syzkaller login: [ 28.882006] BUG: Bad rss-counter state mm:00000000ffb2d66b type:MM_FILEPAGES val:33 [ 28.883256] BUG: Bad rss-counter state mm:00000000ffb2d66b type:MM_ANONPAGES val:22 [ 28.926530] ================================================================== [ 28.927474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.928417] Read of size 8 at addr ffff8880145a9058 by task sshd/220 [ 28.929207] [ 28.929426] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.930294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.931266] Call Trace: [ 28.931585] [ 28.931872] dump_stack_lvl+0x91/0xf0 [ 28.932366] print_report+0xcc/0x620 [ 28.932850] ? __virt_addr_valid+0x102/0x340 [ 28.933405] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.934029] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.934648] kasan_report+0xbe/0xf0 [ 28.935123] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935742] vma_interval_tree_remove+0xc75/0xec0 [ 28.936337] vma_prepare+0xc54/0x11a0 [ 28.936814] __split_vma+0x5af/0x950 [ 28.937284] ? __pfx___split_vma+0x10/0x10 [ 28.937814] ? find_held_lock+0x2c/0x110 [ 28.938356] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.938919] ? lock_is_held_type+0x9f/0x120 [ 28.939459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.940062] ? mtree_range_walk+0x632/0x900 [ 28.940613] ? mas_walk+0x5c7/0x7c0 [ 28.941087] do_vmi_munmap+0x1f1/0x2b0 [ 28.941581] mmap_region+0x1f9/0x2660 [ 28.942069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.942579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.943290] ? __pfx_lock_acquire+0x10/0x10 [ 28.943821] ? __pfx_mmap_region+0x10/0x10 [ 28.944354] ? security_mmap_addr+0x7d/0xa0 [ 28.944880] ? get_unmapped_area+0x1f5/0x3f0 [ 28.945426] do_mmap+0x854/0xf00 [ 28.945869] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.946381] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.946946] ksys_mmap_pgoff+0x3af/0x500 [ 28.947449] do_syscall_64+0x3f/0x90 [ 28.947931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.948584] RIP: 0033:0x7f4d24da0d82 [ 28.949044] 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 [ 28.951179] RSP: 002b:00007ffc90cfc148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.952084] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d24da0d82 [ 28.952936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d241da000 [ 28.953788] RBP: 00007f4d241da000 R08: 0000000000000009 R09: 0000000000001000 [ 28.954653] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d1e330ec0 [ 28.955503] R13: 00007ffc90cfc160 R14: 00007ffc90cfc190 R15: 00007ffc90cfc4f0 [ 28.956361] [ 28.956653] [ 28.956870] Allocated by task 212: [ 28.957302] kasan_save_stack+0x22/0x50 [ 28.957805] kasan_set_track+0x25/0x30 [ 28.958304] __kasan_slab_alloc+0x59/0x70 [ 28.958831] kmem_cache_alloc+0x16b/0x370 [ 28.959353] vm_area_dup+0x20/0x160 [ 28.959812] __split_vma+0x170/0x950 [ 28.960280] split_vma+0xc6/0x110 [ 28.960717] mprotect_fixup+0x8d2/0xb30 [ 28.961223] do_mprotect_pkey+0x87e/0xd40 [ 28.961747] __x64_sys_mprotect+0x78/0xc0 [ 28.962282] do_syscall_64+0x3f/0x90 [ 28.962760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.963403] [ 28.963617] Freed by task 212: [ 28.964013] kasan_save_stack+0x22/0x50 [ 28.964519] kasan_set_track+0x25/0x30 [ 28.965017] kasan_save_free_info+0x2b/0x50 [ 28.965557] __kasan_slab_free+0x10a/0x190 [ 28.966107] kmem_cache_free+0x10d/0x4d0 [ 28.966620] rcu_core+0x8c8/0x2860 [ 28.967066] __do_softirq+0x1b7/0x7d4 [ 28.967550] [ 28.967763] Last potentially related work creation: [ 28.968347] kasan_save_stack+0x22/0x50 [ 28.968848] __kasan_record_aux_stack+0x8e/0xa0 [ 28.969426] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.970080] remove_vma+0x139/0x170 [ 28.970535] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.971093] do_vmi_munmap+0x1f1/0x2b0 [ 28.971700] __vm_munmap+0x138/0x3a0 [ 28.972170] __x64_sys_munmap+0x59/0x80 [ 28.972676] do_syscall_64+0x3f/0x90 [ 28.973157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.973804] [ 28.974036] The buggy address belongs to the object at ffff8880145a9000 [ 28.974036] which belongs to the cache vm_area_struct of size 168 [ 28.975508] The buggy address is located 88 bytes inside of [ 28.975508] freed 168-byte region [ffff8880145a9000, ffff8880145a90a8) [ 28.976918] [ 28.977138] The buggy address belongs to the physical page: [ 28.977793] page:00000000c106ec81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145a9 [ 28.978890] memcg:ffff888009466001 [ 28.979316] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.979962] page_type: 0xffffffff() [ 28.980412] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.981320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009466001 [ 28.982230] page dumped because: kasan: bad access detected [ 28.982895] [ 28.983112] Memory state around the buggy address: [ 28.983691] ffff8880145a8f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.984539] ffff8880145a8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.985387] >ffff8880145a9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.986247] ^ [ 28.986967] ffff8880145a9080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.987821] ffff8880145a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.988662] ================================================================== [ 28.989610] Disabling lock debugging due to kernel taint [ 31.590539] BUG: Bad rss-counter state mm:0000000010697733 type:MM_FILEPAGES val:33 [ 31.591998] BUG: Bad rss-counter state mm:0000000010697733 type:MM_ANONPAGES val:22 [ 32.042868] BUG: Bad rss-counter state mm:00000000f6f57dd0 type:MM_FILEPAGES val:33 [ 32.044065] BUG: Bad rss-counter state mm:00000000f6f57dd0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30109' (ECDSA) to the list of known hosts. 2023/06/20 19:05:32 fuzzer started 2023/06/20 19:05:32 dialing manager at localhost:36067 2023/06/20 19:05:32 checking machine... 2023/06/20 19:05:32 checking revisions... [ 32.729449] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:05:32 testing simple program... [ 32.781083] cgroup: Unknown subsys name 'net' [ 32.832975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:05:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888014691b40 RSI=ffffffff844b7d63 RDI=ffffffff85d3d350 RBP=dffffc0000000000 RSP=ffff88800d987d68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880097a2658 R13=ffff88800d987e70 R14=ffffffffffffffff R15=1ffff11001b30faf RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5d1339c900 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=00007f5d1280dbe0 CR3=000000000c7c2000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=087c8e6408b13eb800000000000ae988 XMM05=8b3b76456644894c0000000000132a88 XMM06=19e9129bd510f2350000000000131940 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888019c9fe30 RCX=1ffff11003393f90 RDX=ffff888016ee1b40 RSI=ffffffff8386bf2d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019c9fd10 R8 =0000000000000005 R9 =00000000fffffff0 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ec9a000 R13=0000000000000000 R14=0000000000000000 R15=ffff888016213980 RIP=ffffffff814c086b RFL=00000292 [--S-A--] 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 00007f921e443900 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=00007f921e9fa618 CR3=000000000fbf8000 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