[ 31.034198] BUG: Bad rss-counter state mm:000000001a17d5f6 type:MM_FILEPAGES val:33 [ 31.035470] BUG: Bad rss-counter state mm:000000001a17d5f6 type:MM_ANONPAGES val:22 [ 31.194076] ================================================================== [ 31.194978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.195928] Read of size 8 at addr ffff88801a380798 by task sshd/219 [ 31.196709] [ 31.196928] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.197908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.198893] Call Trace: [ 31.199217] [ 31.199507] dump_stack_lvl+0x91/0xf0 [ 31.200042] print_report+0xcc/0x620 [ 31.200535] ? __virt_addr_valid+0x102/0x340 [ 31.201080] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202316] kasan_report+0xbe/0xf0 [ 31.202791] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203408] vma_interval_tree_remove+0xc75/0xec0 [ 31.204048] vma_prepare+0xc54/0x11a0 [ 31.204533] __split_vma+0x5af/0x950 [ 31.205017] ? __pfx___split_vma+0x10/0x10 [ 31.205542] ? find_held_lock+0x2c/0x110 [ 31.206059] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.206624] ? lock_is_held_type+0x9f/0x120 [ 31.207159] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.207766] ? mtree_range_walk+0x632/0x900 [ 31.208312] ? mas_walk+0x5c7/0x7c0 [ 31.208792] do_vmi_munmap+0x1f1/0x2b0 [ 31.209283] mmap_region+0x1f9/0x2660 [ 31.209761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.210272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.210983] ? __pfx_lock_acquire+0x10/0x10 [ 31.211513] ? __pfx_mmap_region+0x10/0x10 [ 31.212064] ? security_mmap_addr+0x7d/0xa0 [ 31.212598] ? get_unmapped_area+0x1f5/0x3f0 [ 31.213148] do_mmap+0x854/0xf00 [ 31.213588] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.214084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.214650] ksys_mmap_pgoff+0x3af/0x500 [ 31.215155] do_syscall_64+0x3f/0x90 [ 31.215645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216307] RIP: 0033:0x7fbada65ed82 [ 31.216767] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.218895] RSP: 002b:00007ffcf210ac88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.219816] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbada65ed82 [ 31.220665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbad9a98000 [ 31.221511] RBP: 00007fbad9a98000 R08: 0000000000000009 R09: 0000000000001000 [ 31.222356] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7e0e77f70 [ 31.223200] R13: 00007ffcf210aca0 R14: 00007ffcf210acd0 R15: 00007ffcf210b030 [ 31.224079] [ 31.224370] [ 31.224589] Allocated by task 211: [ 31.225014] kasan_save_stack+0x22/0x50 [ 31.225518] kasan_set_track+0x25/0x30 [ 31.226015] __kasan_slab_alloc+0x59/0x70 [ 31.226538] kmem_cache_alloc+0x16b/0x370 [ 31.227054] vm_area_dup+0x20/0x160 [ 31.227507] __split_vma+0x170/0x950 [ 31.227979] split_vma+0xc6/0x110 [ 31.228418] mprotect_fixup+0x8d2/0xb30 [ 31.228919] do_mprotect_pkey+0x87e/0xd40 [ 31.229446] __x64_sys_mprotect+0x78/0xc0 [ 31.229963] do_syscall_64+0x3f/0x90 [ 31.230437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231085] [ 31.231299] Freed by task 211: [ 31.231709] kasan_save_stack+0x22/0x50 [ 31.232213] kasan_set_track+0x25/0x30 [ 31.232709] kasan_save_free_info+0x2b/0x50 [ 31.233250] __kasan_slab_free+0x10a/0x190 [ 31.233787] kmem_cache_free+0x10d/0x4d0 [ 31.234296] rcu_core+0x8c8/0x2860 [ 31.234737] __do_softirq+0x1b7/0x7d4 [ 31.235214] [ 31.235434] Last potentially related work creation: [ 31.236033] kasan_save_stack+0x22/0x50 [ 31.236536] __kasan_record_aux_stack+0x8e/0xa0 [ 31.237105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237756] remove_vma+0x139/0x170 [ 31.238221] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238777] do_vmi_munmap+0x1f1/0x2b0 [ 31.239266] __vm_munmap+0x138/0x3a0 [ 31.239745] __x64_sys_munmap+0x59/0x80 [ 31.240241] do_syscall_64+0x3f/0x90 [ 31.240715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241355] [ 31.241569] The buggy address belongs to the object at ffff88801a380740 [ 31.241569] which belongs to the cache vm_area_struct of size 168 [ 31.243038] The buggy address is located 88 bytes inside of [ 31.243038] freed 168-byte region [ffff88801a380740, ffff88801a3807e8) [ 31.244462] [ 31.244676] The buggy address belongs to the physical page: [ 31.245332] page:00000000f5102437 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a380 [ 31.246416] memcg:ffff88801a344d01 [ 31.246841] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.247505] page_type: 0xffffffff() [ 31.247959] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.248872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a344d01 [ 31.249777] page dumped because: kasan: bad access detected [ 31.250436] [ 31.250652] Memory state around the buggy address: [ 31.251239] ffff88801a380680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.252106] ffff88801a380700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.252962] >ffff88801a380780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.253814] ^ [ 31.254305] ffff88801a380800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.255158] ffff88801a380880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.256024] ================================================================== [ 31.257079] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.893421] BUG: Bad rss-counter state mm:00000000b3cafc91 type:MM_FILEPAGES val:33 [ 32.894619] BUG: Bad rss-counter state mm:00000000b3cafc91 type:MM_ANONPAGES val:22 [ 33.311185] BUG: Bad rss-counter state mm:00000000ba9b1ce1 type:MM_FILEPAGES val:33 [ 33.312320] BUG: Bad rss-counter state mm:00000000ba9b1ce1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3845' (ECDSA) to the list of known hosts. 2023/06/20 13:24:43 fuzzer started 2023/06/20 13:24:43 dialing manager at localhost:36067 2023/06/20 13:24:44 checking machine... 2023/06/20 13:24:44 checking revisions... [ 33.876676] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:24:44 testing simple program... [ 33.920184] cgroup: Unknown subsys name 'net' [ 33.958960] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:24:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=1ffff1100d9c135e RSI=ffffffff866212df RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff8113062c RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=000055918de9f768 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f2afc974510000056477c1e0790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801437fe1c RCX=0000000000000000 RDX=ffff8880181e3680 RSI=ffffffff8184ccc4 RDI=ffff8880181e36a0 RBP=ffff88801437fe10 RSP=ffff88801437fc60 R8 =0000000000000007 R9 =0000000000000010 R10=ffff88801437fe10 R11=0000000000000000 R12=ffff888014378000 R13=ffff888014380000 R14=ffff88801437fe1b R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000283 [--S---C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9a881b2900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9a88769618 CR3=000000000e316000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000