syzkaller login: [ 33.075693] BUG: Bad rss-counter state mm:000000009f98a516 type:MM_FILEPAGES val:33 [ 33.076382] BUG: Bad rss-counter state mm:000000009f98a516 type:MM_ANONPAGES val:22 [ 33.109799] ================================================================== [ 33.110601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.111240] Read of size 8 at addr ffff88800e1f94e0 by task sshd/219 [ 33.111768] [ 33.111907] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.112489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.113127] Call Trace: [ 33.113341] [ 33.113544] dump_stack_lvl+0x91/0xf0 [ 33.113886] print_report+0xcc/0x620 [ 33.114221] ? __virt_addr_valid+0x102/0x340 [ 33.114604] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.115031] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.115515] kasan_report+0xbe/0xf0 [ 33.115838] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.116283] vma_interval_tree_remove+0xc75/0xec0 [ 33.116689] vma_prepare+0xc54/0x11a0 [ 33.117016] __split_vma+0x5af/0x950 [ 33.117341] ? __pfx___split_vma+0x10/0x10 [ 33.117711] ? find_held_lock+0x2c/0x110 [ 33.118050] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.118417] ? lock_is_held_type+0x9f/0x120 [ 33.118788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.119204] ? mtree_range_walk+0x632/0x900 [ 33.119584] ? mas_walk+0x5c7/0x7c0 [ 33.119919] do_vmi_munmap+0x1f1/0x2b0 [ 33.120302] mmap_region+0x1f9/0x2660 [ 33.120641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.121001] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.121660] ? __pfx_lock_acquire+0x10/0x10 [ 33.122053] ? __pfx_mmap_region+0x10/0x10 [ 33.122436] ? security_mmap_addr+0x7d/0xa0 [ 33.122804] ? get_unmapped_area+0x1f5/0x3f0 [ 33.123179] do_mmap+0x854/0xf00 [ 33.123490] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.123851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.124247] ksys_mmap_pgoff+0x3af/0x500 [ 33.124619] do_syscall_64+0x3f/0x90 [ 33.124949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.125412] RIP: 0033:0x7fc57796ed82 [ 33.125759] 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 [ 33.127261] RSP: 002b:00007ffd5a8e6388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.127888] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc57796ed82 [ 33.128555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc576da8000 [ 33.129138] RBP: 00007fc576da8000 R08: 0000000000000009 R09: 0000000000001000 [ 33.129752] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ba76a8ec0 [ 33.130279] R13: 00007ffd5a8e63a0 R14: 00007ffd5a8e63d0 R15: 00007ffd5a8e6730 [ 33.130906] [ 33.131108] [ 33.131259] Allocated by task 212: [ 33.131565] kasan_save_stack+0x22/0x50 [ 33.131913] kasan_set_track+0x25/0x30 [ 33.132257] __kasan_slab_alloc+0x59/0x70 [ 33.132661] kmem_cache_alloc+0x16b/0x370 [ 33.133009] vm_area_dup+0x20/0x160 [ 33.133307] __split_vma+0x170/0x950 [ 33.133610] split_vma+0xc6/0x110 [ 33.133896] mprotect_fixup+0x8d2/0xb30 [ 33.134228] do_mprotect_pkey+0x87e/0xd40 [ 33.134610] __x64_sys_mprotect+0x78/0xc0 [ 33.134953] do_syscall_64+0x3f/0x90 [ 33.135268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.135729] [ 33.135872] Freed by task 212: [ 33.136186] kasan_save_stack+0x22/0x50 [ 33.136548] kasan_set_track+0x25/0x30 [ 33.136870] kasan_save_free_info+0x2b/0x50 [ 33.137214] __kasan_slab_free+0x10a/0x190 [ 33.137611] kmem_cache_free+0x10d/0x4d0 [ 33.137942] rcu_core+0x8c8/0x2860 [ 33.138233] __do_softirq+0x1b7/0x7d4 [ 33.138546] [ 33.138683] Last potentially related work creation: [ 33.139070] kasan_save_stack+0x22/0x50 [ 33.139399] __kasan_record_aux_stack+0x8e/0xa0 [ 33.139796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.140236] remove_vma+0x139/0x170 [ 33.140554] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.140909] do_vmi_munmap+0x1f1/0x2b0 [ 33.141218] __vm_munmap+0x138/0x3a0 [ 33.141549] __x64_sys_munmap+0x59/0x80 [ 33.141873] do_syscall_64+0x3f/0x90 [ 33.142181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.142602] [ 33.142739] The buggy address belongs to the object at ffff88800e1f9488 [ 33.142739] which belongs to the cache vm_area_struct of size 168 [ 33.143721] The buggy address is located 88 bytes inside of [ 33.143721] freed 168-byte region [ffff88800e1f9488, ffff88800e1f9530) [ 33.144840] [ 33.144992] The buggy address belongs to the physical page: [ 33.145463] page:00000000fb8aa97e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f9 [ 33.146213] memcg:ffff888016c6f201 [ 33.146524] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.147033] page_type: 0xffffffff() [ 33.147331] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.148098] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c6f201 [ 33.148763] page dumped because: kasan: bad access detected [ 33.149223] [ 33.149393] Memory state around the buggy address: [ 33.149827] ffff88800e1f9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.150428] ffff88800e1f9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.151039] >ffff88800e1f9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.151607] ^ [ 33.152136] ffff88800e1f9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.152737] ffff88800e1f9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.153293] ================================================================== [ 33.154260] Disabling lock debugging due to kernel taint [ 34.693022] BUG: Bad rss-counter state mm:00000000e0ce3c05 type:MM_FILEPAGES val:33 [ 34.693737] BUG: Bad rss-counter state mm:00000000e0ce3c05 type:MM_ANONPAGES val:22 [ 35.066592] BUG: Bad rss-counter state mm:00000000c0e1e93a type:MM_FILEPAGES val:33 [ 35.067735] BUG: Bad rss-counter state mm:00000000c0e1e93a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24969' (ECDSA) to the list of known hosts. 2023/06/20 08:54:07 fuzzer started 2023/06/20 08:54:08 dialing manager at localhost:44161 2023/06/20 08:54:08 checking machine... 2023/06/20 08:54:08 checking revisions... [ 35.652857] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:54:08 testing simple program... [ 35.688815] cgroup: Unknown subsys name 'net' [ 35.736384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:54:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f5114880f50 CR3=0000000016c30000 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=2037303a34353a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a34353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=0000000000000010 RCX=0000000000000001 RDX=0000000000002800 RSI=0000000000000010 RDI=ffff888016b7f560 RBP=dffffc0000000000 RSP=ffff888016b7f450 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000010 R13=0000000000002800 R14=ffff888016b7f4e0 R15=0000000000002800 RIP=ffffffff813ad60d 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 00007f72e1890900 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=00007f72e185f008 CR3=000000000d9e2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000