syzkaller login: [ 30.598927] BUG: Bad rss-counter state mm:0000000044fc3c15 type:MM_FILEPAGES val:33 [ 30.600642] BUG: Bad rss-counter state mm:0000000044fc3c15 type:MM_ANONPAGES val:22 [ 30.770093] ================================================================== [ 30.771020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.771954] Read of size 8 at addr ffff888013db44e0 by task sshd/221 [ 30.772731] [ 30.772951] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.773964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.774961] Call Trace: [ 30.775296] [ 30.775822] dump_stack_lvl+0x91/0xf0 [ 30.776621] print_report+0xcc/0x620 [ 30.777422] ? __virt_addr_valid+0x102/0x340 [ 30.778264] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779097] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779785] kasan_report+0xbe/0xf0 [ 30.780293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780945] vma_interval_tree_remove+0xc75/0xec0 [ 30.781571] vma_prepare+0xc54/0x11a0 [ 30.782079] __split_vma+0x5af/0x950 [ 30.782561] ? __pfx___split_vma+0x10/0x10 [ 30.783136] ? find_held_lock+0x2c/0x110 [ 30.783665] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.784262] ? lock_is_held_type+0x9f/0x120 [ 30.784820] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.785455] ? mtree_range_walk+0x632/0x900 [ 30.786037] ? mas_walk+0x5c7/0x7c0 [ 30.786521] do_vmi_munmap+0x1f1/0x2b0 [ 30.787052] mmap_region+0x1f9/0x2660 [ 30.787543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.788081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.788812] ? __pfx_lock_acquire+0x10/0x10 [ 30.789369] ? __pfx_mmap_region+0x10/0x10 [ 30.789924] ? security_mmap_addr+0x7d/0xa0 [ 30.790456] ? get_unmapped_area+0x1f5/0x3f0 [ 30.791043] do_mmap+0x854/0xf00 [ 30.791489] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.792010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.792578] ksys_mmap_pgoff+0x3af/0x500 [ 30.793108] do_syscall_64+0x3f/0x90 [ 30.793610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794284] RIP: 0033:0x7fc303636d82 [ 30.794749] 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 [ 30.796988] RSP: 002b:00007ffd1c27f2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.797946] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc303636d82 [ 30.798855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc302a70000 [ 30.799763] RBP: 00007fc302a70000 R08: 0000000000000009 R09: 0000000000001000 [ 30.800665] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561921d6cf60 [ 30.801601] R13: 00007ffd1c27f2c0 R14: 00007ffd1c27f2f0 R15: 00007ffd1c27f650 [ 30.802481] [ 30.802791] [ 30.803016] Allocated by task 214: [ 30.803457] kasan_save_stack+0x22/0x50 [ 30.804000] kasan_set_track+0x25/0x30 [ 30.804498] __kasan_slab_alloc+0x59/0x70 [ 30.805049] kmem_cache_alloc+0x16b/0x370 [ 30.805590] vm_area_dup+0x20/0x160 [ 30.806069] __split_vma+0x170/0x950 [ 30.806542] split_vma+0xc6/0x110 [ 30.807007] mprotect_fixup+0x8d2/0xb30 [ 30.807514] do_mprotect_pkey+0x87e/0xd40 [ 30.808073] __x64_sys_mprotect+0x78/0xc0 [ 30.808604] do_syscall_64+0x3f/0x90 [ 30.809104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809784] [ 30.810004] Freed by task 214: [ 30.810404] kasan_save_stack+0x22/0x50 [ 30.810922] kasan_set_track+0x25/0x30 [ 30.811423] kasan_save_free_info+0x2b/0x50 [ 30.811990] __kasan_slab_free+0x10a/0x190 [ 30.812528] kmem_cache_free+0x10d/0x4d0 [ 30.813061] rcu_core+0x8c8/0x2860 [ 30.813522] __do_softirq+0x1b7/0x7d4 [ 30.814021] [ 30.814236] Last potentially related work creation: [ 30.814837] kasan_save_stack+0x22/0x50 [ 30.815348] __kasan_record_aux_stack+0x8e/0xa0 [ 30.815956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.816603] remove_vma+0x139/0x170 [ 30.817078] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817664] do_vmi_munmap+0x1f1/0x2b0 [ 30.818171] __vm_munmap+0x138/0x3a0 [ 30.818639] __x64_sys_munmap+0x59/0x80 [ 30.819152] do_syscall_64+0x3f/0x90 [ 30.819629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820318] [ 30.820538] Second to last potentially related work creation: [ 30.821245] kasan_save_stack+0x22/0x50 [ 30.821789] __kasan_record_aux_stack+0x8e/0xa0 [ 30.822384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823053] remove_vma+0x139/0x170 [ 30.823513] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824103] do_vmi_munmap+0x1f1/0x2b0 [ 30.824602] mmap_region+0x1f9/0x2660 [ 30.825108] do_mmap+0x854/0xf00 [ 30.825562] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.826073] ksys_mmap_pgoff+0x3af/0x500 [ 30.826594] do_syscall_64+0x3f/0x90 [ 30.827081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827725] [ 30.827959] The buggy address belongs to the object at ffff888013db4488 [ 30.827959] which belongs to the cache vm_area_struct of size 168 [ 30.829482] The buggy address is located 88 bytes inside of [ 30.829482] freed 168-byte region [ffff888013db4488, ffff888013db4530) [ 30.830928] [ 30.831152] The buggy address belongs to the physical page: [ 30.831831] page:00000000d3d915fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13db4 [ 30.832945] memcg:ffff88800c998901 [ 30.833387] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.834047] page_type: 0xffffffff() [ 30.834501] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395f00 dead000000000002 [ 30.835441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c998901 [ 30.836380] page dumped because: kasan: bad access detected [ 30.837062] [ 30.837306] Memory state around the buggy address: [ 30.837912] ffff888013db4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.838797] ffff888013db4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.839666] >ffff888013db4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.840538] ^ [ 30.841319] ffff888013db4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.842195] ffff888013db4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.843070] ================================================================== [ 30.844092] Disabling lock debugging due to kernel taint [ 32.962265] BUG: Bad rss-counter state mm:00000000acfde215 type:MM_FILEPAGES val:33 [ 32.963237] BUG: Bad rss-counter state mm:00000000acfde215 type:MM_ANONPAGES val:22 [ 32.966450] sshd (221) used greatest stack depth: 24120 bytes left [ 33.425717] BUG: Bad rss-counter state mm:00000000631a3826 type:MM_FILEPAGES val:33 [ 33.426721] BUG: Bad rss-counter state mm:00000000631a3826 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6552' (ECDSA) to the list of known hosts. 2023/06/20 12:23:23 fuzzer started 2023/06/20 12:23:23 dialing manager at localhost:36067 2023/06/20 12:23:23 checking machine... 2023/06/20 12:23:23 checking revisions... [ 34.157488] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:23:23 testing simple program... [ 34.216588] cgroup: Unknown subsys name 'net' [ 34.260457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:23:23 Registers: info registers vcpu 0 RAX=ffffffff8180ef51 RBX=ffffffff85dfe518 RCX=ffffffff8180effd RDX=0000000000000000 RSI=ffffffff861395f4 RDI=ffffffff85dfe50c RBP=ffffffff85dfe51c RSP=ffff88806ce09998 R8 =ffffffff861395f4 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020ed2 R12=ffffffff85dfe528 R13=ffffffff85dfe50c R14=ffffffff85dfe50c R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000206 [-----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 00007fb16d5c5900 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=00007fb71b89b650 CR3=000000000df7a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=773333e4323ccfcf00000000000ae988 XMM05=3cc2c6ee66a6afb300000000001330c8 XMM06=c291bd5c70af25b90000000000131b48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000f4 RBX=00000000000000f4 RCX=00007fb71b7d9366 RDX=00000000000000f4 RSI=00007ffdbb394f10 RDI=0000000000000008 RBP=00000000000000f4 RSP=00007ffdbb394ee0 R8 =00007ffdbb394efc R9 =000000000000000c R10=0000000000000000 R11=0000000000000246 R12=0000000000000008 R13=0000000000000050 R14=00007ffdbb394efc R15=00000000000000f4 RIP=00007fb71be20c75 RFL=00000246 [---Z-P-] 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 00007fb71b2e6900 00000000 00000000 GS =0000 0000000000000000 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=00007ffdbb396000 CR3=000000000f5b4000 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