syzkaller login: [ 44.118314] BUG: Bad rss-counter state mm:000000007a546708 type:MM_FILEPAGES val:33 [ 44.119659] BUG: Bad rss-counter state mm:000000007a546708 type:MM_ANONPAGES val:22 [ 44.303500] ================================================================== [ 44.304501] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.305536] Read of size 8 at addr ffff88800f201d08 by task sshd/219 [ 44.306393] [ 44.306630] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.307701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.308765] Call Trace: [ 44.309123] [ 44.309436] dump_stack_lvl+0x91/0xf0 [ 44.309965] print_report+0xcc/0x620 [ 44.310496] ? __virt_addr_valid+0x102/0x340 [ 44.311092] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.311776] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.312446] kasan_report+0xbe/0xf0 [ 44.312984] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.313657] vma_interval_tree_remove+0xc75/0xec0 [ 44.314311] vma_prepare+0xc54/0x11a0 [ 44.314832] __split_vma+0x5af/0x950 [ 44.315370] ? __pfx___split_vma+0x10/0x10 [ 44.315945] ? find_held_lock+0x2c/0x110 [ 44.316513] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.317120] ? lock_is_held_type+0x9f/0x120 [ 44.317715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.318386] ? mtree_range_walk+0x632/0x900 [ 44.318989] ? mas_walk+0x5c7/0x7c0 [ 44.319516] do_vmi_munmap+0x1f1/0x2b0 [ 44.320052] mmap_region+0x1f9/0x2660 [ 44.320582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.321145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.321922] ? __pfx_lock_acquire+0x10/0x10 [ 44.322517] ? __pfx_mmap_region+0x10/0x10 [ 44.323106] ? security_mmap_addr+0x7d/0xa0 [ 44.323723] ? get_unmapped_area+0x1f5/0x3f0 [ 44.324340] do_mmap+0x854/0xf00 [ 44.324834] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.325383] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.326013] ksys_mmap_pgoff+0x3af/0x500 [ 44.326579] do_syscall_64+0x3f/0x90 [ 44.327114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.327842] RIP: 0033:0x7f5b93089d82 [ 44.328351] 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 [ 44.330699] RSP: 002b:00007ffc4ca63948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.331710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b93089d82 [ 44.332649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b924c3000 [ 44.333588] RBP: 00007f5b924c3000 R08: 0000000000000009 R09: 0000000000001000 [ 44.334525] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624799a9f60 [ 44.335504] R13: 00007ffc4ca63960 R14: 00007ffc4ca63990 R15: 00007ffc4ca63cf0 [ 44.336406] [ 44.336712] [ 44.336945] Allocated by task 212: [ 44.337398] kasan_save_stack+0x22/0x50 [ 44.337926] kasan_set_track+0x25/0x30 [ 44.338450] __kasan_slab_alloc+0x59/0x70 [ 44.339010] kmem_cache_alloc+0x16b/0x370 [ 44.339568] vm_area_dup+0x20/0x160 [ 44.340042] __split_vma+0x170/0x950 [ 44.340540] split_vma+0xc6/0x110 [ 44.341010] mprotect_fixup+0x8d2/0xb30 [ 44.341543] do_mprotect_pkey+0x87e/0xd40 [ 44.342087] __x64_sys_mprotect+0x78/0xc0 [ 44.342641] do_syscall_64+0x3f/0x90 [ 44.343137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.343830] [ 44.344057] Freed by task 203: [ 44.344483] kasan_save_stack+0x22/0x50 [ 44.345026] kasan_set_track+0x25/0x30 [ 44.345560] kasan_save_free_info+0x2b/0x50 [ 44.346124] __kasan_slab_free+0x10a/0x190 [ 44.346694] kmem_cache_free+0x10d/0x4d0 [ 44.347233] rcu_core+0x8c8/0x2860 [ 44.347719] __do_softirq+0x1b7/0x7d4 [ 44.348217] [ 44.348443] Last potentially related work creation: [ 44.349049] kasan_save_stack+0x22/0x50 [ 44.349575] __kasan_record_aux_stack+0x8e/0xa0 [ 44.350185] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.350858] remove_vma+0x139/0x170 [ 44.351349] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.351933] do_vmi_munmap+0x1f1/0x2b0 [ 44.352442] __vm_munmap+0x138/0x3a0 [ 44.352933] __x64_sys_munmap+0x59/0x80 [ 