syzkaller login: [ 31.160971] BUG: Bad rss-counter state mm:00000000ac94569f type:MM_FILEPAGES val:33 [ 31.162202] BUG: Bad rss-counter state mm:00000000ac94569f type:MM_ANONPAGES val:22 [ 31.323662] ================================================================== [ 31.324577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.325525] Read of size 8 at addr ffff888010291880 by task sshd/218 [ 31.326294] [ 31.326508] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.327490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.328460] Call Trace: [ 31.328794] [ 31.329078] dump_stack_lvl+0x91/0xf0 [ 31.329596] print_report+0xcc/0x620 [ 31.330083] ? __virt_addr_valid+0x102/0x340 [ 31.330648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331880] kasan_report+0xbe/0xf0 [ 31.332353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.332977] vma_interval_tree_remove+0xc75/0xec0 [ 31.333590] vma_prepare+0xc54/0x11a0 [ 31.334064] __split_vma+0x5af/0x950 [ 31.334531] ? __pfx___split_vma+0x10/0x10 [ 31.335048] ? find_held_lock+0x2c/0x110 [ 31.335560] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.336113] ? lock_is_held_type+0x9f/0x120 [ 31.336646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.337264] ? mtree_range_walk+0x632/0x900 [ 31.337814] ? mas_walk+0x5c7/0x7c0 [ 31.338285] do_vmi_munmap+0x1f1/0x2b0 [ 31.338770] mmap_region+0x1f9/0x2660 [ 31.339242] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.339744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.340448] ? __pfx_lock_acquire+0x10/0x10 [ 31.340977] ? __pfx_mmap_region+0x10/0x10 [ 31.341511] ? security_mmap_addr+0x7d/0xa0 [ 31.342040] ? get_unmapped_area+0x1f5/0x3f0 [ 31.342582] do_mmap+0x854/0xf00 [ 31.343017] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.343504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.344066] ksys_mmap_pgoff+0x3af/0x500 [ 31.344571] do_syscall_64+0x3f/0x90 [ 31.345042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.345691] RIP: 0033:0x7f653d829d82 [ 31.346156] 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 [ 31.348253] RSP: 002b:00007fff8ff5a1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.349141] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f653d829d82 [ 31.349996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f653cc63000 [ 31.350831] RBP: 00007f653cc63000 R08: 0000000000000009 R09: 0000000000001000 [ 31.351660] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596331dfec0 [ 31.352498] R13: 00007fff8ff5a1f0 R14: 00007fff8ff5a220 R15: 00007fff8ff5a580 [ 31.353356] [ 31.353642] [ 31.353854] Allocated by task 211: [ 31.354278] kasan_save_stack+0x22/0x50 [ 31.354773] kasan_set_track+0x25/0x30 [ 31.355262] __kasan_slab_alloc+0x59/0x70 [ 31.355778] kmem_cache_alloc+0x16b/0x370 [ 31.356288] vm_area_dup+0x20/0x160 [ 31.356737] __split_vma+0x170/0x950 [ 31.357201] split_vma+0xc6/0x110 [ 31.357656] mprotect_fixup+0x8d2/0xb30 [ 31.358156] do_mprotect_pkey+0x87e/0xd40 [ 31.358670] __x64_sys_mprotect+0x78/0xc0 [ 31.359181] do_syscall_64+0x3f/0x90 [ 31.359650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.360284] [ 31.360500] Freed by task 202: [ 31.360890] kasan_save_stack+0x22/0x50 [ 31.361392] kasan_set_track+0x25/0x30 [ 31.361886] kasan_save_free_info+0x2b/0x50 [ 31.362411] __kasan_slab_free+0x10a/0x190 [ 31.362937] kmem_cache_free+0x10d/0x4d0 [ 31.363442] rcu_core+0x8c8/0x2860 [ 31.363881] __do_softirq+0x1b7/0x7d4 [ 31.364350] [ 31.364562] Last potentially related work creation: [ 31.365141] kasan_save_stack+0x22/0x50 [ 31.365641] __kasan_record_aux_stack+0x8e/0xa0 [ 31.366212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366862] remove_vma+0x139/0x170 [ 31.367320] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.367879] do_vmi_munmap+0x1f1/0x2b0 [ 31.368369] __vm_munmap+0x138/0x3a0 [ 31.368830] __x64_sys_munmap+0x59/0x80 [ 31.369359] do_syscall_64+0x3f/0x90 [ 31.369837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370481] [ 31.370705] The buggy address belongs to the object at ffff888010291828 [ 31.370705] which belongs to the cache vm_area_struct of size 168 [ 31.372174] The buggy address is located 88 bytes inside of [ 31.372174] freed 168-byte region [ffff888010291828, ffff8880102918d0) [ 31.373573] [ 31.373795] The buggy address belongs to the physical page: [ 31.374454] page:0000000065732c10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10291 [ 31.375528] memcg:ffff888019cbd101 [ 31.375951] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.376591] page_type: 0xffffffff() [ 31.377037] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.377953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cbd101 [ 31.378841] page dumped because: kasan: bad access detected [ 31.379490] [ 31.379702] Memory state around the buggy address: [ 31.380279] ffff888010291780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.381131] ffff888010291800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.381990] >ffff888010291880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.382828] ^ [ 31.383235] ffff888010291900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.384077] ffff888010291980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.384920] ================================================================== [ 31.386014] Disabling lock debugging due to kernel taint [ 33.379061] BUG: Bad rss-counter state mm:00000000ecf072a7 type:MM_FILEPAGES val:33 [ 33.380085] BUG: Bad rss-counter state mm:00000000ecf072a7 type:MM_ANONPAGES val:22 [ 33.865839] BUG: Bad rss-counter state mm:00000000d187ad2e type:MM_FILEPAGES val:33 [ 33.866983] BUG: Bad rss-counter state mm:00000000d187ad2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53192' (ECDSA) to the list of known hosts. 2023/06/20 11:04:20 fuzzer started 2023/06/20 11:04:20 dialing manager at localhost:36067 2023/06/20 11:04:20 checking machine... 2023/06/20 11:04:20 checking revisions... [ 34.580217] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:04:20 testing simple program... [ 34.623531] cgroup: Unknown subsys name 'net' [ 34.680760] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=ffff888019f9b680 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002d2ce8a RSP=ffff888016967438 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000ac400000ac4 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f30142a1900 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=00007f3014858618 CR3=0000000016a14000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880090bf0d8 RCX=0000000000000000 RDX=1ffff11001217e1c RSI=ffffffff844f62e5 RDI=ffff8880090bf0e0 RBP=ffff8880090bf0d8 RSP=ffff8880090bf008 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=ffff88801b96d340 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff844f62fe 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 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=00007ffe7bab4e08 CR3=0000000005482000 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=00007f50e06b2510000055b817f2c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000