syzkaller login: [ 30.978352] BUG: Bad rss-counter state mm:000000000787d696 type:MM_FILEPAGES val:33 [ 30.979369] BUG: Bad rss-counter state mm:000000000787d696 type:MM_ANONPAGES val:22 [ 31.160549] ================================================================== [ 31.161674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.163022] Read of size 8 at addr ffff8880159b6c20 by task sshd/220 [ 31.163893] [ 31.164138] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.165101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.166197] Call Trace: [ 31.166555] [ 31.166887] dump_stack_lvl+0x91/0xf0 [ 31.167437] print_report+0xcc/0x620 [ 31.167972] ? __virt_addr_valid+0x102/0x340 [ 31.168591] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169273] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169955] kasan_report+0xbe/0xf0 [ 31.170486] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171202] vma_interval_tree_remove+0xc75/0xec0 [ 31.171842] vma_prepare+0xc54/0x11a0 [ 31.172354] __split_vma+0x5af/0x950 [ 31.172857] ? __pfx___split_vma+0x10/0x10 [ 31.173428] ? find_held_lock+0x2c/0x110 [ 31.173980] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.174583] ? lock_is_held_type+0x9f/0x120 [ 31.175165] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.175817] ? mtree_range_walk+0x632/0x900 [ 31.176413] ? mas_walk+0x5c7/0x7c0 [ 31.176919] do_vmi_munmap+0x1f1/0x2b0 [ 31.177442] mmap_region+0x1f9/0x2660 [ 31.177951] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.178493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.179266] ? __pfx_lock_acquire+0x10/0x10 [ 31.179825] ? __pfx_mmap_region+0x10/0x10 [ 31.180379] ? security_mmap_addr+0x7d/0xa0 [ 31.180941] ? get_unmapped_area+0x1f5/0x3f0 [ 31.181524] do_mmap+0x854/0xf00 [ 31.181987] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.182510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.183114] ksys_mmap_pgoff+0x3af/0x500 [ 31.183652] do_syscall_64+0x3f/0x90 [ 31.184162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184842] RIP: 0033:0x7f698c671d82 [ 31.185322] 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 [ 31.187297] RSP: 002b:00007fffa86d22f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.187808] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f698c671d82 [ 31.188263] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f698baab000 [ 31.188722] RBP: 00007f698baab000 R08: 0000000000000009 R09: 0000000000001000 [ 31.189175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbb329cec0 [ 31.189633] R13: 00007fffa86d2310 R14: 00007fffa86d2340 R15: 00007fffa86d26a0 [ 31.190104] [ 31.190263] [ 31.190383] Allocated by task 213: [ 31.190621] kasan_save_stack+0x22/0x50 [ 31.190919] kasan_set_track+0x25/0x30 [ 31.191193] __kasan_slab_alloc+0x59/0x70 [ 31.191489] kmem_cache_alloc+0x16b/0x370 [ 31.191782] vm_area_dup+0x20/0x160 [ 31.192035] __split_vma+0x170/0x950 [ 31.192288] split_vma+0xc6/0x110 [ 31.192526] mprotect_fixup+0x8d2/0xb30 [ 31.192801] do_mprotect_pkey+0x87e/0xd40 [ 31.193089] __x64_sys_mprotect+0x78/0xc0 [ 31.193376] do_syscall_64+0x3f/0x90 [ 31.193659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.194021] [ 31.194141] Freed by task 203: [ 31.194358] kasan_save_stack+0x22/0x50 [ 31.194641] kasan_set_track+0x25/0x30 [ 31.194931] kasan_save_free_info+0x2b/0x50 [ 31.195232] __kasan_slab_free+0x10a/0x190 [ 31.195552] kmem_cache_free+0x10d/0x4d0 [ 31.195960] rcu_core+0x8c8/0x2860 [ 31.196286] __do_softirq+0x1b7/0x7d4 [ 31.196632] [ 31.196789] Last potentially related work creation: [ 31.197205] kasan_save_stack+0x22/0x50 [ 31.197566] __kasan_record_aux_stack+0x8e/0xa0 [ 31.197972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.198431] remove_vma+0x139/0x170 [ 31.198755] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.199148] do_vmi_munmap+0x1f1/0x2b0 [ 31.199490] __vm_munmap+0x138/0x3a0 [ 31.199820] __x64_sys_munmap+0x59/0x80 [ 31.200170] do_syscall_64+0x3f/0x90 [ 31.200512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200963] [ 31.201118] The buggy address belongs to the object at ffff8880159b6bc8 [ 31.201118] which belongs to the cache vm_area_struct of size 168 [ 31.202145] The buggy address is located 88 bytes inside of [ 31.202145] freed 168-byte region [ffff8880159b6bc8, ffff8880159b6c70) [ 31.203145] [ 31.203298] The buggy address belongs to the physical page: [ 31.203760] page:000000000ebe91a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159b6 [ 31.204621] memcg:ffff88801651fd01 [ 31.204839] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.205166] page_type: 0xffffffff() [ 31.205394] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.205865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801651fd01 [ 31.206324] page dumped because: kasan: bad access detected [ 31.206661] [ 31.206778] Memory state around the buggy address: [ 31.207071] ffff8880159b6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.207504] ffff8880159b6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.207940] >ffff8880159b6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.208366] ^ [ 31.208634] ffff8880159b6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.209070] ffff8880159b6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.209507] ================================================================== [ 31.210076] Disabling lock debugging due to kernel taint [ 33.066520] BUG: Bad rss-counter state mm:000000008a498661 type:MM_FILEPAGES val:33 [ 33.067803] BUG: Bad rss-counter state mm:000000008a498661 type:MM_ANONPAGES val:22 [ 33.535055] BUG: Bad rss-counter state mm:0000000087d699a9 type:MM_FILEPAGES val:33 [ 33.535959] BUG: Bad rss-counter state mm:0000000087d699a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63801' (ECDSA) to the list of known hosts. 2023/06/20 14:57:49 fuzzer started 2023/06/20 14:57:49 dialing manager at localhost:36067 2023/06/20 14:57:49 checking machine... 2023/06/20 14:57:49 checking revisions... [ 34.261381] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:57:49 testing simple program... [ 34.310498] cgroup: Unknown subsys name 'net' [ 34.366827] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:57:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f32f4327770 CR3=0000000016bbe000 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=2038343a37353a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37353a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b8c12 RDX=1ffff11002844eb1 RSI=1ffff11002844eaf RDI=ffff888014227588 RBP=ffff888014227578 RSP=ffff8880142274b0 R8 =ffffffff863b8c16 R9 =ffff888014227560 R10=0000000000038001 R11=000000000008b7d7 R12=ffff888014227580 R13=ffff888014227568 R14=ffff8880142279a0 R15=ffff888014227520 RIP=ffffffff811310f5 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 00007ff3ce80d900 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=00007ff3cedc4618 CR3=000000000e9b6000 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=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