syzkaller login: [ 31.075455] BUG: Bad rss-counter state mm:00000000c01d061a type:MM_FILEPAGES val:33 [ 31.077075] BUG: Bad rss-counter state mm:00000000c01d061a type:MM_ANONPAGES val:22 [ 31.239219] ================================================================== [ 31.240318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.241482] Read of size 8 at addr ffff88801a36b310 by task sshd/221 [ 31.242570] [ 31.242825] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.243829] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.244964] Call Trace: [ 31.245335] [ 31.245700] dump_stack_lvl+0x91/0xf0 [ 31.246282] print_report+0xcc/0x620 [ 31.246793] ? __virt_addr_valid+0x102/0x340 [ 31.247344] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247967] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.248582] kasan_report+0xbe/0xf0 [ 31.249056] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249694] vma_interval_tree_remove+0xc75/0xec0 [ 31.250295] vma_prepare+0xc54/0x11a0 [ 31.250776] __split_vma+0x5af/0x950 [ 31.251243] ? __pfx___split_vma+0x10/0x10 [ 31.251767] ? find_held_lock+0x2c/0x110 [ 31.252282] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.252841] ? lock_is_held_type+0x9f/0x120 [ 31.253392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.254002] ? mtree_range_walk+0x632/0x900 [ 31.254549] ? mas_walk+0x5c7/0x7c0 [ 31.255019] do_vmi_munmap+0x1f1/0x2b0 [ 31.255505] mmap_region+0x1f9/0x2660 [ 31.255982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.256486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.257189] ? __pfx_lock_acquire+0x10/0x10 [ 31.257732] ? __pfx_mmap_region+0x10/0x10 [ 31.258262] ? security_mmap_addr+0x7d/0xa0 [ 31.258792] ? get_unmapped_area+0x1f5/0x3f0 [ 31.259330] do_mmap+0x854/0xf00 [ 31.259771] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.260262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.260815] ksys_mmap_pgoff+0x3af/0x500 [ 31.261315] do_syscall_64+0x3f/0x90 [ 31.261804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262440] RIP: 0033:0x7f3bbbcaad82 [ 31.262893] 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 [ 31.264980] RSP: 002b:00007ffdf8bca348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.265922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bbbcaad82 [ 31.266830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bbb0e4000 [ 31.267676] RBP: 00007f3bbb0e4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.268506] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591403e8f70 [ 31.269337] R13: 00007ffdf8bca360 R14: 00007ffdf8bca390 R15: 00007ffdf8bca6f0 [ 31.270204] [ 31.270495] [ 31.270707] Allocated by task 214: [ 31.271127] kasan_save_stack+0x22/0x50 [ 31.271625] kasan_set_track+0x25/0x30 [ 31.272118] __kasan_slab_alloc+0x59/0x70 [ 31.272640] kmem_cache_alloc+0x16b/0x370 [ 31.273149] vm_area_dup+0x20/0x160 [ 31.273609] __split_vma+0x170/0x950 [ 31.274068] split_vma+0xc6/0x110 [ 31.274504] mprotect_fixup+0x8d2/0xb30 [ 31.275004] do_mprotect_pkey+0x87e/0xd40 [ 31.275517] __x64_sys_mprotect+0x78/0xc0 [ 31.276039] do_syscall_64+0x3f/0x90 [ 31.276511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277143] [ 31.277356] Freed by task 214: [ 31.277764] kasan_save_stack+0x22/0x50 [ 31.278261] kasan_set_track+0x25/0x30 [ 31.278745] kasan_save_free_info+0x2b/0x50 [ 31.279272] __kasan_slab_free+0x10a/0x190 [ 31.279804] kmem_cache_free+0x10d/0x4d0 [ 31.280312] rcu_core+0x8c8/0x2860 [ 31.280751] __do_softirq+0x1b7/0x7d4 [ 31.281223] [ 31.281449] Last potentially related work creation: [ 31.282051] kasan_save_stack+0x22/0x50 [ 31.282556] __kasan_record_aux_stack+0x8e/0xa0 [ 31.283194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.283834] remove_vma+0x139/0x170 [ 31.284286] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.284834] do_vmi_munmap+0x1f1/0x2b0 [ 31.285317] __vm_munmap+0x138/0x3a0 [ 31.285798] __x64_sys_munmap+0x59/0x80 [ 31.286294] do_syscall_64+0x3f/0x90 [ 31.286774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287414] [ 31.287637] The buggy address belongs to the object at ffff88801a36b2b8 [ 31.287637] which belongs to the cache vm_area_struct of size 168 [ 31.289097] The buggy address is located 88 bytes inside of [ 31.289097] freed 168-byte region [ffff88801a36b2b8, ffff88801a36b360) [ 31.290504] [ 31.290717] The buggy address belongs to the physical page: [ 31.291358] page:000000003c64ed9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a36b [ 31.292447] memcg:ffff888016ee8901 [ 31.292881] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.293532] page_type: 0xffffffff() [ 31.293978] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.294878] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ee8901 [ 31.295776] page dumped because: kasan: bad access detected [ 31.296426] [ 31.296639] Memory state around the buggy address: [ 31.297216] ffff88801a36b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.298080] ffff88801a36b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.298927] >ffff88801a36b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.299773] ^ [ 31.300231] ffff88801a36b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.301078] ffff88801a36b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.301921] ================================================================== [ 31.302832] Disabling lock debugging due to kernel taint [ 33.644056] BUG: Bad rss-counter state mm:00000000a3d49876 type:MM_FILEPAGES val:33 [ 33.645198] BUG: Bad rss-counter state mm:00000000a3d49876 type:MM_ANONPAGES val:22 [ 34.036856] BUG: Bad rss-counter state mm:000000007a4df5f5 type:MM_FILEPAGES val:33 [ 34.037916] BUG: Bad rss-counter state mm:000000007a4df5f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46485' (ECDSA) to the list of known hosts. 2023/06/21 04:09:06 fuzzer started 2023/06/21 04:09:07 dialing manager at localhost:36067 2023/06/21 04:09:07 checking machine... 2023/06/21 04:09:07 checking revisions... [ 34.750480] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:09:07 testing simple program... [ 34.804193] cgroup: Unknown subsys name 'net' [ 34.874508] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:06 Registers: info registers vcpu 0 RAX=00007ffe867c7040 RBX=0000000000000000 RCX=0000000000000002 RDX=00007ffe867c7020 RSI=0000000000000025 RDI=000055c8557fff08 RBP=00007ffe867c6e80 RSP=00007ffe867c6928 R8 =0000000000000000 R9 =00007ffe867c6f90 R10=00007ffe867c7390 R11=0000000000000000 R12=00007ffe867c6ea0 R13=000055c8557fff08 R14=00007ffe867c7020 R15=00000000fbad8001 RIP=00007fe061d29700 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe0613ff900 00000000 00000000 GS =0000 0000000000000000 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=00005617250ff748 CR3=000000000c64a000 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=756f6a2f646d65747379732f6e75722f XMM01=00007ffe867c71000000003000000028 XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3c26ecd9ebc4d80900000000000ae988 XMM05=df20aec732c2b6e70000000000132070 XMM06=c291bd5c70af25b90000000000131110 XMM07=fb795ef6d657705600000000001213f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00005617250d93c8 CR3=000000000946e000 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=39303a3430203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732036303a3930 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383334 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000