syzkaller login: [ 40.046089] BUG: Bad rss-counter state mm:00000000523b5ca8 type:MM_FILEPAGES val:33 [ 40.047251] BUG: Bad rss-counter state mm:00000000523b5ca8 type:MM_ANONPAGES val:22 [ 40.193832] ================================================================== [ 40.194931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.196062] Read of size 8 at addr ffff88800f6776b0 by task sshd/225 [ 40.197143] [ 40.197411] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.198439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.199621] Call Trace: [ 40.200009] [ 40.200354] dump_stack_lvl+0x91/0xf0 [ 40.200938] print_report+0xcc/0x620 [ 40.201524] ? __virt_addr_valid+0x102/0x340 [ 40.202184] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.202919] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.203696] kasan_report+0xbe/0xf0 [ 40.204281] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.204901] vma_interval_tree_remove+0xc75/0xec0 [ 40.205519] vma_prepare+0xc54/0x11a0 [ 40.205999] __split_vma+0x5af/0x950 [ 40.206472] ? __pfx___split_vma+0x10/0x10 [ 40.206998] ? find_held_lock+0x2c/0x110 [ 40.207517] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.208100] ? lock_is_held_type+0x9f/0x120 [ 40.208635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.209243] ? mtree_range_walk+0x632/0x900 [ 40.209795] ? mas_walk+0x5c7/0x7c0 [ 40.210268] do_vmi_munmap+0x1f1/0x2b0 [ 40.210763] mmap_region+0x1f9/0x2660 [ 40.211245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.211764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.212476] ? __pfx_lock_acquire+0x10/0x10 [ 40.213010] ? __pfx_mmap_region+0x10/0x10 [ 40.213538] ? security_mmap_addr+0x7d/0xa0 [ 40.214067] ? get_unmapped_area+0x1f5/0x3f0 [ 40.214616] do_mmap+0x854/0xf00 [ 40.215056] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.215549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.216130] ksys_mmap_pgoff+0x3af/0x500 [ 40.216639] do_syscall_64+0x3f/0x90 [ 40.217117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.217769] RIP: 0033:0x7f5759b73d82 [ 40.218225] 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 [ 40.220340] RSP: 002b:00007ffdac5528e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.221240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5759b73d82 [ 40.222088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5758fad000 [ 40.222926] RBP: 00007f5758fad000 R08: 0000000000000009 R09: 0000000000001000 [ 40.223787] R10: 0000000000000812 R11: 0000000000000206 R12: 000055865fdca980 [ 40.224631] R13: 00007ffdac552900 R14: 00007ffdac552930 R15: 00007ffdac552c90 [ 40.225485] [ 40.225777] [ 40.225994] Allocated by task 218: [ 40.226425] kasan_save_stack+0x22/0x50 [ 40.226928] kasan_set_track+0x25/0x30 [ 40.227418] __kasan_slab_alloc+0x59/0x70 [ 40.227955] kmem_cache_alloc+0x16b/0x370 [ 40.228467] vm_area_dup+0x20/0x160 [ 40.228918] __split_vma+0x170/0x950 [ 40.229390] split_vma+0xc6/0x110 [ 40.229830] mprotect_fixup+0x8d2/0xb30 [ 40.230329] do_mprotect_pkey+0x87e/0xd40 [ 40.230852] __x64_sys_mprotect+0x78/0xc0 [ 40.231372] do_syscall_64+0x3f/0x90 [ 40.231854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.232501] [ 40.232718] Freed by task 218: [ 40.233111] kasan_save_stack+0x22/0x50 [ 40.233615] kasan_set_track+0x25/0x30 [ 40.234113] kasan_save_free_info+0x2b/0x50 [ 40.234646] __kasan_slab_free+0x10a/0x190 [ 40.235179] kmem_cache_free+0x10d/0x4d0 [ 40.235709] rcu_core+0x8c8/0x2860 [ 40.236154] __do_softirq+0x1b7/0x7d4 [ 40.236636] [ 40.236851] Last potentially related work creation: [ 40.237461] kasan_save_stack+0x22/0x50 [ 40.238028] __kasan_record_aux_stack+0x8e/0xa0 [ 40.238610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.239246] remove_vma+0x139/0x170 [ 40.239714] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.240276] do_vmi_munmap+0x1f1/0x2b0 [ 40.240762] __vm_munmap+0x138/0x3a0 [ 40.241230] __x64_sys_munmap+0x59/0x80 [ 40.241718] do_syscall_64+0x3f/0x90 [ 40.242197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.242840] [ 40.243053] The buggy address belongs to the object at ffff88800f677658 [ 40.243053] which belongs to the cache vm_area_struct of size 168 [ 40.244517] The buggy address is located 88 bytes inside of [ 40.244517] freed 168-byte region [ffff88800f677658, ffff88800f677700) [ 40.245917] [ 40.246129] The buggy address belongs to the physical page: [ 40.246790] page:000000003743fa7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf677 [ 40.247893] memcg:ffff8880098b2101 [ 40.248318] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.248963] page_type: 0xffffffff() [ 40.249419] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.250337] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098b2101 [ 40.251234] page dumped because: kasan: bad access detected [ 40.251897] [ 40.252110] Memory state around the buggy address: [ 40.252692] ffff88800f677580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.253540] ffff88800f677600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.254397] >ffff88800f677680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.255244] ^ [ 40.255843] ffff88800f677700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.256696] ffff88800f677780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.257549] ================================================================== [ 40.258471] Disabling lock debugging due to kernel taint [ 42.328703] BUG: Bad rss-counter state mm:000000002b77ec9a type:MM_FILEPAGES val:33 [ 42.329686] BUG: Bad rss-counter state mm:000000002b77ec9a type:MM_ANONPAGES val:22 [ 42.812076] BUG: Bad rss-counter state mm:000000003d515b99 type:MM_FILEPAGES val:33 [ 42.813178] BUG: Bad rss-counter state mm:000000003d515b99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58409' (ECDSA) to the list of known hosts. 2023/06/19 20:27:24 fuzzer started 2023/06/19 20:27:24 dialing manager at localhost:44161 2023/06/19 20:27:24 checking machine... 2023/06/19 20:27:24 checking revisions... [ 43.497527] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:27:24 testing simple program... [ 43.552415] cgroup: Unknown subsys name 'net' [ 43.595204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:27:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001f2f401 RSI=ffffffff83c5ed43 RDI=ffff8880167ef730 RBP=ffff88800f97a000 RSP=ffff8880167ef588 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=0000097500000975 R12=0000000000000001 R13=0000000000000000 R14=ffff8880167ef728 R15=ffff888016bf8c80 RIP=ffffffff83c5ed97 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 00007f85a0f70900 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=00007f85a1527618 CR3=0000000015f7c000 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=0000000000000000 RBX=ffff888018fd7548 RCX=0000000000000001 RDX=1ffff110031faea9 RSI=ffff888018fd7f50 RDI=ffff888018fd7548 RBP=ffff888018fd7f50 RSP=ffff888018fd74a0 R8 =ffffffff864b024a R9 =ffff888018fd7588 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff888018fd7590 R14=ffff888018fd7f58 R15=ffff888018fd7548 RIP=ffffffff81130428 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 00007fb263e4e700 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=00007fc311a7b9f0 CR3=000000000dbc4000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3433325b646873732033323a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383433 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000