syzkaller login: [ 50.337941] BUG: Bad rss-counter state mm:00000000e9cf35bc type:MM_FILEPAGES val:33 [ 50.339395] BUG: Bad rss-counter state mm:00000000e9cf35bc type:MM_ANONPAGES val:22 [ 50.489410] ================================================================== [ 50.490507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.491526] Read of size 8 at addr ffff88800fd3cb38 by task sshd/227 [ 50.492391] [ 50.492615] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.493487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.494504] Call Trace: [ 50.494827] [ 50.495117] dump_stack_lvl+0x91/0xf0 [ 50.495614] print_report+0xcc/0x620 [ 50.496106] ? __virt_addr_valid+0x102/0x340 [ 50.496659] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.497294] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.497922] kasan_report+0xbe/0xf0 [ 50.498436] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.499063] vma_interval_tree_remove+0xc75/0xec0 [ 50.499683] vma_prepare+0xc54/0x11a0 [ 50.500163] __split_vma+0x5af/0x950 [ 50.500631] ? __pfx___split_vma+0x10/0x10 [ 50.501171] ? find_held_lock+0x2c/0x110 [ 50.501701] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.502294] ? lock_is_held_type+0x9f/0x120 [ 50.502843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.503466] ? mtree_range_walk+0x632/0x900 [ 50.504022] ? mas_walk+0x5c7/0x7c0 [ 50.504500] do_vmi_munmap+0x1f1/0x2b0 [ 50.504992] mmap_region+0x1f9/0x2660 [ 50.505481] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.505996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.506716] ? __pfx_lock_acquire+0x10/0x10 [ 50.507251] ? __pfx_mmap_region+0x10/0x10 [ 50.507787] ? security_mmap_addr+0x7d/0xa0 [ 50.508330] ? get_unmapped_area+0x1f5/0x3f0 [ 50.508896] do_mmap+0x854/0xf00 [ 50.509339] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.509839] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.510431] ksys_mmap_pgoff+0x3af/0x500 [ 50.510954] do_syscall_64+0x3f/0x90 [ 50.511442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.512087] RIP: 0033:0x7f84fb826d82 [ 50.512543] 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 [ 50.514680] RSP: 002b:00007ffc976eb828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.515586] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84fb826d82 [ 50.516435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84fac60000 [ 50.517282] RBP: 00007f84fac60000 R08: 0000000000000009 R09: 0000000000001000 [ 50.518140] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560255b40f70 [ 50.518980] R13: 00007ffc976eb840 R14: 00007ffc976eb870 R15: 00007ffc976ebbd0 [ 50.519828] [ 50.520122] [ 50.520341] Allocated by task 220: [ 50.520769] kasan_save_stack+0x22/0x50 [ 50.521284] kasan_set_track+0x25/0x30 [ 50.521777] __kasan_slab_alloc+0x59/0x70 [ 50.522325] kmem_cache_alloc+0x16b/0x370 [ 50.522850] vm_area_dup+0x20/0x160 [ 50.523301] __split_vma+0x170/0x950 [ 50.523769] split_vma+0xc6/0x110 [ 50.524210] mprotect_fixup+0x8d2/0xb30 [ 50.524723] do_mprotect_pkey+0x87e/0xd40 [ 50.525250] __x64_sys_mprotect+0x78/0xc0 [ 50.525774] do_syscall_64+0x3f/0x90 [ 50.526252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.526898] [ 50.527118] Freed by task 204: [ 50.527513] kasan_save_stack+0x22/0x50 [ 50.528019] kasan_set_track+0x25/0x30 [ 50.528521] kasan_save_free_info+0x2b/0x50 [ 50.529062] __kasan_slab_free+0x10a/0x190 [ 50.529603] kmem_cache_free+0x10d/0x4d0 [ 50.530128] rcu_core+0x8c8/0x2860 [ 50.530580] __do_softirq+0x1b7/0x7d4 [ 50.531074] [ 50.531298] Last potentially related work creation: [ 50.531889] kasan_save_stack+0x22/0x50 [ 50.532417] __kasan_record_aux_stack+0x8e/0xa0 [ 50.533026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.533703] remove_vma+0x139/0x170 [ 50.534182] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.534761] do_vmi_munmap+0x1f1/0x2b0 [ 50.535280] __vm_munmap+0x138/0x3a0 [ 50.535768] __x64_sys_munmap+0x59/0x80 [ 50.536289] do_syscall_64+0x3f/0x90 [ 50.536790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.537461] [ 50.537684] The buggy address belongs to the object at ffff88800fd3cae0 [ 50.537684] which belongs to the cache vm_area_struct of size 168 [ 50.539276] The buggy address is located 88 bytes inside of [ 50.539276] freed 168-byte region [ffff88800fd3cae0, ffff88800fd3cb88) [ 50.540771] [ 50.540996] The buggy address belongs to the physical page: [ 50.541693] page:000000007aa5881d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd3c [ 50.542844] memcg:ffff888019b04e01 [ 50.543285] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.543965] page_type: 0xffffffff() [ 50.544430] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.545413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b04e01 [ 50.546388] page dumped because: kasan: bad access detected [ 50.547082] [ 50.547306] Memory state around the buggy address: [ 50.547912] ffff88800fd3ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.548823] ffff88800fd3ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 50.549710] >ffff88800fd3cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.550631] ^ [ 50.551275] ffff88800fd3cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 50.552188] ffff88800fd3cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 50.553097] ================================================================== [ 50.554139] Disabling lock debugging due to kernel taint [ 52.801566] BUG: Bad rss-counter state mm:000000001680591a type:MM_FILEPAGES val:33 [ 52.803474] BUG: Bad rss-counter state mm:000000001680591a type:MM_ANONPAGES val:22 [ 53.314810] BUG: Bad rss-counter state mm:00000000b5480baa type:MM_FILEPAGES val:33 [ 53.316681] BUG: Bad rss-counter state mm:00000000b5480baa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28850' (ECDSA) to the list of known hosts. 2023/06/19 13:43:08 fuzzer started 2023/06/19 13:43:08 dialing manager at localhost:44161 2023/06/19 13:43:08 checking machine... 2023/06/19 13:43:08 checking revisions... [ 54.076095] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:43:08 testing simple program... [ 54.127448] cgroup: Unknown subsys name 'net' [ 54.164991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:42:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b7b2e RDX=ffff88800dc1f568 RSI=1ffff11001b83eaf RDI=1ffff11001b83eaf RBP=ffff88800dc1f578 RSP=ffff88800dc1f4b0 R8 =ffffffff863b7b32 R9 =ffff88800dc1f560 R10=0000000000038001 R11=000000000008b93b R12=ffff88800dc1f580 R13=ffff88800dc1f568 R14=ffff88800dc1f9c0 R15=ffff88800dc1f520 RIP=ffffffff811310a7 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 00007f5a5a756700 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=00007f313bd73570 CR3=0000000018d34000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36333937342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363339 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=0000000000000000 RBX=1ffff1100287ef72 RCX=0000000000000000 RDX=1ffff11002d29992 RSI=ffffffff81f1061f RDI=ffff88801694cc90 RBP=ffff8880198e5000 RSP=ffff8880143f7b88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801694cc80 R13=0000000000000090 R14=ffff8880143f7bf0 R15=ffff8880196f3f40 RIP=ffffffff81f1066b RFL=00000212 [----A--] 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 00007f9be66ae900 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=00007fff6fb9a000 CR3=000000000ebd2000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000