syzkaller login: [ 31.155881] BUG: Bad rss-counter state mm:000000006fd1e142 type:MM_FILEPAGES val:33 [ 31.157476] BUG: Bad rss-counter state mm:000000006fd1e142 type:MM_ANONPAGES val:22 [ 31.311872] ================================================================== [ 31.312972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.314105] Read of size 8 at addr ffff888019d03df0 by task sshd/220 [ 31.315199] [ 31.315457] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.316486] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.317652] Call Trace: [ 31.318063] [ 31.318406] dump_stack_lvl+0x91/0xf0 [ 31.318983] print_report+0xcc/0x620 [ 31.319487] ? __virt_addr_valid+0x102/0x340 [ 31.320040] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.320670] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321288] kasan_report+0xbe/0xf0 [ 31.321768] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.322403] vma_interval_tree_remove+0xc75/0xec0 [ 31.322998] vma_prepare+0xc54/0x11a0 [ 31.323472] __split_vma+0x5af/0x950 [ 31.323940] ? __pfx___split_vma+0x10/0x10 [ 31.324474] ? find_held_lock+0x2c/0x110 [ 31.324995] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.325570] ? lock_is_held_type+0x9f/0x120 [ 31.326121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.326728] ? mtree_range_walk+0x632/0x900 [ 31.327285] ? mas_walk+0x5c7/0x7c0 [ 31.327765] do_vmi_munmap+0x1f1/0x2b0 [ 31.328264] mmap_region+0x1f9/0x2660 [ 31.328749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.329260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.329967] ? __pfx_lock_acquire+0x10/0x10 [ 31.330523] ? __pfx_mmap_region+0x10/0x10 [ 31.331062] ? security_mmap_addr+0x7d/0xa0 [ 31.331599] ? get_unmapped_area+0x1f5/0x3f0 [ 31.332162] do_mmap+0x854/0xf00 [ 31.332607] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.333104] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.333664] ksys_mmap_pgoff+0x3af/0x500 [ 31.334201] do_syscall_64+0x3f/0x90 [ 31.334678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335328] RIP: 0033:0x7fc4a8e22d82 [ 31.335796] 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 [ 31.337931] RSP: 002b:00007ffcc313b988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.338920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4a8e22d82 [ 31.339828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4a825c000 [ 31.340747] RBP: 00007fc4a825c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.341668] R10: 0000000000000812 R11: 0000000000000206 R12: 000055963c145f70 [ 31.342597] R13: 00007ffcc313b9a0 R14: 00007ffcc313b9d0 R15: 00007ffcc313bd30 [ 31.343515] [ 31.343829] [ 31.344056] Allocated by task 213: [ 31.344515] kasan_save_stack+0x22/0x50 [ 31.345052] kasan_set_track+0x25/0x30 [ 31.345577] __kasan_slab_alloc+0x59/0x70 [ 31.346147] kmem_cache_alloc+0x16b/0x370 [ 31.346697] vm_area_dup+0x20/0x160 [ 31.347176] __split_vma+0x170/0x950 [ 31.347673] split_vma+0xc6/0x110 [ 31.348137] mprotect_fixup+0x8d2/0xb30 [ 31.348669] do_mprotect_pkey+0x87e/0xd40 [ 31.349225] __x64_sys_mprotect+0x78/0xc0 [ 31.349779] do_syscall_64+0x3f/0x90 [ 31.350299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350982] [ 31.351210] Freed by task 213: [ 31.351619] kasan_save_stack+0x22/0x50 [ 31.352149] kasan_set_track+0x25/0x30 [ 31.352678] kasan_save_free_info+0x2b/0x50 [ 31.353243] __kasan_slab_free+0x10a/0x190 [ 31.353814] kmem_cache_free+0x10d/0x4d0 [ 31.354362] rcu_core+0x8c8/0x2860 [ 31.354832] __do_softirq+0x1b7/0x7d4 [ 31.355424] [ 31.355651] Last potentially related work creation: [ 31.356279] kasan_save_stack+0x22/0x50 [ 31.356815] __kasan_record_aux_stack+0x8e/0xa0 [ 31.357424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.358125] remove_vma+0x139/0x170 [ 31.358611] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.359207] do_vmi_munmap+0x1f1/0x2b0 [ 31.359720] __vm_munmap+0x138/0x3a0 [ 31.360218] __x64_sys_munmap+0x59/0x80 [ 31.360749] do_syscall_64+0x3f/0x90 [ 31.361245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361936] [ 31.362180] The buggy address belongs to the object at ffff888019d03d98 [ 31.362180] which belongs to the cache vm_area_struct of size 168 [ 31.363763] The buggy address is located 88 bytes inside of [ 31.363763] freed 168-byte region [ffff888019d03d98, ffff888019d03e40) [ 31.365279] [ 31.365506] The buggy address belongs to the physical page: [ 31.366209] page:00000000a6f812a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d03 [ 31.367377] memcg:ffff888018fcc901 [ 31.367830] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.368582] page_type: 0xffffffff() [ 31.369066] raw: 0100000000000200 ffff8880087a0c80 ffffea0000518e80 dead000000000009 [ 31.370039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fcc901 [ 31.371007] page dumped because: kasan: bad access detected [ 31.371720] [ 31.371951] Memory state around the buggy address: [ 31.372575] ffff888019d03c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.373504] ffff888019d03d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.374440] >ffff888019d03d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.375354] ^ [ 31.376221] ffff888019d03e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.377136] ffff888019d03e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.378064] ================================================================== [ 31.379032] Disabling lock debugging due to kernel taint [ 33.330484] BUG: Bad rss-counter state mm:000000008076d2e6 type:MM_FILEPAGES val:33 [ 33.331459] BUG: Bad rss-counter state mm:000000008076d2e6 type:MM_ANONPAGES val:22 [ 33.806024] BUG: Bad rss-counter state mm:00000000770d9b12 type:MM_FILEPAGES val:33 [ 33.807041] BUG: Bad rss-counter state mm:00000000770d9b12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10189' (ECDSA) to the list of known hosts. 2023/06/21 06:12:29 fuzzer started 2023/06/21 06:12:29 dialing manager at localhost:36067 2023/06/21 06:12:29 checking machine... 2023/06/21 06:12:29 checking revisions... [ 34.529351] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:12:29 testing simple program... [ 34.576304] cgroup: Unknown subsys name 'net' [ 34.609726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:12:29 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015ceb680 RSI=ffffffff83c60be5 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801642f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000d3 R11=0000093700000937 R12=0000000000000000 R13=00000000000000d3 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0880 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 00007f166be99900 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=00007f166c450618 CR3=000000000e898000 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=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 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000003 RCX=0000000080000000 RDX=ffff8880145f1b40 RSI=ffffffff811f7eed RDI=ffff88801a103c80 RBP=ffff88801a103c80 RSP=ffff8880145d7988 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000000 R12=ffff88800fe48000 R13=ffff88800e701b40 R14=ffff8880145d7a70 R15=0000000000000053 RIP=ffffffff814c0871 RFL=00000293 [--S-A-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 00007f4d4e3df900 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=00007f4d4d86c260 CR3=000000000f412000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c132cced1ecdd5ec00000000000ae988 XMM05=2abd58f448f988790000000000132bc0 XMM06=19e9129bd510f2350000000000131a58 XMM07=fb795ef6d65770560000000000121c70 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000