syzkaller login: [ 30.589534] BUG: Bad rss-counter state mm:000000005e8de97e type:MM_FILEPAGES val:33 [ 30.591554] BUG: Bad rss-counter state mm:000000005e8de97e type:MM_ANONPAGES val:22 [ 30.758057] ================================================================== [ 30.759285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.760696] Read of size 8 at addr ffff88800e4b8a50 by task sshd/219 [ 30.761719] [ 30.762010] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.763172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.764503] Call Trace: [ 30.764923] [ 30.765250] dump_stack_lvl+0x91/0xf0 [ 30.765808] print_report+0xcc/0x620 [ 30.766353] ? __virt_addr_valid+0x102/0x340 [ 30.766969] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767659] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768344] kasan_report+0xbe/0xf0 [ 30.768867] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769546] vma_interval_tree_remove+0xc75/0xec0 [ 30.770205] vma_prepare+0xc54/0x11a0 [ 30.770734] __split_vma+0x5af/0x950 [ 30.771247] ? __pfx___split_vma+0x10/0x10 [ 30.771849] ? find_held_lock+0x2c/0x110 [ 30.772421] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.773060] ? lock_is_held_type+0x9f/0x120 [ 30.773660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.774307] ? mtree_range_walk+0x632/0x900 [ 30.774890] ? mas_walk+0x5c7/0x7c0 [ 30.775400] do_vmi_munmap+0x1f1/0x2b0 [ 30.775922] mmap_region+0x1f9/0x2660 [ 30.776427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.776959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.777714] ? __pfx_lock_acquire+0x10/0x10 [ 30.778296] ? __pfx_mmap_region+0x10/0x10 [ 30.778890] ? security_mmap_addr+0x7d/0xa0 [ 30.779491] ? get_unmapped_area+0x1f5/0x3f0 [ 30.780105] do_mmap+0x854/0xf00 [ 30.780599] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.781139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.781718] ksys_mmap_pgoff+0x3af/0x500 [ 30.782267] do_syscall_64+0x3f/0x90 [ 30.782786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783493] RIP: 0033:0x7f758ebe3d82 [ 30.784001] 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 [ 30.786282] RSP: 002b:00007ffe83e3a398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.787244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f758ebe3d82 [ 30.788182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f758e01d000 [ 30.789083] RBP: 00007f758e01d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.789994] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558eac6d5b20 [ 30.790912] R13: 00007ffe83e3a3b0 R14: 00007ffe83e3a3e0 R15: 00007ffe83e3a740 [ 30.791836] [ 30.792150] [ 30.792379] Allocated by task 212: [ 30.792836] kasan_save_stack+0x22/0x50 [ 30.793370] kasan_set_track+0x25/0x30 [ 30.793894] __kasan_slab_alloc+0x59/0x70 [ 30.794478] kmem_cache_alloc+0x16b/0x370 [ 30.795024] vm_area_dup+0x20/0x160 [ 30.795515] __split_vma+0x170/0x950 [ 30.796028] split_vma+0xc6/0x110 [ 30.796494] mprotect_fixup+0x8d2/0xb30 [ 30.797035] do_mprotect_pkey+0x87e/0xd40 [ 30.797590] __x64_sys_mprotect+0x78/0xc0 [ 30.798144] do_syscall_64+0x3f/0x90 [ 30.798755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799604] [ 30.799861] Freed by task 212: [ 30.800275] kasan_save_stack+0x22/0x50 [ 30.800952] kasan_set_track+0x25/0x30 [ 30.801482] kasan_save_free_info+0x2b/0x50 [ 30.802075] __kasan_slab_free+0x10a/0x190 [ 30.802646] kmem_cache_free+0x10d/0x4d0 [ 30.803189] rcu_core+0x8c8/0x2860 [ 30.803657] __do_softirq+0x1b7/0x7d4 [ 30.804204] [ 30.804434] Last potentially related work creation: [ 30.805048] kasan_save_stack+0x22/0x50 [ 30.805579] __kasan_record_aux_stack+0x8e/0xa0 [ 30.806179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.806861] remove_vma+0x139/0x170 [ 30.807342] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.807946] do_vmi_munmap+0x1f1/0x2b0 [ 30.808474] __vm_munmap+0x138/0x3a0 [ 30.808984] __x64_sys_munmap+0x59/0x80 [ 30.809530] do_syscall_64+0x3f/0x90 [ 30.810054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810802] [ 30.811066] The buggy address belongs to the object at ffff88800e4b89f8 [ 30.811066] which belongs to the cache vm_area_struct of size 168 [ 30.812725] The buggy address is located 88 bytes inside of [ 30.812725] freed 168-byte region [ffff88800e4b89f8, ffff88800e4b8aa0) [ 30.814213] [ 30.814446] The buggy address belongs to the physical page: [ 30.815146] page:000000007d4ab24d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4b8 [ 30.816305] memcg:ffff88801462f401 [ 30.816750] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817430] page_type: 0xffffffff() [ 30.817957] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.818952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801462f401 [ 30.819961] page dumped because: kasan: bad access detected [ 30.820664] [ 30.820893] Memory state around the buggy address: [ 30.821511] ffff88800e4b8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.822486] ffff88800e4b8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.823404] >ffff88800e4b8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.824350] ^ [ 30.825098] ffff88800e4b8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.826062] ffff88800e4b8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.827011] ================================================================== [ 30.828056] Disabling lock debugging due to kernel taint [ 32.894042] BUG: Bad rss-counter state mm:00000000ede9124b type:MM_FILEPAGES val:33 [ 32.895189] BUG: Bad rss-counter state mm:00000000ede9124b type:MM_ANONPAGES val:22 [ 33.349027] BUG: Bad rss-counter state mm:000000007d4059df type:MM_FILEPAGES val:33 [ 33.350173] BUG: Bad rss-counter state mm:000000007d4059df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5022' (ECDSA) to the list of known hosts. 2023/06/21 05:54:00 fuzzer started 2023/06/21 05:54:00 dialing manager at localhost:36067 2023/06/21 05:54:00 checking machine... 2023/06/21 05:54:00 checking revisions... [ 34.002017] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:54:00 testing simple program... [ 34.051631] cgroup: Unknown subsys name 'net' [ 34.105467] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:53:59 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff81895fb2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880196de5c0 RSP=ffff888015817ac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000008000 R14=ffffffff856f0da0 R15=ffff888015817c48 RIP=ffffffff814c0250 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 00007fde857dc900 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=00007fff36364000 CR3=0000000019e70000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb1261342d0 CR3=0000000016ffa000 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=33353a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343736 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000