syzkaller login: [ 43.957225] BUG: Bad rss-counter state mm:00000000fa3b45c3 type:MM_FILEPAGES val:33 [ 43.958831] BUG: Bad rss-counter state mm:00000000fa3b45c3 type:MM_ANONPAGES val:22 [ 44.130052] ================================================================== [ 44.131147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.132274] Read of size 8 at addr ffff888010035798 by task sshd/218 [ 44.133104] [ 44.133336] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.134250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.135305] Call Trace: [ 44.135648] [ 44.135948] dump_stack_lvl+0x91/0xf0 [ 44.136465] print_report+0xcc/0x620 [ 44.136984] ? __virt_addr_valid+0x102/0x340 [ 44.137569] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.138219] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.138875] kasan_report+0xbe/0xf0 [ 44.139391] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.140059] vma_interval_tree_remove+0xc75/0xec0 [ 44.140718] vma_prepare+0xc54/0x11a0 [ 44.141251] __split_vma+0x5af/0x950 [ 44.141775] ? __pfx___split_vma+0x10/0x10 [ 44.142380] ? find_held_lock+0x2c/0x110 [ 44.142949] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.143590] ? lock_is_held_type+0x9f/0x120 [ 44.144182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.144850] ? mtree_range_walk+0x632/0x900 [ 44.145463] ? mas_walk+0x5c7/0x7c0 [ 44.145981] do_vmi_munmap+0x1f1/0x2b0 [ 44.146523] mmap_region+0x1f9/0x2660 [ 44.147064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.147632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.148428] ? __pfx_lock_acquire+0x10/0x10 [ 44.149014] ? __pfx_mmap_region+0x10/0x10 [ 44.149595] ? security_mmap_addr+0x7d/0xa0 [ 44.150194] ? get_unmapped_area+0x1f5/0x3f0 [ 44.150792] do_mmap+0x854/0xf00 [ 44.151282] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.151829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.152444] ksys_mmap_pgoff+0x3af/0x500 [ 44.153000] do_syscall_64+0x3f/0x90 [ 44.153527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.154236] RIP: 0033:0x7f6baec76d82 [ 44.154744] 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 [ 44.157140] RSP: 002b:00007ffe66a08f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.158148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6baec76d82 [ 44.159095] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bae0b0000 [ 44.160035] RBP: 00007f6bae0b0000 R08: 0000000000000009 R09: 0000000000001000 [ 44.160974] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0f7597ec0 [ 44.161920] R13: 00007ffe66a08f90 R14: 00007ffe66a08fc0 R15: 00007ffe66a09320 [ 44.162864] [ 44.163218] [ 44.163454] Allocated by task 211: [ 44.163933] kasan_save_stack+0x22/0x50 [ 44.164483] kasan_set_track+0x25/0x30 [ 44.165015] __kasan_slab_alloc+0x59/0x70 [ 44.165576] kmem_cache_alloc+0x16b/0x370 [ 44.166133] vm_area_dup+0x20/0x160 [ 44.166622] __split_vma+0x170/0x950 [ 44.167145] split_vma+0xc6/0x110 [ 44.167623] mprotect_fixup+0x8d2/0xb30 [ 44.168169] do_mprotect_pkey+0x87e/0xd40 [ 44.168733] __x64_sys_mprotect+0x78/0xc0 [ 44.169288] do_syscall_64+0x3f/0x90 [ 44.169801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.170487] [ 44.170719] Freed by task 211: [ 44.171144] kasan_save_stack+0x22/0x50 [ 44.171690] kasan_set_track+0x25/0x30 [ 44.172222] kasan_save_free_info+0x2b/0x50 [ 44.172792] __kasan_slab_free+0x10a/0x190 [ 44.173374] kmem_cache_free+0x10d/0x4d0 [ 44.173925] rcu_core+0x8c8/0x2860 [ 44.174408] __do_softirq+0x1b7/0x7d4 [ 44.174926] [ 44.175180] Last potentially related work creation: [ 44.175822] kasan_save_stack+0x22/0x50 [ 44.176378] __kasan_record_aux_stack+0x8e/0xa0 [ 44.177004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.177705] remove_vma+0x139/0x170 [ 44.178197] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.178805] do_vmi_munmap+0x1f1/0x2b0 [ 44.179348] __vm_munmap+0x138/0x3a0 [ 44.179860] __x64_sys_munmap+0x59/0x80 [ 44.180400] do_syscall_64+0x3f/0x90 [ 44.180914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.181611] [ 44.181846] Second to last potentially related work creation: [ 44.182593] kasan_save_stack+0x22/0x50 [ 44.183155] __kasan_record_aux_stack+0x8e/0xa0 [ 44.183782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.184489] remove_vma+0x139/0x170 [ 44.184980] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.185585] do_vmi_munmap+0x1f1/0x2b0 [ 44.186116] mmap_region+0x1f9/0x2660 [ 44.186647] do_mmap+0x854/0xf00 [ 44.187122] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.187653] ksys_mmap_pgoff+0x3af/0x500 [ 44.188198] do_syscall_64+0x3f/0x90 [ 44.188712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.189409] [ 44.189646] The buggy address belongs to the object at ffff888010035740 [ 44.189646] which belongs to the cache vm_area_struct of size 168 [ 44.191260] The buggy address is located 88 bytes inside of [ 44.191260] freed 168-byte region [ffff888010035740, ffff8880100357e8) [ 44.192737] [ 44.192965] The buggy address belongs to the physical page: [ 44.193667] page:00000000ced38d65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10035 [ 44.194818] memcg:ffff888006897e01 [ 44.195279] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.195957] page_type: 0xffffffff() [ 44.196437] raw: 0100000000000200 ffff88800879fc80 ffffea0000365080 dead000000000004 [ 44.197413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006897e01 [ 44.198363] page dumped because: kasan: bad access detected [ 44.199072] [ 44.199306] Memory state around the buggy address: [ 44.199936] ffff888010035680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.200868] ffff888010035700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.201806] >ffff888010035780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.202739] ^ [ 44.203302] ffff888010035800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 44.204237] ffff888010035880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 44.205165] ================================================================== [ 44.206341] Disabling lock debugging due to kernel taint [ 46.068074] BUG: Bad rss-counter state mm:00000000eda27ad5 type:MM_FILEPAGES val:33 [ 46.068809] BUG: Bad rss-counter state mm:00000000eda27ad5 type:MM_ANONPAGES val:22 [ 46.554791] BUG: Bad rss-counter state mm:0000000028bd618e type:MM_FILEPAGES val:33 [ 46.556051] BUG: Bad rss-counter state mm:0000000028bd618e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48822' (ECDSA) to the list of known hosts. 2023/06/19 16:21:13 fuzzer started 2023/06/19 16:21:13 dialing manager at localhost:44161 2023/06/19 16:21:13 checking machine... 2023/06/19 16:21:13 checking revisions... [ 47.288302] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:21:13 testing simple program... [ 47.335628] cgroup: Unknown subsys name 'net' [ 47.395423] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:21:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff860d68fa R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=0000000000000005 R15=ffff888008d7f978 RIP=ffffffff81130b39 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=00007fc3a5bfbd50 CR3=000000000daf0000 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=2033313a31323a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a31323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=ffff88800efa51c0 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800ffef420 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f5709057366 R13=0000000000000000 R14=ffff88800efa51c0 R15=0000000000000cc0 RIP=ffffffff814c081b 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 00007f5708b64900 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=00007ffe7c05e000 CR3=000000000f2a2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000