syzkaller login: [ 31.069018] BUG: Bad rss-counter state mm:00000000b25d8513 type:MM_FILEPAGES val:33 [ 31.069770] BUG: Bad rss-counter state mm:00000000b25d8513 type:MM_ANONPAGES val:22 [ 31.192710] ================================================================== [ 31.193340] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.194004] Read of size 8 at addr ffff88800fd1eed8 by task sshd/222 [ 31.194457] [ 31.194588] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.195095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.195674] Call Trace: [ 31.195870] [ 31.196040] dump_stack_lvl+0x91/0xf0 [ 31.196339] print_report+0xcc/0x620 [ 31.196905] ? __virt_addr_valid+0x102/0x340 [ 31.197263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197674] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198103] kasan_report+0xbe/0xf0 [ 31.198404] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198819] vma_interval_tree_remove+0xc75/0xec0 [ 31.199237] vma_prepare+0xc54/0x11a0 [ 31.199549] __split_vma+0x5af/0x950 [ 31.199863] ? __pfx___split_vma+0x10/0x10 [ 31.200213] ? find_held_lock+0x2c/0x110 [ 31.200555] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.200928] ? lock_is_held_type+0x9f/0x120 [ 31.201270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.201707] ? mtree_range_walk+0x632/0x900 [ 31.202125] ? mas_walk+0x5c7/0x7c0 [ 31.202421] do_vmi_munmap+0x1f1/0x2b0 [ 31.202732] mmap_region+0x1f9/0x2660 [ 31.203060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.203393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.203863] ? __pfx_lock_acquire+0x10/0x10 [ 31.204224] ? __pfx_mmap_region+0x10/0x10 [ 31.204596] ? security_mmap_addr+0x7d/0xa0 [ 31.205034] ? get_unmapped_area+0x1f5/0x3f0 [ 31.205441] do_mmap+0x854/0xf00 [ 31.205746] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.206115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.206489] ksys_mmap_pgoff+0x3af/0x500 [ 31.206864] do_syscall_64+0x3f/0x90 [ 31.207240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207720] RIP: 0033:0x7ff0b4243d82 [ 31.208015] 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 [ 31.209453] RSP: 002b:00007ffc842fbeb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.210096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0b4243d82 [ 31.210755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0b367d000 [ 31.211351] RBP: 00007ff0b367d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.211948] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdc25e8f70 [ 31.212556] R13: 00007ffc842fbed0 R14: 00007ffc842fbf00 R15: 00007ffc842fc260 [ 31.213195] [ 31.213400] [ 31.213541] Allocated by task 214: [ 31.213869] kasan_save_stack+0x22/0x50 [ 31.214220] kasan_set_track+0x25/0x30 [ 31.214553] __kasan_slab_alloc+0x59/0x70 [ 31.214946] kmem_cache_alloc+0x16b/0x370 [ 31.215342] vm_area_dup+0x20/0x160 [ 31.215663] __split_vma+0x170/0x950 [ 31.215965] split_vma+0xc6/0x110 [ 31.216251] mprotect_fixup+0x8d2/0xb30 [ 31.216596] do_mprotect_pkey+0x87e/0xd40 [ 31.217008] __x64_sys_mprotect+0x78/0xc0 [ 31.217350] do_syscall_64+0x3f/0x90 [ 31.217714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218172] [ 31.218315] Freed by task 214: [ 31.218569] kasan_save_stack+0x22/0x50 [ 31.218950] kasan_set_track+0x25/0x30 [ 31.219270] kasan_save_free_info+0x2b/0x50 [ 31.219623] __kasan_slab_free+0x10a/0x190 [ 31.219983] kmem_cache_free+0x10d/0x4d0 [ 31.220324] rcu_core+0x8c8/0x2860 [ 31.220700] __do_softirq+0x1b7/0x7d4 [ 31.221064] [ 31.221206] Last potentially related work creation: [ 31.221613] kasan_save_stack+0x22/0x50 [ 31.221986] __kasan_record_aux_stack+0x8e/0xa0 [ 31.222360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.222769] remove_vma+0x139/0x170 [ 31.223069] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.223447] do_vmi_munmap+0x1f1/0x2b0 [ 31.223761] __vm_munmap+0x138/0x3a0 [ 31.224070] __x64_sys_munmap+0x59/0x80 [ 31.224393] do_syscall_64+0x3f/0x90 [ 31.224712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225146] [ 31.225291] The buggy address belongs to the object at ffff88800fd1ee80 [ 31.225291] which belongs to the cache vm_area_struct of size 168 [ 31.226309] The buggy address is located 88 bytes inside of [ 31.226309] freed 168-byte region [ffff88800fd1ee80, ffff88800fd1ef28) [ 31.227265] [ 31.227408] The buggy address belongs to the physical page: [ 31.227870] page:0000000007496d96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1e [ 31.228591] memcg:ffff88800e28a901 [ 31.228876] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.229314] page_type: 0xffffffff() [ 31.229626] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.230253] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e28a901 [ 31.230845] page dumped because: kasan: bad access detected [ 31.231286] [ 31.231433] Memory state around the buggy address: [ 31.231821] ffff88800fd1ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.232382] ffff88800fd1ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.232933] >ffff88800fd1ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.233478] ^ [ 31.233978] ffff88800fd1ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.234529] ffff88800fd1ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.235092] ================================================================== [ 31.235764] Disabling lock debugging due to kernel taint [ 32.637940] BUG: Bad rss-counter state mm:000000003dfb5b9f type:MM_FILEPAGES val:33 [ 32.638641] BUG: Bad rss-counter state mm:000000003dfb5b9f type:MM_ANONPAGES val:22 [ 33.055733] BUG: Bad rss-counter state mm:000000006935e93d type:MM_FILEPAGES val:33 [ 33.056463] BUG: Bad rss-counter state mm:000000006935e93d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4104' (ECDSA) to the list of known hosts. 2023/06/20 08:59:36 fuzzer started 2023/06/20 08:59:37 dialing manager at localhost:44161 2023/06/20 08:59:37 checking machine... 2023/06/20 08:59:37 checking revisions... [ 33.568897] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:59:37 testing simple program... [ 33.597109] cgroup: Unknown subsys name 'net' [ 33.631974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:59:36 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85fa3dfc RCX=ffffffff83640763 RDX=0000000000000000 RSI=ffffffff863b22f0 RDI=ffffffff85fa3dec RBP=ffffffff85fa3dec RSP=ffff88801bdc73a0 R8 =ffffffff863b22f0 R9 =ffff88801bdc7498 R10=0000000000038001 R11=000000000008aa86 R12=ffffffff85fa3e0c R13=ffffffff85fa3dec R14=ffffffff85fa3dec R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007f9391e8c900 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=00007ffc6e2f9000 CR3=000000001bcd0000 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=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 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=00007f9392443618 CR3=0000000015bda000 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=2036333a39353a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a39353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000