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memory leak in fasync_helper (2)

Status: upstream: reported C repro on 2023/09/21 06:52
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+5f1acda7e06a2298fae6@syzkaller.appspotmail.com
First crash: 433d, last: 348d
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[PATCH] [RFC] net: smc: fix fasync leak in smc_release() 1 (1) 2024/03/06 13:44
[PATCH] [RFC] net: smc: fix fasync leak in smc_release() 2 (2) 2024/02/21 13:09
Re: [PATCH] net: smc: fix spurious error message from __sock_release() 1 (1) 2024/02/14 16:34
[syzbot] [fs?] memory leak in fasync_helper (2) 1 (2) 2023/09/21 08:46
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream memory leak in fasync_helper fs C 14 1751d 1812d 15/28 fixed on 2020/04/15 17:19
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2024/09/18 14:10 1h28m retest repro upstream report log
2024/07/10 13:21 12m retest repro upstream report log
2024/04/29 22:35 12m retest repro upstream report log
2024/02/18 15:21 10m retest repro upstream report log
2023/12/10 11:20 1h35m retest repro upstream report log
2023/10/01 09:20 16m retest repro upstream report log

Sample crash report:
BUG: memory leak
unreferenced object 0xffff888114ac69c0 (size 48):
  comm "syz-executor199", pid 5124, jiffies 4294947402 (age 21.830s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 81 0f 09 81 88 ff ff  ................
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114a7ecf0 (size 48):
  comm "syz-executor199", pid 5133, jiffies 4294947484 (age 21.010s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 21 ac 14 81 88 ff ff  .........!......
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114eec180 (size 48):
  comm "syz-executor199", pid 5138, jiffies 4294947529 (age 20.560s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 7a 51 09 81 88 ff ff  .........zQ.....
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114ac69c0 (size 48):
  comm "syz-executor199", pid 5124, jiffies 4294947402 (age 25.300s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 81 0f 09 81 88 ff ff  ................
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114a7ecf0 (size 48):
  comm "syz-executor199", pid 5133, jiffies 4294947484 (age 24.480s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 21 ac 14 81 88 ff ff  .........!......
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114eec180 (size 48):
  comm "syz-executor199", pid 5138, jiffies 4294947529 (age 24.030s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 7a 51 09 81 88 ff ff  .........zQ.....
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114ac69c0 (size 48):
  comm "syz-executor199", pid 5124, jiffies 4294947402 (age 26.490s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 81 0f 09 81 88 ff ff  ................
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114a7ecf0 (size 48):
  comm "syz-executor199", pid 5133, jiffies 4294947484 (age 25.670s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 21 ac 14 81 88 ff ff  .........!......
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114eec180 (size 48):
  comm "syz-executor199", pid 5138, jiffies 4294947529 (age 25.220s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 7a 51 09 81 88 ff ff  .........zQ.....
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff8881145bba00 (size 512):
  comm "kworker/0:4", pid 5093, jiffies 4294947640 (age 24.110s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 80 0b 25 86 ff ff ff ff  ..........%.....
    80 f7 54 12 81 88 ff ff c8 9b ff ff 00 00 00 00  ..T.............
  backtrace:
    [<ffffffff815744cb>] __do_kmalloc_node mm/slab_common.c:1022 [inline]
    [<ffffffff815744cb>] __kmalloc+0x4b/0x150 mm/slab_common.c:1036
    [<ffffffff83ef17b2>] kmalloc include/linux/slab.h:603 [inline]
    [<ffffffff83ef17b2>] kzalloc include/linux/slab.h:720 [inline]
    [<ffffffff83ef17b2>] neigh_alloc net/core/neighbour.c:486 [inline]
    [<ffffffff83ef17b2>] ___neigh_create+0xf2/0xe10 net/core/neighbour.c:640
    [<ffffffff8434480b>] ip6_finish_output2+0x73b/0x980 net/ipv6/ip6_output.c:126
    [<ffffffff84349c21>] __ip6_finish_output net/ipv6/ip6_output.c:196 [inline]
    [<ffffffff84349c21>] ip6_finish_output+0x291/0x510 net/ipv6/ip6_output.c:207
    [<ffffffff84349f41>] NF_HOOK_COND include/linux/netfilter.h:293 [inline]
    [<ffffffff84349f41>] ip6_output+0xa1/0x1c0 net/ipv6/ip6_output.c:228
    [<ffffffff84399fd9>] dst_output include/net/dst.h:458 [inline]
    [<ffffffff84399fd9>] NF_HOOK.constprop.0+0x49/0x110 include/linux/netfilter.h:304
    [<ffffffff8439a2c3>] mld_sendpack+0x223/0x350 net/ipv6/mcast.c:1818
    [<ffffffff8439add5>] mld_send_initial_cr.part.0.isra.0+0x75/0x80 net/ipv6/mcast.c:2237
    [<ffffffff8439dae9>] mld_send_initial_cr net/ipv6/mcast.c:2225 [inline]
    [<ffffffff8439dae9>] mld_dad_work+0x59/0x220 net/ipv6/mcast.c:2260
    [<ffffffff812c8edd>] process_one_work+0x23d/0x530 kernel/workqueue.c:2630
    [<ffffffff812c9a87>] process_scheduled_works kernel/workqueue.c:2703 [inline]
    [<ffffffff812c9a87>] worker_thread+0x327/0x590 kernel/workqueue.c:2784
    [<ffffffff812d6f5b>] kthread+0x12b/0x170 kernel/kthread.c:388
    [<ffffffff81149e95>] ret_from_fork+0x45/0x50 arch/x86/kernel/process.c:147
    [<ffffffff81002be1>] ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