44.353458] do_syscall_64+0x3f/0x90 [ 44.353953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.354633] [ 44.354856] Second to last potentially related work creation: [ 44.355576] kasan_save_stack+0x22/0x50 [ 44.356102] __kasan_record_aux_stack+0x8e/0xa0 [ 44.356703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.357380] remove_vma+0x139/0x170 [ 44.357859] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.358445] do_vmi_munmap+0x1f1/0x2b0 [ 44.358958] mmap_region+0x1f9/0x2660 [ 44.359464] do_mmap+0x854/0xf00 [ 44.359918] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.360429] ksys_mmap_pgoff+0x3af/0x500 [ 44.360953] do_syscall_64+0x3f/0x90 [ 44.361447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.362120] [ 44.362346] The buggy address belongs to the object at ffff88800f201cb0 [ 44.362346] which belongs to the cache vm_area_struct of size 168 [ 44.363898] The buggy address is located 88 bytes inside of [ 44.363898] freed 168-byte region [ffff88800f201cb0, ffff88800f201d58) [ 44.365371] [ 44.365596] The buggy address belongs to the physical page: [ 44.366276] page:0000000088da3996 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf201 [ 44.367400] memcg:ffff88800d6c2201 [ 44.367841] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.368556] page_type: 0xffffffff() [ 44.369019] raw: 0100000000000200 ffff88800879fc80 ffffea00003bbfc0 dead000000000003 [ 44.369960] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6c2201 [ 44.370890] page dumped because: kasan: bad access detected [ 44.371571] [ 44.371794] Memory state around the buggy address: [ 44.372398] ffff88800f201c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.373280] ffff88800f201c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.374159] >ffff88800f201d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.375036] ^ [ 44.375514] ffff88800f201d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 44.376387] ffff88800f201e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 44.377273] ================================================================== [ 44.378292] Disabling lock debugging due to kernel taint [ 46.407282] BUG: Bad rss-counter state mm:0000000023433870 type:MM_FILEPAGES val:33 [ 46.408469] BUG: Bad rss-counter state mm:0000000023433870 type:MM_ANONPAGES val:22 [ 46.844522] BUG: Bad rss-counter state mm:00000000284876b0 type:MM_FILEPAGES val:33 [ 46.845700] BUG: Bad rss-counter state mm:00000000284876b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54392' (ECDSA) to the list of known hosts. 2023/06/19 17:56:45 fuzzer started 2023/06/19 17:56:45 dialing manager at localhost:44161 2023/06/19 17:56:45 checking machine... 2023/06/19 17:56:45 checking revisions... [ 47.555058] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:56:45 testing simple program... [ 47.598749] cgroup: Unknown subsys name 'net' [ 47.655153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015e86780 RCX=ffffffff83677982 RDX=1ffff11003322bd8 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888016fc7918 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888019915ec0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000014 RIP=ffffffff814c0328 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 00007f7c16439900 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=00007f7c169f0618 CR3=0000000019864000 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=563412feff00545000000000000080fe 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f11593c3d00 CR3=000000000ca48000 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=893c53140a92ef85cb460105eacdeb02 XMM02=000000000011d3b0eff9b2d0a8fce9cb XMM03=000000000011d4802c67c8bc2e329bc3 XMM04=09bbb90867dd816100000000000ae988 XMM05=dfcdbad4f1609c3700000000001349d0 XMM06=7cd7a74b7c7154a90000000000133ba8 XMM07=e042d86d42eb936e0000000000124040 XMM08=63b41643170640df000000000011d480 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000