syzkaller login: [ 30.417532] BUG: Bad rss-counter state mm:000000005d205f81 type:MM_FILEPAGES val:33 [ 30.418794] BUG: Bad rss-counter state mm:000000005d205f81 type:MM_ANONPAGES val:22 [ 30.460186] ================================================================== [ 30.461255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.462496] Read of size 8 at addr ffff888019902228 by task sshd/220 [ 30.463402] [ 30.463660] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.464689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.465830] Call Trace: [ 30.466223] [ 30.466549] dump_stack_lvl+0x91/0xf0 [ 30.467108] print_report+0xcc/0x620 [ 30.467662] ? __virt_addr_valid+0x102/0x340 [ 30.468292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.469003] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.469704] kasan_report+0xbe/0xf0 [ 30.470256] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.470962] vma_interval_tree_remove+0xc75/0xec0 [ 30.471656] vma_prepare+0xc54/0x11a0 [ 30.472224] __split_vma+0x5af/0x950 [ 30.472787] ? __pfx___split_vma+0x10/0x10 [ 30.473416] ? find_held_lock+0x2c/0x110 [ 30.474047] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.474718] ? lock_is_held_type+0x9f/0x120 [ 30.475364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.476087] ? mtree_range_walk+0x632/0x900 [ 30.476738] ? mas_walk+0x5c7/0x7c0 [ 30.477304] do_vmi_munmap+0x1f1/0x2b0 [ 30.477905] mmap_region+0x1f9/0x2660 [ 30.478484] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.479100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.479948] ? __pfx_lock_acquire+0x10/0x10 [ 30.480574] ? __pfx_mmap_region+0x10/0x10 [ 30.481207] ? security_mmap_addr+0x7d/0xa0 [ 30.481829] ? get_unmapped_area+0x1f5/0x3f0 [ 30.482496] do_mmap+0x854/0xf00 [ 30.483013] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.483602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.484270] ksys_mmap_pgoff+0x3af/0x500 [ 30.484882] do_syscall_64+0x3f/0x90 [ 30.485450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.486216] RIP: 0033:0x7f2d01424d82 [ 30.486754] 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 [ 30.489248] RSP: 002b:00007ffc04b08b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.490339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d01424d82 [ 30.491336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d0085e000 [ 30.492343] RBP: 00007f2d0085e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.493338] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b51c637ec0 [ 30.494336] R13: 00007ffc04b08b20 R14: 00007ffc04b08b50 R15: 00007ffc04b08eb0 [ 30.495347] [ 30.495685] [ 30.495931] Allocated by task 213: [ 30.496434] kasan_save_stack+0x22/0x50 [ 30.497028] kasan_set_track+0x25/0x30 [ 30.497604] __kasan_slab_alloc+0x59/0x70 [ 30.498245] kmem_cache_alloc+0x16b/0x370 [ 30.498850] vm_area_dup+0x20/0x160 [ 30.499380] __split_vma+0x170/0x950 [ 30.499933] split_vma+0xc6/0x110 [ 30.500446] mprotect_fixup+0x8d2/0xb30 [ 30.501039] do_mprotect_pkey+0x87e/0xd40 [ 30.501652] __x64_sys_mprotect+0x78/0xc0 [ 30.502270] do_syscall_64+0x3f/0x90 [ 30.502821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503632] [ 30.503884] Freed by task 213: [ 30.504344] kasan_save_stack+0x22/0x50 [ 30.504931] kasan_set_track+0x25/0x30 [ 30.505518] kasan_save_free_info+0x2b/0x50 [ 30.506165] __kasan_slab_free+0x10a/0x190 [ 30.506791] kmem_cache_free+0x10d/0x4d0 [ 30.507390] rcu_core+0x8c8/0x2860 [ 30.507912] __do_softirq+0x1b7/0x7d4 [ 30.508473] [ 30.508721] Last potentially related work creation: [ 30.509411] kasan_save_stack+0x22/0x50 [ 30.510008] __kasan_record_aux_stack+0x8e/0xa0 [ 30.510687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.511435] remove_vma+0x139/0x170 [ 30.511962] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.512607] do_vmi_munmap+0x1f1/0x2b0 [ 30.513196] __vm_munmap+0x138/0x3a0 [ 30.513776] __x64_sys_munmap+0x59/0x80 [ 30.514379] do_syscall_64+0x3f/0x90 [ 30.514933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515685] [ 30.515939] The buggy address belongs to the object at ffff8880199021d0 [ 30.515939] which belongs to the cache vm_area_struct of size 168 [ 30.517655] The buggy address is located 88 bytes inside of [ 30.517655] freed 168-byte region [ffff8880199021d0, ffff888019902278) [ 30.519294] [ 30.519545] The buggy address belongs to the physical page: [ 30.520313] page:00000000fc8d7f15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19902 [ 30.521581] memcg:ffff888018d14d01 [ 30.522096] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.522844] page_type: 0xffffffff() [ 30.523370] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a2d40 dead00000000000a [ 30.524430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d14d01 [ 30.525481] page dumped because: kasan: bad access detected [ 30.526257] [ 30.526506] Memory state around the buggy address: [ 30.527179] ffff888019902100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.528174] ffff888019902180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.529169] >ffff888019902200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.530167] ^ [ 30.530814] ffff888019902280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.531804] ffff888019902300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.532801] ================================================================== [ 30.533934] Disabling lock debugging due to kernel taint [ 32.686424] BUG: Bad rss-counter state mm:0000000097a8ee9c type:MM_FILEPAGES val:33 [ 32.687607] BUG: Bad rss-counter state mm:0000000097a8ee9c type:MM_ANONPAGES val:22 [ 33.175506] BUG: Bad rss-counter state mm:00000000378f9e1a type:MM_FILEPAGES val:33 [ 33.176750] BUG: Bad rss-counter state mm:00000000378f9e1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7577' (ECDSA) to the list of known hosts. 2023/06/20 21:39:07 fuzzer started 2023/06/20 21:39:07 dialing manager at localhost:36067 2023/06/20 21:39:07 checking machine... 2023/06/20 21:39:07 checking revisions... [ 33.817614] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:39:07 testing simple program... [ 33.869426] cgroup: Unknown subsys name 'net' [ 33.905854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:39:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f64419b9ec0 CR3=0000000009a74000 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=fd38b30397b75ba59b4894ec5b82e7e7 XMM02=000000000011a538ec2efd57dc4c00df XMM03=0000000000121a480b1df2d9d7102ea0 XMM04=c65a126a03ed7c9f00000000000ae988 XMM05=19e9129bd510f23500000000001318d0 XMM06=f4560c24cbff30d10000000000130738 XMM07=e042d86d42eb936e0000000000121cc8 XMM08=0b1df2d9d7102ea0000000000011a598 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e97a570 RCX=00007fd16ce73000 RDX=1ffff11001d2f4af RSI=ffffffff81732e32 RDI=ffff88800e97a578 RBP=ffff888016ccfca8 RSP=ffff888016ccfaa0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888016ccfaf8 R13=ffff88800c51abc8 R14=0000000000000000 R15=00007fd16ce8f000 RIP=ffffffff81732e55 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 00007fd16cea3900 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=00007fd16ce82020 CR3=0000000019f18000 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=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