syzkaller login: [ 33.606047] BUG: Bad rss-counter state mm:00000000496256ae type:MM_FILEPAGES val:33 [ 33.607568] BUG: Bad rss-counter state mm:00000000496256ae type:MM_ANONPAGES val:22 [ 33.761490] ================================================================== [ 33.762607] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.763802] Read of size 8 at addr ffff888016d7a3f8 by task sshd/220 [ 33.764630] [ 33.764847] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.765712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.766684] Call Trace: [ 33.767027] <TASK> [ 33.767329] dump_stack_lvl+0x91/0xf0 [ 33.767819] print_report+0xcc/0x620 [ 33.768336] ? __virt_addr_valid+0x102/0x340 [ 33.768888] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.769497] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.770117] kasan_report+0xbe/0xf0 [ 33.770624] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.771279] vma_interval_tree_remove+0xc75/0xec0 [ 33.771882] vma_prepare+0xc54/0x11a0 [ 33.772420] __split_vma+0x5af/0x950 [ 33.772894] ? __pfx___split_vma+0x10/0x10 [ 33.773421] ? find_held_lock+0x2c/0x110 [ 33.773945] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.774544] ? lock_is_held_type+0x9f/0x120 [ 33.775103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.775710] ? mtree_range_walk+0x632/0x900 [ 33.776287] ? mas_walk+0x5c7/0x7c0 [ 33.776799] do_vmi_munmap+0x1f1/0x2b0 [ 33.777293] mmap_region+0x1f9/0x2660 [ 33.777781] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.778303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.779071] ? __pfx_lock_acquire+0x10/0x10 [ 33.779608] ? __pfx_mmap_region+0x10/0x10 [ 33.780136] ? security_mmap_addr+0x7d/0xa0 [ 33.780702] ? get_unmapped_area+0x1f5/0x3f0 [ 33.781252] do_mmap+0x854/0xf00 [ 33.781689] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.782187] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.782744] ksys_mmap_pgoff+0x3af/0x500 [ 33.783273] do_syscall_64+0x3f/0x90 [ 33.783759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.784469] RIP: 0033:0x7fc470ba7d82 [ 33.784927] 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 [ 33.787096] RSP: 002b:00007ffd7c9e6918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.788031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc470ba7d82 [ 33.788921] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc46ffe1000 [ 33.789799] RBP: 00007fc46ffe1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.790644] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb46297b20 [ 33.791498] R13: 00007ffd7c9e6930 R14: 00007ffd7c9e6960 R15: 00007ffd7c9e6cc0 [ 33.792419] </TASK> [ 33.792714] [ 33.792933] Allocated by task 212: [ 33.793364] kasan_save_stack+0x22/0x50 [ 33.793902] kasan_set_track+0x25/0x30 [ 33.794392] __kasan_slab_alloc+0x59/0x70 [ 33.794938] kmem_cache_alloc+0x16b/0x370 [ 33.795481] vm_area_dup+0x20/0x160 [ 33.795944] __split_vma+0x170/0x950 [ 33.796448] split_vma+0xc6/0x110 [ 33.796928] mprotect_fixup+0x8d2/0xb30 [ 33.797434] do_mprotect_pkey+0x87e/0xd40 [ 33.797951] __x64_sys_mprotect+0x78/0xc0 [ 33.798481] do_syscall_64+0x3f/0x90 [ 33.799003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.799651] [ 33.799869] Freed by task 203: [ 33.800280] kasan_save_stack+0x22/0x50 [ 33.800823] kasan_set_track+0x25/0x30 [ 33.801318] kasan_save_free_info+0x2b/0x50 [ 33.801860] __kasan_slab_free+0x10a/0x190 [ 33.802418] kmem_cache_free+0x10d/0x4d0 [ 33.802933] rcu_core+0x8c8/0x2860 [ 33.803380] __do_softirq+0x1b7/0x7d4 [ 33.803885] [ 33.804154] Last potentially related work creation: [ 33.804779] kasan_save_stack+0x22/0x50 [ 33.805313] __kasan_record_aux_stack+0x8e/0xa0 [ 33.805883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.806524] remove_vma+0x139/0x170 [ 33.807030] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.807593] do_vmi_munmap+0x1f1/0x2b0 [ 33.808078] __vm_munmap+0x138/0x3a0 [ 33.808579] __x64_sys_munmap+0x59/0x80 [ 33.809114] do_syscall_64+0x3f/0x90 [ 33.809586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.810226] [ 33.810443] The buggy address belongs to the object at ffff888016d7a3a0 [ 33.810443] which belongs to the cache vm_area_struct of size 168 [ 33.811955] The buggy address is located 88 bytes inside of [ 33.811955] freed 168-byte region [ffff888016d7a3a0, ffff888016d7a448) [ 33.813457] [ 33.813679] The buggy address belongs to the physical page: [ 33.814343] page:00000000ef020462 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d7a [ 33.815465] memcg:ffff888013de4401 [ 33.815900] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.816601] page_type: 0xffffffff() [ 33.817061] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.817999] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013de4401 [ 33.818962] page dumped because: kasan: bad access detected [ 33.819631] [ 33.819847] Memory state around the buggy address: [ 33.820476] ffff888016d7a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.821356] ffff888016d7a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.822212] >ffff888016d7a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.823071] ^ [ 33.823931] ffff888016d7a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.824822] ffff888016d7a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.825797] ================================================================== [ 33.826818] Disabling lock debugging due to kernel taint [ 36.090772] BUG: Bad rss-counter state mm:00000000a2f1853d type:MM_FILEPAGES val:33 [ 36.091978] BUG: Bad rss-counter state mm:00000000a2f1853d type:MM_ANONPAGES val:22 [ 36.520047] BUG: Bad rss-counter state mm:0000000039de3be3 type:MM_FILEPAGES val:33 [ 36.521033] BUG: Bad rss-counter state mm:0000000039de3be3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59177' (ECDSA) to the list of known hosts. 2023/06/20 04:03:38 fuzzer started 2023/06/20 04:03:38 dialing manager at localhost:44161 2023/06/20 04:03:38 checking machine... 2023/06/20 04:03:38 checking revisions... [ 37.236538] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:03:38 testing simple program... [ 37.283377] cgroup: Unknown subsys name 'net' [ 37.340213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:03:33 Registers: info registers vcpu 0 RAX=00000015b754f560 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000015 RSI=ffff88806ce28140 RDI=0000000000054570 RBP=ffff88806ce28140 RSP=ffff88806ce09808 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f16ca R11=00000015b704548c R12=0000000000054570 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 0000000000000000 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=00007fff5ee18418 CR3=00000000160b0000 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=2037333a33303a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000000000e5 RCX=0000000000000000 RDX=ffff88800da50000 RSI=00000000000000e5 RDI=ffffffff854f6380 RBP=ffffffff854f6380 RSP=ffff88800da8f858 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=00000000000000e5 R13=0000000000000000 R14=ffff88800da8fb80 R15=ffff88800da50000 RIP=ffffffff814c07e4 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 00007f3c9345a900 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=00007f5d74155650 CR3=000000000c7dc000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f948261c5b3b2f6a00000000000ae988 XMM05=f863bd1c5eae0aa10000000000134680 XMM06=4fda316b135da52b0000000000133470 XMM07=fb795ef6d657705600000000001239b0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000