syzkaller login: [ 31.082556] BUG: Bad rss-counter state mm:00000000185ed3d9 type:MM_FILEPAGES val:33 [ 31.083222] BUG: Bad rss-counter state mm:00000000185ed3d9 type:MM_ANONPAGES val:22 [ 31.201584] ================================================================== [ 31.202267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.202922] Read of size 8 at addr ffff88801683f228 by task sshd/219 [ 31.203448] [ 31.203597] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.204190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.204889] Call Trace: [ 31.205117] [ 31.205318] dump_stack_lvl+0x91/0xf0 [ 31.205664] print_report+0xcc/0x620 [ 31.206147] ? __virt_addr_valid+0x102/0x340 [ 31.206544] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206992] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207431] kasan_report+0xbe/0xf0 [ 31.207764] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208212] vma_interval_tree_remove+0xc75/0xec0 [ 31.208651] vma_prepare+0xc54/0x11a0 [ 31.208984] __split_vma+0x5af/0x950 [ 31.209323] ? __pfx___split_vma+0x10/0x10 [ 31.209698] ? find_held_lock+0x2c/0x110 [ 31.210066] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.210464] ? lock_is_held_type+0x9f/0x120 [ 31.210852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.211291] ? mtree_range_walk+0x632/0x900 [ 31.211687] ? mas_walk+0x5c7/0x7c0 [ 31.212025] do_vmi_munmap+0x1f1/0x2b0 [ 31.212387] mmap_region+0x1f9/0x2660 [ 31.212724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.213086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.213604] ? __pfx_lock_acquire+0x10/0x10 [ 31.213979] ? __pfx_mmap_region+0x10/0x10 [ 31.214361] ? security_mmap_addr+0x7d/0xa0 [ 31.214758] ? get_unmapped_area+0x1f5/0x3f0 [ 31.215150] do_mmap+0x854/0xf00 [ 31.215455] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.215802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.216190] ksys_mmap_pgoff+0x3af/0x500 [ 31.216593] do_syscall_64+0x3f/0x90 [ 31.216925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217383] RIP: 0033:0x7f2c05ad3d82 [ 31.217709] 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 [ 31.219223] RSP: 002b:00007ffea88cc088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.219848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c05ad3d82 [ 31.220455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c04f0d000 [ 31.221058] RBP: 00007f2c04f0d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.221657] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b646ff3ec0 [ 31.222247] R13: 00007ffea88cc0a0 R14: 00007ffea88cc0d0 R15: 00007ffea88cc430 [ 31.222837] [ 31.223045] [ 31.223193] Allocated by task 212: [ 31.223499] kasan_save_stack+0x22/0x50 [ 31.223866] kasan_set_track+0x25/0x30 [ 31.224217] __kasan_slab_alloc+0x59/0x70 [ 31.224620] kmem_cache_alloc+0x16b/0x370 [ 31.224987] vm_area_dup+0x20/0x160 [ 31.225303] __split_vma+0x170/0x950 [ 31.225648] split_vma+0xc6/0x110 [ 31.225970] mprotect_fixup+0x8d2/0xb30 [ 31.226334] do_mprotect_pkey+0x87e/0xd40 [ 31.226709] __x64_sys_mprotect+0x78/0xc0 [ 31.227081] do_syscall_64+0x3f/0x90 [ 31.227428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227883] [ 31.228037] Freed by task 212: [ 31.228317] kasan_save_stack+0x22/0x50 [ 31.228691] kasan_set_track+0x25/0x30 [ 31.229039] kasan_save_free_info+0x2b/0x50 [ 31.229413] __kasan_slab_free+0x10a/0x190 [ 31.229797] kmem_cache_free+0x10d/0x4d0 [ 31.230153] rcu_core+0x8c8/0x2860 [ 31.230461] __do_softirq+0x1b7/0x7d4 [ 31.230807] [ 31.230973] Last potentially related work creation: [ 31.231377] kasan_save_stack+0x22/0x50 [ 31.231738] __kasan_record_aux_stack+0x8e/0xa0 [ 31.232153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.232623] remove_vma+0x139/0x170 [ 31.232940] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.233332] do_vmi_munmap+0x1f1/0x2b0 [ 31.233680] __vm_munmap+0x138/0x3a0 [ 31.234008] __x64_sys_munmap+0x59/0x80 [ 31.234360] do_syscall_64+0x3f/0x90 [ 31.234697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235160] [ 31.235312] The buggy address belongs to the object at ffff88801683f1d0 [ 31.235312] which belongs to the cache vm_area_struct of size 168 [ 31.236341] The buggy address is located 88 bytes inside of [ 31.236341] freed 168-byte region [ffff88801683f1d0, ffff88801683f278) [ 31.237371] [ 31.237525] The buggy address belongs to the physical page: [ 31.237991] page:000000008f3c50aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1683f [ 31.238756] memcg:ffff88800d837d01 [ 31.239061] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239520] page_type: 0xffffffff() [ 31.239848] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.240520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d837d01 [ 31.241153] page dumped because: kasan: bad access detected [ 31.241613] [ 31.241766] Memory state around the buggy address: [ 31.242173] ffff88801683f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.242784] ffff88801683f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.243382] >ffff88801683f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.243999] ^ [ 31.244411] ffff88801683f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.245010] ffff88801683f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.245626] ================================================================== [ 31.246533] Disabling lock debugging due to kernel taint [ 32.656115] BUG: Bad rss-counter state mm:000000001699fcec type:MM_FILEPAGES val:33 [ 32.657276] BUG: Bad rss-counter state mm:000000001699fcec type:MM_ANONPAGES val:22 [ 33.011598] BUG: Bad rss-counter state mm:00000000d5c1b9d4 type:MM_FILEPAGES val:33 [ 33.012285] BUG: Bad rss-counter state mm:00000000d5c1b9d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63685' (ECDSA) to the list of known hosts. 2023/06/20 09:38:32 fuzzer started 2023/06/20 09:38:33 dialing manager at localhost:44161 2023/06/20 09:38:33 checking machine... 2023/06/20 09:38:33 checking revisions... [ 33.526290] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:38:33 testing simple program... [ 33.557263] cgroup: Unknown subsys name 'net' [ 33.587830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:38:32 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=00007ffd1d141fe8 CR3=000000000e0f6000 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=2032333a38333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a38333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d75769 RBX=ffff88800ebabb18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ebabb48 RBP=ffff88800b6802f0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800b680178 R14=ffffffff813782a8 R15=ffff88800da04980 RIP=ffffffff81846362 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 00007f5faba9d900 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=00007ffd72fa2000 CR3=0000000019e9a000 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