syzkaller login: [ 31.752048] BUG: Bad rss-counter state mm:0000000095e391e6 type:MM_FILEPAGES val:33 [ 31.753054] BUG: Bad rss-counter state mm:0000000095e391e6 type:MM_ANONPAGES val:22 [ 31.915395] ================================================================== [ 31.916471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.917588] Read of size 8 at addr ffff8880133134e0 by task sshd/219 [ 31.918616] [ 31.918838] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.919723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.920730] Call Trace: [ 31.921050] [ 31.921337] dump_stack_lvl+0x91/0xf0 [ 31.921837] print_report+0xcc/0x620 [ 31.922319] ? __virt_addr_valid+0x102/0x340 [ 31.922873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.923497] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.924119] kasan_report+0xbe/0xf0 [ 31.924589] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.925232] vma_interval_tree_remove+0xc75/0xec0 [ 31.925873] vma_prepare+0xc54/0x11a0 [ 31.926388] __split_vma+0x5af/0x950 [ 31.926891] ? __pfx___split_vma+0x10/0x10 [ 31.927470] ? find_held_lock+0x2c/0x110 [ 31.928028] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.928621] ? lock_is_held_type+0x9f/0x120 [ 31.929193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.929847] ? mtree_range_walk+0x632/0x900 [ 31.930441] ? mas_walk+0x5c7/0x7c0 [ 31.930949] do_vmi_munmap+0x1f1/0x2b0 [ 31.931475] mmap_region+0x1f9/0x2660 [ 31.931988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.932536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.933299] ? __pfx_lock_acquire+0x10/0x10 [ 31.933871] ? __pfx_mmap_region+0x10/0x10 [ 31.934441] ? security_mmap_addr+0x7d/0xa0 [ 31.935006] ? get_unmapped_area+0x1f5/0x3f0 [ 31.935637] do_mmap+0x854/0xf00 [ 31.936103] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.936631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.937224] ksys_mmap_pgoff+0x3af/0x500 [ 31.937762] do_syscall_64+0x3f/0x90 [ 31.938270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.938961] RIP: 0033:0x7f3f9b5e0d82 [ 31.939453] 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 [ 31.941769] RSP: 002b:00007fffd8ce7ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.942747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f9b5e0d82 [ 31.943652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f9aa1a000 [ 31.944562] RBP: 00007f3f9aa1a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.945482] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1d7377ec0 [ 31.946397] R13: 00007fffd8ce7b00 R14: 00007fffd8ce7b30 R15: 00007fffd8ce7e90 [ 31.947313] [ 31.947642] [ 31.947869] Allocated by task 212: [ 31.948322] kasan_save_stack+0x22/0x50 [ 31.948849] kasan_set_track+0x25/0x30 [ 31.949375] __kasan_slab_alloc+0x59/0x70 [ 31.949938] kmem_cache_alloc+0x16b/0x370 [ 31.950486] vm_area_dup+0x20/0x160 [ 31.950970] __split_vma+0x170/0x950 [ 31.951499] split_vma+0xc6/0x110 [ 31.951977] mprotect_fixup+0x8d2/0xb30 [ 31.952505] do_mprotect_pkey+0x87e/0xd40 [ 31.953062] __x64_sys_mprotect+0x78/0xc0 [ 31.953616] do_syscall_64+0x3f/0x90 [ 31.954133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.954812] [ 31.955043] Freed by task 212: [ 31.955475] kasan_save_stack+0x22/0x50 [ 31.956011] kasan_set_track+0x25/0x30 [ 31.956538] kasan_save_free_info+0x2b/0x50 [ 31.957108] __kasan_slab_free+0x10a/0x190 [ 31.957684] kmem_cache_free+0x10d/0x4d0 [ 31.958231] rcu_core+0x8c8/0x2860 [ 31.958706] __do_softirq+0x1b7/0x7d4 [ 31.959282] [ 31.959523] Last potentially related work creation: [ 31.960141] kasan_save_stack+0x22/0x50 [ 31.960680] __kasan_record_aux_stack+0x8e/0xa0 [ 31.961295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.961982] remove_vma+0x139/0x170 [ 31.962472] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.963070] do_vmi_munmap+0x1f1/0x2b0 [ 31.963621] __vm_munmap+0x138/0x3a0 [ 31.964129] __x64_sys_munmap+0x59/0x80 [ 31.964665] do_syscall_64+0x3f/0x90 [ 31.965176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.965859] [ 31.966083] The buggy address belongs to the object at ffff888013313488 [ 31.966083] which belongs to the cache vm_area_struct of size 168 [ 31.967683] The buggy address is located 88 bytes inside of [ 31.967683] freed 168-byte region [ffff888013313488, ffff888013313530) [ 31.969205] [ 31.969441] The buggy address belongs to the physical page: [ 31.970139] page:00000000e85efecf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13313 [ 31.971305] memcg:ffff88800cf17301 [ 31.971776] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.972464] page_type: 0xffffffff() [ 31.972944] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.973928] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf17301 [ 31.974899] page dumped because: kasan: bad access detected [ 31.975638] [ 31.975866] Memory state around the buggy address: [ 31.976489] ffff888013313380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.977420] ffff888013313400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.978348] >ffff888013313480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.979216] ^ [ 31.979984] ffff888013313500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.980859] ffff888013313580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.981721] ================================================================== [ 31.982761] Disabling lock debugging due to kernel taint [ 34.480890] BUG: Bad rss-counter state mm:00000000d9bc8f9a type:MM_FILEPAGES val:33 [ 34.481927] BUG: Bad rss-counter state mm:00000000d9bc8f9a type:MM_ANONPAGES val:22 [ 34.952742] BUG: Bad rss-counter state mm:00000000299934f6 type:MM_FILEPAGES val:33 [ 34.953955] BUG: Bad rss-counter state mm:00000000299934f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36082' (ECDSA) to the list of known hosts. 2023/06/19 12:39:35 fuzzer started 2023/06/19 12:39:35 dialing manager at localhost:44161 2023/06/19 12:39:35 checking machine... 2023/06/19 12:39:35 checking revisions... [ 35.587574] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:39:35 testing simple program... [ 35.639197] cgroup: Unknown subsys name 'net' [ 35.698486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:39:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8614cbf8 RDX=1ffff1100d9c135f RSI=1ffff1100d9c135e RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8614cbfc R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000246b2 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888016cc7cf8 R15=ffff88806ce09a98 RIP=ffffffff811310ce 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 00007f1a56951900 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=00007f0a7c6b6120 CR3=000000001659e000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007ffc70c05fd8 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=00007f095e2265100000557c3ae05790 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