syzkaller login: [ 38.698044] BUG: Bad rss-counter state mm:00000000efc3e21d type:MM_FILEPAGES val:33 [ 38.699230] BUG: Bad rss-counter state mm:00000000efc3e21d type:MM_ANONPAGES val:22 [ 38.872724] ================================================================== [ 38.873686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.874642] Read of size 8 at addr ffff88800e4bfa50 by task sshd/222 [ 38.875410] [ 38.875634] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.876589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.877557] Call Trace: [ 38.877882] [ 38.878165] dump_stack_lvl+0x91/0xf0 [ 38.878686] print_report+0xcc/0x620 [ 38.879167] ? __virt_addr_valid+0x102/0x340 [ 38.879718] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880336] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880950] kasan_report+0xbe/0xf0 [ 38.881428] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882041] vma_interval_tree_remove+0xc75/0xec0 [ 38.882662] vma_prepare+0xc54/0x11a0 [ 38.883138] __split_vma+0x5af/0x950 [ 38.883606] ? __pfx___split_vma+0x10/0x10 [ 38.884142] ? find_held_lock+0x2c/0x110 [ 38.884664] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.885233] ? lock_is_held_type+0x9f/0x120 [ 38.885780] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.886394] ? mtree_range_walk+0x632/0x900 [ 38.886957] ? mas_walk+0x5c7/0x7c0 [ 38.887430] do_vmi_munmap+0x1f1/0x2b0 [ 38.887932] mmap_region+0x1f9/0x2660 [ 38.888415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.888932] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.889640] ? __pfx_lock_acquire+0x10/0x10 [ 38.890170] ? __pfx_mmap_region+0x10/0x10 [ 38.890728] ? security_mmap_addr+0x7d/0xa0 [ 38.891270] ? get_unmapped_area+0x1f5/0x3f0 [ 38.891825] do_mmap+0x854/0xf00 [ 38.892266] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.892764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.893328] ksys_mmap_pgoff+0x3af/0x500 [ 38.893838] do_syscall_64+0x3f/0x90 [ 38.894327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.894979] RIP: 0033:0x7f2b7eb0fd82 [ 38.895438] 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 [ 38.897593] RSP: 002b:00007fff1a3a83c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.898513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b7eb0fd82 [ 38.899361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b7df49000 [ 38.900216] RBP: 00007f2b7df49000 R08: 0000000000000009 R09: 0000000000001000 [ 38.901059] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607805eaec0 [ 38.901915] R13: 00007fff1a3a83e0 R14: 00007fff1a3a8410 R15: 00007fff1a3a8770 [ 38.902792] [ 38.903084] [ 38.903305] Allocated by task 215: [ 38.903735] kasan_save_stack+0x22/0x50 [ 38.904240] kasan_set_track+0x25/0x30 [ 38.904745] __kasan_slab_alloc+0x59/0x70 [ 38.905275] kmem_cache_alloc+0x16b/0x370 [ 38.905788] vm_area_dup+0x20/0x160 [ 38.906302] __split_vma+0x170/0x950 [ 38.906771] split_vma+0xc6/0x110 [ 38.907217] mprotect_fixup+0x8d2/0xb30 [ 38.907717] do_mprotect_pkey+0x87e/0xd40 [ 38.908250] __x64_sys_mprotect+0x78/0xc0 [ 38.908780] do_syscall_64+0x3f/0x90 [ 38.909258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.909906] [ 38.910125] Freed by task 215: [ 38.910539] kasan_save_stack+0x22/0x50 [ 38.911043] kasan_set_track+0x25/0x30 [ 38.911537] kasan_save_free_info+0x2b/0x50 [ 38.912071] __kasan_slab_free+0x10a/0x190 [ 38.912613] kmem_cache_free+0x10d/0x4d0 [ 38.913124] rcu_core+0x8c8/0x2860 [ 38.913572] __do_softirq+0x1b7/0x7d4 [ 38.914049] [ 38.914275] Last potentially related work creation: [ 38.914860] kasan_save_stack+0x22/0x50 [ 38.915368] __kasan_record_aux_stack+0x8e/0xa0 [ 38.915952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.916600] remove_vma+0x139/0x170 [ 38.917110] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.917674] do_vmi_munmap+0x1f1/0x2b0 [ 38.918157] __vm_munmap+0x138/0x3a0 [ 38.918647] __x64_sys_munmap+0x59/0x80 [ 