syzkaller login: [ 31.167736] BUG: Bad rss-counter state mm:000000000d9675bd type:MM_FILEPAGES val:33 [ 31.169158] BUG: Bad rss-counter state mm:000000000d9675bd type:MM_ANONPAGES val:22 [ 31.323908] ================================================================== [ 31.324880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.325794] Read of size 8 at addr ffff88800dd82140 by task sshd/220 [ 31.326644] [ 31.326858] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.327695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.328666] Call Trace: [ 31.328976] [ 31.329251] dump_stack_lvl+0x91/0xf0 [ 31.329730] print_report+0xcc/0x620 [ 31.330199] ? __virt_addr_valid+0x102/0x340 [ 31.330743] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331342] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331957] kasan_report+0xbe/0xf0 [ 31.332426] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.333033] vma_interval_tree_remove+0xc75/0xec0 [ 31.333615] vma_prepare+0xc54/0x11a0 [ 31.334079] __split_vma+0x5af/0x950 [ 31.334536] ? __pfx___split_vma+0x10/0x10 [ 31.335050] ? find_held_lock+0x2c/0x110 [ 31.335562] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.336124] ? lock_is_held_type+0x9f/0x120 [ 31.336650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.337239] ? mtree_range_walk+0x632/0x900 [ 31.337778] ? mas_walk+0x5c7/0x7c0 [ 31.338243] do_vmi_munmap+0x1f1/0x2b0 [ 31.338720] mmap_region+0x1f9/0x2660 [ 31.339190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.339689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.340387] ? __pfx_lock_acquire+0x10/0x10 [ 31.340906] ? __pfx_mmap_region+0x10/0x10 [ 31.341424] ? security_mmap_addr+0x7d/0xa0 [ 31.341938] ? get_unmapped_area+0x1f5/0x3f0 [ 31.342473] do_mmap+0x854/0xf00 [ 31.342905] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.343387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.343951] ksys_mmap_pgoff+0x3af/0x500 [ 31.344445] do_syscall_64+0x3f/0x90 [ 31.344914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.345545] RIP: 0033:0x7fbec9e68d82 [ 31.345990] 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 [ 31.348059] RSP: 002b:00007ffde18eea98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.348939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbec9e68d82 [ 31.349767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbec92a2000 [ 31.350594] RBP: 00007fbec92a2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.351421] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557cb9730ec0 [ 31.352248] R13: 00007ffde18eeab0 R14: 00007ffde18eeae0 R15: 00007ffde18eee40 [ 31.353087] [ 31.353373] [ 31.353585] Allocated by task 213: [ 31.354000] kasan_save_stack+0x22/0x50 [ 31.354492] kasan_set_track+0x25/0x30 [ 31.354975] __kasan_slab_alloc+0x59/0x70 [ 31.355484] kmem_cache_alloc+0x16b/0x370 [ 31.356000] vm_area_dup+0x20/0x160 [ 31.356443] __split_vma+0x170/0x950 [ 31.356904] split_vma+0xc6/0x110 [ 31.357329] mprotect_fixup+0x8d2/0xb30 [ 31.357819] do_mprotect_pkey+0x87e/0xd40 [ 31.358327] __x64_sys_mprotect+0x78/0xc0 [ 31.358832] do_syscall_64+0x3f/0x90 [ 31.359293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.359925] [ 31.360139] Freed by task 213: [ 31.360524] kasan_save_stack+0x22/0x50 [ 31.361018] kasan_set_track+0x25/0x30 [ 31.361500] kasan_save_free_info+0x2b/0x50 [ 31.362016] __kasan_slab_free+0x10a/0x190 [ 31.362537] kmem_cache_free+0x10d/0x4d0 [ 31.363035] rcu_core+0x8c8/0x2860 [ 31.363470] __do_softirq+0x1b7/0x7d4 [ 31.363948] [ 31.364158] Last potentially related work creation: [ 31.364734] kasan_save_stack+0x22/0x50 [ 31.365229] __kasan_record_aux_stack+0x8e/0xa0 [ 31.365792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366417] remove_vma+0x139/0x170 [ 31.366859] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.367400] do_vmi_munmap+0x1f1/0x2b0 [ 