syzkaller login: [ 30.299326] BUG: Bad rss-counter state mm:0000000075184bdf type:MM_FILEPAGES val:33 [ 30.300685] BUG: Bad rss-counter state mm:0000000075184bdf type:MM_ANONPAGES val:22 [ 30.340699] ================================================================== [ 30.341617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.342681] Read of size 8 at addr ffff8880169a9d08 by task sshd/220 [ 30.343451] [ 30.343667] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.344565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.345561] Call Trace: [ 30.345882] [ 30.346177] dump_stack_lvl+0x91/0xf0 [ 30.346695] print_report+0xcc/0x620 [ 30.347203] ? __virt_addr_valid+0x102/0x340 [ 30.347788] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.348433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349074] kasan_report+0xbe/0xf0 [ 30.349571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.350213] vma_interval_tree_remove+0xc75/0xec0 [ 30.350868] vma_prepare+0xc54/0x11a0 [ 30.351361] __split_vma+0x5af/0x950 [ 30.351831] ? __pfx___split_vma+0x10/0x10 [ 30.352365] ? find_held_lock+0x2c/0x110 [ 30.352915] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.353498] ? lock_is_held_type+0x9f/0x120 [ 30.354066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.354704] ? mtree_range_walk+0x632/0x900 [ 30.355276] ? mas_walk+0x5c7/0x7c0 [ 30.355771] do_vmi_munmap+0x1f1/0x2b0 [ 30.356282] mmap_region+0x1f9/0x2660 [ 30.356789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.357324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.358071] ? __pfx_lock_acquire+0x10/0x10 [ 30.358640] ? __pfx_mmap_region+0x10/0x10 [ 30.359189] ? security_mmap_addr+0x7d/0xa0 [ 30.359740] ? get_unmapped_area+0x1f5/0x3f0 [ 30.360315] do_mmap+0x854/0xf00 [ 30.360769] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.361277] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.361859] ksys_mmap_pgoff+0x3af/0x500 [ 30.362391] do_syscall_64+0x3f/0x90 [ 30.362886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.363539] RIP: 0033:0x7f15772a4d82 [ 30.363996] 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 [ 30.366119] RSP: 002b:00007ffd3349ebc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.367046] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15772a4d82 [ 30.367916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15766de000 [ 30.368807] RBP: 00007f15766de000 R08: 0000000000000009 R09: 0000000000001000 [ 30.369700] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641ad503ec0 [ 30.370597] R13: 00007ffd3349ebe0 R14: 00007ffd3349ec10 R15: 00007ffd3349ef70 [ 30.371501] [ 30.371806] [ 30.372031] Allocated by task 213: [ 30.372481] kasan_save_stack+0x22/0x50 [ 30.373002] kasan_set_track+0x25/0x30 [ 30.373511] __kasan_slab_alloc+0x59/0x70 [ 30.374056] kmem_cache_alloc+0x16b/0x370 [ 30.374621] vm_area_dup+0x20/0x160 [ 30.375103] __split_vma+0x170/0x950 [ 30.375598] split_vma+0xc6/0x110 [ 30.376054] mprotect_fixup+0x8d2/0xb30 [ 30.376574] do_mprotect_pkey+0x87e/0xd40 [ 30.377110] __x64_sys_mprotect+0x78/0xc0 [ 30.377651] do_syscall_64+0x3f/0x90 [ 30.378145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.378817] [ 30.379041] Freed by task 213: [ 30.379448] kasan_save_stack+0x22/0x50 [ 30.379969] kasan_set_track+0x25/0x30 [ 30.380481] kasan_save_free_info+0x2b/0x50 [ 30.381031] __kasan_slab_free+0x10a/0x190 [ 30.381587] kmem_cache_free+0x10d/0x4d0 [ 30.382117] rcu_core+0x8c8/0x2860 [ 30.382578] __do_softirq+0x1b7/0x7d4 [ 30.383074] [ 30.383314] Last potentially related work creation: [ 30.383923] kasan_save_stack+0x22/0x50 [ 30.384441] __kasan_record_aux_stack+0x8e/0xa0 [ 30.385038] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.385708] remove_vma+0x139/0x170 [ 30.386176] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.386779] do_vmi_munmap+0x1f1/0x2b0 [ 30.387282] __vm_munmap+0x138/0x3a0 [ 30.387775] __x64_sys_munmap+0x59/0x80 [ 30.388292] do_syscall_64+0x3f/0x90 [ 30.388784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.389448] [ 30.389667] The buggy address belongs to the object at ffff8880169a9cb0 [ 30.389667] which belongs to the cache vm_area_struct of size 168 [ 30.391197] The buggy address is located 88 bytes inside of [ 30.391197] freed 168-byte region [ffff8880169a9cb0, ffff8880169a9d58) [ 30.392673] [ 30.392894] The buggy address belongs to the physical page: [ 30.393582] page:000000002ea76970 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169a9 [ 30.394735] memcg:ffff88800d9a3a01 [ 30.395173] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.395852] page_type: 0xffffffff() [ 30.396320] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.397279] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9a3a01 [ 30.398217] page dumped because: kasan: bad access detected [ 30.398921] [ 30.399140] Memory state around the buggy address: [ 30.399743] ffff8880169a9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.400644] ffff8880169a9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.401539] >ffff8880169a9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.402430] ^ [ 30.402907] ffff8880169a9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.403801] ffff8880169a9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.404697] ================================================================== [ 30.405714] Disabling lock debugging due to kernel taint [ 32.686808] BUG: Bad rss-counter state mm:000000000a461f2d type:MM_FILEPAGES val:33 [ 32.688011] BUG: Bad rss-counter state mm:000000000a461f2d type:MM_ANONPAGES val:22 [ 33.271204] BUG: Bad rss-counter state mm:000000002b2f3b38 type:MM_FILEPAGES val:33 [ 33.272520] BUG: Bad rss-counter state mm:000000002b2f3b38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18984' (ECDSA) to the list of known hosts. 2023/06/21 07:37:00 fuzzer started 2023/06/21 07:37:01 dialing manager at localhost:36067 2023/06/21 07:37:01 checking machine... 2023/06/21 07:37:01 checking revisions... [ 33.887438] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:37:01 testing simple program... [ 33.921500] cgroup: Unknown subsys name 'net' [ 33.958028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:37:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015cc72e8 RCX=0000000000000001 RDX=1ffff11002b98e68 RSI=ffff888015cc7f48 RDI=ffffffff846000aa RBP=ffff888015cc7340 RSP=ffff888015cc72d0 R8 =0000000000000001 R9 =ffff888015cc7328 R10=0000000000038001 R11=00000000000b5080 R12=ffff888015cc73b0 R13=0000000000000000 R14=ffff888015d40000 R15=0000000000092820 RIP=ffffffff811303b2 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 00007fc2fb7c4700 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=00007f99cc4bde10 CR3=000000000fd4a000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323137 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880145d0000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff8880145d03f4 RBP=ffff8880145d0000 RSP=ffff88806cf09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f673f0466c3 R13=0000000000000000 R14=ffff8880145d0000 R15=ffff888015c85d00 RIP=ffffffff8135bdea RFL=00000217 [----APC] 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 00007f673eb63900 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=00007fffbe47e000 CR3=000000000cc16000 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