syzkaller login: [ 30.587406] BUG: Bad rss-counter state mm:0000000028ee6b4c type:MM_FILEPAGES val:33 [ 30.588653] BUG: Bad rss-counter state mm:0000000028ee6b4c type:MM_ANONPAGES val:22 [ 30.631729] ================================================================== [ 30.632740] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.633838] Read of size 8 at addr ffff88801924d4e0 by task sshd/220 [ 30.634680] [ 30.634928] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.635885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.636985] Call Trace: [ 30.637343] <TASK> [ 30.637655] dump_stack_lvl+0x91/0xf0 [ 30.638198] print_report+0xcc/0x620 [ 30.638728] ? __virt_addr_valid+0x102/0x340 [ 30.639340] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.640016] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.640720] kasan_report+0xbe/0xf0 [ 30.641254] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641941] vma_interval_tree_remove+0xc75/0xec0 [ 30.642601] vma_prepare+0xc54/0x11a0 [ 30.643143] __split_vma+0x5af/0x950 [ 30.643653] ? __pfx___split_vma+0x10/0x10 [ 30.644227] ? find_held_lock+0x2c/0x110 [ 30.644799] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.645422] ? lock_is_held_type+0x9f/0x120 [ 30.646036] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.646713] ? mtree_range_walk+0x632/0x900 [ 30.647324] ? mas_walk+0x5c7/0x7c0 [ 30.647848] do_vmi_munmap+0x1f1/0x2b0 [ 30.648390] mmap_region+0x1f9/0x2660 [ 30.648940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.649517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.650295] ? __pfx_lock_acquire+0x10/0x10 [ 30.650900] ? __pfx_mmap_region+0x10/0x10 [ 30.651508] ? security_mmap_addr+0x7d/0xa0 [ 30.652083] ? get_unmapped_area+0x1f5/0x3f0 [ 30.652673] do_mmap+0x854/0xf00 [ 30.653149] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.653680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.654284] ksys_mmap_pgoff+0x3af/0x500 [ 30.654833] do_syscall_64+0x3f/0x90 [ 30.655363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656076] RIP: 0033:0x7f7aec03ed82 [ 30.656609] 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 [ 30.659028] RSP: 002b:00007fffb1328c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.660053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7aec03ed82 [ 30.661026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7aeb478000 [ 30.661996] RBP: 00007f7aeb478000 R08: 0000000000000009 R09: 0000000000001000 [ 30.662960] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561112f77d90 [ 30.663918] R13: 00007fffb1328c60 R14: 00007fffb1328c90 R15: 00007fffb1328ff0 [ 30.664879] </TASK> [ 30.665208] [ 30.665455] Allocated by task 213: [ 30.665950] kasan_save_stack+0x22/0x50 [ 30.666531] kasan_set_track+0x25/0x30 [ 30.667092] __kasan_slab_alloc+0x59/0x70 [ 30.667681] kmem_cache_alloc+0x16b/0x370 [ 30.668261] vm_area_dup+0x20/0x160 [ 30.668788] __split_vma+0x170/0x950 [ 30.669323] split_vma+0xc6/0x110 [ 30.669830] mprotect_fixup+0x8d2/0xb30 [ 30.670402] do_mprotect_pkey+0x87e/0xd40 [ 30.671012] __x64_sys_mprotect+0x78/0xc0 [ 30.671601] do_syscall_64+0x3f/0x90 [ 30.672132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.672856] [ 30.673097] Freed by task 213: [ 30.673548] kasan_save_stack+0x22/0x50 [ 30.674126] kasan_set_track+0x25/0x30 [ 30.674695] kasan_save_free_info+0x2b/0x50 [ 30.675304] __kasan_slab_free+0x10a/0x190 [ 30.675912] kmem_cache_free+0x10d/0x4d0 [ 30.676474] rcu_core+0x8c8/0x2860 [ 30.676963] __do_softirq+0x1b7/0x7d4 [ 30.677497] [ 30.677739] Last potentially related work creation: [ 30.678405] kasan_save_stack+0x22/0x50 [ 30.678992] __kasan_record_aux_stack+0x8e/0xa0 [ 30.679638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.680360] remove_vma+0x139/0x170 [ 30.680871] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.681502] do_vmi_munmap+0x1f1/0x2b0 [ 30.682057] __vm_munmap+0x138/0x3a0 [ 30.682595] __x64_sys_munmap+0x59/0x80 [ 30.683162] do_syscall_64+0x3f/0x90 [ 30.683702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.684428] [ 30.684670] The buggy address belongs to the object at ffff88801924d488 [ 30.684670] which belongs to the cache vm_area_struct of size 168 [ 30.686360] The buggy address is located 88 bytes inside of [ 30.686360] freed 168-byte region [ffff88801924d488, ffff88801924d530) [ 30.687989] [ 30.688234] The buggy address belongs to the physical page: [ 30.688993] page:0000000001d08cea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1924d [ 30.690235] memcg:ffff88800fbf7101 [ 30.690721] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.691464] page_type: 0xffffffff() [ 30.691977] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.693023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbf7101 [ 30.694056] page dumped because: kasan: bad access detected [ 30.694825] [ 30.695078] Memory state around the buggy address: [ 30.695750] ffff88801924d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.696735] ffff88801924d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.697721] >ffff88801924d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.698706] ^ [ 30.699596] ffff88801924d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.700590] ffff88801924d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.701575] ================================================================== [ 30.702677] Disabling lock debugging due to kernel taint [ 32.578257] BUG: Bad rss-counter state mm:000000005770bc24 type:MM_FILEPAGES val:33 [ 32.579335] BUG: Bad rss-counter state mm:000000005770bc24 type:MM_ANONPAGES val:22 [ 33.058161] BUG: Bad rss-counter state mm:0000000038fd8fe7 type:MM_FILEPAGES val:33 [ 33.060054] BUG: Bad rss-counter state mm:0000000038fd8fe7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39624' (ECDSA) to the list of known hosts. 2023/06/20 10:54:45 fuzzer started 2023/06/20 10:54:45 dialing manager at localhost:36067 2023/06/20 10:54:45 checking machine... 2023/06/20 10:54:45 checking revisions... [ 33.798976] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:54:45 testing simple program... [ 33.845363] cgroup: Unknown subsys name 'net' [ 33.882336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:54:44 Registers: info registers vcpu 0 RAX=ffffffff83641ca8 RBX=ffffffff85fa5948 RCX=ffffffff83641c43 RDX=0000000000000000 RSI=ffffffff863b4448 RDI=ffffffff85fa5944 RBP=ffffffff85fa5944 RSP=ffff88806ce099e0 R8 =ffffffff863b4448 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008abe0 R12=ffffffff85fa5944 R13=ffffffff85fa5944 R14=ffffffff85fa5944 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000293 [--S-A-C] 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 00007f64d741c900 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=00007f64d68156c0 CR3=000000000c832000 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=a5c8d3bb918ec4a1544cfdf810daa148 XMM02=ec2efd57dc4c00df000000000011a268 XMM03=c64b6b71a191f24d000000000011a338 XMM04=deaa5bfbc3b0679000000000000ae988 XMM05=69f15f53eb697c3f0000000000132b18 XMM06=4fda316b135da52b0000000000131908 XMM07=fb795ef6d65770560000000000121ba0 XMM08=2c67c8bc2e329bc3000000000011a2d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab1b35 RDI=ffff888015f2ba74 RBP=0000000000000000 RSP=ffff88801c9ef500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000095600000956 R12=0000000000000000 R13=00000000000000bf R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 RFL=00000293 [--S-A-C] 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 00007ff07178c900 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=00007ffc92aa3000 CR3=000000000c5f8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000