syzkaller login: [ 31.022646] BUG: Bad rss-counter state mm:0000000010f9646d type:MM_FILEPAGES val:33 [ 31.024805] BUG: Bad rss-counter state mm:0000000010f9646d type:MM_ANONPAGES val:22 [ 31.191804] ================================================================== [ 31.192947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.194152] Read of size 8 at addr ffff888018d64968 by task sshd/219 [ 31.195234] [ 31.195511] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.196637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.197879] Call Trace: [ 31.198274] [ 31.198636] dump_stack_lvl+0x91/0xf0 [ 31.199254] print_report+0xcc/0x620 [ 31.199858] ? __virt_addr_valid+0x102/0x340 [ 31.200550] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201333] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202144] kasan_report+0xbe/0xf0 [ 31.202738] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203523] vma_interval_tree_remove+0xc75/0xec0 [ 31.204283] vma_prepare+0xc54/0x11a0 [ 31.204887] __split_vma+0x5af/0x950 [ 31.205491] ? __pfx___split_vma+0x10/0x10 [ 31.206190] ? find_held_lock+0x2c/0x110 [ 31.206854] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.207573] ? lock_is_held_type+0x9f/0x120 [ 31.208254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.209023] ? mtree_range_walk+0x632/0x900 [ 31.209731] ? mas_walk+0x5c7/0x7c0 [ 31.210345] do_vmi_munmap+0x1f1/0x2b0 [ 31.210986] mmap_region+0x1f9/0x2660 [ 31.211603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.212258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.213155] ? __pfx_lock_acquire+0x10/0x10 [ 31.213833] ? __pfx_mmap_region+0x10/0x10 [ 31.214531] ? security_mmap_addr+0x7d/0xa0 [ 31.215200] ? get_unmapped_area+0x1f5/0x3f0 [ 31.215889] do_mmap+0x854/0xf00 [ 31.216445] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.217789] ksys_mmap_pgoff+0x3af/0x500 [ 31.218456] do_syscall_64+0x3f/0x90 [ 31.219054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219896] RIP: 0033:0x7f793ff59d82 [ 31.220483] 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 [ 31.223262] RSP: 002b:00007ffe4423a3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.224440] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f793ff59d82 [ 31.225542] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f793f393000 [ 31.226664] RBP: 00007f793f393000 R08: 0000000000000009 R09: 0000000000001000 [ 31.227760] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a7007dec0 [ 31.228856] R13: 00007ffe4423a400 R14: 00007ffe4423a430 R15: 00007ffe4423a790 [ 31.229974] [ 31.230345] [ 31.230623] Allocated by task 212: [ 31.231162] kasan_save_stack+0x22/0x50 [ 31.231790] kasan_set_track+0x25/0x30 [ 31.232330] __kasan_slab_alloc+0x59/0x70 [ 31.232907] kmem_cache_alloc+0x16b/0x370 [ 31.233463] vm_area_dup+0x20/0x160 [ 31.233985] __split_vma+0x170/0x950 [ 31.234499] split_vma+0xc6/0x110 [ 31.234979] mprotect_fixup+0x8d2/0xb30 [ 31.235531] do_mprotect_pkey+0x87e/0xd40 [ 31.236189] __x64_sys_mprotect+0x78/0xc0 [ 31.236756] do_syscall_64+0x3f/0x90 [ 31.237270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237994] [ 31.238230] Freed by task 212: [ 31.238664] kasan_save_stack+0x22/0x50 [ 31.239216] kasan_set_track+0x25/0x30 [ 31.239759] kasan_save_free_info+0x2b/0x50 [ 31.240341] __kasan_slab_free+0x10a/0x190 [ 31.240926] kmem_cache_free+0x10d/0x4d0 [ 31.241485] rcu_core+0x8c8/0x2860 [ 31.241987] __do_softirq+0x1b7/0x7d4 [ 31.242515] [ 31.242752] Last potentially related work creation: [ 31.243383] kasan_save_stack+0x22/0x50 [ 31.243935] __kasan_record_aux_stack+0x8e/0xa0 [ 31.244563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.245277] remove_vma+0x139/0x170 [ 31.245777] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.246419] do_vmi_munmap+0x1f1/0x2b0 [ 31.246954] __vm_munmap+0x138/0x3a0 [ 31.247471] __x64_sys_munmap+0x59/0x80 [ 31.248012] do_syscall_64+0x3f/0x90 [ 31.248539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249245] [ 31.249482] The buggy address belongs to the object at ffff888018d64910 [ 31.249482] which belongs to the cache vm_area_struct of size 168 [ 31.251111] The buggy address is located 88 bytes inside of [ 31.251111] freed 168-byte region [ffff888018d64910, ffff888018d649b8) [ 31.252664] [ 31.252895] The buggy address belongs to the physical page: [ 31.253622] page:00000000fbfa7589 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d64 [ 31.254845] memcg:ffff88800f0b6501 [ 31.255318] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.256032] page_type: 0xffffffff() [ 31.256533] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.257561] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0b6501 [ 31.258592] page dumped because: kasan: bad access detected [ 31.259330] [ 31.259563] Memory state around the buggy address: [ 31.260166] ffff888018d64800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.261123] ffff888018d64880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.262084] >ffff888018d64900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.263057] ^ [ 31.263923] ffff888018d64980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.264887] ffff888018d64a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.265865] ================================================================== [ 31.266924] Disabling lock debugging due to kernel taint [ 33.468049] BUG: Bad rss-counter state mm:00000000a6a6c272 type:MM_FILEPAGES val:33 [ 33.469036] BUG: Bad rss-counter state mm:00000000a6a6c272 type:MM_ANONPAGES val:22 [ 33.830686] BUG: Bad rss-counter state mm:00000000e0c25911 type:MM_FILEPAGES val:33 [ 33.831864] BUG: Bad rss-counter state mm:00000000e0c25911 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21857' (ECDSA) to the list of known hosts. 2023/06/20 13:06:11 fuzzer started 2023/06/20 13:06:11 dialing manager at localhost:36067 2023/06/20 13:06:11 checking machine... 2023/06/20 13:06:11 checking revisions... [ 34.536792] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:06:11 testing simple program... [ 34.591340] cgroup: Unknown subsys name 'net' [ 34.653141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:06:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff888016fdff48 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880147d51c0 R15=ffff88800f5751b0 RIP=ffffffff8113038e 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 00007fa370b3d900 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=00007fa3710f4618 CR3=000000000caae000 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=563412feff00545000000000000080fe 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=0000000000000001 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=00007fd895f0ed90 CR3=00000000145a0000 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=1550053e9500e5ab2d4169d88382ea25 XMM02=ec2efd57dc4c00df000000000011d220 XMM03=caa8fb8d7b6bef12000000000011d2f0 XMM04=366a80f6a6016ddd00000000000ae988 XMM05=6270673c424f86b90000000000132200 XMM06=4fda316b135da52b0000000000131628 XMM07=e042d86d42eb936e0000000000121bd8 XMM08=caa8fb8d7b6bef12000000000011d2f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000