31.367886] __vm_munmap+0x138/0x3a0 [ 31.368346] __x64_sys_munmap+0x59/0x80 [ 31.368833] do_syscall_64+0x3f/0x90 [ 31.369296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.369926] [ 31.370138] Second to last potentially related work creation: [ 31.370824] kasan_save_stack+0x22/0x50 [ 31.371323] __kasan_record_aux_stack+0x8e/0xa0 [ 31.371908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.372542] remove_vma+0x139/0x170 [ 31.372987] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.373538] do_vmi_munmap+0x1f1/0x2b0 [ 31.374017] mmap_region+0x1f9/0x2660 [ 31.374487] do_mmap+0x854/0xf00 [ 31.374912] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.375390] ksys_mmap_pgoff+0x3af/0x500 [ 31.375917] do_syscall_64+0x3f/0x90 [ 31.376386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377026] [ 31.377239] The buggy address belongs to the object at ffff88800dd820e8 [ 31.377239] which belongs to the cache vm_area_struct of size 168 [ 31.378676] The buggy address is located 88 bytes inside of [ 31.378676] freed 168-byte region [ffff88800dd820e8, ffff88800dd82190) [ 31.380079] [ 31.380293] The buggy address belongs to the physical page: [ 31.380941] page:000000002372a199 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd82 [ 31.382001] memcg:ffff88800d4b1b01 [ 31.382421] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.383116] page_type: 0xffffffff() [ 31.383558] raw: 0100000000000200 ffff8880087a0c80 ffffea0000396d40 dead000000000003 [ 31.384481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4b1b01 [ 31.385378] page dumped because: kasan: bad access detected [ 31.386020] [ 31.386230] Memory state around the buggy address: [ 31.386801] ffff88800dd82000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.387635] ffff88800dd82080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.388487] >ffff88800dd82100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.389312] ^ [ 31.389937] ffff88800dd82180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.390768] ffff88800dd82200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.391595] ================================================================== [ 31.392907] Disabling lock debugging due to kernel taint [ 33.248742] BUG: Bad rss-counter state mm:000000003bac9870 type:MM_FILEPAGES val:33 [ 33.249935] BUG: Bad rss-counter state mm:000000003bac9870 type:MM_ANONPAGES val:22 [ 33.618679] BUG: Bad rss-counter state mm:00000000ebf095e6 type:MM_FILEPAGES val:33 [ 33.619955] BUG: Bad rss-counter state mm:00000000ebf095e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19986' (ECDSA) to the list of known hosts. 2023/06/21 07:55:04 fuzzer started 2023/06/21 07:55:04 dialing manager at localhost:36067 2023/06/21 07:55:04 checking machine... 2023/06/21 07:55:04 checking revisions... [ 34.354055] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:55:04 testing simple program... [ 34.404436] cgroup: Unknown subsys name 'net' [ 34.461533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:55:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff85d3d350 RBP=ffffffff84537d61 RSP=ffff88801600feb0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff815342b7 RFL=00000002 [-------] 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 00007efc346b8900 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=00007efc34c6f618 CR3=00000000183da000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8996029140 CR3=000000000cbea000 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=3f917827521f6ba0cd486bb05f5b614f XMM02=000000000011a520eff9b2d0a8fce9cb XMM03=000000000011a5f02c67c8bc2e329bc3 XMM04=7c35f7b578889cc700000000000ae988 XMM05=19e9129bd510f2350000000000132bc0 XMM06=8596e2dc9652a3be0000000000131a28 XMM07=e042d86d42eb936e0000000000121c78 XMM08=4084c9416c7841ba000000000011a5f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000