syzkaller login: [ 31.907595] BUG: Bad rss-counter state mm:0000000043236c34 type:MM_FILEPAGES val:33 [ 31.908753] BUG: Bad rss-counter state mm:0000000043236c34 type:MM_ANONPAGES val:22 [ 32.087686] ================================================================== [ 32.088598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.089596] Read of size 8 at addr ffff88800da9d4e0 by task sshd/223 [ 32.090502] [ 32.090726] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.091600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.092644] Call Trace: [ 32.092973] [ 32.093301] dump_stack_lvl+0x91/0xf0 [ 32.093804] print_report+0xcc/0x620 [ 32.094321] ? __virt_addr_valid+0x102/0x340 [ 32.094884] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.095507] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.096144] kasan_report+0xbe/0xf0 [ 32.096633] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.097301] vma_interval_tree_remove+0xc75/0xec0 [ 32.097922] vma_prepare+0xc54/0x11a0 [ 32.098425] __split_vma+0x5af/0x950 [ 32.098901] ? __pfx___split_vma+0x10/0x10 [ 32.099445] ? find_held_lock+0x2c/0x110 [ 32.099979] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.100554] ? lock_is_held_type+0x9f/0x120 [ 32.101154] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.101785] ? mtree_range_walk+0x632/0x900 [ 32.102366] ? mas_walk+0x5c7/0x7c0 [ 32.102855] do_vmi_munmap+0x1f1/0x2b0 [ 32.103349] mmap_region+0x1f9/0x2660 [ 32.103847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.104370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.105141] ? __pfx_lock_acquire+0x10/0x10 [ 32.105698] ? __pfx_mmap_region+0x10/0x10 [ 32.106260] ? security_mmap_addr+0x7d/0xa0 [ 32.106809] ? get_unmapped_area+0x1f5/0x3f0 [ 32.107361] do_mmap+0x854/0xf00 [ 32.107803] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.108299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.108876] ksys_mmap_pgoff+0x3af/0x500 [ 32.109430] do_syscall_64+0x3f/0x90 [ 32.109923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.110598] RIP: 0033:0x7fd0a4754d82 [ 32.111057] 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 [ 32.113240] RSP: 002b:00007fff768c97f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.114200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0a4754d82 [ 32.115054] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0a3b8e000 [ 32.115902] RBP: 00007fd0a3b8e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.116754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055658bee5b20 [ 32.117638] R13: 00007fff768c9810 R14: 00007fff768c9840 R15: 00007fff768c9ba0 [ 32.118532] [ 32.118829] [ 32.119047] Allocated by task 214: [ 32.119488] kasan_save_stack+0x22/0x50 [ 32.120005] kasan_set_track+0x25/0x30 [ 32.120500] __kasan_slab_alloc+0x59/0x70 [ 32.121066] kmem_cache_alloc+0x16b/0x370 [ 32.121620] vm_area_dup+0x20/0x160 [ 32.122096] __split_vma+0x170/0x950 [ 32.122575] split_vma+0xc6/0x110 [ 32.123031] mprotect_fixup+0x8d2/0xb30 [ 32.123545] do_mprotect_pkey+0x87e/0xd40 [ 32.124078] __x64_sys_mprotect+0x78/0xc0 [ 32.124610] do_syscall_64+0x3f/0x90 [ 32.125135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.125806] [ 32.126042] Freed by task 204: [ 32.126445] kasan_save_stack+0x22/0x50 [ 32.126966] kasan_set_track+0x25/0x30 [ 32.127475] kasan_save_free_info+0x2b/0x50 [ 32.128024] __kasan_slab_free+0x10a/0x190 [ 32.128577] kmem_cache_free+0x10d/0x4d0 [ 32.129132] rcu_core+0x8c8/0x2860 [ 32.129590] __do_softirq+0x1b7/0x7d4 [ 32.130106] [ 32.130326] Last potentially related work creation: [ 32.130922] kasan_save_stack+0x22/0x50 [ 32.131440] __kasan_record_aux_stack+0x8e/0xa0 [ 32.132030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.132687] remove_vma+0x139/0x170 [ 32.133189] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.133763] do_vmi_munmap+0x1f1/0x2b0 [ 32.134281] __vm_munmap+0x138/0x3a0 [ 32.134751] __x64_sys_munmap+0x59/0x80 [ 32.135251] do_syscall_64+0x3f/0x90 [ 32.135737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.136397] [ 32.136613] The buggy address belongs to the object at ffff88800da9d488 [ 32.136613] which belongs to the cache vm_area_struct of size 168 [ 32.138160] The buggy address is located 88 bytes inside of [ 32.138160] freed 168-byte region [ffff88800da9d488, ffff88800da9d530) [ 32.139581] [ 32.139802] The buggy address belongs to the physical page: [ 32.140476] page:0000000085e04700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda9d [ 32.141618] memcg:ffff88800ed99a01 [ 32.142092] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.142753] page_type: 0xffffffff() [ 32.143217] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.144154] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed99a01 [ 32.145105] page dumped because: kasan: bad access detected [ 32.145783] [ 32.146015] Memory state around the buggy address: [ 32.146597] ffff88800da9d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.147474] ffff88800da9d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.148338] >ffff88800da9d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.149235] ^ [ 32.150031] ffff88800da9d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.150889] ffff88800da9d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.151742] ================================================================== [ 32.152736] Disabling lock debugging due to kernel taint [ 34.163370] BUG: Bad rss-counter state mm:0000000056857d0b type:MM_FILEPAGES val:33 [ 34.164564] BUG: Bad rss-counter state mm:0000000056857d0b type:MM_ANONPAGES val:22 [ 34.544075] BUG: Bad rss-counter state mm:00000000e59ebe52 type:MM_FILEPAGES val:33 [ 34.545098] BUG: Bad rss-counter state mm:00000000e59ebe52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7621' (ECDSA) to the list of known hosts. 2023/06/20 23:50:25 fuzzer started 2023/06/20 23:50:26 dialing manager at localhost:36067 2023/06/20 23:50:26 checking machine... 2023/06/20 23:50:26 checking revisions... [ 35.292209] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:50:26 testing simple program... [ 35.337161] cgroup: Unknown subsys name 'net' [ 35.383607] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:50:25 Registers: info registers vcpu 0 RAX=ffffffff81893cb2 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b95ea4 RSI=ffffffff81893cb2 RDI=ffff888015caf590 RBP=ffff888015caf560 RSP=ffff888015caf4c0 R8 =0000000000000001 R9 =ffff888015caf508 R10=0000000000038001 R11=0000000000020c51 R12=ffff888015caf590 R13=0000000000000000 R14=ffff8880145dd1c0 R15=0000000000000cc0 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007f9ae7441900 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=00007f9ae6849a50 CR3=000000000c5f2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d9501c43b45e2d3e00000000000ae988 XMM05=7f73ab95d4eed4ca0000000000132c20 XMM06=c291bd5c70af25b90000000000131cc0 XMM07=fb795ef6d65770560000000000121f58 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=ffffffff814c84a1 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880167f77f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007efd20b8a477 R13=0000000000000000 R14=ffff88800dabb680 R15=0000000000092cc0 RIP=ffffffff814c0408 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 00007efd20697900 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=00007efd20c4e618 CR3=0000000013a68000 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=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