syzkaller login: [ 29.754741] BUG: Bad rss-counter state mm:000000002773ee64 type:MM_FILEPAGES val:33 [ 29.755976] BUG: Bad rss-counter state mm:000000002773ee64 type:MM_ANONPAGES val:22 [ 29.798091] ================================================================== [ 29.799091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.800099] Read of size 8 at addr ffff888019b9b058 by task sshd/221 [ 29.800901] [ 29.801122] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.802015] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.803016] Call Trace: [ 29.803344] [ 29.803647] dump_stack_lvl+0x91/0xf0 [ 29.804179] print_report+0xcc/0x620 [ 29.804674] ? __virt_addr_valid+0x102/0x340 [ 29.805240] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.805874] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.806508] kasan_report+0xbe/0xf0 [ 29.807004] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.807638] vma_interval_tree_remove+0xc75/0xec0 [ 29.808278] vma_prepare+0xc54/0x11a0 [ 29.808781] __split_vma+0x5af/0x950 [ 29.809272] ? __pfx___split_vma+0x10/0x10 [ 29.809826] ? find_held_lock+0x2c/0x110 [ 29.810360] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.810936] ? lock_is_held_type+0x9f/0x120 [ 29.811494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.812134] ? mtree_range_walk+0x632/0x900 [ 29.812710] ? mas_walk+0x5c7/0x7c0 [ 29.813201] do_vmi_munmap+0x1f1/0x2b0 [ 29.813717] mmap_region+0x1f9/0x2660 [ 29.814214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.814742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.815479] ? __pfx_lock_acquire+0x10/0x10 [ 29.816043] ? __pfx_mmap_region+0x10/0x10 [ 29.816597] ? security_mmap_addr+0x7d/0xa0 [ 29.817140] ? get_unmapped_area+0x1f5/0x3f0 [ 29.817707] do_mmap+0x854/0xf00 [ 29.818163] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.818687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.819269] ksys_mmap_pgoff+0x3af/0x500 [ 29.819797] do_syscall_64+0x3f/0x90 [ 29.820315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.820979] RIP: 0033:0x7fbe7970dd82 [ 29.821445] 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 [ 29.823640] RSP: 002b:00007fff92d8e238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.824578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe7970dd82 [ 29.825454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe78b47000 [ 29.826323] RBP: 00007fbe78b47000 R08: 0000000000000009 R09: 0000000000001000 [ 29.827221] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db371bbec0 [ 29.828115] R13: 00007fff92d8e250 R14: 00007fff92d8e280 R15: 00007fff92d8e5e0 [ 29.829001] [ 29.829298] [ 29.829522] Allocated by task 214: [ 29.829963] kasan_save_stack+0x22/0x50 [ 29.830486] kasan_set_track+0x25/0x30 [ 29.830995] __kasan_slab_alloc+0x59/0x70 [ 29.831545] kmem_cache_alloc+0x16b/0x370 [ 29.832106] vm_area_dup+0x20/0x160 [ 29.832578] __split_vma+0x170/0x950 [ 29.833070] split_vma+0xc6/0x110 [ 29.833529] mprotect_fixup+0x8d2/0xb30 [ 29.834047] do_mprotect_pkey+0x87e/0xd40 [ 29.834595] __x64_sys_mprotect+0x78/0xc0 [ 29.835129] do_syscall_64+0x3f/0x90 [ 29.835616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.836287] [ 29.836512] Freed by task 214: [ 29.836911] kasan_save_stack+0x22/0x50 [ 29.837437] kasan_set_track+0x25/0x30 [ 29.837945] kasan_save_free_info+0x2b/0x50 [ 29.838505] __kasan_slab_free+0x10a/0x190 [ 29.839060] kmem_cache_free+0x10d/0x4d0 [ 29.839593] rcu_core+0x8c8/0x2860 [ 29.840069] __do_softirq+0x1b7/0x7d4 [ 29.840574] [ 29.840793] Last potentially related work creation: [ 29.841400] kasan_save_stack+0x22/0x50 [ 29.841926] __kasan_record_aux_stack+0x8e/0xa0 [ 29.842532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.843199] remove_vma+0x139/0x170 [ 29.843667] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.844248] do_vmi_munmap+0x1f1/0x2b0 [ 29.844753] __vm_munmap+0x138/0x3a0 [ 29.845240] __x64_sys_munmap+0x59/0x80 [ 29.845755] do_syscall_64+0x3f/0x90 [ 29.846245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.846913] [ 29.847131] The buggy address belongs to the object at ffff888019b9b000 [ 29.847131] which belongs to the cache vm_area_struct of size 168 [ 29.848667] The buggy address is located 88 bytes inside of [ 29.848667] freed 168-byte region [ffff888019b9b000, ffff888019b9b0a8) [ 29.850132] [ 29.850355] The buggy address belongs to the physical page: [ 29.851045] page:00000000e777675e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b9b [ 29.852171] memcg:ffff88800e6fdb01 [ 29.852596] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.853239] page_type: 0xffffffff() [ 29.853686] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.854618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6fdb01 [ 29.855534] page dumped because: kasan: bad access detected [ 29.856212] [ 29.856427] Memory state around the buggy address: [ 29.857009] ffff888019b9af00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 29.857870] ffff888019b9af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.858743] >ffff888019b9b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.859595] ^ [ 29.860370] ffff888019b9b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 29.861247] ffff888019b9b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.862108] ================================================================== [ 29.863472] Disabling lock debugging due to kernel taint [ 31.704362] BUG: Bad rss-counter state mm:00000000313b442e type:MM_FILEPAGES val:33 [ 31.705134] BUG: Bad rss-counter state mm:00000000313b442e type:MM_ANONPAGES val:22 [ 32.280169] BUG: Bad rss-counter state mm:00000000a510ccc5 type:MM_FILEPAGES val:33 [ 32.281361] BUG: Bad rss-counter state mm:00000000a510ccc5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49873' (ECDSA) to the list of known hosts. 2023/06/20 12:22:10 fuzzer started 2023/06/20 12:22:10 dialing manager at localhost:36067 2023/06/20 12:22:10 checking machine... 2023/06/20 12:22:10 checking revisions... [ 32.888841] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:22:11 testing simple program... [ 32.937216] cgroup: Unknown subsys name 'net' [ 33.000196] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:22:10 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff11001ce3f15 RSP=ffff88800e71f8a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=ffff888016b2e768 R15=ffff888016b2e720 RIP=ffffffff812e009a 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 00007fe1e4d0f700 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=00007fbf13007d80 CR3=000000000ef6e000 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=2030313a32323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a32323a3231203032 XMM08=64696720303d64697520612f6e3d6469 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff110031e0ec6 RSI=0000000000000000 RDI=ffff888018f07638 RBP=00007fdeee958b31 RSP=ffff888018f07578 R8 =ffffffff864bbb58 R9 =ffff888018f07628 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888018f07f58 R13=ffff888018f07630 R14=ffff888018f07f58 R15=ffff888018f075e8 RIP=ffffffff81131c60 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 00007fdeee97d900 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=00007ffdc2551000 CR3=00000000198b8000 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