syzkaller login: [ 60.944641] BUG: Bad rss-counter state mm:00000000870059a7 type:MM_FILEPAGES val:33 [ 60.946562] BUG: Bad rss-counter state mm:00000000870059a7 type:MM_ANONPAGES val:22 [ 61.110987] ================================================================== [ 61.112098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.113442] Read of size 8 at addr ffff88800ee1b140 by task sshd/222 [ 61.114220] [ 61.114442] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 61.115468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.116430] Call Trace: [ 61.116747] [ 61.117044] dump_stack_lvl+0x91/0xf0 [ 61.117540] print_report+0xcc/0x620 [ 61.118033] ? __virt_addr_valid+0x102/0x340 [ 61.118594] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.119217] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.119831] kasan_report+0xbe/0xf0 [ 61.120314] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.120947] vma_interval_tree_remove+0xc75/0xec0 [ 61.121555] vma_prepare+0xc54/0x11a0 [ 61.122056] __split_vma+0x5af/0x950 [ 61.122547] ? __pfx___split_vma+0x10/0x10 [ 61.123081] ? find_held_lock+0x2c/0x110 [ 61.123609] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.124178] ? lock_is_held_type+0x9f/0x120 [ 61.124733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.125378] ? mtree_range_walk+0x632/0x900 [ 61.125929] ? mas_walk+0x5c7/0x7c0 [ 61.126411] do_vmi_munmap+0x1f1/0x2b0 [ 61.126906] mmap_region+0x1f9/0x2660 [ 61.127392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.127917] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.128632] ? __pfx_lock_acquire+0x10/0x10 [ 61.129172] ? __pfx_mmap_region+0x10/0x10 [ 61.129701] ? security_mmap_addr+0x7d/0xa0 [ 61.130236] ? get_unmapped_area+0x1f5/0x3f0 [ 61.130782] do_mmap+0x854/0xf00 [ 61.131218] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.131723] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.132284] ksys_mmap_pgoff+0x3af/0x500 [ 61.132788] do_syscall_64+0x3f/0x90 [ 61.133274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.133921] RIP: 0033:0x7fc1564a9d82 [ 61.134380] 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 [ 61.136497] RSP: 002b:00007fff75b5ad68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.137598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1564a9d82 [ 61.138535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1558e3000 [ 61.139385] RBP: 00007fc1558e3000 R08: 0000000000000009 R09: 0000000000001000 [ 61.140234] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c02ef11ec0 [ 61.141098] R13: 00007fff75b5ad80 R14: 00007fff75b5adb0 R15: 00007fff75b5b110 [ 61.142133] [ 61.142506] [ 61.142775] Allocated by task 215: [ 61.143305] kasan_save_stack+0x22/0x50 [ 61.143917] kasan_set_track+0x25/0x30 [ 61.144510] __kasan_slab_alloc+0x59/0x70 [ 61.145165] kmem_cache_alloc+0x16b/0x370 [ 61.145799] vm_area_dup+0x20/0x160 [ 61.146362] __split_vma+0x170/0x950 [ 61.146935] split_vma+0xc6/0x110 [ 61.147469] mprotect_fixup+0x8d2/0xb30 [ 61.148085] do_mprotect_pkey+0x87e/0xd40 [ 61.148730] __x64_sys_mprotect+0x78/0xc0 [ 61.149388] do_syscall_64+0x3f/0x90 [ 61.149977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.150761] [ 61.151019] Freed by task 19: [ 61.151485] kasan_save_stack+0x22/0x50 [ 61.152091] kasan_set_track+0x25/0x30 [ 61.152689] kasan_save_free_info+0x2b/0x50 [ 61.153348] __kasan_slab_free+0x10a/0x190 [ 61.153999] kmem_cache_free+0x10d/0x4d0 [ 61.154616] rcu_core+0x8c8/0x2860 [ 61.155159] __do_softirq+0x1b7/0x7d4 [ 61.155823] [ 61.156076] Last potentially related work creation: [ 61.156794] kasan_save_stack+0x22/0x50 [ 61.157438] __kasan_record_aux_stack+0x8e/0xa0 [ 61.158144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.158924] remove_vma+0x139/0x170 [ 61.159471] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.160159] do_vmi_munmap+0x1f1/0x2b0 [ 61.160750] __vm_munmap+0x138/0x3a0 [ 61.161318] __x64_sys_munmap+0x59/0x80 [ 61.161890] do_syscall_64+0x3f/0x90 [ 61.162340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.162952] [ 61.163161] The buggy address belongs to the object at ffff88800ee1b0e8 [ 61.163161] which belongs to the cache vm_area_struct of size 168 [ 61.164554] The buggy address is located 88 bytes inside of [ 61.164554] freed 168-byte region [ffff88800ee1b0e8, ffff88800ee1b190) [ 61.165883] [ 61.166090] The buggy address belongs to the physical page: [ 61.166710] page:000000000330c487 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee1b [ 61.167731] memcg:ffff88800f07ef01 [ 61.168132] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.168784] page_type: 0xffffffff() [ 61.169267] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.170192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f07ef01 [ 61.171118] page dumped because: kasan: bad access detected [ 61.171783] [ 61.171998] Memory state around the buggy address: [ 61.172576] ffff88800ee1b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.173465] ffff88800ee1b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 61.174415] >ffff88800ee1b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.175365] ^ [ 61.176070] ffff88800ee1b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 61.177028] ffff88800ee1b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 61.177974] ================================================================== [ 61.178999] Disabling lock debugging due to kernel taint [ 64.110250] BUG: Bad rss-counter state mm:000000002504cd7d type:MM_FILEPAGES val:33 [ 64.111221] BUG: Bad rss-counter state mm:000000002504cd7d type:MM_ANONPAGES val:22 [ 64.652443] BUG: Bad rss-counter state mm:00000000ae09d8cf type:MM_FILEPAGES val:33 [ 64.653647] BUG: Bad rss-counter state mm:00000000ae09d8cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12491' (ECDSA) to the list of known hosts. 2023/06/19 18:29:41 fuzzer started 2023/06/19 18:29:41 dialing manager at localhost:44161 2023/06/19 18:29:41 checking machine... 2023/06/19 18:29:41 checking revisions... [ 65.278957] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:29:41 testing simple program... [ 65.338233] cgroup: Unknown subsys name 'net' [ 65.408197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c13ae RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88806ce09d58 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85616758 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f2c2389b900 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=00007f183f43d650 CR3=000000000c5c0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=df41037c64f558ad00000000000ae988 XMM05=5b88aef5f67da7b90000000000139480 XMM06=00c3ffa147b8d8570000000000138270 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8153425b RDX=1ffff1100d9e747b RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81371069 RSP=ffff888016e8fde8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000035 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f183ee88900 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=00007ffcd68f5000 CR3=000000000e664000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000