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List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1907:b0:434:7cf6:6d20 with SMTP id e9e14a558f8ab-4348c8dcbc4mr32519985ab.11.1763087942171; Thu, 13 Nov 2025 18:39:02 -0800 (PST) Date: Thu, 13 Nov 2025 18:39:02 -0800 In-Reply-To: <9660a1c7-2796-431f-83cc-688d52e2a943@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69169646.a70a0220.3124cb.003f.GAE@google.com> Subject: Re: [syzbot] [kernel?] memory leak in do_timer_create From: syzbot To: eslam.medhat1993@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: memory leak in do_timer_create 2025/11/14 02:38:26 executed programs: 5 BUG: memory leak unreferenced object 0xffff88810956c180 (size 384): comm "syz.0.17", pid 6732, jiffies 4294946163 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 64f02d39): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4983 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x397/0x5a0 mm/slub.c:5295 alloc_posix_timer kernel/time/posix-timers.c:429 [inline] do_timer_create+0xe0/0x800 kernel/time/posix-timers.c:478 __do_sys_timer_create kernel/time/posix-timers.c:585 [inline] __se_sys_timer_create kernel/time/posix-timers.c:574 [inline] __x64_sys_timer_create+0xdb/0xf0 kernel/time/posix-timers.c:574 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff8881118c8000 (size 384): comm "syz.0.18", pid 6735, jiffies 4294946164 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc d3965a85): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4983 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x397/0x5a0 mm/slub.c:5295 alloc_posix_timer kernel/time/posix-timers.c:429 [inline] do_timer_create+0xe0/0x800 kernel/time/posix-timers.c:478 __do_sys_timer_create kernel/time/posix-timers.c:585 [inline] __se_sys_timer_create kernel/time/posix-timers.c:574 [inline] __x64_sys_timer_create+0xdb/0xf0 kernel/time/posix-timers.c:574 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff8881012d8d80 (size 384): comm "syz.0.19", pid 6739, jiffies 4294946164 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 593dfa0a): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4983 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x397/0x5a0 mm/slub.c:5295 alloc_posix_timer kernel/time/posix-timers.c:429 [inline] do_timer_create+0xe0/0x800 kernel/time/posix-timers.c:478 __do_sys_timer_create kernel/time/posix-timers.c:585 [inline] __se_sys_timer_create kernel/time/posix-timers.c:574 [inline] __x64_sys_timer_create+0xdb/0xf0 kernel/time/posix-timers.c:574 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff8881012d9080 (size 384): comm "syz.0.20", pid 6759, jiffies 4294946764 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc b63c44c): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4983 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x397/0x5a0 mm/slub.c:5295 alloc_posix_timer kernel/time/posix-timers.c:429 [inline] do_timer_create+0xe0/0x800 kernel/time/posix-timers.c:478 __do_sys_timer_create kernel/time/posix-timers.c:585 [inline] __se_sys_timer_create kernel/time/posix-timers.c:574 [inline] __x64_sys_timer_create+0xdb/0xf0 kernel/time/posix-timers.c:574 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff88810956c000 (size 384): comm "syz.0.21", pid 6761, jiffies 4294946764 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc d05d1bb6): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4983 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x397/0x5a0 mm/slub.c:5295 alloc_posix_timer kernel/time/posix-timers.c:429 [inline] do_timer_create+0xe0/0x800 kernel/time/posix-timers.c:478 __do_sys_timer_create kernel/time/posix-timers.c:585 [inline] __se_sys_timer_create kernel/time/posix-timers.c:574 [inline] __x64_sys_timer_create+0xdb/0xf0 kernel/time/posix-timers.c:574 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF Tested on: commit: 6da43bbe Merge tag 'vfio-v6.18-rc6' of https://github... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=150ab532580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb128cd5cb439809 dashboard link: https://syzkaller.appspot.com/bug?extid=9c47ad18f978d4394986 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=138dc914580000