syzkaller login: [ 32.763431] BUG: Bad rss-counter state mm:000000006f3d3dcf type:MM_FILEPAGES val:33 [ 32.765485] BUG: Bad rss-counter state mm:000000006f3d3dcf type:MM_ANONPAGES val:22 [ 32.932489] ================================================================== [ 32.933570] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.934689] Read of size 8 at addr ffff888019c366b0 by task sshd/220 [ 32.935700] [ 32.935924] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.936788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.937778] Call Trace: [ 32.938101] [ 32.938387] dump_stack_lvl+0x91/0xf0 [ 32.938872] print_report+0xcc/0x620 [ 32.939376] ? __virt_addr_valid+0x102/0x340 [ 32.939947] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.940574] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.941187] kasan_report+0xbe/0xf0 [ 32.941665] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.942286] vma_interval_tree_remove+0xc75/0xec0 [ 32.942901] vma_prepare+0xc54/0x11a0 [ 32.943402] __split_vma+0x5af/0x950 [ 32.943871] ? __pfx___split_vma+0x10/0x10 [ 32.944397] ? find_held_lock+0x2c/0x110 [ 32.944917] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.945486] ? lock_is_held_type+0x9f/0x120 [ 32.946023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.946629] ? mtree_range_walk+0x632/0x900 [ 32.947187] ? mas_walk+0x5c7/0x7c0 [ 32.947663] do_vmi_munmap+0x1f1/0x2b0 [ 32.948154] mmap_region+0x1f9/0x2660 [ 32.948634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.949146] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.949861] ? __pfx_lock_acquire+0x10/0x10 [ 32.950398] ? __pfx_mmap_region+0x10/0x10 [ 32.950925] ? security_mmap_addr+0x7d/0xa0 [ 32.951466] ? get_unmapped_area+0x1f5/0x3f0 [ 32.952020] do_mmap+0x854/0xf00 [ 32.952460] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.952957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.953517] ksys_mmap_pgoff+0x3af/0x500 [ 32.954029] do_syscall_64+0x3f/0x90 [ 32.954506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.955170] RIP: 0033:0x7fb224056d82 [ 32.955628] 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 [ 32.957763] RSP: 002b:00007ffe8d530ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.958680] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb224056d82 [ 32.959551] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb223490000 [ 32.960408] RBP: 00007fb223490000 R08: 0000000000000009 R09: 0000000000001000 [ 32.961276] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f06a78cd90 [ 32.962144] R13: 00007ffe8d530f00 R14: 00007ffe8d530f30 R15: 00007ffe8d531290 [ 32.963008] [ 32.963315] [ 32.963537] Allocated by task 213: [ 32.963972] kasan_save_stack+0x22/0x50 [ 32.964481] kasan_set_track+0x25/0x30 [ 32.964982] __kasan_slab_alloc+0x59/0x70 [ 32.965516] kmem_cache_alloc+0x16b/0x370 [ 32.966029] vm_area_dup+0x20/0x160 [ 32.966480] __split_vma+0x170/0x950 [ 32.966944] split_vma+0xc6/0x110 [ 32.967402] mprotect_fixup+0x8d2/0xb30 [ 32.967906] do_mprotect_pkey+0x87e/0xd40 [ 32.968438] __x64_sys_mprotect+0x78/0xc0 [ 32.968965] do_syscall_64+0x3f/0x90 [ 32.969448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.970121] [ 32.970334] Freed by task 203: [ 32.970733] kasan_save_stack+0x22/0x50 [ 32.971247] kasan_set_track+0x25/0x30 [ 32.971740] kasan_save_free_info+0x2b/0x50 [ 32.972279] __kasan_slab_free+0x10a/0x190 [ 32.972808] kmem_cache_free+0x10d/0x4d0 [ 32.973323] rcu_core+0x8c8/0x2860 [ 32.973766] __do_softirq+0x1b7/0x7d4 [ 32.974250] [ 32.974468] Last potentially related work creation: [ 32.975065] kasan_save_stack+0x22/0x50 [ 32.975569] __kasan_record_aux_stack+0x8e/0xa0 [ 32.976146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.976793] remove_vma+0x139/0x170 [ 32.977242] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.977806] do_vmi_munmap+0x1f1/0x2b0 [ 32.978312] __vm_munmap+0x138/0x3a0 [ 32.978791] __x64_sys_munmap+0x59/0x80 [ 32.979293] do_syscall_64+0x3f/0x90 [ 32.979785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.980428] [ 32.980647] Second