syzkaller login: [ 31.666809] BUG: Bad rss-counter state mm:00000000eb9d573d type:MM_FILEPAGES val:33 [ 31.668350] BUG: Bad rss-counter state mm:00000000eb9d573d type:MM_ANONPAGES val:22 [ 31.910809] ================================================================== [ 31.911817] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.912896] Read of size 8 at addr ffff888018f39140 by task sshd/219 [ 31.913732] [ 31.913953] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.914814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.915816] Call Trace: [ 31.916140] [ 31.916431] dump_stack_lvl+0x91/0xf0 [ 31.916966] print_report+0xcc/0x620 [ 31.917503] ? __virt_addr_valid+0x102/0x340 [ 31.918065] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.918694] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919322] kasan_report+0xbe/0xf0 [ 31.919832] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.920477] vma_interval_tree_remove+0xc75/0xec0 [ 31.921145] vma_prepare+0xc54/0x11a0 [ 31.921671] __split_vma+0x5af/0x950 [ 31.922240] ? __pfx___split_vma+0x10/0x10 [ 31.922796] ? find_held_lock+0x2c/0x110 [ 31.923333] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.923906] ? lock_is_held_type+0x9f/0x120 [ 31.924464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.925087] ? mtree_range_walk+0x632/0x900 [ 31.925664] ? mas_walk+0x5c7/0x7c0 [ 31.926141] do_vmi_munmap+0x1f1/0x2b0 [ 31.926647] mmap_region+0x1f9/0x2660 [ 31.927134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.927663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.928432] ? __pfx_lock_acquire+0x10/0x10 [ 31.929020] ? __pfx_mmap_region+0x10/0x10 [ 31.929636] ? security_mmap_addr+0x7d/0xa0 [ 31.930222] ? get_unmapped_area+0x1f5/0x3f0 [ 31.930847] do_mmap+0x854/0xf00 [ 31.931344] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.931881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.932505] ksys_mmap_pgoff+0x3af/0x500 [ 31.933052] do_syscall_64+0x3f/0x90 [ 31.933552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.934230] RIP: 0033:0x7f106ebe7d82 [ 31.934710] 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 [ 31.937145] RSP: 002b:00007fff38ad44b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.938120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f106ebe7d82 [ 31.939021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f106e021000 [ 31.939940] RBP: 00007f106e021000 R08: 0000000000000009 R09: 0000000000001000 [ 31.940861] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b50b616980 [ 31.941785] R13: 00007fff38ad44d0 R14: 00007fff38ad4500 R15: 00007fff38ad4860 [ 31.942710] [ 31.943016] [ 31.943244] Allocated by task 212: [ 31.943718] kasan_save_stack+0x22/0x50 [ 31.944264] kasan_set_track+0x25/0x30 [ 31.944814] __kasan_slab_alloc+0x59/0x70 [ 31.945386] kmem_cache_alloc+0x16b/0x370 [ 31.945933] vm_area_dup+0x20/0x160 [ 31.946433] __split_vma+0x170/0x950 [ 31.946921] split_vma+0xc6/0x110 [ 31.947416] mprotect_fixup+0x8d2/0xb30 [ 31.947976] do_mprotect_pkey+0x87e/0xd40 [ 31.948657] __x64_sys_mprotect+0x78/0xc0 [ 31.949218] do_syscall_64+0x3f/0x90 [ 31.949767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.950555] [ 31.950860] Freed by task 212: [ 31.951421] kasan_save_stack+0x22/0x50 [ 31.952137] kasan_set_track+0x25/0x30 [ 31.952846] kasan_save_free_info+0x2b/0x50 [ 31.953604] __kasan_slab_free+0x10a/0x190 [ 31.954381] kmem_cache_free+0x10d/0x4d0 [ 31.955098] rcu_core+0x8c8/0x2860 [ 31.955711] __do_softirq+0x1b7/0x7d4 [ 31.956375] [ 31.956706] Last potentially related work creation: [ 31.957555] kasan_save_stack+0x22/0x50 [ 31.958264] __kasan_record_aux_stack+0x8e/0xa0 [ 31.959075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.959987] remove_vma+0x139/0x170 [ 31.960655] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.961454] do_vmi_munmap+0x1f1/0x2b0 [ 31.962151] __vm_munmap+0x138/0x3a0 [ 31.962831] __x64_sys_munmap+0x59/0x80 [ 31.963601] do_syscall_64+0x3f/0x90 [ 31.964265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.965206] [ 31.965510] The buggy address belongs to the object at ffff888018f390e8 [ 31.965510] which belongs to the cache vm_area_struct of size 168 [ 31.967457] The buggy address is located 88 bytes inside of [ 31.967457] freed 168-byte region [ffff888018f390e8, ffff888018f39190) [ 31.968964] [ 31.969194] The buggy address belongs to the physical page: [ 31.969902] page:000000008d48b227 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f39 [ 31.971062] memcg:ffff88800e65d501 [ 31.971554] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.972231] page_type: 0xffffffff() [ 31.972729] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.973724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e65d501 [ 31.974828] page dumped because: kasan: bad access detected [ 31.975551] [ 31.975776] Memory state around the buggy address: [ 31.976395] ffff888018f39000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.977347] ffff888018f39080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.978274] >ffff888018f39100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.979266] ^ [ 31.980015] ffff888018f39180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.981201] ffff888018f39200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.982404] ================================================================== [ 31.984132] Disabling lock debugging due to kernel taint [ 33.944645] BUG: Bad rss-counter state mm:00000000f833780d type:MM_FILEPAGES val:33 [ 33.946144] BUG: Bad rss-counter state mm:00000000f833780d type:MM_ANONPAGES val:22 [ 34.433947] BUG: Bad rss-counter state mm:00000000fa86429a type:MM_FILEPAGES val:33 [ 34.434881] BUG: Bad rss-counter state mm:00000000fa86429a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5860' (ECDSA) to the list of known hosts. 2023/06/21 05:04:00 fuzzer started 2023/06/21 05:04:00 dialing manager at localhost:36067 2023/06/21 05:04:00 checking machine... 2023/06/21 05:04:00 checking revisions... [ 35.222982] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:04:00 testing simple program... [ 35.283311] cgroup: Unknown subsys name 'net' [ 35.325445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:04:00 Registers: info registers vcpu 0 RAX=ffffffff8614287b RBX=0000000000000001 RCX=ffffffff86142876 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880147d7510 RSP=ffff8880147d7448 R8 =ffffffff8614287a R9 =ffff8880147d74f8 R10=0000000000038001 R11=000000000002273d R12=ffff8880147d7518 R13=ffff8880147d7500 R14=ffff8880147d74f9 R15=ffff8880147d74b8 RIP=ffffffff81130abf 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 00007f47f8ca5700 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=00007f5b8c2823a0 CR3=000000000d9ee000 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=2039353a33303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11000d2db69 RBX=ffff88800696db18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800696db48 RBP=ffff88800cfd3180 RSP=ffff88800fc5fd28 R8 =0000000000000001 R9 =ffffed1001f8bf99 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800cfd32e0 R14=ffffffff81ef10be R15=ffff88801864ba40 RIP=ffffffff818464e2 RFL=00000046 [---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 00007fdc939ae900 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=00007ffe8a23d000 CR3=000000001600a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000