syzkaller login: [ 34.621307] BUG: Bad rss-counter state mm:0000000048097b28 type:MM_FILEPAGES val:33 [ 34.622789] BUG: Bad rss-counter state mm:0000000048097b28 type:MM_ANONPAGES val:22 [ 34.770405] ================================================================== [ 34.771470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.772578] Read of size 8 at addr ffff888015f00058 by task sshd/219 [ 34.773739] [ 34.773997] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.775011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.776100] Call Trace: [ 34.776417] [ 34.776708] dump_stack_lvl+0x91/0xf0 [ 34.777204] print_report+0xcc/0x620 [ 34.777689] ? __virt_addr_valid+0x102/0x340 [ 34.778238] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.778853] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.779468] kasan_report+0xbe/0xf0 [ 34.779942] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.780560] vma_interval_tree_remove+0xc75/0xec0 [ 34.781168] vma_prepare+0xc54/0x11a0 [ 34.781649] __split_vma+0x5af/0x950 [ 34.782128] ? __pfx___split_vma+0x10/0x10 [ 34.782662] ? find_held_lock+0x2c/0x110 [ 34.783178] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.783743] ? lock_is_held_type+0x9f/0x120 [ 34.784280] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.784881] ? mtree_range_walk+0x632/0x900 [ 34.785453] ? mas_walk+0x5c7/0x7c0 [ 34.785927] do_vmi_munmap+0x1f1/0x2b0 [ 34.786423] mmap_region+0x1f9/0x2660 [ 34.786905] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.787414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.788124] ? __pfx_lock_acquire+0x10/0x10 [ 34.788661] ? __pfx_mmap_region+0x10/0x10 [ 34.789205] ? security_mmap_addr+0x7d/0xa0 [ 34.789733] ? get_unmapped_area+0x1f5/0x3f0 [ 34.790294] do_mmap+0x854/0xf00 [ 34.790731] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.791227] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.791784] ksys_mmap_pgoff+0x3af/0x500 [ 34.792291] do_syscall_64+0x3f/0x90 [ 34.792774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.793436] RIP: 0033:0x7f5053740d82 [ 34.793892] 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 [ 34.796021] RSP: 002b:00007ffdfbf23de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.796925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5053740d82 [ 34.797787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5052b7a000 [ 34.798636] RBP: 00007f5052b7a000 R08: 0000000000000009 R09: 0000000000001000 [ 34.799491] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556970f7aec0 [ 34.800346] R13: 00007ffdfbf23e00 R14: 00007ffdfbf23e30 R15: 00007ffdfbf24190 [ 34.801215] [ 34.801509] [ 34.801732] Allocated by task 212: [ 34.802171] kasan_save_stack+0x22/0x50 [ 34.802678] kasan_set_track+0x25/0x30 [ 34.803181] __kasan_slab_alloc+0x59/0x70 [ 34.803719] kmem_cache_alloc+0x16b/0x370 [ 34.804246] vm_area_dup+0x20/0x160 [ 34.804704] __split_vma+0x170/0x950 [ 34.805200] split_vma+0xc6/0x110 [ 34.805653] mprotect_fixup+0x8d2/0xb30 [ 34.806172] do_mprotect_pkey+0x87e/0xd40 [ 34.806711] __x64_sys_mprotect+0x78/0xc0 [ 34.807250] do_syscall_64+0x3f/0x90 [ 34.807734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.808403] [ 34.808623] Freed by task 202: [ 34.809033] kasan_save_stack+0x22/0x50 [ 34.809554] kasan_set_track+0x25/0x30 [ 34.810070] kasan_save_free_info+0x2b/0x50 [ 34.810624] __kasan_slab_free+0x10a/0x190 [ 34.811173] kmem_cache_free+0x10d/0x4d0 [ 34.811696] rcu_core+0x8c8/0x2860 [ 34.812154] __do_softirq+0x1b7/0x7d4 [ 34.812652] [ 34.812873] Last potentially related work creation: [ 34.813496] kasan_save_stack+0x22/0x50 [ 34.814021] __kasan_record_aux_stack+0x8e/0xa0 [ 34.814713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.815383] remove_vma+0x139/0x170 [ 34.815853] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.816430] do_vmi_munmap+0x1f1/0x2b0 [ 34.816929] __vm_munmap+0x138/0x3a0 [ 34.817423] __x64_sys_munmap+0x59/0x80 [ 34.817941] do_syscall_64+0x3f/0x90 [ 34.818428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.819085] [ 34.819306] The buggy address belongs to the object at ffff888015f00000 [ 34.819306] which belongs to the cache vm_area_struct of size 168 [ 34.820828] The buggy address is located 88 bytes inside of [ 34.820828] freed 168-byte region [ffff888015f00000, ffff888015f000a8) [ 34.822299] [ 34.822521] The buggy address belongs to the physical page: [ 34.823202] page:00000000847966b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f00 [ 34.824332] memcg:ffff888015f73c01 [ 34.824772] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.825447] page_type: 0xffffffff() [ 34.825911] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.826868] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f73c01 [ 34.827807] page dumped because: kasan: bad access detected [ 34.828496] [ 34.828721] Memory state around the buggy address: [ 34.829335] ffff888015efff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.830229] ffff888015efff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.831122] >ffff888015f00000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.832001] ^ [ 34.832753] ffff888015f00080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.833661] ffff888015f00100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.834538] ================================================================== [ 34.835489] Disabling lock debugging due to kernel taint [ 36.799057] BUG: Bad rss-counter state mm:0000000054dc48c9 type:MM_FILEPAGES val:33 [ 36.800218] BUG: Bad rss-counter state mm:0000000054dc48c9 type:MM_ANONPAGES val:22 [ 37.154622] BUG: Bad rss-counter state mm:000000006749a27d type:MM_FILEPAGES val:33 [ 37.155682] BUG: Bad rss-counter state mm:000000006749a27d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44976' (ECDSA) to the list of known hosts. 2023/06/19 18:46:16 fuzzer started 2023/06/19 18:46:16 dialing manager at localhost:44161 2023/06/19 18:46:16 checking machine... 2023/06/19 18:46:16 checking revisions... [ 37.905491] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:46:16 testing simple program... [ 37.971623] cgroup: Unknown subsys name 'net' [ 38.045409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:46:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f8f8 RCX=0000000000000001 RDX=1ffff110011aff2a RSI=ffff888008d7fe98 RDI=ffffffff8118d7d9 RBP=ffff888008d7f950 RSP=ffff888008d7f8e0 R8 =0000000000000001 R9 =ffff888008d7f938 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7f9c0 R13=0000000000000000 R14=ffff888008d70000 R15=0000000000000000 RIP=ffffffff811303b2 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 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=00007f5108e800b0 CR3=000000000c654000 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=36343a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303738 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880166f8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880166f7601 RSI=ffff8880166f76f0 RDI=ffff8880166f7708 RBP=ffff8880166f7750 RSP=ffff8880166f7620 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880166f7758 R13=ffff8880166f0000 R14=ffff8880166f76f8 R15=ffff8880166f76f8 RIP=ffffffff811304d1 RFL=00000282 [--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 00007f51088c8900 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=00007fffd4fb0000 CR3=0000000019eb2000 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