syzkaller login: [ 31.106342] BUG: Bad rss-counter state mm:000000001588b27e type:MM_FILEPAGES val:33 [ 31.107600] BUG: Bad rss-counter state mm:000000001588b27e type:MM_ANONPAGES val:22 [ 31.149727] ================================================================== [ 31.151136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.152577] Read of size 8 at addr ffff8880090825c8 by task sshd/221 [ 31.153677] [ 31.154036] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.155231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.156668] Call Trace: [ 31.157079] [ 31.157451] dump_stack_lvl+0x91/0xf0 [ 31.158095] print_report+0xcc/0x620 [ 31.158723] ? __virt_addr_valid+0x102/0x340 [ 31.159437] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160243] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160915] kasan_report+0xbe/0xf0 [ 31.161432] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162110] vma_interval_tree_remove+0xc75/0xec0 [ 31.162773] vma_prepare+0xc54/0x11a0 [ 31.163293] __split_vma+0x5af/0x950 [ 31.163850] ? __pfx___split_vma+0x10/0x10 [ 31.164434] ? find_held_lock+0x2c/0x110 [ 31.165018] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.165650] ? lock_is_held_type+0x9f/0x120 [ 31.166237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.166894] ? mtree_range_walk+0x632/0x900 [ 31.167494] ? mas_walk+0x5c7/0x7c0 [ 31.168056] do_vmi_munmap+0x1f1/0x2b0 [ 31.168591] mmap_region+0x1f9/0x2660 [ 31.169108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.169668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.170428] ? __pfx_lock_acquire+0x10/0x10 [ 31.171006] ? __pfx_mmap_region+0x10/0x10 [ 31.171592] ? security_mmap_addr+0x7d/0xa0 [ 31.172179] ? get_unmapped_area+0x1f5/0x3f0 [ 31.172775] do_mmap+0x854/0xf00 [ 31.173249] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.173783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.174389] ksys_mmap_pgoff+0x3af/0x500 [ 31.174937] do_syscall_64+0x3f/0x90 [ 31.175455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176202] RIP: 0033:0x7f8e90605d82 [ 31.176718] 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 [ 31.179125] RSP: 002b:00007ffc309c7258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.180186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e90605d82 [ 31.181139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e8fa3f000 [ 31.182085] RBP: 00007f8e8fa3f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.183035] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f3642cec0 [ 31.184015] R13: 00007ffc309c7270 R14: 00007ffc309c72a0 R15: 00007ffc309c7600 [ 31.184982] [ 31.185308] [ 31.185549] Allocated by task 214: [ 31.186033] kasan_save_stack+0x22/0x50 [ 31.186599] kasan_set_track+0x25/0x30 [ 31.187152] __kasan_slab_alloc+0x59/0x70 [ 31.187777] kmem_cache_alloc+0x16b/0x370 [ 31.188356] vm_area_dup+0x20/0x160 [ 31.188863] __split_vma+0x170/0x950 [ 31.189379] split_vma+0xc6/0x110 [ 31.189871] mprotect_fixup+0x8d2/0xb30 [ 31.190431] do_mprotect_pkey+0x87e/0xd40 [ 31.191014] __x64_sys_mprotect+0x78/0xc0 [ 31.191621] do_syscall_64+0x3f/0x90 [ 31.192158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192881] [ 31.193220] Freed by task 214: [ 31.193655] kasan_save_stack+0x22/0x50 [ 31.194217] kasan_set_track+0x25/0x30 [ 31.194765] kasan_save_free_info+0x2b/0x50 [ 31.195369] __kasan_slab_free+0x10a/0x190 [ 31.196003] kmem_cache_free+0x10d/0x4d0 [ 31.196571] rcu_core+0x8c8/0x2860 [ 31.197066] __do_softirq+0x1b7/0x7d4 [ 31.197602] [ 31.197843] Last potentially related work creation: [ 31.198499] kasan_save_stack+0x22/0x50 [ 31.199055] __kasan_record_aux_stack+0x8e/0xa0 [ 31.199718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.200435] remove_vma+0x139/0x170 [ 31.200932] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.201546] do_vmi_munmap+0x1f1/0x2b0 [ 31.202092] __vm_munmap+0x138/0x3a0 [ 31.202613] __x64_sys_munmap+0x59/0x80 [ 31.203165] do_syscall_64+0x3f/0x90 [ 31.203717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.204440] [ 31.204680] The buggy address belongs to the object at ffff888009082570 [ 31.204680] which belongs to the cache vm_area_struct of size 168 [ 31.206324] The buggy address is located 88 bytes inside of [ 31.206324] freed 168-byte region [ffff888009082570, ffff888009082618) [ 31.207922] [ 31.208159] The buggy address belongs to the physical page: [ 31.208884] page:00000000b718c528 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9082 [ 31.210101] memcg:ffff888009450601 [ 31.210576] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.211287] page_type: 0xffffffff() [ 31.211808] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.212821] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009450601 [ 31.213831] page dumped because: kasan: bad access detected [ 31.214579] [ 31.214807] Memory state around the buggy address: [ 31.215414] ffff888009082480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.216419] ffff888009082500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.217368] >ffff888009082580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.218310] ^ [ 31.219047] ffff888009082600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.220018] ffff888009082680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.220957] ================================================================== [ 31.222005] Disabling lock debugging due to kernel taint [ 33.245918] BUG: Bad rss-counter state mm:00000000b886a6f3 type:MM_FILEPAGES val:33 [ 33.247102] BUG: Bad rss-counter state mm:00000000b886a6f3 type:MM_ANONPAGES val:22 [ 33.739325] BUG: Bad rss-counter state mm:00000000c9e4c557 type:MM_FILEPAGES val:33 [ 33.741169] BUG: Bad rss-counter state mm:00000000c9e4c557 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8315' (ECDSA) to the list of known hosts. 2023/06/20 15:30:05 fuzzer started 2023/06/20 15:30:05 dialing manager at localhost:36067 2023/06/20 15:30:06 checking machine... 2023/06/20 15:30:06 checking revisions... [ 34.538027] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:30:06 testing simple program... [ 34.581680] cgroup: Unknown subsys name 'net' [ 34.620482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:30:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffc840f8db0 RCX=0000000000000000 RDX=ffff88800d88b680 RSI=ffffffff82157d23 RDI=00007ffc840f8e54 RBP=ffff88800e517e78 RSP=ffff88800e517780 R8 =0001000800000002 R9 =000200080f02000a R10=000400080f02000a R11=00030009ff02000a R12=0000000000000000 R13=0000000000000000 R14=00000000000000a4 R15=ffff88800e517e70 RIP=ffffffff82157d2d 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 00007f936eaff900 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=00007f936f0b6618 CR3=000000000d890000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f60dc322760 CR3=000000000e214000 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=2035303a30333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30333a3531203032 XMM08=79732f646d65747379732f62696c2f22 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000