to last potentially related work creation: [ 32.981346] kasan_save_stack+0x22/0x50 [ 32.981853] __kasan_record_aux_stack+0x8e/0xa0 [ 32.982441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.983109] remove_vma+0x139/0x170 [ 32.983562] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.984136] do_vmi_munmap+0x1f1/0x2b0 [ 32.984623] mmap_region+0x1f9/0x2660 [ 32.985098] do_mmap+0x854/0xf00 [ 32.985528] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.986017] ksys_mmap_pgoff+0x3af/0x500 [ 32.986515] do_syscall_64+0x3f/0x90 [ 32.986987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.987634] [ 32.987848] The buggy address belongs to the object at ffff888019c36658 [ 32.987848] which belongs to the cache vm_area_struct of size 168 [ 32.989313] The buggy address is located 88 bytes inside of [ 32.989313] freed 168-byte region [ffff888019c36658, ffff888019c36700) [ 32.990729] [ 32.990944] The buggy address belongs to the physical page: [ 32.991604] page:00000000a4770726 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c36 [ 32.992705] memcg:ffff888018d8a901 [ 32.993128] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.993763] page_type: 0xffffffff() [ 32.994212] raw: 0100000000000200 ffff88800879fc80 ffffea0000630640 0000000000000006 [ 32.995224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d8a901 [ 32.996166] page dumped because: kasan: bad access detected [ 32.996841] [ 32.997065] Memory state around the buggy address: [ 32.997655] ffff888019c36580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.998513] ffff888019c36600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.999386] >ffff888019c36680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.000255] ^ [ 33.000861] ffff888019c36700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 33.001730] ffff888019c36780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.002600] ================================================================== [ 33.003601] Disabling lock debugging due to kernel taint [ 35.382949] BUG: Bad rss-counter state mm:000000001abd72bc type:MM_FILEPAGES val:33 [ 35.384357] BUG: Bad rss-counter state mm:000000001abd72bc type:MM_ANONPAGES val:22 [ 35.844692] BUG: Bad rss-counter state mm:000000005653ca56 type:MM_FILEPAGES val:33 [ 35.845676] BUG: Bad rss-counter state mm:000000005653ca56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16463' (ECDSA) to the list of known hosts. 2023/06/19 17:32:30 fuzzer started 2023/06/19 17:32:30 dialing manager at localhost:44161 2023/06/19 17:32:30 checking machine... 2023/06/19 17:32:30 checking revisions... [ 36.576318] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:32:31 testing simple program... [ 36.615732] cgroup: Unknown subsys name 'net' [ 36.677187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:32:28 Registers: info registers vcpu 0 RAX=00007f4bd002c170 RBX=000000000000005a RCX=0000000000000000 RDX=000000000000005a RSI=00007f4bd4005f90 RDI=00007f4bd002c170 RBP=00007f4bd4005f90 RSP=00007f4bde1688a8 R8 =00007f4bd8006b38 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=00007f4bd002bed0 R13=000000000000005a R14=000000000000005a R15=000056157ba85760 RIP=00007f4bdee5ec0b RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4bde169700 00000000 00000000 GS =0000 0000000000000000 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=00007f48dc618410 CR3=000000000dc3e000 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=2030333a32333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800f317f10 RSI=ffff88800f317ed8 RDI=ffff88800f3176f0 RBP=ffff88800f317778 RSP=ffff88800f3176c0 R8 =0000000000000001 R9 =ffff88800f317720 R10=0000000000038001 R11=000000000008aa86 R12=ffff88800f3177a8 R13=ffff88800f317728 R14=ffff88800f317ed8 R15=ffff88800f3176e0 RIP=ffffffff81130933 RFL=00000282 [--S----] 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 00007fd5592ca900 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=00007ffe15487000 CR3=0000000016a62000 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