BUG: memory leak
unreferenced object 0xffff888114169600 (size 512):
  comm "kworker/1:7", pid 5101, jiffies 4294947640 (age 24.110s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 80 0b 25 86 ff ff ff ff  ..........%.....
    c0 99 e3 12 81 88 ff ff c8 9b ff ff 00 00 00 00  ................
  backtrace:
    [<ffffffff815744cb>] __do_kmalloc_node mm/slab_common.c:1022 [inline]
    [<ffffffff815744cb>] __kmalloc+0x4b/0x150 mm/slab_common.c:1036
    [<ffffffff83ef17b2>] kmalloc include/linux/slab.h:603 [inline]
    [<ffffffff83ef17b2>] kzalloc include/linux/slab.h:720 [inline]
    [<ffffffff83ef17b2>] neigh_alloc net/core/neighbour.c:486 [inline]
    [<ffffffff83ef17b2>] ___neigh_create+0xf2/0xe10 net/core/neighbour.c:640
    [<ffffffff8434480b>] ip6_finish_output2+0x73b/0x980 net/ipv6/ip6_output.c:126
    [<ffffffff84349c21>] __ip6_finish_output net/ipv6/ip6_output.c:196 [inline]
    [<ffffffff84349c21>] ip6_finish_output+0x291/0x510 net/ipv6/ip6_output.c:207
    [<ffffffff84349f41>] NF_HOOK_COND include/linux/netfilter.h:293 [inline]
    [<ffffffff84349f41>] ip6_output+0xa1/0x1c0 net/ipv6/ip6_output.c:228
    [<ffffffff843836f9>] dst_output include/net/dst.h:458 [inline]
    [<ffffffff843836f9>] NF_HOOK.constprop.0+0x49/0x110 include/linux/netfilter.h:304
    [<ffffffff84383a09>] ndisc_send_skb+0x249/0x3c0 net/ipv6/ndisc.c:509
    [<ffffffff843886e5>] ndisc_send_ns+0x85/0xf0 net/ipv6/ndisc.c:667
    [<ffffffff8435cd0e>] addrconf_dad_work+0x67e/0x980 net/ipv6/addrconf.c:4213
    [<ffffffff812c8edd>] process_one_work+0x23d/0x530 kernel/workqueue.c:2630
    [<ffffffff812c9a87>] process_scheduled_works kernel/workqueue.c:2703 [inline]
    [<ffffffff812c9a87>] worker_thread+0x327/0x590 kernel/workqueue.c:2784
    [<ffffffff812d6f5b>] kthread+0x12b/0x170 kernel/kthread.c:388
    [<ffffffff81149e95>] ret_from_fork+0x45/0x50 arch/x86/kernel/process.c:147
    [<ffffffff81002be1>] ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

