syzkaller login: [ 36.818044] BUG: Bad rss-counter state mm:00000000b92b3b9c type:MM_FILEPAGES val:33 [ 36.819469] BUG: Bad rss-counter state mm:00000000b92b3b9c type:MM_ANONPAGES val:22 [ 36.972141] ================================================================== [ 36.973053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.973982] Read of size 8 at addr ffff88800feda880 by task sshd/220 [ 36.974758] [ 36.975070] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.975979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.976953] Call Trace: [ 36.977284] [ 36.977578] dump_stack_lvl+0x91/0xf0 [ 36.978063] print_report+0xcc/0x620 [ 36.978545] ? __virt_addr_valid+0x102/0x340 [ 36.979092] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.979716] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.980329] kasan_report+0xbe/0xf0 [ 36.980795] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.981412] vma_interval_tree_remove+0xc75/0xec0 [ 36.982016] vma_prepare+0xc54/0x11a0 [ 36.982500] __split_vma+0x5af/0x950 [ 36.982968] ? __pfx___split_vma+0x10/0x10 [ 36.983491] ? find_held_lock+0x2c/0x110 [ 36.984022] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.984584] ? lock_is_held_type+0x9f/0x120 [ 36.985119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.985719] ? mtree_range_walk+0x632/0x900 [ 36.986266] ? mas_walk+0x5c7/0x7c0 [ 36.986735] do_vmi_munmap+0x1f1/0x2b0 [ 36.987224] mmap_region+0x1f9/0x2660 [ 36.987726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.988230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.988945] ? __pfx_lock_acquire+0x10/0x10 [ 36.989479] ? __pfx_mmap_region+0x10/0x10 [ 36.990007] ? security_mmap_addr+0x7d/0xa0 [ 36.990530] ? get_unmapped_area+0x1f5/0x3f0 [ 36.991083] do_mmap+0x854/0xf00 [ 36.991537] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.992034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.992596] ksys_mmap_pgoff+0x3af/0x500 [ 36.993098] do_syscall_64+0x3f/0x90 [ 36.993572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.994217] RIP: 0033:0x7f38e94e9d82 [ 36.994675] 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 [ 36.996812] RSP: 002b:00007ffd7e6f5638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.997716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38e94e9d82 [ 36.998590] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38e8923000 [ 36.999476] RBP: 00007f38e8923000 R08: 0000000000000009 R09: 0000000000001000 [ 37.000360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f3c6ceec0 [ 37.001263] R13: 00007ffd7e6f5650 R14: 00007ffd7e6f5680 R15: 00007ffd7e6f59e0 [ 37.002152] [ 37.002453] [ 37.002672] Allocated by task 213: [ 37.003112] kasan_save_stack+0x22/0x50 [ 37.003646] kasan_set_track+0x25/0x30 [ 37.004152] __kasan_slab_alloc+0x59/0x70 [ 37.004692] kmem_cache_alloc+0x16b/0x370 [ 37.005221] vm_area_dup+0x20/0x160 [ 37.005688] __split_vma+0x170/0x950 [ 37.006169] split_vma+0xc6/0x110 [ 37.006623] mprotect_fixup+0x8d2/0xb30 [ 37.007139] do_mprotect_pkey+0x87e/0xd40 [ 37.007694] __x64_sys_mprotect+0x78/0xc0 [ 37.008229] do_syscall_64+0x3f/0x90 [ 37.008719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.009376] [ 37.009598] Freed by task 213: [ 37.010002] kasan_save_stack+0x22/0x50 [ 37.010522] kasan_set_track+0x25/0x30 [ 37.011031] kasan_save_free_info+0x2b/0x50 [ 37.011588] __kasan_slab_free+0x10a/0x190 [ 37.012144] kmem_cache_free+0x10d/0x4d0 [ 37.012670] rcu_core+0x8c8/0x2860 [ 37.013130] __do_softirq+0x1b7/0x7d4 [ 37.013620] [ 37.013842] Last potentially related work creation: [ 37.014445] kasan_save_stack+0x22/0x50 [ 37.014963] __kasan_record_aux_stack+0x8e/0xa0 [ 37.015561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.016229] remove_vma+0x139/0x170 [ 37.016698] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.017271] do_vmi_munmap+0x1f1/0x2b0 [ 37.017766] __vm_munmap+0x138/0x3a0 [ 37.018252] __x64_sys_munmap+0x59/0x80 [ 37.018765] do_syscall_64+0x3f/0x90 [ 37.019260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.019946] [ 37.020172] The buggy address belongs to the object at ffff88800feda828 [ 37.020172] which belongs to the cache vm_area_struct of size 168 [ 37.021691] The buggy address is located 88 bytes inside of [ 37.021691] freed 168-byte region [ffff88800feda828, ffff88800feda8d0) [ 37.023636] [ 37.023915] The buggy address belongs to the physical page: [ 37.024782] page:000000009e6baf61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeda [ 37.026213] memcg:ffff888016684401 [ 37.026771] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.027624] page_type: 0xffffffff() [ 37.028210] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.029406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016684401 [ 37.030602] page dumped because: kasan: bad access detected [ 37.031469] [ 37.031763] Memory state around the buggy address: [ 37.032522] ffff88800feda780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 37.033641] ffff88800feda800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.034765] >ffff88800feda880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.035893] ^ [ 37.036432] ffff88800feda900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.037549] ffff88800feda980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 37.038695] ================================================================== [ 37.040133] Disabling lock debugging due to kernel taint [ 38.971884] BUG: Bad rss-counter state mm:0000000016a68fbc type:MM_FILEPAGES val:33 [ 38.973006] BUG: Bad rss-counter state mm:0000000016a68fbc type:MM_ANONPAGES val:22 [ 39.446213] BUG: Bad rss-counter state mm:0000000068b3bbb0 type:MM_FILEPAGES val:33 [ 39.447240] BUG: Bad rss-counter state mm:0000000068b3bbb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43436' (ECDSA) to the list of known hosts. 2023/06/19 18:37:55 fuzzer started 2023/06/19 18:37:55 dialing manager at localhost:44161 2023/06/19 18:37:55 checking machine... 2023/06/19 18:37:55 checking revisions... [ 40.139117] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:37:55 testing simple program... [ 40.189403] cgroup: Unknown subsys name 'net' [ 40.260095] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:37:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad6d0 RCX=ffff8880147276c0 RDX=1ffff110028e4ecf RSI=ffff8880147276b8 RDI=ffffffff813ad6d0 RBP=ffffffff813ad6d0 RSP=ffff8880147275d0 R8 =0000000000000001 R9 =ffff888014727660 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff888014728000 R15=ffff888018b6d130 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f15b6c8e900 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=00007f15b60a86c0 CR3=000000000f256000 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=2faced71652e09d500000000000ae988 XMM05=75db19edc3376c920000000000136120 XMM06=19e9129bd510f2350000000000134fd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000005 RBX=ffff888098b7c8d0 RCX=1ffffffff0ba76d3 RDX=0000000000000000 RSI=ffffffff81143144 RDI=0000000000000006 RBP=0000000018b7c8d0 RSP=ffff888015f17cc0 R8 =0000000000000006 R9 =ffff888098b7c8d0 R10=0000000018b7c8d0 R11=0000000000000001 R12=0000000000000000 R13=ffffea00003c6a00 R14=ffffffff81893972 R15=dffffc0000000000 RIP=ffffffff81143163 RFL=00000213 [----A-C] 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 00007f5015bd9900 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=00007ffe8ac7e000 CR3=0000000008eee000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000