syzkaller login: [ 30.915051] BUG: Bad rss-counter state mm:0000000041a1377e type:MM_FILEPAGES val:33 [ 30.916435] BUG: Bad rss-counter state mm:0000000041a1377e type:MM_ANONPAGES val:22 [ 31.090768] ================================================================== [ 31.091689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.092617] Read of size 8 at addr ffff88800fed4b38 by task sshd/220 [ 31.093401] [ 31.093728] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.094613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.095593] Call Trace: [ 31.095954] [ 31.096239] dump_stack_lvl+0x91/0xf0 [ 31.096731] print_report+0xcc/0x620 [ 31.097213] ? __virt_addr_valid+0x102/0x340 [ 31.097762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.098370] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.098988] kasan_report+0xbe/0xf0 [ 31.099471] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.100100] vma_interval_tree_remove+0xc75/0xec0 [ 31.100702] vma_prepare+0xc54/0x11a0 [ 31.101172] __split_vma+0x5af/0x950 [ 31.101646] ? __pfx___split_vma+0x10/0x10 [ 31.102167] ? find_held_lock+0x2c/0x110 [ 31.102679] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.103234] ? lock_is_held_type+0x9f/0x120 [ 31.103775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.104385] ? mtree_range_walk+0x632/0x900 [ 31.104930] ? mas_walk+0x5c7/0x7c0 [ 31.105398] do_vmi_munmap+0x1f1/0x2b0 [ 31.105883] mmap_region+0x1f9/0x2660 [ 31.106357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.106866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.107574] ? __pfx_lock_acquire+0x10/0x10 [ 31.108121] ? __pfx_mmap_region+0x10/0x10 [ 31.108650] ? security_mmap_addr+0x7d/0xa0 [ 31.109176] ? get_unmapped_area+0x1f5/0x3f0 [ 31.109725] do_mmap+0x854/0xf00 [ 31.110158] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.110651] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.111211] ksys_mmap_pgoff+0x3af/0x500 [ 31.111728] do_syscall_64+0x3f/0x90 [ 31.112201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.112846] RIP: 0033:0x7fe30ce35d82 [ 31.113300] 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 [ 31.115412] RSP: 002b:00007ffdd803c888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.116343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe30ce35d82 [ 31.117201] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe30c26f000 [ 31.118041] RBP: 00007fe30c26f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.118881] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562317ab2d90 [ 31.119729] R13: 00007ffdd803c8a0 R14: 00007ffdd803c8d0 R15: 00007ffdd803cc30 [ 31.120580] [ 31.120871] [ 31.121084] Allocated by task 213: [ 31.121517] kasan_save_stack+0x22/0x50 [ 31.122014] kasan_set_track+0x25/0x30 [ 31.122505] __kasan_slab_alloc+0x59/0x70 [ 31.123021] kmem_cache_alloc+0x16b/0x370 [ 31.123530] vm_area_dup+0x20/0x160 [ 31.123991] __split_vma+0x170/0x950 [ 31.124455] split_vma+0xc6/0x110 [ 31.124892] mprotect_fixup+0x8d2/0xb30 [ 31.125386] do_mprotect_pkey+0x87e/0xd40 [ 31.125900] __x64_sys_mprotect+0x78/0xc0 [ 31.126414] do_syscall_64+0x3f/0x90 [ 31.126889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.127524] [ 31.127759] Freed by task 203: [ 31.128145] kasan_save_stack+0x22/0x50 [ 31.128651] kasan_set_track+0x25/0x30 [ 31.129140] kasan_save_free_info+0x2b/0x50 [ 31.129672] __kasan_slab_free+0x10a/0x190 [ 31.130203] kmem_cache_free+0x10d/0x4d0 [ 31.130707] rcu_core+0x8c8/0x2860 [ 31.131151] __do_softirq+0x1b7/0x7d4 [ 31.131623] [ 31.131845] Last potentially related work creation: [ 31.132428] kasan_save_stack+0x22/0x50 [ 31.132929] __kasan_record_aux_stack+0x8e/0xa0 [ 31.133502] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.134143] remove_vma+0x139/0x170 [ 31.134601] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.135197] do_vmi_munmap+0x1f1/0x2b0 [ 31.135702] __vm_munmap+0x138/0x3a0 [ 31.136169] __x64_sys_munmap+0x59/0x80 [ 31.136667] do_syscall_64+0x3f/0x90 [ 31.137137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137769] [ 31.137982] The buggy address belongs to the object at ffff88800fed4ae0 [ 31.137982] which belongs to the cache vm_area_struct of size 168 [ 31.139457] The buggy address is located 88 bytes inside of [ 31.139457] freed 168-byte region [ffff88800fed4ae0, ffff88800fed4b88) [ 31.140855] [ 31.141070] The buggy address belongs to the physical page: [ 31.141726] page:0000000020794882 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfed4 [ 31.142796] memcg:ffff88800f319c01 [ 31.143223] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.143874] page_type: 0xffffffff() [ 31.144326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.145239] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f319c01 [ 31.146155] page dumped because: kasan: bad access detected [ 31.146821] [ 31.147033] Memory state around the buggy address: [ 31.147614] ffff88800fed4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.148489] ffff88800fed4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.149344] >ffff88800fed4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.150185] ^ [ 31.150792] ffff88800fed4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.151656] ffff88800fed4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.152510] ================================================================== [ 31.153430] Disabling lock debugging due to kernel taint [ 33.480815] BUG: Bad rss-counter state mm:0000000057dbec13 type:MM_FILEPAGES val:33 [ 33.482019] BUG: Bad rss-counter state mm:0000000057dbec13 type:MM_ANONPAGES val:22 [ 33.990059] BUG: Bad rss-counter state mm:00000000f1118d2f type:MM_FILEPAGES val:33 [ 33.991075] BUG: Bad rss-counter state mm:00000000f1118d2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51454' (ECDSA) to the list of known hosts. 2023/06/20 19:51:06 fuzzer started 2023/06/20 19:51:06 dialing manager at localhost:36067 2023/06/20 19:51:06 checking machine... 2023/06/20 19:51:06 checking revisions... [ 34.624054] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:51:06 testing simple program... [ 34.674960] cgroup: Unknown subsys name 'net' [ 34.738034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:51:06 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100333ef04 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff8880199f7810 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d84b8 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000047 [---Z-PC] 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 00007f85f4a14700 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=00007ffd5610a2c8 CR3=000000000dd8e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035303a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323638 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=0000000000000003 RBX=0000000000000002 RCX=ffffffff81809adc RDX=000000000000809a RSI=000000000000809a RDI=ffffffff86509c58 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8113078b 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 00007fbc9d5c3900 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=00007fbc9db7a618 CR3=000000000e780000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000