BUG: memory leak
unreferenced object 0xffff888114ac69c0 (size 48):
  comm "syz-executor199", pid 5124, jiffies 4294947402 (age 27.680s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 81 0f 09 81 88 ff ff  ................
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114a7ecf0 (size 48):
  comm "syz-executor199", pid 5133, jiffies 4294947484 (age 26.860s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 21 ac 14 81 88 ff ff  .........!......
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff888114eec180 (size 48):
  comm "syz-executor199", pid 5138, jiffies 4294947529 (age 26.410s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00  .........F......
    00 00 00 00 00 00 00 00 00 7a 51 09 81 88 ff ff  .........zQ.....
  backtrace:
    [<ffffffff816b06bd>] fasync_alloc fs/fcntl.c:892 [inline]
    [<ffffffff816b06bd>] fasync_add_entry fs/fcntl.c:950 [inline]
    [<ffffffff816b06bd>] fasync_helper+0x3d/0xc0 fs/fcntl.c:979
    [<ffffffff83e8f2cb>] sock_fasync+0x4b/0xa0 net/socket.c:1427
    [<ffffffff816b18d6>] ioctl_fioasync fs/ioctl.c:380 [inline]
    [<ffffffff816b18d6>] do_vfs_ioctl+0x306/0xe80 fs/ioctl.c:792
    [<ffffffff816b27d5>] __do_sys_ioctl fs/ioctl.c:869 [inline]
    [<ffffffff816b27d5>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b27d5>] __x64_sys_ioctl+0xb5/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff8881141b9600 (size 512):
  comm "kworker/1:7", pid 5101, jiffies 4294947640 (age 25.300s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 80 0b 25 86 ff ff ff ff  ..........%.....
    00 00 95 12 81 88 ff ff c8 9b ff ff 00 00 00 00  ................
  backtrace:
    [<ffffffff815744cb>] __do_kmalloc_node mm/slab_common.c:1022 [inline]
    [<ffffffff815744cb>] __kmalloc+0x4b/0x150 mm/slab_common.c:1036
    [<ffffffff83ef17b2>] kmalloc include/linux/slab.h:603 [inline]
    [<ffffffff83ef17b2>] kzalloc include/linux/slab.h:720 [inline]
    [<ffffffff83ef17b2>] neigh_alloc net/core/neighbour.c:486 [inline]
    [<ffffffff83ef17b2>] ___neigh_create+0xf2/0xe10 net/core/neighbour.c:640
    [<ffffffff8434480b>] ip6_finish_output2+0x73b/0x980 net/ipv6/ip6_output.c:126
    [<ffffffff84349c21>] __ip6_finish_output net/ipv6/ip6_output.c:196 [inline]
    [<ffffffff84349c21>] ip6_finish_output+0x291/0x510 net/ipv6/ip6_output.c:207
    [<ffffffff84349f41>] NF_HOOK_COND include/linux/netfilter.h:293 [inline]
    [<ffffffff84349f41>] ip6_output+0xa1/0x1c0 net/ipv6/ip6_output.c:228
    [<ffffffff84399fd9>] dst_output include/net/dst.h:458 [inline]
    [<ffffffff84399fd9>] NF_HOOK.constprop.0+0x49/0x110 include/linux/netfilter.h:304
    [<ffffffff8439a2c3>] mld_sendpack+0x223/0x350 net/ipv6/mcast.c:1818
    [<ffffffff8439add5>] mld_send_initial_cr.part.0.isra.0+0x75/0x80 net/ipv6/mcast.c:2237
    [<ffffffff843a16b9>] mld_send_initial_cr net/ipv6/mcast.c:2225 [inline]
    [<ffffffff843a16b9>] ipv6_mc_dad_complete+0x79/0x190 net/ipv6/mcast.c:2245
    [<ffffffff8435c4b1>] addrconf_dad_completed+0x4d1/0x6b0 net/ipv6/addrconf.c:4271
    [<ffffffff8435cac0>] addrconf_dad_work+0x430/0x980 net/ipv6/addrconf.c:4199
    [<ffffffff812c8edd>] process_one_work+0x23d/0x530 kernel/workqueue.c:2630
    [<ffffffff812c9a87>] process_scheduled_works kernel/workqueue.c:2703 [inline]
    [<ffffffff812c9a87>] worker_thread+0x327/0x590 kernel/workqueue.c:2784
    [<ffffffff812d6f5b>] kthread+0x12b/0x170 kernel/kthread.c:388
    [<ffffffff81149e95>] ret_from_fork+0x45/0x50 arch/x86/kernel/process.c:147
    [<ffffffff81002be1>] ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

