syzkaller login: [ 38.267435] BUG: Bad rss-counter state mm:00000000b34f8edd type:MM_FILEPAGES val:33 [ 38.268621] BUG: Bad rss-counter state mm:00000000b34f8edd type:MM_ANONPAGES val:22 [ 38.312529] ================================================================== [ 38.313788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.314811] Read of size 8 at addr ffff88801685d4e0 by task sshd/220 [ 38.315685] [ 38.315928] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.316941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.318020] Call Trace: [ 38.318368] [ 38.318683] dump_stack_lvl+0x91/0xf0 [ 38.319244] print_report+0xcc/0x620 [ 38.319846] ? __virt_addr_valid+0x102/0x340 [ 38.320471] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.321209] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.321960] kasan_report+0xbe/0xf0 [ 38.322509] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.323231] vma_interval_tree_remove+0xc75/0xec0 [ 38.323943] vma_prepare+0xc54/0x11a0 [ 38.324492] __split_vma+0x5af/0x950 [ 38.325124] ? __pfx___split_vma+0x10/0x10 [ 38.325772] ? find_held_lock+0x2c/0x110 [ 38.326386] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.327033] ? lock_is_held_type+0x9f/0x120 [ 38.327657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.328367] ? mtree_range_walk+0x632/0x900 [ 38.329022] ? mas_walk+0x5c7/0x7c0 [ 38.329569] do_vmi_munmap+0x1f1/0x2b0 [ 38.330143] mmap_region+0x1f9/0x2660 [ 38.330709] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.331300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.332134] ? __pfx_lock_acquire+0x10/0x10 [ 38.332762] ? __pfx_mmap_region+0x10/0x10 [ 38.333393] ? security_mmap_addr+0x7d/0xa0 [ 38.334016] ? get_unmapped_area+0x1f5/0x3f0 [ 38.334671] do_mmap+0x854/0xf00 [ 38.335188] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.335777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.336434] ksys_mmap_pgoff+0x3af/0x500 [ 38.337058] do_syscall_64+0x3f/0x90 [ 38.337619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.338379] RIP: 0033:0x7f92b3edad82 [ 38.338920] 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 [ 38.341430] RSP: 002b:00007fff67b26298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.342477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92b3edad82 [ 38.343497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92b3314000 [ 38.344408] RBP: 00007f92b3314000 R08: 0000000000000009 R09: 0000000000001000 [ 38.345341] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588a0440ec0 [ 38.346349] R13: 00007fff67b262b0 R14: 00007fff67b262e0 R15: 00007fff67b26640 [ 38.347388] [ 38.347741] [ 38.348002] Allocated by task 213: [ 38.348526] kasan_save_stack+0x22/0x50 [ 38.349152] kasan_set_track+0x25/0x30 [ 38.349755] __kasan_slab_alloc+0x59/0x70 [ 38.350380] kmem_cache_alloc+0x16b/0x370 [ 38.351020] vm_area_dup+0x20/0x160 [ 38.351586] __split_vma+0x170/0x950 [ 38.352149] split_vma+0xc6/0x110 [ 38.352682] mprotect_fixup+0x8d2/0xb30 [ 38.353352] do_mprotect_pkey+0x87e/0xd40 [ 38.354003] __x64_sys_mprotect+0x78/0xc0 [ 38.354516] do_syscall_64+0x3f/0x90 [ 38.354995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.355634] [ 38.355847] Freed by task 13: [ 38.356232] kasan_save_stack+0x22/0x50 [ 38.356734] kasan_set_track+0x25/0x30 [ 38.357248] kasan_save_free_info+0x2b/0x50 [ 38.357782] __kasan_slab_free+0x10a/0x190 [ 38.358310] kmem_cache_free+0x10d/0x4d0 [ 38.358820] rcu_core+0x8c8/0x2860 [ 38.359268] __do_softirq+0x1b7/0x7d4 [ 38.359743] [ 38.359956] Last potentially related work creation: [ 38.360545] kasan_save_stack+0x22/0x50 [ 38.361058] __kasan_record_aux_stack+0x8e/0xa0 [ 38.361626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.362267] remove_vma+0x139/0x170 [ 38.362720] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.363289] do_vmi_munmap+0x1f1/0x2b0 [ 38.363775] __vm_munmap+0x138/0x3a0 [ 38.364241] __x64_sys_munmap+0x59/0x80 [ 38.364740] do_syscall_64+0x3f/0x90 [ 38.365214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.365852] [ 38.366067] The buggy address belongs to the object at ffff88801685d488 [ 38.366067] which belongs to the cache vm_area_struct of size 168 [ 38.367535] The buggy address is located 88 bytes inside of [ 38.367535] freed 168-byte region [ffff88801685d488, ffff88801685d530) [ 38.368928] [ 38.369162] The buggy address belongs to the physical page: [ 38.369812] page:00000000b77d0074 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1685d [ 38.370891] memcg:ffff888015ac3801 [ 38.371319] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.371958] page_type: 0xffffffff() [ 38.372412] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.373342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ac3801 [ 38.374253] page dumped because: kasan: bad access detected [ 38.374918] [ 38.375136] Memory state around the buggy address: [ 38.375718] ffff88801685d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.376593] ffff88801685d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.377465] >ffff88801685d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.378326] ^ [ 38.379097] ffff88801685d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.379953] ffff88801685d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.380817] ================================================================== [ 38.381936] Disabling lock debugging due to kernel taint [ 40.957530] BUG: Bad rss-counter state mm:00000000c12b18b6 type:MM_FILEPAGES val:33 [ 40.958622] BUG: Bad rss-counter state mm:00000000c12b18b6 type:MM_ANONPAGES val:22 [ 41.421768] BUG: Bad rss-counter state mm:0000000099976daf type:MM_FILEPAGES val:33 [ 41.422962] BUG: Bad rss-counter state mm:0000000099976daf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19972' (ECDSA) to the list of known hosts. 2023/06/19 22:36:08 fuzzer started 2023/06/19 22:36:08 dialing manager at localhost:44161 2023/06/19 22:36:08 checking machine... 2023/06/19 22:36:08 checking revisions... [ 42.069310] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:36:08 testing simple program... [ 42.101252] cgroup: Unknown subsys name 'net' [ 42.149261] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:36:01 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888014739b40 RSI=ffffffff81efd93a RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888014707438 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000010000000 R13=0000000000000008 R14=000000000000002e R15=ffff8880147074b8 RIP=ffffffff814c07f1 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 00007fcbf7298900 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=00007fcbf66bfcf0 CR3=000000000d852000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b56e6baa91e2083600000000000ae988 XMM05=626cd2d112c9f8c40000000000136a20 XMM06=19e9129bd510f2350000000000135b68 XMM07=fb795ef6d65770560000000000126730 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a492659 RBX=dffffc0000000000 RCX=ffffffff812e00e5 RDX=1ffff110034924cc RSI=ffffffff87b86f80 RDI=ffff88801a4bfd80 RBP=ffff88801a492658 RSP=ffff888016df78c8 R8 =0000000000000001 R9 =ffffed1002dbef11 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801a4bfd78 R13=fffffbfff0f70df0 R14=0000000000000000 R15=ffffffff87b86f80 RIP=ffffffff844cc578 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff8a3177900 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=00007fff8c1f4000 CR3=000000000e2f4000 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