syzkaller login: [ 38.647517] BUG: Bad rss-counter state mm:0000000010975e55 type:MM_FILEPAGES val:33 [ 38.648491] BUG: Bad rss-counter state mm:0000000010975e55 type:MM_ANONPAGES val:22 [ 38.747315] ================================================================== [ 38.747910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.748519] Read of size 8 at addr ffff88801a2cf798 by task sshd/219 [ 38.749018] [ 38.749159] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.749737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.750382] Call Trace: [ 38.750594] [ 38.750784] dump_stack_lvl+0x91/0xf0 [ 38.751115] print_report+0xcc/0x620 [ 38.751434] ? __virt_addr_valid+0x102/0x340 [ 38.751796] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.752201] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.752699] kasan_report+0xbe/0xf0 [ 38.753035] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.753454] vma_interval_tree_remove+0xc75/0xec0 [ 38.753856] vma_prepare+0xc54/0x11a0 [ 38.754179] __split_vma+0x5af/0x950 [ 38.754495] ? __pfx___split_vma+0x10/0x10 [ 38.754839] ? find_held_lock+0x2c/0x110 [ 38.755200] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.755577] ? lock_is_held_type+0x9f/0x120 [ 38.755937] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.756341] ? mtree_range_walk+0x632/0x900 [ 38.756702] ? mas_walk+0x5c7/0x7c0 [ 38.757017] do_vmi_munmap+0x1f1/0x2b0 [ 38.757348] mmap_region+0x1f9/0x2660 [ 38.757676] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.758010] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.758473] ? __pfx_lock_acquire+0x10/0x10 [ 38.758821] ? __pfx_mmap_region+0x10/0x10 [ 38.759159] ? security_mmap_addr+0x7d/0xa0 [ 38.759501] ? get_unmapped_area+0x1f5/0x3f0 [ 38.759853] do_mmap+0x854/0xf00 [ 38.760137] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.760455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.760812] ksys_mmap_pgoff+0x3af/0x500 [ 38.761138] do_syscall_64+0x3f/0x90 [ 38.761442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.761865] RIP: 0033:0x7fe1c7dd4d82 [ 38.762158] 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 [ 38.763545] RSP: 002b:00007ffd49a5fae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.764136] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1c7dd4d82 [ 38.764686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1c720e000 [ 38.765229] RBP: 00007fe1c720e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.765786] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb562c3ec0 [ 38.766335] R13: 00007ffd49a5fb00 R14: 00007ffd49a5fb30 R15: 00007ffd49a5fe90 [ 38.766898] [ 38.767091] [ 38.767228] Allocated by task 212: [ 38.767508] kasan_save_stack+0x22/0x50 [ 38.767829] kasan_set_track+0x25/0x30 [ 38.768144] __kasan_slab_alloc+0x59/0x70 [ 38.768483] kmem_cache_alloc+0x16b/0x370 [ 38.768812] vm_area_dup+0x20/0x160 [ 38.769104] __split_vma+0x170/0x950 [ 38.769400] split_vma+0xc6/0x110 [ 38.769701] mprotect_fixup+0x8d2/0xb30 [ 38.770023] do_mprotect_pkey+0x87e/0xd40 [ 38.770365] __x64_sys_mprotect+0x78/0xc0 [ 38.770701] do_syscall_64+0x3f/0x90 [ 38.771003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.771422] [ 38.771562] Freed by task 19: [ 38.771811] kasan_save_stack+0x22/0x50 [ 38.772135] kasan_set_track+0x25/0x30 [ 38.772451] kasan_save_free_info+0x2b/0x50 [ 38.772801] __kasan_slab_free+0x10a/0x190 [ 38.773144] kmem_cache_free+0x10d/0x4d0 [ 38.773468] rcu_core+0x8c8/0x2860 [ 38.773765] __do_softirq+0x1b7/0x7d4 [ 38.774077] [ 38.774220] Last potentially related work creation: [ 38.774598] kasan_save_stack+0x22/0x50 [ 38.774921] __kasan_record_aux_stack+0x8e/0xa0 [ 38.775289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.775706] remove_vma+0x139/0x170 [ 38.775994] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.776351] do_vmi_munmap+0x1f1/0x2b0 [ 38.776659] __vm_munmap+0x138/0x3a0 [ 38.776958] __x64_sys_munmap+0x59/0x80 [ 38.777276] do_syscall_64+0x3f/0x90 [ 38.777591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.778011] [ 38.778149] The buggy address belongs to the object at ffff88801a2cf740 [ 38.778149] which belongs to the cache vm_area_struct of size 168 [ 38.779095] The buggy address is located 88 bytes inside of [ 38.779095] freed 168-byte region [ffff88801a2cf740, ffff88801a2cf7e8) [ 38.780008] [ 38.780147] The buggy address belongs to the physical page: [ 38.780572] page:00000000db471ec1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2cf [ 38.781274] memcg:ffff888009a44c01 [ 38.781550] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.781975] page_type: 0xffffffff() [ 38.782264] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.782858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a44c01 [ 38.783444] page dumped because: kasan: bad access detected [ 38.783872] [ 38.784008] Memory state around the buggy address: [ 38.784385] ffff88801a2cf680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.784945] ffff88801a2cf700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.785492] >ffff88801a2cf780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.786064] ^ [ 38.786383] ffff88801a2cf800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.786938] ffff88801a2cf880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.787487] ================================================================== [ 38.788099] Disabling lock debugging due to kernel taint [ 40.587045] BUG: Bad rss-counter state mm:000000008c302bd5 type:MM_FILEPAGES val:33 [ 40.588678] BUG: Bad rss-counter state mm:000000008c302bd5 type:MM_ANONPAGES val:22 [ 41.148691] BUG: Bad rss-counter state mm:00000000463d860d type:MM_FILEPAGES val:33 [ 41.149859] BUG: Bad rss-counter state mm:00000000463d860d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38949' (ECDSA) to the list of known hosts. 2023/06/21 01:41:13 fuzzer started 2023/06/21 01:41:13 dialing manager at localhost:36067 2023/06/21 01:41:13 checking machine... 2023/06/21 01:41:13 checking revisions... [ 41.810648] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:41:13 testing simple program... [ 41.859659] cgroup: Unknown subsys name 'net' [ 41.907918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:41:13 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc09 RBX=ffffffff85dfe048 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88806ce099e0 R8 =ffffffff86138eb0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe060 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 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=00007f9c6d78ccd0 CR3=000000000d75e000 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=c2d9dea11be17885ed4fbe3167e3aef5 XMM02=000000000011b5e8ec2efd57dc4c00df XMM03=0000000000121f88f0aed017fa10a8f5 XMM04=3f7fc7aff464d90a00000000000ae988 XMM05=dfcdbad4f1609c370000000000131a80 XMM06=b25deb5b09a673d70000000000130c58 XMM07=e042d86d42eb936e0000000000122260 XMM08=f0aed017fa10a8f5000000000011b648 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001b2cfa2 RCX=ffffffff8363df7e RDX=ffff888017ed51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d967d00 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000c R11=0000000000000000 R12=000000000000000c R13=00007ffcc7beff2c R14=ffff8880199af8c0 R15=0000000000000000 RIP=ffffffff814c027c 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 00007f0bffe3e900 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=00007ffcc7bf1000 CR3=000000000ec62000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000