syzkaller login: [ 38.745386] BUG: Bad rss-counter state mm:0000000075b212b4 type:MM_FILEPAGES val:33 [ 38.746806] BUG: Bad rss-counter state mm:0000000075b212b4 type:MM_ANONPAGES val:22 [ 38.891496] ================================================================== [ 38.892427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.893363] Read of size 8 at addr ffff88800ea205c8 by task sshd/219 [ 38.894166] [ 38.894391] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.895374] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.896354] Call Trace: [ 38.896677] [ 38.896975] dump_stack_lvl+0x91/0xf0 [ 38.897467] print_report+0xcc/0x620 [ 38.898000] ? __virt_addr_valid+0x102/0x340 [ 38.898556] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899173] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899793] kasan_report+0xbe/0xf0 [ 38.900269] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900896] vma_interval_tree_remove+0xc75/0xec0 [ 38.901501] vma_prepare+0xc54/0x11a0 [ 38.901995] __split_vma+0x5af/0x950 [ 38.902468] ? __pfx___split_vma+0x10/0x10 [ 38.903005] ? find_held_lock+0x2c/0x110 [ 38.903535] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.904109] ? lock_is_held_type+0x9f/0x120 [ 38.904659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.905272] ? mtree_range_walk+0x632/0x900 [ 38.905855] ? mas_walk+0x5c7/0x7c0 [ 38.906333] do_vmi_munmap+0x1f1/0x2b0 [ 38.906830] mmap_region+0x1f9/0x2660 [ 38.907320] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.907831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.908558] ? __pfx_lock_acquire+0x10/0x10 [ 38.909094] ? __pfx_mmap_region+0x10/0x10 [ 38.909654] ? security_mmap_addr+0x7d/0xa0 [ 38.910191] ? get_unmapped_area+0x1f5/0x3f0 [ 38.910742] do_mmap+0x854/0xf00 [ 38.911184] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.911685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.912252] ksys_mmap_pgoff+0x3af/0x500 [ 38.912763] do_syscall_64+0x3f/0x90 [ 38.913245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913910] RIP: 0033:0x7f06f955dd82 [ 38.914372] 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 [ 38.916519] RSP: 002b:00007fff6480bfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.917439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06f955dd82 [ 38.918320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06f8997000 [ 38.919177] RBP: 00007f06f8997000 R08: 0000000000000009 R09: 0000000000001000 [ 38.920035] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe5d3bfec0 [ 38.920904] R13: 00007fff6480bff0 R14: 00007fff6480c020 R15: 00007fff6480c380 [ 38.921780] [ 38.922090] [ 38.922317] Allocated by task 212: [ 38.922756] kasan_save_stack+0x22/0x50 [ 38.923275] kasan_set_track+0x25/0x30 [ 38.923787] __kasan_slab_alloc+0x59/0x70 [ 38.924312] kmem_cache_alloc+0x16b/0x370 [ 38.924832] vm_area_dup+0x20/0x160 [ 38.925282] __split_vma+0x170/0x950 [ 38.925757] split_vma+0xc6/0x110 [ 38.926203] mprotect_fixup+0x8d2/0xb30 [ 38.926706] do_mprotect_pkey+0x87e/0xd40 [ 38.927234] __x64_sys_mprotect+0x78/0xc0 [ 38.927754] do_syscall_64+0x3f/0x90 [ 38.928228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928869] [ 38.929085] Freed by task 19: [ 38.929468] kasan_save_stack+0x22/0x50 [ 38.929993] kasan_set_track+0x25/0x30 [ 38.930485] kasan_save_free_info+0x2b/0x50 [ 38.931022] __kasan_slab_free+0x10a/0x190 [ 38.931552] kmem_cache_free+0x10d/0x4d0 [ 38.932067] rcu_core+0x8c8/0x2860 [ 38.932508] __do_softirq+0x1b7/0x7d4 [ 38.932991] [ 38.933207] Last potentially related work creation: [ 38.933799] kasan_save_stack+0x22/0x50 [ 38.934301] __kasan_record_aux_stack+0x8e/0xa0 [ 38.934876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.935515] remove_vma+0x139/0x170 [ 38.936023] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.936582] do_vmi_munmap+0x1f1/0x2b0 [ 38.937070] __vm_munmap+0x138/0x3a0 [ 38.937541] __x64_sys_munmap+0x59/0x80 [ 38.938068] do_syscall_64+0x3f/0x90 [ 38.938542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939189] [ 38.939403] The buggy address belongs to the object at ffff88800ea20570 [ 38.939403] which belongs to the cache vm_area_struct of size 168 [ 38.940875] The buggy address is located 88 bytes inside of [ 38.940875] freed 168-byte region [ffff88800ea20570, ffff88800ea20618) [ 38.942294] [ 38.942510] The buggy address belongs to the physical page: [ 38.943169] page:000000003ceaf052 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea20 [ 38.944269] memcg:ffff88800db1c701 [ 38.944700] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.945403] page_type: 0xffffffff() [ 38.945872] raw: 0100000000000200 ffff8880087a0c80 ffffea0000515d40 dead000000000003 [ 38.946796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db1c701 [ 38.947709] page dumped because: kasan: bad access detected [ 38.948380] [ 38.948594] Memory state around the buggy address: [ 38.949178] ffff88800ea20480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.950053] ffff88800ea20500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.950904] >ffff88800ea20580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.951765] ^ [ 38.952431] ffff88800ea20600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.953306] ffff88800ea20680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.954162] ================================================================== [ 38.955120] Disabling lock debugging due to kernel taint [ 40.882829] BUG: Bad rss-counter state mm:00000000f012fdf1 type:MM_FILEPAGES val:33 [ 40.884110] BUG: Bad rss-counter state mm:00000000f012fdf1 type:MM_ANONPAGES val:22 [ 41.356552] BUG: Bad rss-counter state mm:000000005c60b551 type:MM_FILEPAGES val:33 [ 41.357757] BUG: Bad rss-counter state mm:000000005c60b551 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1283' (ECDSA) to the list of known hosts. 2023/06/21 07:15:01 fuzzer started 2023/06/21 07:15:01 dialing manager at localhost:36067 2023/06/21 07:15:01 checking machine... 2023/06/21 07:15:01 checking revisions... [ 42.131401] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:15:01 testing simple program... [ 42.183830] cgroup: Unknown subsys name 'net' [ 42.224273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:00 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8612646c RDX=0000000000000008 RSI=ffff8880145bfd38 RDI=ffff8880145bf740 RBP=ffff8880145bf798 RSP=ffff8880145bf6d0 R8 =ffffffff86126470 R9 =ffff8880145bf780 R10=0000000000038001 R11=000000000001dbe6 R12=ffff8880145bf7a0 R13=ffff8880145bf788 R14=ffff8880145bfd40 R15=ffff8880145bf740 RIP=ffffffff81131019 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f42ccf8b900 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=00007f42cc4a9000 CR3=000000000f3c6000 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=b3285ca56c489dff000000000010bae8 XMM01=d59e07bde36eea69000000000011e098 XMM02=ec2efd57dc4c00df000000000011e1a0 XMM03=ecc2fbfcff5e4d93000000000011e270 XMM04=d4fc0c93647b580d00000000000ae988 XMM05=df4a3af814c3ebdc0000000000132df8 XMM06=806171799158d9670000000000131878 XMM07=fb795ef6d65770560000000000121dd8 XMM08=2c67c8bc2e329bc3000000000011e210 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fee79b0 RSP=ffff88800fee7898 R8 =ffffffff86098096 R9 =ffff88800fee7998 R10=0000000000038001 R11=0000000000006097 R12=ffff88800fee79b8 R13=ffff88800fee79a0 R14=ffff88800fee7958 R15=ffff88800fee7958 RIP=ffffffff81131153 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 00007f30ce2ab900 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=00007f30ce862618 CR3=000000000df8e000 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=563412feff00545000000000000080fe 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