syzkaller login: [ 30.171988] BUG: Bad rss-counter state mm:0000000053ee3408 type:MM_FILEPAGES val:33 [ 30.173010] BUG: Bad rss-counter state mm:0000000053ee3408 type:MM_ANONPAGES val:22 [ 30.348908] ================================================================== [ 30.349840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.350759] Read of size 8 at addr ffff88801954a5c8 by task sshd/219 [ 30.351525] [ 30.351872] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.352739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.353737] Call Trace: [ 30.354073] [ 30.354356] dump_stack_lvl+0x91/0xf0 [ 30.354841] print_report+0xcc/0x620 [ 30.355324] ? __virt_addr_valid+0x102/0x340 [ 30.355870] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.356485] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.357101] kasan_report+0xbe/0xf0 [ 30.357576] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.358203] vma_interval_tree_remove+0xc75/0xec0 [ 30.358809] vma_prepare+0xc54/0x11a0 [ 30.359286] __split_vma+0x5af/0x950 [ 30.359763] ? __pfx___split_vma+0x10/0x10 [ 30.360290] ? find_held_lock+0x2c/0x110 [ 30.360813] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.361372] ? lock_is_held_type+0x9f/0x120 [ 30.361930] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.362536] ? mtree_range_walk+0x632/0x900 [ 30.363083] ? mas_walk+0x5c7/0x7c0 [ 30.363557] do_vmi_munmap+0x1f1/0x2b0 [ 30.364045] mmap_region+0x1f9/0x2660 [ 30.364528] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.365036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.365754] ? __pfx_lock_acquire+0x10/0x10 [ 30.366294] ? __pfx_mmap_region+0x10/0x10 [ 30.366819] ? security_mmap_addr+0x7d/0xa0 [ 30.367347] ? get_unmapped_area+0x1f5/0x3f0 [ 30.367891] do_mmap+0x854/0xf00 [ 30.368332] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.368825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.369389] ksys_mmap_pgoff+0x3af/0x500 [ 30.369915] do_syscall_64+0x3f/0x90 [ 30.370391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.371036] RIP: 0033:0x7fa4d4c4ed82 [ 30.371500] 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 [ 30.373685] RSP: 002b:00007fff5ed29818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.374592] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4d4c4ed82 [ 30.375443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4d4088000 [ 30.376281] RBP: 00007fa4d4088000 R08: 0000000000000009 R09: 0000000000001000 [ 30.377118] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d15a6f8ec0 [ 30.377995] R13: 00007fff5ed29830 R14: 00007fff5ed29860 R15: 00007fff5ed29bc0 [ 30.378853] [ 30.379143] [ 30.379357] Allocated by task 212: [ 30.379788] kasan_save_stack+0x22/0x50 [ 30.380291] kasan_set_track+0x25/0x30 [ 30.380780] __kasan_slab_alloc+0x59/0x70 [ 30.381300] kmem_cache_alloc+0x16b/0x370 [ 30.381820] vm_area_dup+0x20/0x160 [ 30.382278] __split_vma+0x170/0x950 [ 30.382746] split_vma+0xc6/0x110 [ 30.383179] mprotect_fixup+0x8d2/0xb30 [ 30.383679] do_mprotect_pkey+0x87e/0xd40 [ 30.384201] __x64_sys_mprotect+0x78/0xc0 [ 30.384720] do_syscall_64+0x3f/0x90 [ 30.385201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.385843] [ 30.386057] Freed by task 212: [ 30.386445] kasan_save_stack+0x22/0x50 [ 30.386946] kasan_set_track+0x25/0x30 [ 30.387435] kasan_save_free_info+0x2b/0x50 [ 30.387964] __kasan_slab_free+0x10a/0x190 [ 30.388501] kmem_cache_free+0x10d/0x4d0 [ 30.389010] rcu_core+0x8c8/0x2860 [ 30.389454] __do_softirq+0x1b7/0x7d4 [ 30.389949] [ 30.390166] Last potentially related work creation: [ 30.390756] kasan_save_stack+0x22/0x50 [ 30.391267] __kasan_record_aux_stack+0x8e/0xa0 [ 30.391843] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.392487] remove_vma+0x139/0x170 [ 30.393016] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.393572] do_vmi_munmap+0x1f1/0x2b0 [ 30.394071] __vm_munmap+0x138/0x3a0 [ 30.394535] __x64_sys_munmap+0x59/0x80 [ 30.395038] do_syscall_64+0x3f/0x90 [ 30.395510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396159] [ 30.396372] The buggy address belongs to the object at ffff88801954a570 [ 30.396372] which belongs to the cache vm_area_struct of size 168 [ 30.397850] The buggy address is located 88 bytes inside of [ 30.397850] freed 168-byte region [ffff88801954a570, ffff88801954a618) [ 30.399256] [ 30.399472] The buggy address belongs to the physical page: [ 30.400126] page:00000000205e7a3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1954a [ 30.401218] memcg:ffff888019544101 [ 30.401651] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.402293] page_type: 0xffffffff() [ 30.402740] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.403664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019544101 [ 30.404566] page dumped because: kasan: bad access detected [ 30.405226] [ 30.405441] Memory state around the buggy address: [ 30.406069] ffff88801954a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.406921] ffff88801954a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.407774] >ffff88801954a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.408615] ^ [ 30.409278] ffff88801954a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.410391] ffff88801954a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.411528] ================================================================== [ 30.412750] Disabling lock debugging due to kernel taint [ 32.590933] BUG: Bad rss-counter state mm:00000000786f0134 type:MM_FILEPAGES val:33 [ 32.592235] BUG: Bad rss-counter state mm:00000000786f0134 type:MM_ANONPAGES val:22 [ 33.001434] BUG: Bad rss-counter state mm:0000000063656128 type:MM_FILEPAGES val:33 [ 33.002498] BUG: Bad rss-counter state mm:0000000063656128 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44850' (ECDSA) to the list of known hosts. 2023/06/20 07:10:09 fuzzer started 2023/06/20 07:10:09 dialing manager at localhost:44161 2023/06/20 07:10:09 checking machine... 2023/06/20 07:10:09 checking revisions... [ 33.729987] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:10:09 testing simple program... [ 33.781712] cgroup: Unknown subsys name 'net' [ 33.842164] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:10:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007ffdab6a8f38 CR3=000000000ec22000 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=2038303a30313a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a30313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a78 RCX=ffffffff863b1c01 RDX=1ffff1100d9e135a RSI=0000000000000000 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a60 R8 =ffffffff863b1c9a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000008a977 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888016b3d1c0 R15=ffff88800d97db80 RIP=ffffffff8113038e 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 00007facb68c6900 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=00007fffca237000 CR3=000000000eb5e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000