38.919150] do_syscall_64+0x3f/0x90 [ 38.919626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920280] [ 38.920501] Second to last potentially related work creation: [ 38.921188] kasan_save_stack+0x22/0x50 [ 38.921697] __kasan_record_aux_stack+0x8e/0xa0 [ 38.922278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.922914] remove_vma+0x139/0x170 [ 38.923364] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.923920] do_vmi_munmap+0x1f1/0x2b0 [ 38.924409] mmap_region+0x1f9/0x2660 [ 38.924883] do_mmap+0x854/0xf00 [ 38.925314] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.925801] ksys_mmap_pgoff+0x3af/0x500 [ 38.926331] do_syscall_64+0x3f/0x90 [ 38.926807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927454] [ 38.927667] The buggy address belongs to the object at ffff88800e4bf9f8 [ 38.927667] which belongs to the cache vm_area_struct of size 168 [ 38.929128] The buggy address is located 88 bytes inside of [ 38.929128] freed 168-byte region [ffff88800e4bf9f8, ffff88800e4bfaa0) [ 38.930548] [ 38.930765] The buggy address belongs to the physical page: [ 38.931425] page:00000000f85826e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4bf [ 38.932516] memcg:ffff88800e130001 [ 38.932945] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.933596] page_type: 0xffffffff() [ 38.934045] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.934987] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e130001 [ 38.935925] page dumped because: kasan: bad access detected [ 38.936612] [ 38.936827] Memory state around the buggy address: [ 38.937413] ffff88800e4bf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.938279] ffff88800e4bf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.939128] >ffff88800e4bfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.939979] ^ [ 38.940676] ffff88800e4bfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.941530] ffff88800e4bfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.942399] ================================================================== [ 38.943321] Disabling lock debugging due to kernel taint [ 41.197393] BUG: Bad rss-counter state mm:00000000a5c251e6 type:MM_FILEPAGES val:33 [ 41.198758] BUG: Bad rss-counter state mm:00000000a5c251e6 type:MM_ANONPAGES val:22 [ 41.671408] BUG: Bad rss-counter state mm:000000000bbc22cd type:MM_FILEPAGES val:33 [ 41.672455] BUG: Bad rss-counter state mm:000000000bbc22cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47077' (ECDSA) to the list of known hosts. 2023/06/21 10:45:30 fuzzer started 2023/06/21 10:45:30 dialing manager at localhost:36067 2023/06/21 10:45:30 checking machine... 2023/06/21 10:45:30 checking revisions... [ 42.398277] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:45:30 testing simple program... [ 42.458813] cgroup: Unknown subsys name 'net' [ 42.537977] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:45:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000024 RDX=ffff88801ca47d90 RSI=0000000000000000 RDI=ffff88800daf9500 RBP=ffff88800daf9500 RSP=ffff88801ca47b20 R8 =0000000000000000 R9 =ffffffff83695df0 R10=0000000000000001 R11=0000000000000000 R12=0000000000000024 R13=0000000000000000 R14=ffff88801ca47d90 R15=0000000000000024 RIP=ffffffff83695e82 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 00007fcd1c29e900 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=00007ffe609e4000 CR3=000000000ef82000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f26219c6b00 CR3=000000000c742000 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=82af137d90c8d08bb14c2bba11d44c60 XMM02=000000000011be38ec2efd57dc4c00df XMM03=0000000000122040182219b959bdd840 XMM04=eb52dacf0db0673000000000000ae988 XMM05=59d5b690e0af863b0000000000132f40 XMM06=6ee41fe22b888e490000000000132118 XMM07=e042d86d42eb936e0000000000122318 XMM08=182219b959bdd840000000000011be98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000