syzkaller login: [ 31.750762] BUG: Bad rss-counter state mm:00000000b3615a90 type:MM_FILEPAGES val:33 [ 31.751824] BUG: Bad rss-counter state mm:00000000b3615a90 type:MM_ANONPAGES val:22 [ 31.916226] ================================================================== [ 31.917168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.918162] Read of size 8 at addr ffff88800f2b5d08 by task sshd/219 [ 31.919082] [ 31.919325] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.920232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.921276] Call Trace: [ 31.921616] [ 31.921916] dump_stack_lvl+0x91/0xf0 [ 31.922431] print_report+0xcc/0x620 [ 31.922937] ? __virt_addr_valid+0x102/0x340 [ 31.923540] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.924201] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.924860] kasan_report+0xbe/0xf0 [ 31.925354] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.926005] vma_interval_tree_remove+0xc75/0xec0 [ 31.926636] vma_prepare+0xc54/0x11a0 [ 31.927135] __split_vma+0x5af/0x950 [ 31.927638] ? __pfx___split_vma+0x10/0x10 [ 31.928195] ? find_held_lock+0x2c/0x110 [ 31.928738] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.929330] ? lock_is_held_type+0x9f/0x120 [ 31.929897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.930543] ? mtree_range_walk+0x632/0x900 [ 31.931121] ? mas_walk+0x5c7/0x7c0 [ 31.931628] do_vmi_munmap+0x1f1/0x2b0 [ 31.932142] mmap_region+0x1f9/0x2660 [ 31.932637] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.933177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.933914] ? __pfx_lock_acquire+0x10/0x10 [ 31.934477] ? __pfx_mmap_region+0x10/0x10 [ 31.935033] ? security_mmap_addr+0x7d/0xa0 [ 31.935617] ? get_unmapped_area+0x1f5/0x3f0 [ 31.936197] do_mmap+0x854/0xf00 [ 31.936654] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.937167] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.937756] ksys_mmap_pgoff+0x3af/0x500 [ 31.938284] do_syscall_64+0x3f/0x90 [ 31.938780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.939463] RIP: 0033:0x7f2f4ec2ed82 [ 31.939935] 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 [ 31.942155] RSP: 002b:00007fff3c78da88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.943090] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f4ec2ed82 [ 31.943990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f4e068000 [ 31.944860] RBP: 00007f2f4e068000 R08: 0000000000000009 R09: 0000000000001000 [ 31.945744] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f32eef3ec0 [ 31.946616] R13: 00007fff3c78daa0 R14: 00007fff3c78dad0 R15: 00007fff3c78de30 [ 31.947515] [ 31.947813] [ 31.948040] Allocated by task 212: [ 31.948497] kasan_save_stack+0x22/0x50 [ 31.949036] kasan_set_track+0x25/0x30 [ 31.949560] __kasan_slab_alloc+0x59/0x70 [ 31.950120] kmem_cache_alloc+0x16b/0x370 [ 31.950667] vm_area_dup+0x20/0x160 [ 31.951139] __split_vma+0x170/0x950 [ 31.951646] split_vma+0xc6/0x110 [ 31.952110] mprotect_fixup+0x8d2/0xb30 [ 31.952636] do_mprotect_pkey+0x87e/0xd40 [ 31.953182] __x64_sys_mprotect+0x78/0xc0 [ 31.953735] do_syscall_64+0x3f/0x90 [ 31.954240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.954918] [ 31.955152] Freed by task 212: [ 31.955566] kasan_save_stack+0x22/0x50 [ 31.956101] kasan_set_track+0x25/0x30 [ 31.956618] kasan_save_free_info+0x2b/0x50 [ 31.957189] __kasan_slab_free+0x10a/0x190 [ 31.957745] kmem_cache_free+0x10d/0x4d0 [ 31.958281] rcu_core+0x8c8/0x2860 [ 31.958745] __do_softirq+0x1b7/0x7d4 [ 31.959266] [ 31.959488] Last potentially related work creation: [ 31.960112] kasan_save_stack+0x22/0x50 [ 31.960641] __kasan_record_aux_stack+0x8e/0xa0 [ 31.961236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.961911] remove_vma+0x139/0x170 [ 31.962377] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.962961] do_vmi_munmap+0x1f1/0x2b0 [ 31.963498] __vm_munmap+0x138/0x3a0 [ 31.963988] __x64_sys_munmap+0x59/0x80 [ 31.964507] do_syscall_64+0x3f/0x90 [ 31.964997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.965669] [ 31.965896] The buggy address belongs to the object at ffff88800f2b5cb0 [ 31.965896] which belongs to the cache vm_area_struct of size 168 [ 31.967445] The buggy address is located 88 bytes inside of [ 31.967445] freed 168-byte region [ffff88800f2b5cb0, ffff88800f2b5d58) [ 31.968898] [ 31.969120] The buggy address belongs to the physical page: [ 31.969801] page:00000000f0fab5ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2b5 [ 31.970922] memcg:ffff88800ddd6b01 [ 31.971374] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.972099] page_type: 0xffffffff() [ 31.972559] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.973517] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd6b01 [ 31.974464] page dumped because: kasan: bad access detected [ 31.975168] [ 31.975395] Memory state around the buggy address: [ 31.975991] ffff88800f2b5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.976884] ffff88800f2b5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.977772] >ffff88800f2b5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.978654] ^ [ 31.979109] ffff88800f2b5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.980010] ffff88800f2b5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.980890] ================================================================== [ 31.981906] Disabling lock debugging due to kernel taint [ 33.884642] BUG: Bad rss-counter state mm:0000000090da88c1 type:MM_FILEPAGES val:33 [ 33.885613] BUG: Bad rss-counter state mm:0000000090da88c1 type:MM_ANONPAGES val:22 [ 34.414753] BUG: Bad rss-counter state mm:00000000b65ae151 type:MM_FILEPAGES val:33 [ 34.415889] BUG: Bad rss-counter state mm:00000000b65ae151 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14366' (ECDSA) to the list of known hosts. 2023/06/20 07:14:40 fuzzer started 2023/06/20 07:14:40 dialing manager at localhost:44161 2023/06/20 07:14:40 checking machine... 2023/06/20 07:14:40 checking revisions... [ 35.065520] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:14:40 testing simple program... [ 35.104550] cgroup: Unknown subsys name 'net' [ 35.138190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:14:38 Registers: info registers vcpu 0 RAX=ffffffff815a5cb0 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffffffff852be640 RBP=ffff88801037fd28 RSP=ffff88801037fc60 R8 =0000000000000006 R9 =00000000c000003e R10=0000000040000003 R11=0000000000000000 R12=00000000000000b4 R13=ffff88801037fd60 R14=00000000000000b4 R15=ffffc9000063e0e0 RIP=ffffffff815a5cb4 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 00007fd5fe3d3900 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=00007fd5fd80a2c0 CR3=000000000d592000 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=78e01fa3361c7d0f00000000000ae988 XMM05=c8b89bae89f049df0000000000134f20 XMM06=806171799158d9670000000000133fc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000080150015 RDX=0000000080150014 RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff888018ddfc90 RSP=ffff888018ddfbd0 R8 =0000000080150015 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=ffff8880087b6500 R13=ffff8880199b28d0 R14=ffffea0000666c80 R15=ffff88806cf40d50 RIP=ffffffff818072a6 RFL=00000082 [--S----] 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 00007f8230132900 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=00007f82306e9618 CR3=000000000ebcc000 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