: 000000000000001f RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007effd455e1d0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000020000100 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff1421d07f R14: 00007effd455e300 R15: 0000000000022000
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (28661)
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (28692)
BTRFS info (device loop4): disabling free space tree
BTRFS info (device loop4): has skinny extents
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 28697 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0xa/0xf lib/fault-inject.c:149
 __should_failslab+0x115/0x180 mm/failslab.c:32
 should_failslab+0x5/0x10 mm/slab_common.c:1590
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 __do_kmalloc mm/slab.c:3725 [inline]
 __kmalloc_track_caller+0x2a6/0x3c0 mm/slab.c:3742
 kstrdup+0x36/0x70 mm/util.c:56
 call_modprobe kernel/kmod.c:84 [inline]
 __request_module+0x33c/0xb80 kernel/kmod.c:171
 __tcp_ulp_find_autoload net/ipv4/tcp_ulp.c:54 [inline]
 tcp_set_ulp+0x3ea/0x5f0 net/ipv4/tcp_ulp.c:146
 do_tcp_setsockopt.constprop.0+0x306/0x2340 net/ipv4/tcp.c:2790
 tcp_setsockopt net/ipv4/tcp.c:3110 [inline]
 tcp_setsockopt+0xb2/0xd0 net/ipv4/tcp.c:3102
 __sys_setsockopt+0x14d/0x240 net/socket.c:2013
 __do_sys_setsockopt net/socket.c:2024 [inline]
 __se_sys_setsockopt net/socket.c:2021 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2021
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7effd5fec0f9
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:00007effd455e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007effd610bf80 RCX: 00007effd5fec0f9
RDX: 000000000000001f RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007effd455e1d0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000020000100 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff1421d07f R14: 00007effd455e300 R15: 0000000000022000
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
BTRFS info (device loop4): clearing 2 ro feature flag
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 28734 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0xa/0xf lib/fault-inject.c:149
 __should_failslab+0x115/0x180 mm/failslab.c:32
 should_failslab+0x5/0x10 mm/slab_common.c:1590
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 kmem_cache_alloc_trace+0x284/0x380 mm/slab.c:3623
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 call_usermodehelper_setup+0x84/0x300 kernel/umh.c:390
 call_modprobe kernel/kmod.c:94 [inline]
 __request_module+0x42e/0xb80 kernel/kmod.c:171
 __tcp_ulp_find_autoload net/ipv4/tcp_ulp.c:54 [inline]
 tcp_set_ulp+0x3ea/0x5f0 net/ipv4/tcp_ulp.c:146
 do_tcp_setsockopt.constprop.0+0x306/0x2340 net/ipv4/tcp.c:2790
 tcp_setsockopt net/ipv4/tcp.c:3110 [inline]
 tcp_setsockopt+0xb2/0xd0 net/ipv4/tcp.c:3102
 __sys_setsockopt+0x14d/0x240 net/socket.c:2013
 __do_sys_setsockopt net/socket.c:2024 [inline]
 __se_sys_setsockopt net/socket.c:2021 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2021
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7effd5fec0f9
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:00007effd455e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007effd610bf80 RCX: 00007effd5fec0f9
RDX: 000000000000001f RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007effd455e1d0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000020000100 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff1421d07f R14: 00007effd455e300 R15: 0000000000022000
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS info (device loop5): disabling free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): clearing free space tree
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28755)
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28787)
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28829)
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28882)
BTRFS info (device loop5): disabling free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): clearing free space tree
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
BTRFS info (device loop4): disabling free space tree
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (28933)
BTRFS info (device loop4): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (28966)
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
BTRFS info (device loop4): clearing 2 ro feature flag
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop5): force clearing of disk cache
BTRFS info (device loop5): disabling free space tree
BTRFS info (device loop5): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (29036)
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (29058)
BTRFS info (device loop5): clearing free space tree
BTRFS info (device loop5): clearing 1 ro feature flag
BTRFS info (device loop5): clearing 2 ro feature flag
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (29088)
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
BTRFS info (device loop4): disabling free space tree
BTRFS info (device loop4): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (29161)
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (29183)
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
BTRFS info (device loop4): clearing 2 ro feature flag
audit: type=1804 audit(1678181555.628:1205): pid=29223 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir3139219642/syzkaller.HC2S0D/1253/bus" dev="sda1" ino=14220 res=1
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (29230)
audit: type=1804 audit(1678181556.118:1206): pid=29231 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir3139219642/syzkaller.HC2S0D/1253/bus" dev="sda1" ino=14220 res=1

Crashes (72698):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/03/07 09:32 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 08:21 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 07:24 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 06:30 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 05:25 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 05:11 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 04:10 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 03:08 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 02:31 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 01:25 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 00:28 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 23:22 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 22:19 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 21:09 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 21:04 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 19:59 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 19:49 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 18:48 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 18:32 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 17:30 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 16:28 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 15:50 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 14:45 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 13:53 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 12:48 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 12:37 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 11:27 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 09:37 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 08:26 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 07:39 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 06:17 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 05:15 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 04:28 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 03:27 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 02:09 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/06 01:02 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/05 23:03 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/05 22:36 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/05 21:29 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/05 21:08 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/05 20:08 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/05 20:03 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/05 19:02 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: MAX_LOCKDEP_CHAINS too low!
2021/01/17 11:56 linux-4.19.y 675cc038067f 813be542 .config console log report info ci2-linux-4-19
2019/04/20 00:25 linux-4.19.y 4b0e041c9dad b0e8efcb .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.