syzkaller login: [ 35.088794] BUG: Bad rss-counter state mm:00000000c1f995a6 type:MM_FILEPAGES val:33 [ 35.089550] BUG: Bad rss-counter state mm:00000000c1f995a6 type:MM_ANONPAGES val:22 [ 35.117320] ================================================================== [ 35.118053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.118753] Read of size 8 at addr ffff888015e98228 by task sshd/220 [ 35.119321] [ 35.119479] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.120086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.120784] Call Trace: [ 35.121017] [ 35.121434] dump_stack_lvl+0x91/0xf0 [ 35.121820] print_report+0xcc/0x620 [ 35.122179] ? __virt_addr_valid+0x102/0x340 [ 35.122575] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.123014] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.123463] kasan_report+0xbe/0xf0 [ 35.123787] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.124218] vma_interval_tree_remove+0xc75/0xec0 [ 35.124649] vma_prepare+0xc54/0x11a0 [ 35.124994] __split_vma+0x5af/0x950 [ 35.125338] ? __pfx___split_vma+0x10/0x10 [ 35.125724] ? find_held_lock+0x2c/0x110 [ 35.126146] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.126543] ? lock_is_held_type+0x9f/0x120 [ 35.126944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.127392] ? mtree_range_walk+0x632/0x900 [ 35.127791] ? mas_walk+0x5c7/0x7c0 [ 35.128128] do_vmi_munmap+0x1f1/0x2b0 [ 35.128481] mmap_region+0x1f9/0x2660 [ 35.128843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.129221] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.129773] ? __pfx_lock_acquire+0x10/0x10 [ 35.130157] ? __pfx_mmap_region+0x10/0x10 [ 35.130529] ? security_mmap_addr+0x7d/0xa0 [ 35.130924] ? get_unmapped_area+0x1f5/0x3f0 [ 35.131327] do_mmap+0x854/0xf00 [ 35.131647] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.132002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.132413] ksys_mmap_pgoff+0x3af/0x500 [ 35.132778] do_syscall_64+0x3f/0x90 [ 35.133125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.133588] RIP: 0033:0x7f1d26ba8d82 [ 35.133941] 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 [ 35.135490] RSP: 002b:00007fffc285b318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.136124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d26ba8d82 [ 35.136728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d25fe2000 [ 35.137348] RBP: 00007f1d25fe2000 R08: 0000000000000009 R09: 0000000000001000 [ 35.138028] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562fabff8f60 [ 35.138624] R13: 00007fffc285b330 R14: 00007fffc285b360 R15: 00007fffc285b6c0 [ 35.139255] [ 35.139469] [ 35.139627] Allocated by task 213: [ 35.139944] kasan_save_stack+0x22/0x50 [ 35.140321] kasan_set_track+0x25/0x30 [ 35.140682] __kasan_slab_alloc+0x59/0x70 [ 35.141064] kmem_cache_alloc+0x16b/0x370 [ 35.141441] vm_area_dup+0x20/0x160 [ 35.141797] __split_vma+0x170/0x950 [ 35.142135] split_vma+0xc6/0x110 [ 35.142455] mprotect_fixup+0x8d2/0xb30 [ 35.142826] do_mprotect_pkey+0x87e/0xd40 [ 35.143195] __x64_sys_mprotect+0x78/0xc0 [ 35.143585] do_syscall_64+0x3f/0x90 [ 35.143936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.144397] [ 35.144568] Freed by task 213: [ 35.144856] kasan_save_stack+0x22/0x50 [ 35.145230] kasan_set_track+0x25/0x30 [ 35.145600] kasan_save_free_info+0x2b/0x50 [ 35.146036] __kasan_slab_free+0x10a/0x190 [ 35.146419] kmem_cache_free+0x10d/0x4d0 [ 35.146796] rcu_core+0x8c8/0x2860 [ 35.147111] __do_softirq+0x1b7/0x7d4 [ 35.147456] [ 35.147606] Last potentially related work creation: [ 35.148029] kasan_save_stack+0x22/0x50 [ 35.148399] __kasan_record_aux_stack+0x8e/0xa0 [ 35.148812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.149273] remove_vma+0x139/0x170 [ 35.149598] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.150040] do_vmi_munmap+0x1f1/0x2b0 [ 35.150396] __vm_munmap+0x138/0x3a0 [ 35.150760] __x64_sys_munmap+0x59/0x80 [ 35.151111] do_syscall_64+0x3f/0x90 [ 35.151453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.151949] [ 35.152110] The buggy address belongs to the object at ffff888015e981d0 [ 35.152110] which belongs to the cache vm_area_struct of size 168 [ 35.153178] The buggy address is located 88 bytes inside of [ 35.153178] freed 168-byte region [ffff888015e981d0, ffff888015e98278) [ 35.154212] [ 35.154370] The buggy address belongs to the physical page: [ 35.154849] page:00000000db9ed530 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e98 [ 35.155641] memcg:ffff88800ef71401 [ 35.155942] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.156407] page_type: 0xffffffff() [ 35.156745] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.157396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef71401 [ 35.158123] page dumped because: kasan: bad access detected [ 35.158595] [ 35.158745] Memory state around the buggy address: [ 35.159163] ffff888015e98100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.159770] ffff888015e98180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.160375] >ffff888015e98200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.160985] ^ [ 35.161387] ffff888015e98280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.162051] ffff888015e98300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.162673] ================================================================== [ 35.163568] Disabling lock debugging due to kernel taint [ 37.141468] BUG: Bad rss-counter state mm:000000007c032730 type:MM_FILEPAGES val:33 [ 37.142169] BUG: Bad rss-counter state mm:000000007c032730 type:MM_ANONPAGES val:22 [ 37.512000] BUG: Bad rss-counter state mm:000000004cedfcdf type:MM_FILEPAGES val:33 [ 37.512706] BUG: Bad rss-counter state mm:000000004cedfcdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16681' (ECDSA) to the list of known hosts. 2023/06/20 08:30:07 fuzzer started 2023/06/20 08:30:07 dialing manager at localhost:44161 2023/06/20 08:30:07 checking machine... 2023/06/20 08:30:07 checking revisions... [ 38.088607] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:30:07 testing simple program... [ 38.122959] cgroup: Unknown subsys name 'net' [ 38.154098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:30:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844b1ba3 RDX=ffff888016ab3680 RSI=0000000000000000 RDI=0000000000000001 RBP=dffffc0000000000 RSP=ffff88800d877d68 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000100 R13=ffff88800d877e70 R14=ffffffffffffffff R15=1ffff11001b0efaf RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 00007f415ad58900 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=00007f415a1e8280 CR3=000000000f68a000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fd7ef1e7e053e30900000000000ae988 XMM05=adc13a654a035e210000000000136330 XMM06=4fda316b135da52b00000000001353d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc41fcc308 CR3=0000000005482000 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=00007fc33d083510000055729b30f790 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