syzkaller login: [ 33.174255] BUG: Bad rss-counter state mm:00000000adb90b04 type:MM_FILEPAGES val:33 [ 33.175392] BUG: Bad rss-counter state mm:00000000adb90b04 type:MM_ANONPAGES val:22 [ 33.330445] ================================================================== [ 33.331656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.332791] Read of size 8 at addr ffff88800d7dd058 by task sshd/219 [ 33.333734] [ 33.333951] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.334765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.335685] Call Trace: [ 33.335986] [ 33.336254] dump_stack_lvl+0x91/0xf0 [ 33.336722] print_report+0xcc/0x620 [ 33.337185] ? __virt_addr_valid+0x102/0x340 [ 33.337709] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.338293] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.338873] kasan_report+0xbe/0xf0 [ 33.339323] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.339914] vma_interval_tree_remove+0xc75/0xec0 [ 33.340478] vma_prepare+0xc54/0x11a0 [ 33.340960] __split_vma+0x5af/0x950 [ 33.341451] ? __pfx___split_vma+0x10/0x10 [ 33.341987] ? find_held_lock+0x2c/0x110 [ 33.342508] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.343086] ? lock_is_held_type+0x9f/0x120 [ 33.343615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.344216] ? mtree_range_walk+0x632/0x900 [ 33.344780] ? mas_walk+0x5c7/0x7c0 [ 33.345267] do_vmi_munmap+0x1f1/0x2b0 [ 33.345765] mmap_region+0x1f9/0x2660 [ 33.346252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.346769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.347488] ? __pfx_lock_acquire+0x10/0x10 [ 33.348039] ? __pfx_mmap_region+0x10/0x10 [ 33.348568] ? security_mmap_addr+0x7d/0xa0 [ 33.349116] ? get_unmapped_area+0x1f5/0x3f0 [ 33.349671] do_mmap+0x854/0xf00 [ 33.350120] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.350609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.351164] ksys_mmap_pgoff+0x3af/0x500 [ 33.351674] do_syscall_64+0x3f/0x90 [ 33.352150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.352785] RIP: 0033:0x7ff3d3825d82 [ 33.353267] 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 [ 33.355391] RSP: 002b:00007ffe20ef2088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.356312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3d3825d82 [ 33.357176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3d2c5f000 [ 33.358044] RBP: 00007ff3d2c5f000 R08: 0000000000000009 R09: 0000000000001000 [ 33.358905] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b816542980 [ 33.359764] R13: 00007ffe20ef20a0 R14: 00007ffe20ef20d0 R15: 00007ffe20ef2430 [ 33.360636] [ 33.360932] [ 33.361169] Allocated by task 212: [ 33.361615] kasan_save_stack+0x22/0x50 [ 33.362116] kasan_set_track+0x25/0x30 [ 33.362606] __kasan_slab_alloc+0x59/0x70 [ 33.363135] kmem_cache_alloc+0x16b/0x370 [ 33.363663] vm_area_dup+0x20/0x160 [ 33.364126] __split_vma+0x170/0x950 [ 33.364588] split_vma+0xc6/0x110 [ 33.365028] mprotect_fixup+0x8d2/0xb30 [ 33.365545] do_mprotect_pkey+0x87e/0xd40 [ 33.366058] __x64_sys_mprotect+0x78/0xc0 [ 33.366575] do_syscall_64+0x3f/0x90 [ 33.367058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.367698] [ 33.367911] Freed by task 13: [ 33.368302] kasan_save_stack+0x22/0x50 [ 33.368799] kasan_set_track+0x25/0x30 [ 33.369303] kasan_save_free_info+0x2b/0x50 [ 33.369847] __kasan_slab_free+0x10a/0x190 [ 33.370385] kmem_cache_free+0x10d/0x4d0 [ 33.370903] rcu_core+0x8c8/0x2860 [ 33.371352] __do_softirq+0x1b7/0x7d4 [ 33.371828] [ 33.372044] Last potentially related work creation: [ 33.372637] kasan_save_stack+0x22/0x50 [ 33.373150] __kasan_record_aux_stack+0x8e/0xa0 [ 33.373726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.374379] remove_vma+0x139/0x170 [ 33.374837] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.375390] do_vmi_munmap+0x1f1/0x2b0 [ 33.375879] __vm_munmap+0x138/0x3a0 [ 33.376353] __x64_sys_munmap+0x59/0x80 [ 33.376861] do_syscall_64+0x3f/0x90 [ 33.377354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.377994] [ 33.378208] The buggy address belongs to the object at ffff88800d7dd000 [ 33.378208] which belongs to the cache vm_area_struct of size 168 [ 33.379704] The buggy address is located 88 bytes inside of [ 33.379704] freed 168-byte region [ffff88800d7dd000, ffff88800d7dd0a8) [ 33.381124] [ 33.381339] The buggy address belongs to the physical page: [ 33.381994] page:000000009d9451fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7dd [ 33.383099] memcg:ffff88800cfd6101 [ 33.383526] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.384176] page_type: 0xffffffff() [ 33.384636] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.385548] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfd6101 [ 33.386467] page dumped because: kasan: bad access detected [ 33.387136] [ 33.387354] Memory state around the buggy address: [ 33.387946] ffff88800d7dcf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 33.388812] ffff88800d7dcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.389694] >ffff88800d7dd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.390553] ^ [ 33.391297] ffff88800d7dd080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.392159] ffff88800d7dd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.393013] ================================================================== [ 33.394057] Disabling lock debugging due to kernel taint [ 35.538333] BUG: Bad rss-counter state mm:00000000f6d931c6 type:MM_FILEPAGES val:33 [ 35.539427] BUG: Bad rss-counter state mm:00000000f6d931c6 type:MM_ANONPAGES val:22 [ 36.044096] BUG: Bad rss-counter state mm:00000000d5b72636 type:MM_FILEPAGES val:33 [ 36.045329] BUG: Bad rss-counter state mm:00000000d5b72636 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44067' (ECDSA) to the list of known hosts. 2023/06/20 09:18:37 fuzzer started 2023/06/20 09:18:38 dialing manager at localhost:44161 2023/06/20 09:18:38 checking machine... 2023/06/20 09:18:38 checking revisions... [ 36.739405] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:18:38 testing simple program... [ 36.784682] cgroup: Unknown subsys name 'net' [ 36.824795] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:35 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002b13ecc RSP=ffff88801589f630 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=3830306234386136 R12=ffffffff8560b640 R13=ffffffff818d5efc R14=ffffffff87f31af8 R15=ffffffff87f31af8 RIP=ffffffff8180eef9 RFL=00000216 [----AP-] 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 00007f2b9de55900 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=00007f2b9d2920d0 CR3=000000000db92000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=108dfffecc84e58000000000000ae988 XMM05=cedef9a8edae186f0000000000134fd0 XMM06=6658161f7b6d0dc30000000000134078 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a000 RBX=ffff88806cf09b18 RCX=0000000000000001 RDX=ffff88806cf09b20 RSI=ffff88806cf09b08 RDI=ffff88806cf09a80 RBP=ffff88806cf02000 RSP=ffff88806cf099b0 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09b08 R15=ffff88806cf09a70 RIP=ffffffff81131ccc 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 00007fb7598a7700 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=00007f11a328f618 CR3=000000000e620000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34373937352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000