syzkaller login: [ 30.985645] BUG: Bad rss-counter state mm:00000000d8ac1ed1 type:MM_FILEPAGES val:33 [ 30.986651] BUG: Bad rss-counter state mm:00000000d8ac1ed1 type:MM_ANONPAGES val:22 [ 31.149712] ================================================================== [ 31.150657] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.151597] Read of size 8 at addr ffff88800cc67ed8 by task sshd/220 [ 31.152464] [ 31.152752] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.153661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.154639] Call Trace: [ 31.154969] [ 31.155259] dump_stack_lvl+0x91/0xf0 [ 31.155749] print_report+0xcc/0x620 [ 31.156239] ? __virt_addr_valid+0x102/0x340 [ 31.156797] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157430] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158047] kasan_report+0xbe/0xf0 [ 31.158523] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159148] vma_interval_tree_remove+0xc75/0xec0 [ 31.159754] vma_prepare+0xc54/0x11a0 [ 31.160232] __split_vma+0x5af/0x950 [ 31.160702] ? __pfx___split_vma+0x10/0x10 [ 31.161242] ? find_held_lock+0x2c/0x110 [ 31.161767] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.162336] ? lock_is_held_type+0x9f/0x120 [ 31.162882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.163492] ? mtree_range_walk+0x632/0x900 [ 31.164043] ? mas_walk+0x5c7/0x7c0 [ 31.164520] do_vmi_munmap+0x1f1/0x2b0 [ 31.165009] mmap_region+0x1f9/0x2660 [ 31.165531] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.166048] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.166764] ? __pfx_lock_acquire+0x10/0x10 [ 31.167307] ? __pfx_mmap_region+0x10/0x10 [ 31.167836] ? security_mmap_addr+0x7d/0xa0 [ 31.168370] ? get_unmapped_area+0x1f5/0x3f0 [ 31.168921] do_mmap+0x854/0xf00 [ 31.169369] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.169865] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.170429] ksys_mmap_pgoff+0x3af/0x500 [ 31.170933] do_syscall_64+0x3f/0x90 [ 31.171416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172058] RIP: 0033:0x7fc4d1135d82 [ 31.172519] 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 [ 31.174681] RSP: 002b:00007fff680f3f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.175594] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4d1135d82 [ 31.176446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4d056f000 [ 31.177311] RBP: 00007fc4d056f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.178153] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7014c7b20 [ 31.179023] R13: 00007fff680f3f60 R14: 00007fff680f3f90 R15: 00007fff680f42f0 [ 31.179883] [ 31.180175] [ 31.180390] Allocated by task 213: [ 31.180819] kasan_save_stack+0x22/0x50 [ 31.181334] kasan_set_track+0x25/0x30 [ 31.181830] __kasan_slab_alloc+0x59/0x70 [ 31.182357] kmem_cache_alloc+0x16b/0x370 [ 31.182876] vm_area_dup+0x20/0x160 [ 31.183333] __split_vma+0x170/0x950 [ 31.183799] split_vma+0xc6/0x110 [ 31.184244] mprotect_fixup+0x8d2/0xb30 [ 31.184743] do_mprotect_pkey+0x87e/0xd40 [ 31.185268] __x64_sys_mprotect+0x78/0xc0 [ 31.185791] do_syscall_64+0x3f/0x90 [ 31.186269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186917] [ 31.187133] Freed by task 213: [ 31.187530] kasan_save_stack+0x22/0x50 [ 31.188036] kasan_set_track+0x25/0x30 [ 31.188535] kasan_save_free_info+0x2b/0x50 [ 31.189064] __kasan_slab_free+0x10a/0x190 [ 31.189617] kmem_cache_free+0x10d/0x4d0 [ 31.190129] rcu_core+0x8c8/0x2860 [ 31.190576] __do_softirq+0x1b7/0x7d4 [ 31.191059] [ 31.191277] Last potentially related work creation: [ 31.191865] kasan_save_stack+0x22/0x50 [ 31.192370] __kasan_record_aux_stack+0x8e/0xa0 [ 31.192955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.193676] remove_vma+0x139/0x170 [ 31.194133] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.194686] do_vmi_munmap+0x1f1/0x2b0 [ 31.195179] __vm_munmap+0x138/0x3a0 [ 31.195658] __x64_sys_munmap+0x59/0x80 [ 31.196158] do_syscall_64+0x3f/0x90 [ 31.196630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197313] [ 31.197527] The buggy address belongs to the object at ffff88800cc67e80 [ 31.197527] which belongs to the cache vm_area_struct of size 168 [ 31.199020] The buggy address is located 88 bytes inside of [ 31.199020] freed 168-byte region [ffff88800cc67e80, ffff88800cc67f28) [ 31.200434] [ 31.200655] The buggy address belongs to the physical page: [ 31.201348] page:00000000fea1ab0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc67 [ 31.202446] memcg:ffff888015e57101 [ 31.202880] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.203531] page_type: 0xffffffff() [ 31.203983] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.204917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e57101 [ 31.205836] page dumped because: kasan: bad access detected [ 31.206514] [ 31.206731] Memory state around the buggy address: [ 31.207323] ffff88800cc67d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.208197] ffff88800cc67e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.209067] >ffff88800cc67e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.209973] ^ [ 31.210715] ffff88800cc67f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.211588] ffff88800cc67f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.212445] ================================================================== [ 31.213386] Disabling lock debugging due to kernel taint [ 33.333184] BUG: Bad rss-counter state mm:00000000c06aaf52 type:MM_FILEPAGES val:33 [ 33.334433] BUG: Bad rss-counter state mm:00000000c06aaf52 type:MM_ANONPAGES val:22 [ 33.787086] BUG: Bad rss-counter state mm:000000005fdca1ce type:MM_FILEPAGES val:33 [ 33.788289] BUG: Bad rss-counter state mm:000000005fdca1ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37230' (ECDSA) to the list of known hosts. 2023/06/21 02:03:14 fuzzer started 2023/06/21 02:03:14 dialing manager at localhost:36067 2023/06/21 02:03:14 checking machine... 2023/06/21 02:03:14 checking revisions... [ 34.322865] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:03:15 testing simple program... [ 34.364767] cgroup: Unknown subsys name 'net' [ 34.411756] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:03:14 Registers: info registers vcpu 0 RAX=000000000000001c RBX=000000000000001c RCX=dffffc0000000000 RDX=ffff88800f353680 RSI=ffffffff83723c5c RDI=0000000000000005 RBP=000000000000001d RSP=ffff888016e3f7c0 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99bc0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff83723c82 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 00007f5706ef2900 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=00007f57074a9618 CR3=0000000009ae2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f814c673000 CR3=000000000ee56000 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=7ebe2e2b197490918c40c34fe0b87caa XMM02=2c67c8bc2e329bc3000000000011ab70 XMM03=fb795ef6d65770560000000000121bd0 XMM04=4462f1dc780619cd00000000000ae988 XMM05=19e9129bd510f2350000000000131ab0 XMM06=4fda316b135da52b0000000000131938 XMM07=e042d86d42eb936e0000000000121e50 XMM08=a1fd8fe8ec3bbd87000000000011abd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000