syzkaller login: [ 42.791047] BUG: Bad rss-counter state mm:00000000bd2edd7e type:MM_FILEPAGES val:32 [ 42.792783] BUG: Bad rss-counter state mm:00000000bd2edd7e type:MM_ANONPAGES val:22 [ 42.898098] ================================================================== [ 42.898742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.899414] Read of size 8 at addr ffff88800ef3d058 by task sshd/219 [ 42.899953] [ 42.900110] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.900732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.901415] Call Trace: [ 42.901645] [ 42.901850] dump_stack_lvl+0x91/0xf0 [ 42.902396] print_report+0xcc/0x620 [ 42.902768] ? __virt_addr_valid+0x102/0x340 [ 42.903159] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.903599] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.904040] kasan_report+0xbe/0xf0 [ 42.904380] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.904861] vma_interval_tree_remove+0xc75/0xec0 [ 42.905290] vma_prepare+0xc54/0x11a0 [ 42.905603] __split_vma+0x5af/0x950 [ 42.905894] ? __pfx___split_vma+0x10/0x10 [ 42.906219] ? find_held_lock+0x2c/0x110 [ 42.906536] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.906880] ? lock_is_held_type+0x9f/0x120 [ 42.907207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.907576] ? mtree_range_walk+0x632/0x900 [ 42.907911] ? mas_walk+0x5c7/0x7c0 [ 42.908198] do_vmi_munmap+0x1f1/0x2b0 [ 42.908505] mmap_region+0x1f9/0x2660 [ 42.908805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.909118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.909557] ? __pfx_lock_acquire+0x10/0x10 [ 42.909887] ? __pfx_mmap_region+0x10/0x10 [ 42.910210] ? security_mmap_addr+0x7d/0xa0 [ 42.910534] ? get_unmapped_area+0x1f5/0x3f0 [ 42.910872] do_mmap+0x854/0xf00 [ 42.911143] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.911443] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.911784] ksys_mmap_pgoff+0x3af/0x500 [ 42.912091] do_syscall_64+0x3f/0x90 [ 42.912382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.912793] RIP: 0033:0x7f5358fced82 [ 42.913076] 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 [ 42.914358] RSP: 002b:00007ffe9303b3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.914910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5358fced82 [ 42.915419] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5358408000 [ 42.915932] RBP: 00007f5358408000 R08: 0000000000000009 R09: 0000000000001000 [ 42.916445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad93901f70 [ 42.916968] R13: 00007ffe9303b3d0 R14: 00007ffe9303b400 R15: 00007ffe9303b760 [ 42.917486] [ 42.917663] [ 42.917795] Allocated by task 212: [ 42.918055] kasan_save_stack+0x22/0x50 [ 42.918363] kasan_set_track+0x25/0x30 [ 42.918663] __kasan_slab_alloc+0x59/0x70 [ 42.918983] kmem_cache_alloc+0x16b/0x370 [ 42.919298] vm_area_dup+0x20/0x160 [ 42.919576] __split_vma+0x170/0x950 [ 42.919862] split_vma+0xc6/0x110 [ 42.920129] mprotect_fixup+0x8d2/0xb30 [ 42.920433] do_mprotect_pkey+0x87e/0xd40 [ 42.920761] __x64_sys_mprotect+0x78/0xc0 [ 42.921080] do_syscall_64+0x3f/0x90 [ 42.921365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.921756] [ 42.921889] Freed by task 19: [ 42.922123] kasan_save_stack+0x22/0x50 [ 42.922428] kasan_set_track+0x25/0x30 [ 42.922729] kasan_save_free_info+0x2b/0x50 [ 42.923051] __kasan_slab_free+0x10a/0x190 [ 42.923374] kmem_cache_free+0x10d/0x4d0 [ 42.923682] rcu_core+0x8c8/0x2860 [ 42.923953] __do_softirq+0x1b7/0x7d4 [ 42.924243] [ 42.924374] Last potentially related work creation: [ 42.924733] kasan_save_stack+0x22/0x50 [ 42.925042] __kasan_record_aux_stack+0x8e/0xa0 [ 42.925390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.925781] remove_vma+0x139/0x170 [ 42.926058] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.926396] do_vmi_munmap+0x1f1/0x2b0 [ 42.926690] __vm_munmap+0x138/0x3a0 [ 42.926977] __x64_sys_munmap+0x59/0x80 [ 42.927277] do_syscall_64+0x3f/0x90 [ 42.927565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.927959] [ 42.928090] Second to last potentially related work creation: [ 42.928508] kasan_save_stack+0x22/0x50 [ 42.928815] __kasan_record_aux_stack+0x8e/0xa0 [ 42.929162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.929551] remove_vma+0x139/0x170 [ 42.929825] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.930162] do_vmi_munmap+0x1f1/0x2b0 [ 42.930457] mmap_region+0x1f9/0x2660 [ 42.930745] do_mmap+0x854/0xf00 [ 42.931007] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.931305] ksys_mmap_pgoff+0x3af/0x500 [ 42.931608] do_syscall_64+0x3f/0x90 [ 42.931895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.932285] [ 42.932418] The buggy address belongs to the object at ffff88800ef3d000 [ 42.932418] which belongs to the cache vm_area_struct of size 168 [ 42.933317] The buggy address is located 88 bytes inside of [ 42.933317] freed 168-byte region [ffff88800ef3d000, ffff88800ef3d0a8) [ 42.934163] [ 42.934299] The buggy address belongs to the physical page: [ 42.934699] page:00000000d83c3e65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef3d [ 42.935353] memcg:ffff88800ee84401 [ 42.935613] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.936005] page_type: 0xffffffff() [ 42.936278] raw: 0100000000000200 ffff88800879fc80 ffffea0000361440 dead000000000002 [ 42.936837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee84401 [ 42.937387] page dumped because: kasan: bad access detected [ 42.937785] [ 42.937917] Memory state around the buggy address: [ 42.938268] ffff88800ef3cf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 42.938781] ffff88800ef3cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.939295] >ffff88800ef3d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.939822] ^ [ 42.940258] ffff88800ef3d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 42.940799] ffff88800ef3d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.941316] ================================================================== [ 42.941924] Disabling lock debugging due to kernel taint [ 44.997121] BUG: Bad rss-counter state mm:00000000b9045984 type:MM_FILEPAGES val:33 [ 44.998231] BUG: Bad rss-counter state mm:00000000b9045984 type:MM_ANONPAGES val:22 [ 45.456151] BUG: Bad rss-counter state mm:00000000819a7c5d type:MM_FILEPAGES val:33 [ 45.456906] BUG: Bad rss-counter state mm:00000000819a7c5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9801' (ECDSA) to the list of known hosts. 2023/06/20 03:54:51 fuzzer started 2023/06/20 03:54:51 dialing manager at localhost:44161 2023/06/20 03:54:51 checking machine... 2023/06/20 03:54:51 checking revisions... [ 46.089701] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:54:51 testing simple program... [ 46.130289] cgroup: Unknown subsys name 'net' [ 46.174040] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000340 RCX=ffffffff8162f5d4 RDX=ffff888018143680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea00005f0c40 RSP=ffff88801836fb40 R8 =0000000000000006 R9 =0000000000000340 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88801836fe00 R15=dffffc0000000000 RIP=ffffffff814c0388 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 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=00007f5685a678e0 CR3=0000000009d2c000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e6c69747562696c2f756e672d78 XMM02=00312e6f732e6c69747562696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09f80 RCX=0000000000000002 RDX=1ffff1100d9e1355 RSI=ffff88806cf09f50 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f50 R15=ffff88806cf09a98 RIP=ffffffff81131cac 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 00007ff0bd66e900 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=00007ffe2fa9c000 CR3=000000001ccb4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000