syzkaller login: [ 30.066870] BUG: Bad rss-counter state mm:0000000017f52f2f type:MM_FILEPAGES val:33 [ 30.068205] BUG: Bad rss-counter state mm:0000000017f52f2f type:MM_ANONPAGES val:22 [ 30.222039] ================================================================== [ 30.223187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.224442] Read of size 8 at addr ffff88800eee3880 by task sshd/219 [ 30.225242] [ 30.225458] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.226327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.227321] Call Trace: [ 30.227645] [ 30.227927] dump_stack_lvl+0x91/0xf0 [ 30.228429] print_report+0xcc/0x620 [ 30.228911] ? __virt_addr_valid+0x102/0x340 [ 30.229462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.230083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.230703] kasan_report+0xbe/0xf0 [ 30.231192] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.231813] vma_interval_tree_remove+0xc75/0xec0 [ 30.232426] vma_prepare+0xc54/0x11a0 [ 30.232902] __split_vma+0x5af/0x950 [ 30.233376] ? __pfx___split_vma+0x10/0x10 [ 30.233919] ? find_held_lock+0x2c/0x110 [ 30.234438] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.235023] ? lock_is_held_type+0x9f/0x120 [ 30.235555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.236158] ? mtree_range_walk+0x632/0x900 [ 30.236709] ? mas_walk+0x5c7/0x7c0 [ 30.237181] do_vmi_munmap+0x1f1/0x2b0 [ 30.237682] mmap_region+0x1f9/0x2660 [ 30.238163] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.238670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.239384] ? __pfx_lock_acquire+0x10/0x10 [ 30.239917] ? __pfx_mmap_region+0x10/0x10 [ 30.240442] ? security_mmap_addr+0x7d/0xa0 [ 30.240972] ? get_unmapped_area+0x1f5/0x3f0 [ 30.241515] do_mmap+0x854/0xf00 [ 30.241954] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.242474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.243049] ksys_mmap_pgoff+0x3af/0x500 [ 30.243552] do_syscall_64+0x3f/0x90 [ 30.244035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.244688] RIP: 0033:0x7f97d2566d82 [ 30.245153] 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 [ 30.247265] RSP: 002b:00007ffe15e62fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.248157] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97d2566d82 [ 30.249000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97d19a0000 [ 30.249845] RBP: 00007f97d19a0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.250705] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603a7b66b20 [ 30.251561] R13: 00007ffe15e62fd0 R14: 00007ffe15e63000 R15: 00007ffe15e63360 [ 30.252408] [ 30.252698] [ 30.252916] Allocated by task 212: [ 30.253343] kasan_save_stack+0x22/0x50 [ 30.253850] kasan_set_track+0x25/0x30 [ 30.254345] __kasan_slab_alloc+0x59/0x70 [ 30.254890] kmem_cache_alloc+0x16b/0x370 [ 30.255401] vm_area_dup+0x20/0x160 [ 30.255861] __split_vma+0x170/0x950 [ 30.256329] split_vma+0xc6/0x110 [ 30.256765] mprotect_fixup+0x8d2/0xb30 [ 30.257261] do_mprotect_pkey+0x87e/0xd40 [ 30.257776] __x64_sys_mprotect+0x78/0xc0 [ 30.258325] do_syscall_64+0x3f/0x90 [ 30.258846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.259518] [ 30.259740] Freed by task 212: [ 30.260158] kasan_save_stack+0x22/0x50 [ 30.260681] kasan_set_track+0x25/0x30 [ 30.261199] kasan_save_free_info+0x2b/0x50 [ 30.261756] __kasan_slab_free+0x10a/0x190 [ 30.262311] kmem_cache_free+0x10d/0x4d0 [ 30.262858] rcu_core+0x8c8/0x2860 [ 30.263325] __do_softirq+0x1b7/0x7d4 [ 30.263820] [ 30.264043] Last potentially related work creation: [ 30.264651] kasan_save_stack+0x22/0x50 [ 30.265176] __kasan_record_aux_stack+0x8e/0xa0 [ 30.265772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.266450] remove_vma+0x139/0x170 [ 30.266940] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.267523] do_vmi_munmap+0x1f1/0x2b0 [ 30.268032] __vm_munmap+0x138/0x3a0 [ 30.268519] __x64_sys_munmap+0x59/0x80 [ 30.269043] do_syscall_64+0x3f/0x90 [ 30.269546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.270215] [ 30.270434] The buggy address belongs to the object at ffff88800eee3828 [ 30.270434] which belongs to the cache vm_area_struct of size 168 [ 30.271963] The buggy address is located 88 bytes inside of [ 30.271963] freed 168-byte region [ffff88800eee3828, ffff88800eee38d0) [ 30.273420] [ 30.273645] The buggy address belongs to the physical page: [ 30.274329] page:000000008d6f78fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeee3 [ 30.275465] memcg:ffff888009403e01 [ 30.275904] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.276574] page_type: 0xffffffff() [ 30.277048] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b9dc0 dead000000000008 [ 30.277996] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009403e01 [ 30.278967] page dumped because: kasan: bad access detected [ 30.279627] [ 30.279843] Memory state around the buggy address: [ 30.280421] ffff88800eee3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.281282] ffff88800eee3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.282136] >ffff88800eee3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.282999] ^ [ 30.283408] ffff88800eee3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.284251] ffff88800eee3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.285097] ================================================================== [ 30.286077] Disabling lock debugging due to kernel taint [ 32.364353] BUG: Bad rss-counter state mm:00000000b02d8d8e type:MM_FILEPAGES val:33 [ 32.365547] BUG: Bad rss-counter state mm:00000000b02d8d8e type:MM_ANONPAGES val:22 [ 32.828667] BUG: Bad rss-counter state mm:00000000ca6c8268 type:MM_FILEPAGES val:33 [ 32.829980] BUG: Bad rss-counter state mm:00000000ca6c8268 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4801' (ECDSA) to the list of known hosts. 2023/06/20 14:56:00 fuzzer started 2023/06/20 14:56:01 dialing manager at localhost:36067 2023/06/20 14:56:01 checking machine... 2023/06/20 14:56:01 checking revisions... [ 33.451136] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:56:01 testing simple program... [ 33.499199] cgroup: Unknown subsys name 'net' [ 33.548699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:56:00 Registers: info registers vcpu 0 RAX=1ffffffff0c0af21 RBX=ffffffff8605790c RCX=ffffffff86607dd3 RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff86056148 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff860590d4 R13=ffffffff85d7a9c4 R14=ffffffff86056144 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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=00007ffe357ff7f8 CR3=0000000005482000 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=00007f2b7e9095100000555bb8232790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff844f8522 RDX=ffff888010379b40 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88801035f928 RSP=ffff88801035f8b8 R8 =0000000000000007 R9 =0000000000001000 R10=ffff8880088c4dc2 R11=00000000000b6d53 R12=ffff8880088c4dc2 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0860 RFL=00000082 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb7ba80e900 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=00007fb7b9c96270 CR3=000000000f018000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a4434b2634bb607b00000000000ae988 XMM05=b1e91b25aa166cfc0000000000133bb0 XMM06=806171799158d96700000000001329a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000