syzkaller login: [ 39.084277] BUG: Bad rss-counter state mm:000000007ec36965 type:MM_FILEPAGES val:33 [ 39.084853] BUG: Bad rss-counter state mm:000000007ec36965 type:MM_ANONPAGES val:22 [ 39.228112] ================================================================== [ 39.228859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.229595] Read of size 8 at addr ffff88800e6444e0 by task sshd/221 [ 39.230187] [ 39.230360] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.231024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.231958] Call Trace: [ 39.232208] [ 39.232429] dump_stack_lvl+0x91/0xf0 [ 39.232814] print_report+0xcc/0x620 [ 39.233190] ? __virt_addr_valid+0x102/0x340 [ 39.233616] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.234360] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.235177] kasan_report+0xbe/0xf0 [ 39.235809] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.236622] vma_interval_tree_remove+0xc75/0xec0 [ 39.237451] vma_prepare+0xc54/0x11a0 [ 39.238096] __split_vma+0x5af/0x950 [ 39.238737] ? __pfx___split_vma+0x10/0x10 [ 39.239453] ? find_held_lock+0x2c/0x110 [ 39.240132] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.240910] ? lock_is_held_type+0x9f/0x120 [ 39.241641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.242455] ? mtree_range_walk+0x632/0x900 [ 39.243192] ? mas_walk+0x5c7/0x7c0 [ 39.243820] do_vmi_munmap+0x1f1/0x2b0 [ 39.244495] mmap_region+0x1f9/0x2660 [ 39.245196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.245617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.246202] ? __pfx_lock_acquire+0x10/0x10 [ 39.246639] ? __pfx_mmap_region+0x10/0x10 [ 39.247072] ? security_mmap_addr+0x7d/0xa0 [ 39.247500] ? get_unmapped_area+0x1f5/0x3f0 [ 39.247945] do_mmap+0x854/0xf00 [ 39.248303] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.248717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.249167] ksys_mmap_pgoff+0x3af/0x500 [ 39.249576] do_syscall_64+0x3f/0x90 [ 39.249959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.250501] RIP: 0033:0x7f344b08bd82 [ 39.250878] 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 [ 39.252609] RSP: 002b:00007fff62748b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.253359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f344b08bd82 [ 39.254054] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f344a4c5000 [ 39.254744] RBP: 00007f344a4c5000 R08: 0000000000000009 R09: 0000000000001000 [ 39.255433] R10: 0000000000000812 R11: 0000000000000206 R12: 000056450630eec0 [ 39.256123] R13: 00007fff62748b80 R14: 00007fff62748bb0 R15: 00007fff62748f10 [ 39.256836] [ 39.257073] [ 39.257245] Allocated by task 212: [ 39.257595] kasan_save_stack+0x22/0x50 [ 39.258010] kasan_set_track+0x25/0x30 [ 39.258413] __kasan_slab_alloc+0x59/0x70 [ 39.258843] kmem_cache_alloc+0x16b/0x370 [ 39.259268] vm_area_dup+0x20/0x160 [ 39.259638] __split_vma+0x170/0x950 [ 39.260016] split_vma+0xc6/0x110 [ 39.260372] mprotect_fixup+0x8d2/0xb30 [ 39.260791] do_mprotect_pkey+0x87e/0xd40 [ 39.261215] __x64_sys_mprotect+0x78/0xc0 [ 39.261635] do_syscall_64+0x3f/0x90 [ 39.262024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.262528] [ 39.262696] Freed by task 19: [ 39.262993] kasan_save_stack+0x22/0x50 [ 39.263382] kasan_set_track+0x25/0x30 [ 39.263764] kasan_save_free_info+0x2b/0x50 [ 39.264174] __kasan_slab_free+0x10a/0x190 [ 39.264588] kmem_cache_free+0x10d/0x4d0 [ 39.264990] rcu_core+0x8c8/0x2860 [ 39.265335] __do_softirq+0x1b7/0x7d4 [ 39.265705] [ 39.265873] Last potentially related work creation: [ 39.266328] kasan_save_stack+0x22/0x50 [ 39.266718] __kasan_record_aux_stack+0x8e/0xa0 [ 39.267165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.267676] remove_vma+0x139/0x170 [ 39.268026] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.268455] do_vmi_munmap+0x1f1/0x2b0 [ 39.268848] __vm_munmap+0x138/0x3a0 [ 39.269216] __x64_sys_munmap+0x59/0x80 [ 39.269601] do_syscall_64+0x3f/0x90 [ 