syzkaller login: [ 58.994247] BUG: Bad rss-counter state mm:00000000d1a47a24 type:MM_FILEPAGES val:33 [ 58.995393] BUG: Bad rss-counter state mm:00000000d1a47a24 type:MM_ANONPAGES val:22 [ 59.160677] ================================================================== [ 59.161689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.162726] Read of size 8 at addr ffff88800b833d08 by task sshd/219 [ 59.163646] [ 59.163885] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 59.164997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.166073] Call Trace: [ 59.166430] [ 59.166748] dump_stack_lvl+0x91/0xf0 [ 59.167286] print_report+0xcc/0x620 [ 59.167823] ? __virt_addr_valid+0x102/0x340 [ 59.168429] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.169144] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.169822] kasan_report+0xbe/0xf0 [ 59.170345] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.171035] vma_interval_tree_remove+0xc75/0xec0 [ 59.171697] vma_prepare+0xc54/0x11a0 [ 59.172223] __split_vma+0x5af/0x950 [ 59.172749] ? __pfx___split_vma+0x10/0x10 [ 59.173349] ? find_held_lock+0x2c/0x110 [ 59.173926] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.174577] ? lock_is_held_type+0x9f/0x120 [ 59.175196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.175896] ? mtree_range_walk+0x632/0x900 [ 59.176530] ? mas_walk+0x5c7/0x7c0 [ 59.177089] do_vmi_munmap+0x1f1/0x2b0 [ 59.177649] mmap_region+0x1f9/0x2660 [ 59.178210] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.178797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.179616] ? __pfx_lock_acquire+0x10/0x10 [ 59.180236] ? __pfx_mmap_region+0x10/0x10 [ 59.180856] ? security_mmap_addr+0x7d/0xa0 [ 59.181498] ? get_unmapped_area+0x1f5/0x3f0 [ 59.182134] do_mmap+0x854/0xf00 [ 59.182647] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.183210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.183865] ksys_mmap_pgoff+0x3af/0x500 [ 59.184445] do_syscall_64+0x3f/0x90 [ 59.185002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.185730] RIP: 0033:0x7f36b35e1d82 [ 59.186236] 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 [ 59.188579] RSP: 002b:00007ffe71b381e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.189582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36b35e1d82 [ 59.190525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36b2a1b000 [ 59.191458] RBP: 00007f36b2a1b000 R08: 0000000000000009 R09: 0000000000001000 [ 59.192392] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa8acf5f60 [ 59.193331] R13: 00007ffe71b38200 R14: 00007ffe71b38230 R15: 00007ffe71b38590 [ 59.194272] [ 59.194599] [ 59.194835] Allocated by task 212: [ 59.195303] kasan_save_stack+0x22/0x50 [ 59.195860] kasan_set_track+0x25/0x30 [ 59.196399] __kasan_slab_alloc+0x59/0x70 [ 59.196975] kmem_cache_alloc+0x16b/0x370 [ 59.197546] vm_area_dup+0x20/0x160 [ 59.198044] __split_vma+0x170/0x950 [ 59.198562] split_vma+0xc6/0x110 [ 59.199042] mprotect_fixup+0x8d2/0xb30 [ 59.199594] do_mprotect_pkey+0x87e/0xd40 [ 59.200162] __x64_sys_mprotect+0x78/0xc0 [ 59.200730] do_syscall_64+0x3f/0x90 [ 59.201255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.201955] [ 59.202213] Freed by task 212: [ 59.202634] kasan_save_stack+0x22/0x50 [ 59.203180] kasan_set_track+0x25/0x30 [ 59.203707] kasan_save_free_info+0x2b/0x50 [ 59.204284] __kasan_slab_free+0x10a/0x190 [ 59.204863] kmem_cache_free+0x10d/0x4d0 [ 59.205444] rcu_core+0x8c8/0x2860 [ 59.205929] __do_softirq+0x1b7/0x7d4 [ 59.206451] [ 59.206689] Last potentially related work creation: [ 59.207326] kasan_save_stack+0x22/0x50 [ 59.207882] __kasan_record_aux_stack+0x8e/0xa0 [ 59.208516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.209235] remove_vma+0x139/0x170 [ 59.209730] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.210337] do_vmi_munmap+0x1f1/0x2b0 [ 59.210871] __vm_munmap+0x138/0x3a0 [ 59.211382] __x64_sys_munmap+0x59/0x80 [ 59.211924] do_syscall_64+0x3f/0x90 [ 59.212435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.213139] [ 59.213379] The buggy address belongs to the object at ffff88800b833cb0 [ 59.213379] which belongs to the cache vm_area_struct of size 168 [ 59.214969] The buggy address is located 88 bytes inside of [ 59.214969] freed 168-byte region [ffff88800b833cb0, ffff88800b833d58) [ 59.216483] [ 59.216715] The buggy address belongs to the physical page: [ 59.217448] page:00000000108d2375 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb833 [ 59.218592] memcg:ffff88800b834001 [ 59.219057] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.219762] page_type: 0xffffffff() [ 59.220257] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.221271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b834001 [ 59.222256] page dumped because: kasan: bad access detected [ 59.222971] [ 59.223202] Memory state around the buggy address: [ 59.223841] ffff88800b833c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 59.224753] ffff88800b833c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 59.225687] >ffff88800b833d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 59.226607] ^ [ 59.227083] ffff88800b833d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 59.228004] ffff88800b833e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 59.228912] ================================================================== [ 59.230005] Disabling lock debugging due to kernel taint [ 61.249885] BUG: Bad rss-counter state mm:00000000d995631d type:MM_FILEPAGES val:33 [ 61.251061] BUG: Bad rss-counter state mm:00000000d995631d type:MM_ANONPAGES val:22 [ 61.747752] BUG: Bad rss-counter state mm:00000000a19aecec type:MM_FILEPAGES val:33 [ 61.748926] BUG: Bad rss-counter state mm:00000000a19aecec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26303' (ECDSA) to the list of known hosts. 2023/06/19 12:13:05 fuzzer started 2023/06/19 12:13:06 dialing manager at localhost:44161 2023/06/19 12:13:06 checking machine... 2023/06/19 12:13:06 checking revisions... [ 62.494455] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:13:06 testing simple program... [ 62.563269] cgroup: Unknown subsys name 'net' [ 62.662822] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:12:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=0000561f0ab9f790 CR3=000000000e3ee000 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=2035303a33313a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33313a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000020c50 RBX=0000000000000001 RCX=ffffffff81808307 RDX=0000000000020c50 RSI=0000000000008083 RDI=ffffffff86507dd0 RBP=ffff88800ec57400 RSP=ffff88800ec57338 R8 =0000000000000000 R9 =ffff88800ec573e8 R10=0000000000038001 R11=0000000000020c50 R12=ffff88800ec57408 R13=ffff88800ec573f0 R14=ffff88800ec573e9 R15=ffff88800ec573a8 RIP=ffffffff81130837 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 00007f32c653d900 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=00007fffddf81000 CR3=00000000094da000 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