syzkaller login: [ 31.263285] BUG: Bad rss-counter state mm:00000000b350dfb8 type:MM_FILEPAGES val:33 [ 31.264114] BUG: Bad rss-counter state mm:00000000b350dfb8 type:MM_ANONPAGES val:22 [ 31.294983] ================================================================== [ 31.295847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.296699] Read of size 8 at addr ffff88800c464df0 by task sshd/221 [ 31.297328] [ 31.297487] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.298285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.299048] Call Trace: [ 31.299325] [ 31.299528] dump_stack_lvl+0x91/0xf0 [ 31.299985] print_report+0xcc/0x620 [ 31.300401] ? __virt_addr_valid+0x102/0x340 [ 31.300837] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301304] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301787] kasan_report+0xbe/0xf0 [ 31.302170] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.302780] vma_interval_tree_remove+0xc75/0xec0 [ 31.303273] vma_prepare+0xc54/0x11a0 [ 31.303647] __split_vma+0x5af/0x950 [ 31.304030] ? __pfx___split_vma+0x10/0x10 [ 31.304453] ? find_held_lock+0x2c/0x110 [ 31.304926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.305384] ? lock_is_held_type+0x9f/0x120 [ 31.305840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.306330] ? mtree_range_walk+0x632/0x900 [ 31.306833] ? mas_walk+0x5c7/0x7c0 [ 31.307235] do_vmi_munmap+0x1f1/0x2b0 [ 31.307648] mmap_region+0x1f9/0x2660 [ 31.308046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.308485] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.309097] ? __pfx_lock_acquire+0x10/0x10 [ 31.309530] ? __pfx_mmap_region+0x10/0x10 [ 31.309993] ? security_mmap_addr+0x7d/0xa0 [ 31.310448] ? get_unmapped_area+0x1f5/0x3f0 [ 31.310932] do_mmap+0x854/0xf00 [ 31.311235] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.311573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.311955] ksys_mmap_pgoff+0x3af/0x500 [ 31.312275] do_syscall_64+0x3f/0x90 [ 31.312563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313103] RIP: 0033:0x7f7edcb37d82 [ 31.313463] 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 [ 31.314830] RSP: 002b:00007fffe8645248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.315517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7edcb37d82 [ 31.316297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7edbf71000 [ 31.316974] RBP: 00007f7edbf71000 R08: 0000000000000009 R09: 0000000000001000 [ 31.317668] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ea0492ec0 [ 31.318374] R13: 00007fffe8645260 R14: 00007fffe8645290 R15: 00007fffe86455f0 [ 31.319024] [ 31.319235] [ 31.319385] Allocated by task 213: [ 31.319698] kasan_save_stack+0x22/0x50 [ 31.320052] kasan_set_track+0x25/0x30 [ 31.320397] __kasan_slab_alloc+0x59/0x70 [ 31.320794] kmem_cache_alloc+0x16b/0x370 [ 31.321179] vm_area_dup+0x20/0x160 [ 31.321500] __split_vma+0x170/0x950 [ 31.321812] split_vma+0xc6/0x110 [ 31.322096] mprotect_fixup+0x8d2/0xb30 [ 31.322430] do_mprotect_pkey+0x87e/0xd40 [ 31.322758] __x64_sys_mprotect+0x78/0xc0 [ 31.323105] do_syscall_64+0x3f/0x90 [ 31.323426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323870] [ 31.324019] Freed by task 203: [ 31.324289] kasan_save_stack+0x22/0x50 [ 31.324655] kasan_set_track+0x25/0x30 [ 31.325016] kasan_save_free_info+0x2b/0x50 [ 31.325382] __kasan_slab_free+0x10a/0x190 [ 31.325756] kmem_cache_free+0x10d/0x4d0 [ 31.326113] rcu_core+0x8c8/0x2860 [ 31.326429] __do_softirq+0x1b7/0x7d4 [ 31.326750] [ 31.326919] Last potentially related work creation: [ 31.327373] kasan_save_stack+0x22/0x50 [ 31.327707] __kasan_record_aux_stack+0x8e/0xa0 [ 31.328086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.328524] remove_vma+0x139/0x170 [ 31.328832] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.329248] do_vmi_munmap+0x1f1/0x2b0 [ 31.329562] __vm_munmap+0x138/0x3a0 [ 31.329885] __x64_sys_munmap+0x59/0x80 [ 31.330229] do_syscall_64+0x3f/0x90 [ 31.330650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.331184] [ 31.331352] The buggy address belongs to the object at ffff88800c464d98 [ 31.331352] which belongs to the cache vm_area_struct of size 168 [ 31.332428] The buggy address is located 88 bytes inside of [ 31.332428] freed 168-byte region [ffff88800c464d98, ffff88800c464e40) [ 31.333421] [ 31.333580] The buggy address belongs to the physical page: [ 31.334057] page:000000006c20e932 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc464 [ 31.334873] memcg:ffff888018399d01 [ 31.335180] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.335640] page_type: 0xffffffff() [ 31.335973] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.336625] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018399d01 [ 31.337269] page dumped because: kasan: bad access detected [ 31.337748] [ 31.337907] Memory state around the buggy address: [ 31.338327] ffff88800c464c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.338973] ffff88800c464d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.339591] >ffff88800c464d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.340282] ^ [ 31.340863] ffff88800c464e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.341461] ffff88800c464e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.342081] ================================================================== [ 31.342792] Disabling lock debugging due to kernel taint [ 33.493979] BUG: Bad rss-counter state mm:0000000076cb697d type:MM_FILEPAGES val:33 [ 33.495042] BUG: Bad rss-counter state mm:0000000076cb697d type:MM_ANONPAGES val:22 [ 33.949458] BUG: Bad rss-counter state mm:00000000e58ea5a5 type:MM_FILEPAGES val:33 [ 33.950203] BUG: Bad rss-counter state mm:00000000e58ea5a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58071' (ECDSA) to the list of known hosts. 2023/06/20 09:45:57 fuzzer started 2023/06/20 09:45:57 dialing manager at localhost:44161 2023/06/20 09:45:57 checking machine... 2023/06/20 09:45:57 checking revisions... [ 34.509678] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:45:57 testing simple program... [ 34.541096] cgroup: Unknown subsys name 'net' [ 34.594168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:56 Registers: info registers vcpu 0 RAX=1ffff11002cf9f69 RBX=ffff8880167cfb18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880167cfb48 RBP=ffff88800db50b00 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800db65900 R14=ffffffff8186b9c5 R15=ffff88800e116180 RIP=ffffffff81846362 RFL=00000046 [---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 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=00007ffe88924b98 CR3=0000000014180000 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=2036353a35343a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a35343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011caf35 RSI=ffffffff81370a3a RDI=ffff888008e57950 RBP=ffff888008e579a8 RSP=ffff888008e578e0 R8 =0000000000000001 R9 =ffff888008e57990 R10=0000000000038001 R11=0000000000020ed0 R12=ffff888008e57a18 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff888008e57950 RIP=ffffffff8113062c 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 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=00007f8afe471618 CR3=000000000f6aa000 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