syzkaller login: [ 32.164467] BUG: Bad rss-counter state mm:0000000052320a31 type:MM_FILEPAGES val:33 [ 32.165584] BUG: Bad rss-counter state mm:0000000052320a31 type:MM_ANONPAGES val:22 [ 32.262244] ================================================================== [ 32.262943] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.263682] Read of size 8 at addr ffff88801a06d310 by task sshd/221 [ 32.264281] [ 32.264450] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.265114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.265969] Call Trace: [ 32.266214] [ 32.266439] dump_stack_lvl+0x91/0xf0 [ 32.266817] print_report+0xcc/0x620 [ 32.267211] ? __virt_addr_valid+0x102/0x340 [ 32.267633] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.268119] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.268498] kasan_report+0xbe/0xf0 [ 32.268761] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.269102] vma_interval_tree_remove+0xc75/0xec0 [ 32.269435] vma_prepare+0xc54/0x11a0 [ 32.269700] __split_vma+0x5af/0x950 [ 32.269958] ? __pfx___split_vma+0x10/0x10 [ 32.270247] ? find_held_lock+0x2c/0x110 [ 32.270533] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.270844] ? lock_is_held_type+0x9f/0x120 [ 32.271148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.271502] ? mtree_range_walk+0x632/0x900 [ 32.271824] ? mas_walk+0x5c7/0x7c0 [ 32.272101] do_vmi_munmap+0x1f1/0x2b0 [ 32.272389] mmap_region+0x1f9/0x2660 [ 32.272668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.272964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.273380] ? __pfx_lock_acquire+0x10/0x10 [ 32.273689] ? __pfx_mmap_region+0x10/0x10 [ 32.274010] ? security_mmap_addr+0x7d/0xa0 [ 32.274327] ? get_unmapped_area+0x1f5/0x3f0 [ 32.274636] do_mmap+0x854/0xf00 [ 32.274896] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.275203] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.275539] ksys_mmap_pgoff+0x3af/0x500 [ 32.275836] do_syscall_64+0x3f/0x90 [ 32.276117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.276511] RIP: 0033:0x7fc7413c2d82 [ 32.276786] 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 [ 32.278052] RSP: 002b:00007ffddb96d358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.278595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7413c2d82 [ 32.279111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7407fc000 [ 32.279614] RBP: 00007fc7407fc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.280118] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dcd2429980 [ 32.280618] R13: 00007ffddb96d370 R14: 00007ffddb96d3a0 R15: 00007ffddb96d700 [ 32.281137] [ 32.281305] [ 32.281428] Allocated by task 214: [ 32.281691] kasan_save_stack+0x22/0x50 [ 32.281992] kasan_set_track+0x25/0x30 [ 32.282285] __kasan_slab_alloc+0x59/0x70 [ 32.282602] kmem_cache_alloc+0x16b/0x370 [ 32.282910] vm_area_dup+0x20/0x160 [ 32.283186] __split_vma+0x170/0x950 [ 32.283455] split_vma+0xc6/0x110 [ 32.283711] mprotect_fixup+0x8d2/0xb30 [ 32.284019] do_mprotect_pkey+0x87e/0xd40 [ 32.284325] __x64_sys_mprotect+0x78/0xc0 [ 32.284633] do_syscall_64+0x3f/0x90 [ 32.284913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.285287] [ 32.285417] Freed by task 13: [ 32.285641] kasan_save_stack+0x22/0x50 [ 32.285937] kasan_set_track+0x25/0x30 [ 32.286233] kasan_save_free_info+0x2b/0x50 [ 32.286573] __kasan_slab_free+0x10a/0x190 [ 32.286912] kmem_cache_free+0x10d/0x4d0 [ 32.287223] rcu_core+0x8c8/0x2860 [ 32.287479] __do_softirq+0x1b7/0x7d4 [ 32.287757] [ 32.287885] Last potentially related work creation: [ 32.288241] kasan_save_stack+0x22/0x50 [ 32.288540] __kasan_record_aux_stack+0x8e/0xa0 [ 32.288882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.289269] remove_vma+0x139/0x170 [ 32.289546] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.289870] do_vmi_munmap+0x1f1/0x2b0 [ 32.290163] __vm_munmap+0x138/0x3a0 [ 32.290439] __x64_sys_munmap+0x59/0x80 [ 32.290733] do_syscall_64+0x3f/0x90 [ 32.291017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.291416] [ 32.291542] The buggy address belongs to the object at ffff88801a06d2b8 [ 32.291542] which belongs to the cache vm_area_struct of size 168 [ 32.292400] The buggy address is located 88 bytes inside of [ 32.292400] freed 168-byte region [ffff88801a06d2b8, ffff88801a06d360) [ 32.293221] [ 32.293344] The buggy address belongs to the physical page: [ 32.293738] page:0000000090f13f86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a06d [ 32.294374] memcg:ffff888019c7d801 [ 32.294630] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.295006] page_type: 0xffffffff() [ 32.295276] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.295814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c7d801 [ 32.296341] page dumped because: kasan: bad access detected [ 32.296737] [ 32.296859] Memory state around the buggy address: [ 32.297198] ffff88801a06d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.297701] ffff88801a06d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.298199] >ffff88801a06d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.298695] ^ [ 32.298965] ffff88801a06d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.299478] ffff88801a06d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.299977] ================================================================== [ 32.300608] Disabling lock debugging due to kernel taint [ 33.768692] BUG: Bad rss-counter state mm:00000000443e60b8 type:MM_FILEPAGES val:33 [ 33.769441] BUG: Bad rss-counter state mm:00000000443e60b8 type:MM_ANONPAGES val:22 [ 34.180277] BUG: Bad rss-counter state mm:000000000f8919c9 type:MM_FILEPAGES val:33 [ 34.181661] BUG: Bad rss-counter state mm:000000000f8919c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39964' (ECDSA) to the list of known hosts. 2023/06/19 12:49:49 fuzzer started 2023/06/19 12:49:49 dialing manager at localhost:44161 2023/06/19 12:49:49 checking machine... 2023/06/19 12:49:49 checking revisions... [ 34.832403] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:49:49 testing simple program... [ 34.884682] cgroup: Unknown subsys name 'net' [ 34.932241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:49:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f99d835f750 CR3=000000000f25e000 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=2039343a39343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a39343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff812e00e5 RDX=1ffff11003053043 RSI=0000000000000004 RDI=ffff888018298248 RBP=ffff888018298178 RSP=ffff88801c8ffa60 R8 =0000000000000001 R9 =ffffed100391ff3e R10=0000000000000003 R11=0000000000000001 R12=ffff888018298208 R13=ffffffff818cf549 R14=00000000ffffffff R15=0000000000000000 RIP=ffffffff818cf9f2 RFL=00000212 [----A--] 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 00007fb871db3900 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=00007fff8ba81000 CR3=000000000ea84000 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