syzkaller login: [ 31.055815] BUG: Bad rss-counter state mm:000000007352a320 type:MM_FILEPAGES val:33 [ 31.056821] BUG: Bad rss-counter state mm:000000007352a320 type:MM_ANONPAGES val:22 [ 31.232440] ================================================================== [ 31.233345] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.234306] Read of size 8 at addr ffff888015dfd4e0 by task sshd/221 [ 31.235138] [ 31.235382] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237295] Call Trace: [ 31.237630] [ 31.237913] dump_stack_lvl+0x91/0xf0 [ 31.238408] print_report+0xcc/0x620 [ 31.238970] ? __virt_addr_valid+0x102/0x340 [ 31.239622] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240246] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240888] kasan_report+0xbe/0xf0 [ 31.241369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242090] vma_interval_tree_remove+0xc75/0xec0 [ 31.242697] vma_prepare+0xc54/0x11a0 [ 31.243183] __split_vma+0x5af/0x950 [ 31.243666] ? __pfx___split_vma+0x10/0x10 [ 31.244204] ? find_held_lock+0x2c/0x110 [ 31.244739] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.245399] ? lock_is_held_type+0x9f/0x120 [ 31.246043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.246661] ? mtree_range_walk+0x632/0x900 [ 31.247228] ? mas_walk+0x5c7/0x7c0 [ 31.247710] do_vmi_munmap+0x1f1/0x2b0 [ 31.248211] mmap_region+0x1f9/0x2660 [ 31.248700] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.249219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.249959] ? __pfx_lock_acquire+0x10/0x10 [ 31.250502] ? __pfx_mmap_region+0x10/0x10 [ 31.251035] ? security_mmap_addr+0x7d/0xa0 [ 31.251575] ? get_unmapped_area+0x1f5/0x3f0 [ 31.252191] do_mmap+0x854/0xf00 [ 31.252755] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.253295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.253879] ksys_mmap_pgoff+0x3af/0x500 [ 31.254394] do_syscall_64+0x3f/0x90 [ 31.254884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255533] RIP: 0033:0x7fe42732ad82 [ 31.255999] 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 [ 31.258225] RSP: 002b:00007ffc8af24dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.259290] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe42732ad82 [ 31.260161] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe426764000 [ 31.261028] RBP: 00007fe426764000 R08: 0000000000000009 R09: 0000000000001000 [ 31.262011] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c78bfcef60 [ 31.262872] R13: 00007ffc8af24de0 R14: 00007ffc8af24e10 R15: 00007ffc8af25170 [ 31.263737] [ 31.264033] [ 31.264251] Allocated by task 214: [ 31.264680] kasan_save_stack+0x22/0x50 [ 31.265210] kasan_set_track+0x25/0x30 [ 31.265863] __kasan_slab_alloc+0x59/0x70 [ 31.266396] kmem_cache_alloc+0x16b/0x370 [ 31.266910] vm_area_dup+0x20/0x160 [ 31.267368] __split_vma+0x170/0x950 [ 31.267842] split_vma+0xc6/0x110 [ 31.268291] mprotect_fixup+0x8d2/0xb30 [ 31.268796] do_mprotect_pkey+0x87e/0xd40 [ 31.269325] __x64_sys_mprotect+0x78/0xc0 [ 31.269864] do_syscall_64+0x3f/0x90 [ 31.270351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271016] [ 31.271236] Freed by task 19: [ 31.271694] kasan_save_stack+0x22/0x50 [ 31.272279] kasan_set_track+0x25/0x30 [ 31.272863] kasan_save_free_info+0x2b/0x50 [ 31.273407] __kasan_slab_free+0x10a/0x190 [ 31.273957] kmem_cache_free+0x10d/0x4d0 [ 31.274470] rcu_core+0x8c8/0x2860 [ 31.274920] __do_softirq+0x1b7/0x7d4 [ 31.275405] [ 31.275622] Last potentially related work creation: [ 31.276208] kasan_save_stack+0x22/0x50 [ 31.276795] __kasan_record_aux_stack+0x8e/0xa0 [ 31.277377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.278033] remove_vma+0x139/0x170 [ 31.278483] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.279045] do_vmi_munmap+0x1f1/0x2b0 [ 31.279540] __vm_munmap+0x138/0x3a0 [ 31.280014] __x64_sys_munmap+0x59/0x80 [ 31.280669] do_syscall_64+0x3f/0x90 [ 31.281153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281806] [ 31.282030] The buggy address belongs to the object at ffff888015dfd488 [ 31.282030] which belongs to the cache vm_area_struct of size 168 [ 31.283539] The buggy address is located 88 bytes inside of [ 31.283539] freed 168-byte region [ffff888015dfd488, ffff888015dfd530) [ 31.284966] [ 31.285185] The buggy address belongs to the physical page: [ 31.285957] page:000000006fe26114 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15dfd [ 31.287076] memcg:ffff88800ea5aa01 [ 31.287513] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.288172] page_type: 0xffffffff() [ 31.288621] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.289567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea5aa01 [ 31.290665] page dumped because: kasan: bad access detected [ 31.291344] [ 31.291559] Memory state around the buggy address: [ 31.292145] ffff888015dfd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.293013] ffff888015dfd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.293897] >ffff888015dfd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.294755] ^ [ 31.295513] ffff888015dfd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.296387] ffff888015dfd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297238] ================================================================== [ 31.298304] Disabling lock debugging due to kernel taint [ 33.694268] BUG: Bad rss-counter state mm:000000005f365f58 type:MM_FILEPAGES val:33 [ 33.695282] BUG: Bad rss-counter state mm:000000005f365f58 type:MM_ANONPAGES val:22 [ 34.181663] BUG: Bad rss-counter state mm:00000000b178cf5e type:MM_FILEPAGES val:33 [ 34.182672] BUG: Bad rss-counter state mm:00000000b178cf5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19028' (ECDSA) to the list of known hosts. 2023/06/20 19:37:25 fuzzer started 2023/06/20 19:37:25 dialing manager at localhost:36067 2023/06/20 19:37:25 checking machine... 2023/06/20 19:37:25 checking revisions... [ 34.883921] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:37:25 testing simple program... [ 34.930982] cgroup: Unknown subsys name 'net' [ 35.002763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d89c720 RCX=ffff88800844f780 RDX=ffffea00004e4840 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88800e9c7768 R8 =ffff888013921260 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88800e9c77a8 R14=ffff88800844f780 R15=ffff888013921980 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f787dad1700 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=00007f7c703900b0 CR3=0000000019fa6000 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=2035323a37333a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a37333a3931203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007f9d3759f000 CR3=000000000d634000 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=85a28b216358ffa503457f2415dcd905 XMM02=000000000011a7b8ec2efd57dc4c00df XMM03=0000000000121c58053a5fb2724804a5 XMM04=425bb0d842dd816000000000000ae988 XMM05=0356d921961397c30000000000132920 XMM06=00c3ffa147b8d85700000000001319c0 XMM07=e042d86d42eb936e0000000000121ed8 XMM08=053a5fb2724804a5000000000011a818 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000