syzkaller login: [ 33.310650] BUG: Bad rss-counter state mm:000000003d1a9e7f type:MM_FILEPAGES val:33 [ 33.311850] BUG: Bad rss-counter state mm:000000003d1a9e7f type:MM_ANONPAGES val:22 [ 33.473211] ================================================================== [ 33.474179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.475154] Read of size 8 at addr ffff88801b806058 by task sshd/221 [ 33.476143] [ 33.476370] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.477253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.478265] Call Trace: [ 33.478604] [ 33.478900] dump_stack_lvl+0x91/0xf0 [ 33.479409] print_report+0xcc/0x620 [ 33.479903] ? __virt_addr_valid+0x102/0x340 [ 33.480471] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.481093] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.481722] kasan_report+0xbe/0xf0 [ 33.482215] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.482846] vma_interval_tree_remove+0xc75/0xec0 [ 33.483456] vma_prepare+0xc54/0x11a0 [ 33.483956] __split_vma+0x5af/0x950 [ 33.484442] ? __pfx___split_vma+0x10/0x10 [ 33.484976] ? find_held_lock+0x2c/0x110 [ 33.485502] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.486070] ? lock_is_held_type+0x9f/0x120 [ 33.486621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.487256] ? mtree_range_walk+0x632/0x900 [ 33.487820] ? mas_walk+0x5c7/0x7c0 [ 33.488301] do_vmi_munmap+0x1f1/0x2b0 [ 33.488796] mmap_region+0x1f9/0x2660 [ 33.489291] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.489807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.490516] ? __pfx_lock_acquire+0x10/0x10 [ 33.491071] ? __pfx_mmap_region+0x10/0x10 [ 33.491611] ? security_mmap_addr+0x7d/0xa0 [ 33.492140] ? get_unmapped_area+0x1f5/0x3f0 [ 33.492700] do_mmap+0x854/0xf00 [ 33.493146] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.493638] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.494208] ksys_mmap_pgoff+0x3af/0x500 [ 33.494727] do_syscall_64+0x3f/0x90 [ 33.495231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.495889] RIP: 0033:0x7fc9aa499d82 [ 33.496354] 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 [ 33.498539] RSP: 002b:00007ffc5eb33a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.499480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9aa499d82 [ 33.500354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9a98d3000 [ 33.501259] RBP: 00007fc9a98d3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.502146] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1446d9f70 [ 33.503036] R13: 00007ffc5eb33a20 R14: 00007ffc5eb33a50 R15: 00007ffc5eb33db0 [ 33.503917] [ 33.504209] [ 33.504431] Allocated by task 214: [ 33.504863] kasan_save_stack+0x22/0x50 [ 33.505376] kasan_set_track+0x25/0x30 [ 33.505874] __kasan_slab_alloc+0x59/0x70 [ 33.506407] kmem_cache_alloc+0x16b/0x370 [ 33.506951] vm_area_dup+0x20/0x160 [ 33.507418] __split_vma+0x170/0x950 [ 33.507886] split_vma+0xc6/0x110 [ 33.508331] mprotect_fixup+0x8d2/0xb30 [ 33.508840] do_mprotect_pkey+0x87e/0xd40 [ 33.509372] __x64_sys_mprotect+0x78/0xc0 [ 33.509903] do_syscall_64+0x3f/0x90 [ 33.510386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.511038] [ 33.511255] Freed by task 214: [ 33.511655] kasan_save_stack+0x22/0x50 [ 33.512169] kasan_set_track+0x25/0x30 [ 33.512665] kasan_save_free_info+0x2b/0x50 [ 33.513216] __kasan_slab_free+0x10a/0x190 [ 33.513759] kmem_cache_free+0x10d/0x4d0 [ 33.514280] rcu_core+0x8c8/0x2860 [ 33.514737] __do_softirq+0x1b7/0x7d4 [ 33.515226] [ 33.515447] Last potentially related work creation: [ 33.516043] kasan_save_stack+0x22/0x50 [ 33.516560] __kasan_record_aux_stack+0x8e/0xa0 [ 33.517218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.517883] remove_vma+0x139/0x170 [ 33.518343] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.518926] do_vmi_munmap+0x1f1/0x2b0 [ 33.519423] __vm_munmap+0x138/0x3a0 [ 33.519901] __x64_sys_munmap+0x59/0x80 [ 33.520409] do_syscall_64+0x3f/0x90 [ 33.520899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.521548] [ 33.521763] The buggy address belongs to the object at ffff88801b806000 [ 33.521763] which belongs to the cache vm_area_struct of size 168 [ 33.523260] The buggy address is located 88 bytes inside of [ 33.523260] freed 168-byte region [ffff88801b806000, ffff88801b8060a8) [ 33.524682] [ 33.524900] The buggy address belongs to the physical page: [ 33.525570] page:00000000d6c093c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b806 [ 33.526669] memcg:ffff88800da0b301 [ 33.527146] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.527798] page_type: 0xffffffff() [ 33.528260] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.529197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da0b301 [ 33.530112] page dumped because: kasan: bad access detected [ 33.530784] [ 33.531013] Memory state around the buggy address: [ 33.531605] ffff88801b805f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.532474] ffff88801b805f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.533341] >ffff88801b806000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.534201] ^ [ 33.534947] ffff88801b806080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.535815] ffff88801b806100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.536686] ================================================================== [ 33.537705] Disabling lock debugging due to kernel taint [ 35.196436] BUG: Bad rss-counter state mm:00000000bf7e602f type:MM_FILEPAGES val:33 [ 35.197694] BUG: Bad rss-counter state mm:00000000bf7e602f type:MM_ANONPAGES val:22 [ 35.717483] BUG: Bad rss-counter state mm:00000000cf0b3eef type:MM_FILEPAGES val:33 [ 35.718793] BUG: Bad rss-counter state mm:00000000cf0b3eef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50545' (ECDSA) to the list of known hosts. 2023/06/19 11:05:32 fuzzer started 2023/06/19 11:05:32 dialing manager at localhost:44161 2023/06/19 11:05:32 checking machine... 2023/06/19 11:05:32 checking revisions... [ 36.368514] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:05:33 testing simple program... [ 36.417755] cgroup: Unknown subsys name 'net' [ 36.454862] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:30 Registers: info registers vcpu 0 RAX=1ffffffff0c2ac47 RBX=0000000000000001 RCX=ffffffff86156234 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86156238 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000025fbc R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880165b7a08 R15=ffff88806ce09a98 RIP=ffffffff81131118 RFL=00000216 [----AP-] 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 00007f658a6c2700 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=00007fe0480320b0 CR3=0000000008da2000 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=2032333a35303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a35303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c94813 RBX=ffff88800e4a4068 RCX=1ffff11002d30414 RDX=dffffc0000000000 RSI=ffff8880196e9000 RDI=ffff88800e4a4098 RBP=ffff888016982070 RSP=ffff8880166174b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880196e8000 R13=0000000000000000 R14=ffff88800d0f5898 R15=ffff88800d0f5850 RIP=ffffffff818474fe 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 00007fe047a7a900 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=00007fe048031618 CR3=000000001c9c6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000