syzkaller login: [ 34.357028] BUG: Bad rss-counter state mm:000000001524523e type:MM_FILEPAGES val:33 [ 34.358691] BUG: Bad rss-counter state mm:000000001524523e type:MM_ANONPAGES val:22 [ 34.458740] ================================================================== [ 34.459249] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.459794] Read of size 8 at addr ffff88801a113b38 by task sshd/220 [ 34.460240] [ 34.460366] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.460870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.461458] Call Trace: [ 34.461641] [ 34.461809] dump_stack_lvl+0x91/0xf0 [ 34.462101] print_report+0xcc/0x620 [ 34.462387] ? __virt_addr_valid+0x102/0x340 [ 34.462711] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.463071] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.463439] kasan_report+0xbe/0xf0 [ 34.463701] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.464200] vma_interval_tree_remove+0xc75/0xec0 [ 34.464954] vma_prepare+0xc54/0x11a0 [ 34.465532] __split_vma+0x5af/0x950 [ 34.466116] ? __pfx___split_vma+0x10/0x10 [ 34.466418] ? find_held_lock+0x2c/0x110 [ 34.466702] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.467004] ? lock_is_held_type+0x9f/0x120 [ 34.467296] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.467622] ? mtree_range_walk+0x632/0x900 [ 34.467919] ? mas_walk+0x5c7/0x7c0 [ 34.468176] do_vmi_munmap+0x1f1/0x2b0 [ 34.468442] mmap_region+0x1f9/0x2660 [ 34.468703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.468987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.469390] ? __pfx_lock_acquire+0x10/0x10 [ 34.469700] ? __pfx_mmap_region+0x10/0x10 [ 34.470018] ? security_mmap_addr+0x7d/0xa0 [ 34.470328] ? get_unmapped_area+0x1f5/0x3f0 [ 34.470656] do_mmap+0x854/0xf00 [ 34.470911] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.471224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.471542] ksys_mmap_pgoff+0x3af/0x500 [ 34.471831] do_syscall_64+0x3f/0x90 [ 34.472113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.472485] RIP: 0033:0x7fc271d1fd82 [ 34.472746] 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 [ 34.473990] RSP: 002b:00007ffc649e2d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.474520] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc271d1fd82 [ 34.475010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc271159000 [ 34.475500] RBP: 00007fc271159000 R08: 0000000000000009 R09: 0000000000001000 [ 34.475991] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576464ddec0 [ 34.476483] R13: 00007ffc649e2d80 R14: 00007ffc649e2db0 R15: 00007ffc649e3110 [ 34.476973] [ 34.477141] [ 34.477263] Allocated by task 213: [ 34.477510] kasan_save_stack+0x22/0x50 [ 34.477810] kasan_set_track+0x25/0x30 [ 34.478094] __kasan_slab_alloc+0x59/0x70 [ 34.478395] kmem_cache_alloc+0x16b/0x370 [ 34.478691] vm_area_dup+0x20/0x160 [ 34.478950] __split_vma+0x170/0x950 [ 34.479218] split_vma+0xc6/0x110 [ 34.479467] mprotect_fixup+0x8d2/0xb30 [ 34.479755] do_mprotect_pkey+0x87e/0xd40 [ 34.480051] __x64_sys_mprotect+0x78/0xc0 [ 34.480347] do_syscall_64+0x3f/0x90 [ 34.480616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.480981] [ 34.481106] Freed by task 210: [ 34.481332] kasan_save_stack+0x22/0x50 [ 34.481616] kasan_set_track+0x25/0x30 [ 34.481902] kasan_save_free_info+0x2b/0x50 [ 34.482207] __kasan_slab_free+0x10a/0x190 [ 34.482515] kmem_cache_free+0x10d/0x4d0 [ 34.482806] rcu_core+0x8c8/0x2860 [ 34.483061] __do_softirq+0x1b7/0x7d4 [ 34.483335] [ 34.483456] Last potentially related work creation: [ 34.483790] kasan_save_stack+0x22/0x50 [ 34.484081] __kasan_record_aux_stack+0x8e/0xa0 [ 34.484409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.484776] remove_vma+0x139/0x170 [ 34.485035] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.485353] do_vmi_munmap+0x1f1/0x2b0 [ 34.485634] __vm_munmap+0x138/0x3a0 [ 34.485906] __x64_sys_munmap+0x59/0x80 [ 34.486190] do_syscall_64+0x3f/0x90 [ 34.486460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.486830] [ 34.486953] The buggy address belongs to the object at ffff88801a113ae0 [ 34.486953] which belongs to the cache vm_area_struct of size 168 [ 34.487799] The buggy address is located 88 bytes inside of [ 34.487799] freed 168-byte region [ffff88801a113ae0, ffff88801a113b88) [ 34.488608] [ 34.488732] The buggy address belongs to the physical page: [ 34.489111] page:000000004e5914b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a113 [ 34.489742] memcg:ffff888019eb5401 [ 34.489984] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.490356] page_type: 0xffffffff() [ 34.490612] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.491144] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eb5401 [ 34.491675] page dumped because: kasan: bad access detected [ 34.492055] [ 34.492178] Memory state around the buggy address: [ 34.492509] ffff88801a113a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.493002] ffff88801a113a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.493490] >ffff88801a113b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.493990] ^ [ 34.494344] ffff88801a113b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.494833] ffff88801a113c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.495325] ================================================================== [ 34.495847] Disabling lock debugging due to kernel taint [ 36.635455] BUG: Bad rss-counter state mm:0000000062462b37 type:MM_FILEPAGES val:33 [ 36.636433] BUG: Bad rss-counter state mm:0000000062462b37 type:MM_ANONPAGES val:22 [ 37.070154] BUG: Bad rss-counter state mm:00000000be2b9a61 type:MM_FILEPAGES val:33 [ 37.071326] BUG: Bad rss-counter state mm:00000000be2b9a61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4654' (ECDSA) to the list of known hosts. 2023/06/20 02:13:17 fuzzer started 2023/06/20 02:13:17 dialing manager at localhost:44161 2023/06/20 02:13:17 checking machine... 2023/06/20 02:13:17 checking revisions... [ 37.682768] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:13:17 testing simple program... [ 37.731432] cgroup: Unknown subsys name 'net' [ 37.776820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:13:13 Registers: info registers vcpu 0 RAX=1ffff11001c48e39 RBX=ffff88800e247198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e2471c8 RBP=ffff88800ed45b80 RSP=ffff888017edfcf8 R8 =0000000000000001 R9 =ffffed1002fdbf93 R10=0000000000000003 R11=00000000000b6cb2 R12=dffffc0000000000 R13=ffff88800ed45b80 R14=ffffffff8186b9c5 R15=ffff888019d3e080 RIP=ffffffff8184636c RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fef47ca6900 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=00007ffda3a8b000 CR3=000000000fd12000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffb17cec9f0 CR3=0000000013a50000 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=3e4e5d710f0a799a6c4c6a6d921940f8 XMM02=ec2efd57dc4c00df000000000011fb88 XMM03=c59d32771a92e2dd000000000011fc58 XMM04=176ddcb04526015c00000000000ae988 XMM05=f93a4a78a172e8da0000000000134c28 XMM06=4fda316b135da52b0000000000133cc8 XMM07=e042d86d42eb936e0000000000124560 XMM08=c59d32771a92e2dd000000000011fc58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000