| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <6835c01c.a70a0220.253bc2.00b7.GAE@google.com> Date: Tue, 27 May 2025 06:37:32 -0700 From: syzbot <syzbot+5dd4e428fa723938e6fd@...kaller.appspotmail.com> To: akpm@...ux-foundation.org, cgroups@...r.kernel.org, hannes@...xchg.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, mhocko@...nel.org, muchun.song@...ux.dev, roman.gushchin@...ux.dev, shakeel.butt@...ux.dev, syzkaller-bugs@...glegroups.com Subject: [syzbot] [mm?] [cgroups?] general protection fault in refill_obj_stock Hello, syzbot found the following issue on: HEAD commit: 914873bc7df9 Merge tag 'x86-build-2025-05-25' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12dcf882580000 kernel config: https://syzkaller.appspot.com/x/.config?x=231a962e5fdb804b dashboard link: https://syzkaller.appspot.com/bug?extid=5dd4e428fa723938e6fd compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ecae640d0786/disk-914873bc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d451e50efeae/vmlinux-914873bc.xz kernel image: https://storage.googleapis.com/syzbot-assets/8f7363263e49/bzImage-914873bc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5dd4e428fa723938e6fd@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xffff11019a0ac400: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0xfff8a80cd0562000-0xfff8a80cd0562007] CPU: 0 UID: 0 PID: 13104 Comm: dhcpcd Not tainted 6.15.0-syzkaller-01972-g914873bc7df9 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:percpu_ref_get_many include/linux/percpu-refcount.h:205 [inline] RIP: 0010:percpu_ref_get include/linux/percpu-refcount.h:222 [inline] RIP: 0010:obj_cgroup_get include/linux/memcontrol.h:760 [inline] RIP: 0010:replace_stock_objcg mm/memcontrol.c:2772 [inline] RIP: 0010:refill_obj_stock+0x1e1/0x7d0 mm/memcontrol.c:2950 Code: 02 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 96 05 00 00 49 8b 04 24 a8 03 0f 85 23 03 00 00 <65> 48 ff 00 e8 a6 40 ff ff 49 8d 7c 24 18 be 04 00 00 00 48 89 7c RSP: 0018:ffffc90002e27928 EFLAGS: 00010046 RAX: ffff888075701400 RBX: ffffffff93a8a0c0 RCX: 0000000028853866 RDX: 1ffff1100d2a5000 RSI: ffffffff8bf4fb80 RDI: ffffffff8dcf8da0 RBP: ffffffff908687e4 R08: 85b13f40d71cc5de R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888069528000 R13: 0000000000000078 R14: ffff8880b84350c0 R15: ffff8880b8435108 FS: 0000000000000000(0000) GS:ffff8881249ab000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563fcc194660 CR3: 000000004f19d000 CR4: 0000000000350ef0 Call Trace: <TASK> obj_cgroup_uncharge mm/memcontrol.c:3013 [inline] __memcg_slab_free_hook+0x23d/0x610 mm/memcontrol.c:3100 memcg_slab_free_hook mm/slub.c:2205 [inline] slab_free mm/slub.c:4639 [inline] kmem_cache_free+0x37e/0x4d0 mm/slub.c:4744 anon_vma_chain_free mm/rmap.c:147 [inline] unlink_anon_vmas+0x173/0x820 mm/rmap.c:421 free_pgtables+0x2d4/0x810 mm/memory.c:391 exit_mmap+0x3fb/0xb90 mm/mmap.c:1295 __mmput+0x12a/0x410 kernel/fork.c:1381 mmput+0x62/0x70 kernel/fork.c:1404 exit_mm kernel/exit.c:595 [inline] do_exit+0xa3a/0x2c70 kernel/exit.c:947 do_group_exit+0xd3/0x2a0 kernel/exit.c:1108 __do_sys_exit_group kernel/exit.c:1119 [inline] __se_sys_exit_group kernel/exit.c:1117 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1117 x64_sys_call+0x1530/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fad55e056c5 Code: Unable to access opcode bytes at 0x7fad55e0569b. RSP: 002b:00007ffdf148a868 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fad55e056c5 RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000001 RBP: 00007ffdf148ae78 R08: 0000563fee1c62c0 R09: 0000000000000002 R10: 00000000000000e0 R11: 0000000000000206 R12: 00007ffdf148a8b0 R13: 0000563fee1c7950 R14: 00007ffdf148aaf0 R15: 00007ffdf148a8a0 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:percpu_ref_get_many include/linux/percpu-refcount.h:205 [inline] RIP: 0010:percpu_ref_get include/linux/percpu-refcount.h:222 [inline] RIP: 0010:obj_cgroup_get include/linux/memcontrol.h:760 [inline] RIP: 0010:replace_stock_objcg mm/memcontrol.c:2772 [inline] RIP: 0010:refill_obj_stock+0x1e1/0x7d0 mm/memcontrol.c:2950 Code: 02 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 96 05 00 00 49 8b 04 24 a8 03 0f 85 23 03 00 00 <65> 48 ff 00 e8 a6 40 ff ff 49 8d 7c 24 18 be 04 00 00 00 48 89 7c RSP: 0018:ffffc90002e27928 EFLAGS: 00010046 RAX: ffff888075701400 RBX: ffffffff93a8a0c0 RCX: 0000000028853866 RDX: 1ffff1100d2a5000 RSI: ffffffff8bf4fb80 RDI: ffffffff8dcf8da0 RBP: ffffffff908687e4 R08: 85b13f40d71cc5de R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888069528000 R13: 0000000000000078 R14: ffff8880b84350c0 R15: ffff8880b8435108 FS: 0000000000000000(0000) GS:ffff8881249ab000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563fcc194660 CR3: 000000004f19d000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 9: fc ff df c: 4c 89 e2 mov %r12,%rdx f: 48 c1 ea 03 shr $0x3,%rdx 13: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 17: 0f 85 96 05 00 00 jne 0x5b3 1d: 49 8b 04 24 mov (%r12),%rax 21: a8 03 test $0x3,%al 23: 0f 85 23 03 00 00 jne 0x34c * 29: 65 48 ff 00 incq %gs:(%rax) <-- trapping instruction 2d: e8 a6 40 ff ff call 0xffff40d8 32: 49 8d 7c 24 18 lea 0x18(%r12),%rdi 37: be 04 00 00 00 mov $0x4,%esi 3c: 48 rex.W 3d: 89 .byte 0x89 3e: 7c .byte 0x7c --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
Powered by blists - more mailing lists