39.269967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.270473] [ 39.270640] Second to last potentially related work creation: [ 39.271172] kasan_save_stack+0x22/0x50 [ 39.271559] __kasan_record_aux_stack+0x8e/0xa0 [ 39.272005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.272502] remove_vma+0x139/0x170 [ 39.272981] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.273415] do_vmi_munmap+0x1f1/0x2b0 [ 39.273792] __vm_munmap+0x138/0x3a0 [ 39.274157] __x64_sys_munmap+0x59/0x80 [ 39.274541] do_syscall_64+0x3f/0x90 [ 39.274913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.275413] [ 39.275584] The buggy address belongs to the object at ffff88800e644488 [ 39.275584] which belongs to the cache vm_area_struct of size 168 [ 39.276747] The buggy address is located 88 bytes inside of [ 39.276747] freed 168-byte region [ffff88800e644488, ffff88800e644530) [ 39.277894] [ 39.278075] The buggy address belongs to the physical page: [ 39.278631] page:00000000513461b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe644 [ 39.279548] memcg:ffff88800c463001 [ 39.279902] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.280495] page_type: 0xffffffff() [ 39.280877] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.281653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c463001 [ 39.282414] page dumped because: kasan: bad access detected [ 39.282969] [ 39.283150] Memory state around the buggy address: [ 39.283636] ffff88800e644380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.284359] ffff88800e644400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.285068] >ffff88800e644480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.285778] ^ [ 39.286409] ffff88800e644500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.287117] ffff88800e644580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.287819] ================================================================== [ 39.288649] Disabling lock debugging due to kernel taint [ 41.888000] BUG: Bad rss-counter state mm:000000000e809ab9 type:MM_FILEPAGES val:33 [ 41.888822] BUG: Bad rss-counter state mm:000000000e809ab9 type:MM_ANONPAGES val:22 [ 42.460032] BUG: Bad rss-counter state mm:00000000d5f85014 type:MM_FILEPAGES val:33 [ 42.461220] BUG: Bad rss-counter state mm:00000000d5f85014 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48495' (ECDSA) to the list of known hosts. 2023/06/19 11:12:25 fuzzer started 2023/06/19 11:12:25 dialing manager at localhost:44161 2023/06/19 11:12:25 checking machine... 2023/06/19 11:12:25 checking revisions... [ 43.035978] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:12:25 testing simple program... [ 43.079906] cgroup: Unknown subsys name 'net' [ 43.117039] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:12:24 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=00000000fffcdd30 RCX=ffffffff81363c6a RDX=0000000000000002 RSI=0000000000000008 RDI=ffffffff85618108 RBP=ffff888008d71b40 RSP=ffff888008d87d60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=0000000000000000 R13=ffff88806ce35000 R14=0000000000000000 R15=ffff888008d71b40 RIP=ffffffff813608e6 RFL=00000002 [-------] 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 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=00007fff9213dff8 CR3=0000000018378000 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=2034323a32313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a32313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001314e13 RBX=ffff8880098a7068 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880098a7098 RBP=ffff8880199c13e0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888019a1fbe8 R14=ffffffff813782a8 R15=ffff888019eb1480 RIP=ffffffff8184636c RFL=00000046 [---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 00007f2425e66900 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=00007fff2dc5d000 CR3=00000000132f8000 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=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