Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [net?] [s390?] possible deadlock in smc_switch_to_fallback (2) | 0 (1) | 2024/06/24 15:15 |
syzbot |
sign-in | mailing list | source | docs |
🐞 Open [1283] ≡ Subsystems 🐞 Fixed [5436] 🐞 Invalid [12873] ⬇ Missing Backports [107] 📈 Kernel Health 📈 Bugs/Month 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes 📈 Coverage | 💬 Send us feedback |
Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [net?] [s390?] possible deadlock in smc_switch_to_fallback (2) | 0 (1) | 2024/06/24 15:15 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | possible deadlock in smc_switch_to_fallback net s390 | 43575 | 932d | 951d | 20/27 | fixed on 2022/03/08 16:11 |
====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc5-syzkaller-01074-g8fda53719a59 #0 Not tainted ------------------------------------------------------ syz.1.1574/9890 is trying to acquire lock: ffff888064c78a50 (&smc->clcsock_release_lock){+.+.}-{3:3}, at: smc_switch_to_fallback+0x35/0xd00 net/smc/af_smc.c:902 but task is already holding lock: ffff888064c78258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline] ffff888064c78258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_sendmsg+0x55/0x530 net/smc/af_smc.c:2773 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sk_lock-AF_INET){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 lock_sock_nested+0x48/0x100 net/core/sock.c:3543 do_ip_setsockopt+0x1a2d/0x3cd0 net/ipv4/ip_sockglue.c:1078 ip_setsockopt+0x63/0x100 net/ipv4/ip_sockglue.c:1417 do_sock_setsockopt+0x3af/0x720 net/socket.c:2312 __sys_setsockopt+0x1ae/0x250 net/socket.c:2335 __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2341 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 -> #1 (rtnl_mutex){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 start_sync_thread+0xdc/0x2dc0 net/netfilter/ipvs/ip_vs_sync.c:1761 do_ip_vs_set_ctl+0x442/0x13d0 net/netfilter/ipvs/ip_vs_ctl.c:2732 nf_setsockopt+0x295/0x2c0 net/netfilter/nf_sockopt.c:101 smc_setsockopt+0x275/0xe50 net/smc/af_smc.c:3072 do_sock_setsockopt+0x3af/0x720 net/socket.c:2312 __sys_setsockopt+0x1ae/0x250 net/socket.c:2335 __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2341 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 (&smc->clcsock_release_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 smc_switch_to_fallback+0x35/0xd00 net/smc/af_smc.c:902 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2779 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: Chain exists of: &smc->clcsock_release_lock --> rtnl_mutex --> sk_lock-AF_INET Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(&smc->clcsock_release_lock); *** DEADLOCK *** 1 lock held by syz.1.1574/9890: #0: ffff888064c78258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline] #0: ffff888064c78258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_sendmsg+0x55/0x530 net/smc/af_smc.c:2773 stack backtrace: CPU: 0 PID: 9890 Comm: syz.1.1574 Not tainted 6.10.0-rc5-syzkaller-01074-g8fda53719a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 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+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 smc_switch_to_fallback+0x35/0xd00 net/smc/af_smc.c:902 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2779 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7f96e9375b29 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:00007f96ea19e048 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/06/28 15:26 | net-next | 8fda53719a59 | b62c7d46 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/27 02:38 | net-next | a6a6a9809411 | 880c1ca1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/26 16:47 | net-next | a6a6a9809411 | 880c1ca1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/26 14:27 | net-next | 50b70845fc5c | 880c1ca1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/26 13:25 | net-next | 50b70845fc5c | dec8bc94 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/26 12:18 | net-next | 50b70845fc5c | dec8bc94 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/26 08:39 | net-next | 50b70845fc5c | dec8bc94 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/25 22:21 | net-next | 73cfd947dbdb | da0bd5ca | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/24 13:42 | net-next | 568ebdaba637 | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/24 02:24 | net-next | 84562f9953ec | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/23 05:42 | net-next | 185d72112b95 | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/23 05:41 | net-next | 185d72112b95 | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/22 21:15 | net-next | 185d72112b95 | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/22 11:19 | net-next | 3226607302ca | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback | ||
2024/06/21 05:58 | net-next | a6ec08beec9e | dac2aa43 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-net-kasan-gce | possible deadlock in smc_switch_to_fallback |