syzkaller login: [ 31.151440] BUG: Bad rss-counter state mm:000000003e8175b2 type:MM_FILEPAGES val:33 [ 31.152646] BUG: Bad rss-counter state mm:000000003e8175b2 type:MM_ANONPAGES val:22 [ 31.294774] ================================================================== [ 31.295704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.296647] Read of size 8 at addr ffff88800e3afc20 by task sshd/220 [ 31.297439] [ 31.297661] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.298734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.299737] Call Trace: [ 31.300067] <TASK> [ 31.300357] dump_stack_lvl+0x91/0xf0 [ 31.300880] print_report+0xcc/0x620 [ 31.301371] ? __virt_addr_valid+0x102/0x340 [ 31.301944] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.302567] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303198] kasan_report+0xbe/0xf0 [ 31.303675] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.304300] vma_interval_tree_remove+0xc75/0xec0 [ 31.304913] vma_prepare+0xc54/0x11a0 [ 31.305398] __split_vma+0x5af/0x950 [ 31.305885] ? __pfx___split_vma+0x10/0x10 [ 31.306421] ? find_held_lock+0x2c/0x110 [ 31.306942] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.307518] ? lock_is_held_type+0x9f/0x120 [ 31.308064] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.308679] ? mtree_range_walk+0x632/0x900 [ 31.309235] ? mas_walk+0x5c7/0x7c0 [ 31.309732] do_vmi_munmap+0x1f1/0x2b0 [ 31.310231] mmap_region+0x1f9/0x2660 [ 31.310714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.311231] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.311951] ? __pfx_lock_acquire+0x10/0x10 [ 31.312485] ? __pfx_mmap_region+0x10/0x10 [ 31.313023] ? security_mmap_addr+0x7d/0xa0 [ 31.313566] ? get_unmapped_area+0x1f5/0x3f0 [ 31.314118] do_mmap+0x854/0xf00 [ 31.314558] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.315051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.315612] ksys_mmap_pgoff+0x3af/0x500 [ 31.316117] do_syscall_64+0x3f/0x90 [ 31.316601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317242] RIP: 0033:0x7fb2f9819d82 [ 31.317719] 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 [ 31.319856] RSP: 002b:00007ffd212efe18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.320754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2f9819d82 [ 31.321606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2f8c53000 [ 31.322456] RBP: 00007fb2f8c53000 R08: 0000000000000009 R09: 0000000000001000 [ 31.323299] R10: 0000000000000812 R11: 0000000000000206 R12: 000056172cfa6ec0 [ 31.324145] R13: 00007ffd212efe30 R14: 00007ffd212efe60 R15: 00007ffd212f01c0 [ 31.324997] </TASK> [ 31.325290] [ 31.325516] Allocated by task 213: [ 31.325949] kasan_save_stack+0x22/0x50 [ 31.326457] kasan_set_track+0x25/0x30 [ 31.326948] __kasan_slab_alloc+0x59/0x70 [ 31.327472] kmem_cache_alloc+0x16b/0x370 [ 31.327986] vm_area_dup+0x20/0x160 [ 31.328440] __split_vma+0x170/0x950 [ 31.328904] split_vma+0xc6/0x110 [ 31.329346] mprotect_fixup+0x8d2/0xb30 [ 31.329864] do_mprotect_pkey+0x87e/0xd40 [ 31.330391] __x64_sys_mprotect+0x78/0xc0 [ 31.330919] do_syscall_64+0x3f/0x90 [ 31.331404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332048] [ 31.332265] Freed by task 213: [ 31.332657] kasan_save_stack+0x22/0x50 [ 31.333162] kasan_set_track+0x25/0x30 [ 31.333670] kasan_save_free_info+0x2b/0x50 [ 31.334200] __kasan_slab_free+0x10a/0x190 [ 31.334730] kmem_cache_free+0x10d/0x4d0 [ 31.335236] rcu_core+0x8c8/0x2860 [ 31.335686] __do_softirq+0x1b7/0x7d4 [ 31.336162] [ 31.336375] Last potentially related work creation: [ 31.336964] kasan_save_stack+0x22/0x50 [ 31.337481] __kasan_record_aux_stack+0x8e/0xa0 [ 31.338066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.338722] remove_vma+0x139/0x170 [ 31.339178] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.339815] do_vmi_munmap+0x1f1/0x2b0 [ 31.340306] __vm_munmap+0x138/0x3a0 [ 31.340768] __x64_sys_munmap+0x59/0x80 [ 31.341275] do_syscall_64+0x3f/0x90 [ 31.341763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342409] [ 31.342627] Second to last potentially related work creation: [ 31.343305] kasan_save_stack+0x22/0x50 [ 31.343803] __kasan_record_aux_stack+0x8e/0xa0 [ 31.344374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.345013] remove_vma+0x139/0x170 [ 31.345479] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.346039] do_vmi_munmap+0x1f1/0x2b0 [ 31.346532] mmap_region+0x1f9/0x2660 [ 31.347008] do_mmap+0x854/0xf00 [ 31.347447] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.347945] ksys_mmap_pgoff+0x3af/0x500 [ 31.348452] do_syscall_64+0x3f/0x90 [ 31.348927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.349590] [ 31.349809] The buggy address belongs to the object at ffff88800e3afbc8 [ 31.349809] which belongs to the cache vm_area_struct of size 168 [ 31.351266] The buggy address is located 88 bytes inside of [ 31.351266] freed 168-byte region [ffff88800e3afbc8, ffff88800e3afc70) [ 31.352663] [ 31.352882] The buggy address belongs to the physical page: [ 31.353551] page:00000000af4b2335 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3af [ 31.354627] memcg:ffff888008c77d01 [ 31.355055] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.355757] page_type: 0xffffffff() [ 31.356208] raw: 0100000000000200 ffff8880087a0c80 ffffea0000371780 dead000000000007 [ 31.357124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008c77d01 [ 31.358053] page dumped because: kasan: bad access detected [ 31.358714] [ 31.358932] Memory state around the buggy address: [ 31.359506] ffff88800e3afb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.360361] ffff88800e3afb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.361216] >ffff88800e3afc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.362082] ^ [ 31.362610] ffff88800e3afc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.363465] ffff88800e3afd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.364315] ================================================================== [ 31.365235] Disabling lock debugging due to kernel taint [ 33.211347] BUG: Bad rss-counter state mm:000000005164bd89 type:MM_FILEPAGES val:33 [ 33.212573] BUG: Bad rss-counter state mm:000000005164bd89 type:MM_ANONPAGES val:22 [ 33.781894] BUG: Bad rss-counter state mm:00000000910e87d5 type:MM_FILEPAGES val:33 [ 33.783106] BUG: Bad rss-counter state mm:00000000910e87d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37150' (ECDSA) to the list of known hosts. 2023/06/21 04:17:33 fuzzer started 2023/06/21 04:17:33 dialing manager at localhost:36067 2023/06/21 04:17:33 checking machine... 2023/06/21 04:17:33 checking revisions... [ 34.451517] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:17:34 testing simple program... [ 34.492182] cgroup: Unknown subsys name 'net' [ 34.548368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:17:33 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=00007fffb778f988 CR3=000000000daf2000 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=2033333a37313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=ffffffff8180c6a2 RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff860d825a R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff8113071f RFL=00000282 [--S----] 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 00007fc6c7dc2900 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=00007ffc138c4000 CR3=000000001a398000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000