syzkaller login: [ 38.689559] BUG: Bad rss-counter state mm:0000000007e93ea9 type:MM_FILEPAGES val:33 [ 38.692357] BUG: Bad rss-counter state mm:0000000007e93ea9 type:MM_ANONPAGES val:22 [ 38.883585] ================================================================== [ 38.884213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.884833] Read of size 8 at addr ffff88800dea5ed8 by task sshd/221 [ 38.885423] [ 38.885571] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.886134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.886784] Call Trace: [ 38.887000] [ 38.887189] dump_stack_lvl+0x91/0xf0 [ 38.887526] print_report+0xcc/0x620 [ 38.887856] ? __virt_addr_valid+0x102/0x340 [ 38.888230] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888647] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889077] kasan_report+0xbe/0xf0 [ 38.897282] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897787] vma_interval_tree_remove+0xc75/0xec0 [ 38.898242] vma_prepare+0xc54/0x11a0 [ 38.898600] __split_vma+0x5af/0x950 [ 38.898959] ? __pfx___split_vma+0x10/0x10 [ 38.899361] ? find_held_lock+0x2c/0x110 [ 38.899767] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.900203] ? lock_is_held_type+0x9f/0x120 [ 38.900623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.901091] ? mtree_range_walk+0x632/0x900 [ 38.901467] ? mas_walk+0x5c7/0x7c0 [ 38.901792] do_vmi_munmap+0x1f1/0x2b0 [ 38.902126] mmap_region+0x1f9/0x2660 [ 38.902440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.902774] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.903240] ? __pfx_lock_acquire+0x10/0x10 [ 38.903604] ? __pfx_mmap_region+0x10/0x10 [ 38.903954] ? security_mmap_addr+0x7d/0xa0 [ 38.904311] ? get_unmapped_area+0x1f5/0x3f0 [ 38.904682] do_mmap+0x854/0xf00 [ 38.904979] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.905352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.905732] ksys_mmap_pgoff+0x3af/0x500 [ 38.906078] do_syscall_64+0x3f/0x90 [ 38.906406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906843] RIP: 0033:0x7fad4dcf1d82 [ 38.907157] 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 [ 38.908547] RSP: 002b:00007ffe185975b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.909179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad4dcf1d82 [ 38.909732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad4d12b000 [ 38.910294] RBP: 00007fad4d12b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.910853] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560aed9ed90 [ 38.911518] R13: 00007ffe185975d0 R14: 00007ffe18597600 R15: 00007ffe18597960 [ 38.912087] [ 38.912292] [ 38.912444] Allocated by task 212: [ 38.912741] kasan_save_stack+0x22/0x50 [ 38.913119] kasan_set_track+0x25/0x30 [ 38.913441] __kasan_slab_alloc+0x59/0x70 [ 38.913790] kmem_cache_alloc+0x16b/0x370 [ 38.914135] vm_area_dup+0x20/0x160 [ 38.914438] __split_vma+0x170/0x950 [ 38.914748] split_vma+0xc6/0x110 [ 38.915020] mprotect_fixup+0x8d2/0xb30 [ 38.915330] do_mprotect_pkey+0x87e/0xd40 [ 38.915676] __x64_sys_mprotect+0x78/0xc0 [ 38.916025] do_syscall_64+0x3f/0x90 [ 38.916349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916779] [ 38.916926] Freed by task 87: [ 38.917244] kasan_save_stack+0x22/0x50 [ 38.917581] kasan_set_track+0x25/0x30 [ 38.917914] kasan_save_free_info+0x2b/0x50 [ 38.918272] __kasan_slab_free+0x10a/0x190 [ 38.918629] kmem_cache_free+0x10d/0x4d0 [ 38.918969] rcu_core+0x8c8/0x2860 [ 38.919275] __do_softirq+0x1b7/0x7d4 [ 38.919598] [ 38.919744] Last potentially related work creation: [ 38.920130] kasan_save_stack+0x22/0x50 [ 38.920477] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920867] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921345] remove_vma+0x139/0x170 [ 38.921658] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922044] do_vmi_munmap+0x1f1/0x2b0 [ 38.922382] __vm_munmap+0x138/0x3a0 [ 38.922709] __x64_sys_munmap+0x59/0x80 [ 38.923054] do_syscall_64+0x3f/0x90 [ 38.923387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923821] [ 38.923977] The buggy address belongs to the object at ffff88800dea5e80 [ 38.923977] which belongs to the cache vm_area_struct of size 168 [ 38.924976] The buggy address is located 88 bytes inside of [ 38.924976] freed 168-byte region [ffff88800dea5e80, ffff88800dea5f28) [ 38.926018] [ 38.926204] The buggy address belongs to the physical page: [ 38.926654] page:000000005ba36b7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea5 [ 38.927394] memcg:ffff88800d34a001 [ 38.927691] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.928175] page_type: 0xffffffff() [ 38.928488] raw: 0100000000000200 ffff8880087a0c80 ffffea00003643c0 dead000000000007 [ 38.929162] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d34a001 [ 38.929779] page dumped because: kasan: bad access detected [ 38.930234] [ 38.930385] Memory state around the buggy address: [ 38.930775] ffff88800dea5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.931342] ffff88800dea5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.931913] >ffff88800dea5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.932528] ^ [ 38.933050] ffff88800dea5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.933638] ffff88800dea5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.934200] ================================================================== [ 38.934922] Disabling lock debugging due to kernel taint [ 41.467658] BUG: Bad rss-counter state mm:00000000a4233727 type:MM_FILEPAGES val:33 [ 41.468309] BUG: Bad rss-counter state mm:00000000a4233727 type:MM_ANONPAGES val:22 [ 42.994424] BUG: Bad rss-counter state mm:0000000060fd4ef3 type:MM_FILEPAGES val:33 [ 42.995050] BUG: Bad rss-counter state mm:0000000060fd4ef3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45261' (ECDSA) to the list of known hosts. 2023/06/21 08:17:37 fuzzer started 2023/06/21 08:17:38 dialing manager at localhost:36067 2023/06/21 08:17:38 checking machine... 2023/06/21 08:17:38 checking revisions... [ 43.915114] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:17:38 testing simple program... [ 43.981336] cgroup: Unknown subsys name 'net' [ 44.085849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:17:37 Registers: info registers vcpu 0 RAX=ffff88800e202500 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800da4e200 RBP=ffff8880087b8780 RSP=ffff88800dad7a38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800da4e200 R13=0000000000000000 R14=ffff88800dad7a90 R15=ffffea00003a5780 RIP=ffffffff81803e53 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 00007efc6262b900 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=00007efc61af64d0 CR3=000000000d872000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bf9db35a5ccecda90000000000133898 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=918ab74982a4372e00000000000ae988 XMM07=00000000000000000000000000000000 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88809817a220 RCX=ffffffff811430ee RDX=ffff888015999b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88801817a220 RSP=ffff88801589fca0 R8 =0000000000000006 R9 =ffff88801817a220 R10=ffff88809817a220 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=ffffffff85d3e300 RIP=ffffffff814c086b 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 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=00007fb02f7cd298 CR3=0000000015868000 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=756e696c2d34365f3638782f62696c2f XMM01=2e6f747079726362696c2f756e672d78 XMM02=00312e312e6f732e6f74707972636269 XMM03=6c2f756e672d78756e696c2d34365f36 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000