BUG: memory leak
unreferenced object 0xffff88811418a000 (size 512):
  comm "kworker/1:7", pid 5101, jiffies 4294947640 (age 25.300s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 80 0b 25 86 ff ff ff ff  ..........%.....
    00 00 95 12 81 88 ff ff c8 9b ff ff 00 00 00 00  ................
  backtrace:
    [<ffffffff815744cb>] __do_kmalloc_node mm/slab_common.c:1022 [inline]
    [<ffffffff815744cb>] __kmalloc+0x4b/0x150 mm/slab_common.c:1036
    [<ffffffff83ef17b2>] kmalloc include/linux/slab.h:603 [inline]
    [<ffffffff83ef17b2>] kzalloc include/linux/slab.h:720 [inline]
    [<ffffffff83ef17b2>] neigh_alloc net/core/neighbour.c:486 [inline]
    [<ffffffff83ef17b2>] ___neigh_create+0xf2/0xe10 net/core/neighbour.c:640
    [<ffffffff8434480b>] ip6_finish_output2+0x73b/0x980 net/ipv6/ip6_output.c:126
    [<ffffffff84349c21>] __ip6_finish_output net/ipv6/ip6_output.c:196 [inline]
    [<ffffffff84349c21>] ip6_finish_output+0x291/0x510 net/ipv6/ip6_output.c:207
    [<ffffffff84349f41>] NF_HOOK_COND include/linux/netfilter.h:293 [inline]
    [<ffffffff84349f41>] ip6_output+0xa1/0x1c0 net/ipv6/ip6_output.c:228
    [<ffffffff843836f9>] dst_output include/net/dst.h:458 [inline]
    [<ffffffff843836f9>] NF_HOOK.constprop.0+0x49/0x110 include/linux/netfilter.h:304
    [<ffffffff84383a09>] ndisc_send_skb+0x249/0x3c0 net/ipv6/ndisc.c:509
    [<ffffffff8438897a>] ndisc_send_rs+0x7a/0x290 net/ipv6/ndisc.c:719
    [<ffffffff8435c198>] addrconf_dad_completed+0x1b8/0x6b0 net/ipv6/addrconf.c:4291
    [<ffffffff8435cac0>] addrconf_dad_work+0x430/0x980 net/ipv6/addrconf.c:4199
    [<ffffffff812c8edd>] process_one_work+0x23d/0x530 kernel/workqueue.c:2630
    [<ffffffff812c9a87>] process_scheduled_works kernel/workqueue.c:2703 [inline]
    [<ffffffff812c9a87>] worker_thread+0x327/0x590 kernel/workqueue.c:2784
    [<ffffffff812d6f5b>] kthread+0x12b/0x170 kernel/kthread.c:388
    [<ffffffff81149e95>] ret_from_fork+0x45/0x50 arch/x86/kernel/process.c:147
    [<ffffffff81002be1>] ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

executing program
executing program
executing program
executing program

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/17 06:42 upstream f0b0d403eabb 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-leak memory leak in fasync_helper
* Struck through repros no longer work on HEAD.