syzkaller login: [ 30.855113] BUG: Bad rss-counter state mm:000000006b6061db type:MM_FILEPAGES val:33 [ 30.856489] BUG: Bad rss-counter state mm:000000006b6061db type:MM_ANONPAGES val:22 [ 30.903936] ================================================================== [ 30.904866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.905868] Read of size 8 at addr ffff888009a74df0 by task sshd/220 [ 30.906672] [ 30.906891] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.907788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.908802] Call Trace: [ 30.909131] [ 30.909423] dump_stack_lvl+0x91/0xf0 [ 30.909926] print_report+0xcc/0x620 [ 30.910419] ? __virt_addr_valid+0x102/0x340 [ 30.910986] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.911639] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.912261] kasan_report+0xbe/0xf0 [ 30.912740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.913366] vma_interval_tree_remove+0xc75/0xec0 [ 30.913976] vma_prepare+0xc54/0x11a0 [ 30.914458] __split_vma+0x5af/0x950 [ 30.914930] ? __pfx___split_vma+0x10/0x10 [ 30.915483] ? find_held_lock+0x2c/0x110 [ 30.916005] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.916566] ? lock_is_held_type+0x9f/0x120 [ 30.917111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.917735] ? mtree_range_walk+0x632/0x900 [ 30.918293] ? mas_walk+0x5c7/0x7c0 [ 30.918769] do_vmi_munmap+0x1f1/0x2b0 [ 30.919262] mmap_region+0x1f9/0x2660 [ 30.919778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.920292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.921012] ? __pfx_lock_acquire+0x10/0x10 [ 30.921547] ? __pfx_mmap_region+0x10/0x10 [ 30.922075] ? security_mmap_addr+0x7d/0xa0 [ 30.922614] ? get_unmapped_area+0x1f5/0x3f0 [ 30.923168] do_mmap+0x854/0xf00 [ 30.923621] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.924115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.924686] ksys_mmap_pgoff+0x3af/0x500 [ 30.925191] do_syscall_64+0x3f/0x90 [ 30.925672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926324] RIP: 0033:0x7ffae6527d82 [ 30.926786] 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 [ 30.928939] RSP: 002b:00007ffc52b1d1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.929851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffae6527d82 [ 30.930716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffae5961000 [ 30.931594] RBP: 00007ffae5961000 R08: 0000000000000009 R09: 0000000000001000 [ 30.932445] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620cbd01d90 [ 30.933299] R13: 00007ffc52b1d1f0 R14: 00007ffc52b1d220 R15: 00007ffc52b1d580 [ 30.934173] [ 30.934472] [ 30.934696] Allocated by task 213: [ 30.935121] kasan_save_stack+0x22/0x50 [ 30.935651] kasan_set_track+0x25/0x30 [ 30.936142] __kasan_slab_alloc+0x59/0x70 [ 30.936673] kmem_cache_alloc+0x16b/0x370 [ 30.937191] vm_area_dup+0x20/0x160 [ 30.937642] __split_vma+0x170/0x950 [ 30.938117] split_vma+0xc6/0x110 [ 30.938558] mprotect_fixup+0x8d2/0xb30 [ 30.939064] do_mprotect_pkey+0x87e/0xd40 [ 30.939588] __x64_sys_mprotect+0x78/0xc0 [ 30.940118] do_syscall_64+0x3f/0x90 [ 30.940594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.941234] [ 30.941450] Freed by task 213: [ 30.941847] kasan_save_stack+0x22/0x50 [ 30.942346] kasan_set_track+0x25/0x30 [ 30.942845] kasan_save_free_info+0x2b/0x50 [ 30.943373] __kasan_slab_free+0x10a/0x190 [ 30.943927] kmem_cache_free+0x10d/0x4d0 [ 30.944434] rcu_core+0x8c8/0x2860 [ 30.944883] __do_softirq+0x1b7/0x7d4 [ 30.945363] [ 30.945582] Last potentially related work creation: [ 30.946168] kasan_save_stack+0x22/0x50 [ 30.946678] __kasan_record_aux_stack+0x8e/0xa0 [ 30.947260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.947914] remove_vma+0x139/0x170 [ 30.948370] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.948928] do_vmi_munmap+0x1f1/0x2b0 [ 30.949414] __vm_munmap+0x138/0x3a0 [ 30.949881] __x64_sys_munmap+0x59/0x80 [ 30.950380] do_syscall_64+0x3f/0x90 [ 30.950861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.951526] [ 30.951741] The buggy address belongs to the object at ffff888009a74d98 [ 30.951741] which belongs to the cache vm_area_struct of size 168 [ 30.953219] The buggy address is located 88 bytes inside of [ 30.953219] freed 168-byte region [ffff888009a74d98, ffff888009a74e40) [ 30.954613] [ 30.954834] The buggy address belongs to the physical page: [ 30.955506] page:00000000d6bd3421 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a74 [ 30.956585] memcg:ffff88800e46e601 [ 30.957016] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.957726] page_type: 0xffffffff() [ 30.958188] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bf440 dead000000000003 [ 30.959110] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e46e601 [ 30.960054] page dumped because: kasan: bad access detected [ 30.960724] [ 30.960941] Memory state around the buggy address: [ 30.961520] ffff888009a74c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.962379] ffff888009a74d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.963235] >ffff888009a74d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.964090] ^ [ 30.964907] ffff888009a74e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.965764] ffff888009a74e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.966628] ================================================================== [ 30.967946] Disabling lock debugging due to kernel taint [ 32.949812] BUG: Bad rss-counter state mm:000000009467a904 type:MM_FILEPAGES val:33 [ 32.950789] BUG: Bad rss-counter state mm:000000009467a904 type:MM_ANONPAGES val:22 [ 33.408352] BUG: Bad rss-counter state mm:0000000086014222 type:MM_FILEPAGES val:33 [ 33.409273] BUG: Bad rss-counter state mm:0000000086014222 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25445' (ECDSA) to the list of known hosts. 2023/06/20 16:53:07 fuzzer started 2023/06/20 16:53:07 dialing manager at localhost:36067 2023/06/20 16:53:07 checking machine... 2023/06/20 16:53:07 checking revisions... [ 34.128492] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:53:07 testing simple program... [ 34.175668] cgroup: Unknown subsys name 'net' [ 34.213332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:53:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11002873ee4 RCX=0000000000000000 RDX=1ffff1100189f462 RSI=ffffffff818ac9e5 RDI=ffff88800c4fa310 RBP=ffff88801439f8c8 RSP=ffff88801439f700 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88801439f750 R14=0000000000000000 R15=ffff88800c4f9b40 RIP=ffffffff814c0864 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 00007f9728f68900 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=00007f9728486000 CR3=000000000f5c6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=582f5c94225a735400000000000ae988 XMM05=795de9c3ea7feec20000000000132e60 XMM06=4fda316b135da52b0000000000131c50 XMM07=fb795ef6d65770560000000000121eb8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000006 RCX=ffffffff8149396e RDX=ffff888015be3680 RSI=00000000000003fb RDI=0000000000000003 RBP=ffffffff848a4ec0 RSP=ffff88800bfb7858 R8 =0000000000000003 R9 =00000000000003f2 R10=0000000000000452 R11=656d616e74736f68 R12=0000000000000452 R13=0000000000000003 R14=000000000000000b R15=0000000000000452 RIP=ffffffff814c04a0 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 00007f1b6fee4900 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=00007ffee350b000 CR3=000000000c55e000 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