syzkaller login: [ 31.011570] BUG: Bad rss-counter state mm:000000001c79113a type:MM_FILEPAGES val:33 [ 31.012537] BUG: Bad rss-counter state mm:000000001c79113a type:MM_ANONPAGES val:22 [ 31.192923] ================================================================== [ 31.193919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.195053] Read of size 8 at addr ffff88800f954d08 by task sshd/219 [ 31.195871] [ 31.196104] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.197058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.198125] Call Trace: [ 31.198464] [ 31.198769] dump_stack_lvl+0x91/0xf0 [ 31.199297] print_report+0xcc/0x620 [ 31.199815] ? __virt_addr_valid+0x102/0x340 [ 31.200406] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201107] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201790] kasan_report+0xbe/0xf0 [ 31.202309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202990] vma_interval_tree_remove+0xc75/0xec0 [ 31.203652] vma_prepare+0xc54/0x11a0 [ 31.204177] __split_vma+0x5af/0x950 [ 31.204731] ? __pfx___split_vma+0x10/0x10 [ 31.205316] ? find_held_lock+0x2c/0x110 [ 31.205897] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.206519] ? lock_is_held_type+0x9f/0x120 [ 31.207112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.207779] ? mtree_range_walk+0x632/0x900 [ 31.208388] ? mas_walk+0x5c7/0x7c0 [ 31.208942] do_vmi_munmap+0x1f1/0x2b0 [ 31.209491] mmap_region+0x1f9/0x2660 [ 31.210070] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.210635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.211423] ? __pfx_lock_acquire+0x10/0x10 [ 31.212008] ? __pfx_mmap_region+0x10/0x10 [ 31.212582] ? security_mmap_addr+0x7d/0xa0 [ 31.213168] ? get_unmapped_area+0x1f5/0x3f0 [ 31.213823] do_mmap+0x854/0xf00 [ 31.214307] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.214852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.215456] ksys_mmap_pgoff+0x3af/0x500 [ 31.215997] do_syscall_64+0x3f/0x90 [ 31.216518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217218] RIP: 0033:0x7f816db50d82 [ 31.217773] 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 [ 31.220071] RSP: 002b:00007fff3a0055f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.221055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f816db50d82 [ 31.222017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f816cf8a000 [ 31.222920] RBP: 00007f816cf8a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.223840] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d454540b20 [ 31.224746] R13: 00007fff3a005610 R14: 00007fff3a005640 R15: 00007fff3a0059a0 [ 31.225706] [ 31.226029] [ 31.226259] Allocated by task 212: [ 31.226714] kasan_save_stack+0x22/0x50 [ 31.227257] kasan_set_track+0x25/0x30 [ 31.227786] __kasan_slab_alloc+0x59/0x70 [ 31.228347] kmem_cache_alloc+0x16b/0x370 [ 31.228903] vm_area_dup+0x20/0x160 [ 31.229396] __split_vma+0x170/0x950 [ 31.229962] split_vma+0xc6/0x110 [ 31.230437] mprotect_fixup+0x8d2/0xb30 [ 31.230980] do_mprotect_pkey+0x87e/0xd40 [ 31.231543] __x64_sys_mprotect+0x78/0xc0 [ 31.232105] do_syscall_64+0x3f/0x90 [ 31.232612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233312] [ 31.233542] Freed by task 212: [ 31.234009] kasan_save_stack+0x22/0x50 [ 31.234551] kasan_set_track+0x25/0x30 [ 31.235071] kasan_save_free_info+0x2b/0x50 [ 31.235663] __kasan_slab_free+0x10a/0x190 [ 31.236231] kmem_cache_free+0x10d/0x4d0 [ 31.236774] rcu_core+0x8c8/0x2860 [ 31.237239] __do_softirq+0x1b7/0x7d4 [ 31.237791] [ 31.238021] Last potentially related work creation: [ 31.238635] kasan_save_stack+0x22/0x50 [ 31.239177] __kasan_record_aux_stack+0x8e/0xa0 [ 31.239789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.240470] remove_vma+0x139/0x170 [ 31.240957] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.241542] do_vmi_munmap+0x1f1/0x2b0 [ 31.242112] __vm_munmap+0x138/0x3a0 [ 31.242613] __x64_sys_munmap+0x59/0x80 [ 31.243131] do_syscall_64+0x3f/0x90 [ 31.243633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244322] [ 31.244547] The buggy address belongs to the object at ffff88800f954cb0 [ 31.244547] which belongs to the cache vm_area_struct of size 168 [ 31.246140] The buggy address is located 88 bytes inside of [ 31.246140] freed 168-byte region [ffff88800f954cb0, ffff88800f954d58) [ 31.247665] [ 31.247899] The buggy address belongs to the physical page: [ 31.248595] page:0000000057c50e11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf954 [ 31.249789] memcg:ffff88800ebb8b01 [ 31.250248] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.250931] page_type: 0xffffffff() [ 31.251416] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.252401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebb8b01 [ 31.253343] page dumped because: kasan: bad access detected [ 31.254093] [ 31.254324] Memory state around the buggy address: [ 31.254927] ffff88800f954c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.255816] ffff88800f954c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.256695] >ffff88800f954d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.257607] ^ [ 31.258101] ffff88800f954d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.258990] ffff88800f954e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.259879] ================================================================== [ 31.261035] Disabling lock debugging due to kernel taint [ 32.603637] BUG: Bad rss-counter state mm:000000003b5dfd9c type:MM_FILEPAGES val:33 [ 32.604433] BUG: Bad rss-counter state mm:000000003b5dfd9c type:MM_ANONPAGES val:22 [ 32.949839] BUG: Bad rss-counter state mm:000000004ba6879f type:MM_FILEPAGES val:33 [ 32.950838] BUG: Bad rss-counter state mm:000000004ba6879f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15978' (ECDSA) to the list of known hosts. 2023/06/21 03:03:44 fuzzer started 2023/06/21 03:03:45 dialing manager at localhost:36067 2023/06/21 03:03:45 checking machine... 2023/06/21 03:03:45 checking revisions... [ 33.548147] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:03:45 testing simple program... [ 33.587198] cgroup: Unknown subsys name 'net' [ 33.632540] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:03:44 Registers: info registers vcpu 0 RAX=ffffffff860d2587 RBX=0000000000000002 RCX=ffffffff860d2586 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff860d258a R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09de0 R15=ffff88806ce09a70 RIP=ffffffff81130b8f RFL=00000297 [--S-APC] 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 00007f50e1797900 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=00007f50e1d4e618 CR3=00000000147b4000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffdfdfb2c68 CR3=000000000904c000 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=2034343a33303a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33303a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000