syzkaller login: [ 39.093237] BUG: Bad rss-counter state mm:00000000975b803f type:MM_FILEPAGES val:33 [ 39.094820] BUG: Bad rss-counter state mm:00000000975b803f type:MM_ANONPAGES val:22 [ 39.197499] ================================================================== [ 39.198219] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.198948] Read of size 8 at addr ffff88801b5ceed8 by task sshd/219 [ 39.199557] [ 39.199723] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.200405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.201254] Call Trace: [ 39.201500] [ 39.201725] dump_stack_lvl+0x91/0xf0 [ 39.202108] print_report+0xcc/0x620 [ 39.202482] ? __virt_addr_valid+0x102/0x340 [ 39.202922] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.203426] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.203909] kasan_report+0xbe/0xf0 [ 39.204257] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.204695] vma_interval_tree_remove+0xc75/0xec0 [ 39.205107] vma_prepare+0xc54/0x11a0 [ 39.205442] __split_vma+0x5af/0x950 [ 39.205771] ? __pfx___split_vma+0x10/0x10 [ 39.206142] ? find_held_lock+0x2c/0x110 [ 39.206510] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.206897] ? lock_is_held_type+0x9f/0x120 [ 39.207290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.207710] ? mtree_range_walk+0x632/0x900 [ 39.208096] ? mas_walk+0x5c7/0x7c0 [ 39.208422] do_vmi_munmap+0x1f1/0x2b0 [ 39.208761] mmap_region+0x1f9/0x2660 [ 39.209098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.209457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.209960] ? __pfx_lock_acquire+0x10/0x10 [ 39.210329] ? __pfx_mmap_region+0x10/0x10 [ 39.210692] ? security_mmap_addr+0x7d/0xa0 [ 39.211071] ? get_unmapped_area+0x1f5/0x3f0 [ 39.211459] do_mmap+0x854/0xf00 [ 39.211761] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.212106] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.212492] ksys_mmap_pgoff+0x3af/0x500 [ 39.212845] do_syscall_64+0x3f/0x90 [ 39.213176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.213625] RIP: 0033:0x7f32b1ff5d82 [ 39.213940] 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 [ 39.215449] RSP: 002b:00007fff6d313798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.216081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32b1ff5d82 [ 39.216666] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32b142f000 [ 39.217251] RBP: 00007f32b142f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.217842] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f72b1bec0 [ 39.218425] R13: 00007fff6d3137b0 R14: 00007fff6d3137e0 R15: 00007fff6d313b40 [ 39.219015] [ 39.219226] [ 39.219374] Allocated by task 212: [ 39.219673] kasan_save_stack+0x22/0x50 [ 39.220026] kasan_set_track+0x25/0x30 [ 39.220363] __kasan_slab_alloc+0x59/0x70 [ 39.220722] kmem_cache_alloc+0x16b/0x370 [ 39.221077] vm_area_dup+0x20/0x160 [ 39.221390] __split_vma+0x170/0x950 [ 39.221713] split_vma+0xc6/0x110 [ 39.222016] mprotect_fixup+0x8d2/0xb30 [ 39.222364] do_mprotect_pkey+0x87e/0xd40 [ 39.222723] __x64_sys_mprotect+0x78/0xc0 [ 39.223096] do_syscall_64+0x3f/0x90 [ 39.223428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.223868] [ 39.224015] Freed by task 212: [ 39.224307] kasan_save_stack+0x22/0x50 [ 39.224668] kasan_set_track+0x25/0x30 [ 39.225030] kasan_save_free_info+0x2b/0x50 [ 39.225407] __kasan_slab_free+0x10a/0x190 [ 39.225777] kmem_cache_free+0x10d/0x4d0 [ 39.226128] rcu_core+0x8c8/0x2860 [ 39.226432] __do_softirq+0x1b7/0x7d4 [ 39.226761] [ 39.226914] Last potentially related work creation: [ 39.227331] kasan_save_stack+0x22/0x50 [ 39.227678] __kasan_record_aux_stack+0x8e/0xa0 [ 39.228072] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.228518] remove_vma+0x139/0x170 [ 39.228830] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.229211] do_vmi_munmap+0x1f1/0x2b0 [ 39.229545] __vm_munmap+0x138/0x3a0 [ 39.229865] __x64_sys_munmap+0x59/0x80 [ 39.230205] do_syscall_64+0x3f/0x90 [ 39.230540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.230986] [ 39.231148] The buggy address belongs to the object at ffff88801b5cee80 [ 39.231148] which belongs to the cache vm_area_struct of size 168 [ 39.232169] The buggy address is located 88 bytes inside of [ 39.232169] freed 168-byte region [ffff88801b5cee80, ffff88801b5cef28) [ 39.233153] [ 39.233305] The buggy address belongs to the physical page: [ 39.233762] page:000000005cd67287 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b5ce [ 39.234519] memcg:ffff888014503c01 [ 39.234812] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.235267] page_type: 0xffffffff() [ 39.235582] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.236224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014503c01 [ 39.236852] page dumped because: kasan: bad access detected [ 39.237306] [ 39.237453] Memory state around the buggy address: [ 39.237852] ffff88801b5ced80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.238439] ffff88801b5cee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.239028] >ffff88801b5cee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.239628] ^ [ 39.240132] ffff88801b5cef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.240726] ffff88801b5cef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.241314] ================================================================== [ 39.242087] Disabling lock debugging due to kernel taint [ 41.265054] BUG: Bad rss-counter state mm:000000004ca9c1a4 type:MM_FILEPAGES val:33 [ 41.265926] BUG: Bad rss-counter state mm:000000004ca9c1a4 type:MM_ANONPAGES val:22 [ 41.703048] BUG: Bad rss-counter state mm:00000000b41ec70b type:MM_FILEPAGES val:33 [ 41.704060] BUG: Bad rss-counter state mm:00000000b41ec70b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51224' (ECDSA) to the list of known hosts. 2023/06/20 15:55:03 fuzzer started 2023/06/20 15:55:03 dialing manager at localhost:36067 2023/06/20 15:55:03 checking machine... 2023/06/20 15:55:03 checking revisions... [ 42.411233] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:55:04 testing simple program... [ 42.459398] cgroup: Unknown subsys name 'net' [ 42.495830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:55:03 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff864bce2c RDX=00000000000000a8 RSI=ffff88801990f108 RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864bce30 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88801990f108 R15=ffff88806ce09a70 RIP=ffffffff8113137a 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 00007fe2751c1900 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=00007fe275778618 CR3=000000000e392000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000010 RCX=ffffffff844a502b RDX=00007f43f8eb3fff RSI=00007f43f905b230 RDI=0000000000000006 RBP=ffff88800e0d8208 RSP=ffff888017e97cc0 R8 =0000000000000006 R9 =00007f43f905b230 R10=00007f43f8eb3fff R11=0000000000000000 R12=0000000000000002 R13=0000000000000006 R14=00007f43f905b230 R15=00007f43f8eb3fff RIP=ffffffff814c0250 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f43f8742900 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=00007f43f905b230 CR3=0000000019bbc000 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=0000000000ff00000000000000000000 XMM02=7273752f3a6e6962732f7273752f3a6e XMM03=62732f6c61636f6c2f7273752f3d4854 XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00007f43f87fe5f000007f43f87fe060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000