syzkaller login: [ 31.024047] BUG: Bad rss-counter state mm:00000000055d88bd type:MM_FILEPAGES val:33 [ 31.025676] BUG: Bad rss-counter state mm:00000000055d88bd type:MM_ANONPAGES val:22 [ 31.187677] ================================================================== [ 31.188769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.189869] Read of size 8 at addr ffff888019e38058 by task sshd/220 [ 31.190923] [ 31.191186] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.192217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.193378] Call Trace: [ 31.193760] [ 31.194091] dump_stack_lvl+0x91/0xf0 [ 31.194669] print_report+0xcc/0x620 [ 31.195239] ? __virt_addr_valid+0x102/0x340 [ 31.195882] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196578] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197227] kasan_report+0xbe/0xf0 [ 31.197719] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198357] vma_interval_tree_remove+0xc75/0xec0 [ 31.198971] vma_prepare+0xc54/0x11a0 [ 31.199467] __split_vma+0x5af/0x950 [ 31.199971] ? __pfx___split_vma+0x10/0x10 [ 31.200531] ? find_held_lock+0x2c/0x110 [ 31.201064] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.201644] ? lock_is_held_type+0x9f/0x120 [ 31.202207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.202834] ? mtree_range_walk+0x632/0x900 [ 31.203414] ? mas_walk+0x5c7/0x7c0 [ 31.203900] do_vmi_munmap+0x1f1/0x2b0 [ 31.204416] mmap_region+0x1f9/0x2660 [ 31.204907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.205442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.206193] ? __pfx_lock_acquire+0x10/0x10 [ 31.206740] ? __pfx_mmap_region+0x10/0x10 [ 31.207289] ? security_mmap_addr+0x7d/0xa0 [ 31.207841] ? get_unmapped_area+0x1f5/0x3f0 [ 31.208430] do_mmap+0x854/0xf00 [ 31.208878] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.209415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.210007] ksys_mmap_pgoff+0x3af/0x500 [ 31.210530] do_syscall_64+0x3f/0x90 [ 31.211027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211704] RIP: 0033:0x7f1aaffdfd82 [ 31.212190] 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 [ 31.214430] RSP: 002b:00007ffda0626608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.215384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1aaffdfd82 [ 31.216286] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1aaf419000 [ 31.217171] RBP: 00007f1aaf419000 R08: 0000000000000009 R09: 0000000000001000 [ 31.218067] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7ebb58f60 [ 31.218950] R13: 00007ffda0626620 R14: 00007ffda0626650 R15: 00007ffda06269b0 [ 31.219844] [ 31.220149] [ 31.220374] Allocated by task 213: [ 31.220816] kasan_save_stack+0x22/0x50 [ 31.221340] kasan_set_track+0x25/0x30 [ 31.221849] __kasan_slab_alloc+0x59/0x70 [ 31.222392] kmem_cache_alloc+0x16b/0x370 [ 31.222927] vm_area_dup+0x20/0x160 [ 31.223404] __split_vma+0x170/0x950 [ 31.223893] split_vma+0xc6/0x110 [ 31.224362] mprotect_fixup+0x8d2/0xb30 [ 31.224878] do_mprotect_pkey+0x87e/0xd40 [ 31.225429] __x64_sys_mprotect+0x78/0xc0 [ 31.225966] do_syscall_64+0x3f/0x90 [ 31.226455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227131] [ 31.227349] Freed by task 213: [ 31.227753] kasan_save_stack+0x22/0x50 [ 31.228292] kasan_set_track+0x25/0x30 [ 31.228811] kasan_save_free_info+0x2b/0x50 [ 31.229364] __kasan_slab_free+0x10a/0x190 [ 31.229912] kmem_cache_free+0x10d/0x4d0 [ 31.230435] rcu_core+0x8c8/0x2860 [ 31.230901] __do_softirq+0x1b7/0x7d4 [ 31.231450] [ 31.231673] Last potentially related work creation: [ 31.232287] kasan_save_stack+0x22/0x50 [ 31.232812] __kasan_record_aux_stack+0x8e/0xa0 [ 31.233403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.234059] remove_vma+0x139/0x170 [ 31.234523] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.235097] do_vmi_munmap+0x1f1/0x2b0 [ 31.235603] __vm_munmap+0x138/0x3a0 [ 31.236104] __x64_sys_munmap+0x59/0x80 [ 31.236606] do_syscall_64+0x3f/0x90 [ 31.237097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237761] [ 31.237983] Second to last potentially related work creation: [ 31.238678] kasan_save_stack+0x22/0x50 [ 31.239194] __kasan_record_aux_stack+0x8e/0xa0 [ 31.239784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.240456] remove_vma+0x139/0x170 [ 31.240930] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.241510] do_vmi_munmap+0x1f1/0x2b0 [ 31.242015] mmap_region+0x1f9/0x2660 [ 31.242513] do_mmap+0x854/0xf00 [ 31.242955] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.243457] ksys_mmap_pgoff+0x3af/0x500 [ 31.243987] do_syscall_64+0x3f/0x90 [ 31.244486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245150] [ 31.245370] The buggy address belongs to the object at ffff888019e38000 [ 31.245370] which belongs to the cache vm_area_struct of size 168 [ 31.246898] The buggy address is located 88 bytes inside of [ 31.246898] freed 168-byte region [ffff888019e38000, ffff888019e380a8) [ 31.248352] [ 31.248571] The buggy address belongs to the physical page: [ 31.249259] page:0000000094cc163b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e38 [ 31.250389] memcg:ffff88800e28c801 [ 31.250829] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.251496] page_type: 0xffffffff() [ 31.251973] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b4280 dead000000000008 [ 31.252922] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e28c801 [ 31.253865] page dumped because: kasan: bad access detected [ 31.254545] [ 31.254765] Memory state around the buggy address: [ 31.255367] ffff888019e37f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.256258] ffff888019e37f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.257143] >ffff888019e38000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.258024] ^ [ 31.258773] ffff888019e38080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.259653] ffff888019e38100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.260540] ================================================================== [ 31.261491] Disabling lock debugging due to kernel taint [ 33.956029] BUG: Bad rss-counter state mm:00000000b2402cbe type:MM_FILEPAGES val:33 [ 33.957120] BUG: Bad rss-counter state mm:00000000b2402cbe type:MM_ANONPAGES val:22 [ 34.469032] BUG: Bad rss-counter state mm:000000004873d13c type:MM_FILEPAGES val:33 [ 34.470682] BUG: Bad rss-counter state mm:000000004873d13c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33801' (ECDSA) to the list of known hosts. 2023/06/20 21:03:37 fuzzer started 2023/06/20 21:03:37 dialing manager at localhost:36067 2023/06/20 21:03:37 checking machine... 2023/06/20 21:03:37 checking revisions... [ 35.204136] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:03:37 testing simple program... [ 35.248649] cgroup: Unknown subsys name 'net' [ 35.316234] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:03:37 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=0000000000000001 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=00007fff3713d528 CR3=0000000005482000 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=00007f4c8a00f510000055648e3e5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019d03680 RSI=ffffffff8185a0d2 RDI=ffff8880159ec400 RBP=ffff8880159ec400 RSP=ffff88801671fda0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000008 R13=ffff8880159ec400 R14=ffff88800cce6c80 R15=dffffc0000000000 RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 00007f05a2835900 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=00007fff73a9f000 CR3=0000000015854000 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