syzkaller login: [ 31.058745] BUG: Bad rss-counter state mm:00000000509a3fff type:MM_FILEPAGES val:33 [ 31.060186] BUG: Bad rss-counter state mm:00000000509a3fff type:MM_ANONPAGES val:22 [ 31.227600] ================================================================== [ 31.228537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.229484] Read of size 8 at addr ffff88800e1f3310 by task sshd/220 [ 31.230297] [ 31.230515] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.231502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.232515] Call Trace: [ 31.232848] [ 31.233157] dump_stack_lvl+0x91/0xf0 [ 31.233677] print_report+0xcc/0x620 [ 31.234190] ? __virt_addr_valid+0x102/0x340 [ 31.234763] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235447] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236089] kasan_report+0xbe/0xf0 [ 31.236569] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237214] vma_interval_tree_remove+0xc75/0xec0 [ 31.237829] vma_prepare+0xc54/0x11a0 [ 31.238326] __split_vma+0x5af/0x950 [ 31.238823] ? __pfx___split_vma+0x10/0x10 [ 31.239359] ? find_held_lock+0x2c/0x110 [ 31.239902] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.240470] ? lock_is_held_type+0x9f/0x120 [ 31.241043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.241680] ? mtree_range_walk+0x632/0x900 [ 31.242258] ? mas_walk+0x5c7/0x7c0 [ 31.242769] do_vmi_munmap+0x1f1/0x2b0 [ 31.243261] mmap_region+0x1f9/0x2660 [ 31.243756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.244262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.244986] ? __pfx_lock_acquire+0x10/0x10 [ 31.245518] ? __pfx_mmap_region+0x10/0x10 [ 31.246068] ? security_mmap_addr+0x7d/0xa0 [ 31.246596] ? get_unmapped_area+0x1f5/0x3f0 [ 31.247149] do_mmap+0x854/0xf00 [ 31.247585] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.248090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.248646] ksys_mmap_pgoff+0x3af/0x500 [ 31.249155] do_syscall_64+0x3f/0x90 [ 31.249635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250305] RIP: 0033:0x7f2c19050d82 [ 31.250763] 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 [ 31.252897] RSP: 002b:00007fff8fd68cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.253806] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c19050d82 [ 31.254679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c1848a000 [ 31.255526] RBP: 00007f2c1848a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.256372] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579b466fec0 [ 31.257199] R13: 00007fff8fd68cd0 R14: 00007fff8fd68d00 R15: 00007fff8fd69060 [ 31.258070] [ 31.258358] [ 31.258574] Allocated by task 213: [ 31.258996] kasan_save_stack+0x22/0x50 [ 31.259493] kasan_set_track+0x25/0x30 [ 31.259986] __kasan_slab_alloc+0x59/0x70 [ 31.260505] kmem_cache_alloc+0x16b/0x370 [ 31.261018] vm_area_dup+0x20/0x160 [ 31.261468] __split_vma+0x170/0x950 [ 31.261944] split_vma+0xc6/0x110 [ 31.262390] mprotect_fixup+0x8d2/0xb30 [ 31.262894] do_mprotect_pkey+0x87e/0xd40 [ 31.263425] __x64_sys_mprotect+0x78/0xc0 [ 31.263940] do_syscall_64+0x3f/0x90 [ 31.264423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265053] [ 31.265269] Freed by task 203: [ 31.265657] kasan_save_stack+0x22/0x50 [ 31.266174] kasan_set_track+0x25/0x30 [ 31.266664] kasan_save_free_info+0x2b/0x50 [ 31.267194] __kasan_slab_free+0x10a/0x190 [ 31.267729] kmem_cache_free+0x10d/0x4d0 [ 31.268242] rcu_core+0x8c8/0x2860 [ 31.268686] __do_softirq+0x1b7/0x7d4 [ 31.269168] [ 31.269386] Last potentially related work creation: [ 31.269983] kasan_save_stack+0x22/0x50 [ 31.270483] __kasan_record_aux_stack+0x8e/0xa0 [ 31.271056] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.271705] remove_vma+0x139/0x170 [ 31.272149] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.272705] do_vmi_munmap+0x1f1/0x2b0 [ 31.273181] __vm_munmap+0x138/0x3a0 [ 31.273644] __x64_sys_munmap+0x59/0x80 [ 31.274142] do_syscall_64+0x3f/0x90 [ 31.274621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275257] [ 31.275475] Second to last potentially related work creation: [ 31.276146] kasan_save_stack+0x22/0x50 [ 31.276651] __kasan_record_aux_stack+0x8e/0xa0 [ 31.277221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.277862] remove_vma+0x139/0x170 [ 31.278320] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.278887] do_vmi_munmap+0x1f1/0x2b0 [ 31.279380] mmap_region+0x1f9/0x2660 [ 31.279857] do_mmap+0x854/0xf00 [ 31.280285] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.280777] ksys_mmap_pgoff+0x3af/0x500 [ 31.281281] do_syscall_64+0x3f/0x90 [ 31.281756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282425] [ 31.282645] The buggy address belongs to the object at ffff88800e1f32b8 [ 31.282645] which belongs to the cache vm_area_struct of size 168 [ 31.284089] The buggy address is located 88 bytes inside of [ 31.284089] freed 168-byte region [ffff88800e1f32b8, ffff88800e1f3360) [ 31.285480] [ 31.285697] The buggy address belongs to the physical page: [ 31.286355] page:00000000374d2551 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f3 [ 31.287439] memcg:ffff88800eedf701 [ 31.287866] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.288562] page_type: 0xffffffff() [ 31.289012] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.289969] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eedf701 [ 31.290865] page dumped because: kasan: bad access detected [ 31.291535] [ 31.291747] Memory state around the buggy address: [ 31.292313] ffff88800e1f3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.293158] ffff88800e1f3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.294015] >ffff88800e1f3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.294854] ^ [ 31.295312] ffff88800e1f3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.296168] ffff88800e1f3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.297010] ================================================================== [ 31.298135] Disabling lock debugging due to kernel taint [ 32.994245] BUG: Bad rss-counter state mm:0000000071918e7e type:MM_FILEPAGES val:33 [ 32.994795] BUG: Bad rss-counter state mm:0000000071918e7e type:MM_ANONPAGES val:22 [ 33.430990] BUG: Bad rss-counter state mm:000000007d1998ad type:MM_FILEPAGES val:33 [ 33.432094] BUG: Bad rss-counter state mm:000000007d1998ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32654' (ECDSA) to the list of known hosts. 2023/06/21 07:23:24 fuzzer started 2023/06/21 07:23:25 dialing manager at localhost:36067 2023/06/21 07:23:25 checking machine... 2023/06/21 07:23:25 checking revisions... [ 34.161091] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:23:25 testing simple program... [ 34.213925] cgroup: Unknown subsys name 'net' [ 34.260402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:23:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff8880175477a0 RSP=ffff888017547688 R8 =0000000000000000 R9 =ffff888017547788 R10=0000000000038001 R11=0000000000006097 R12=ffff8880175477a8 R13=ffff888017547790 R14=ffff888017547789 R15=ffff888017547748 RIP=ffffffff8113077a 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 00007fa857ccd900 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=00007ffe85432000 CR3=0000000019f8a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fd642fd6b60 CR3=000000000c5ee000 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=6bf94478f4c42f98e242f339a0142b15 XMM02=2c67c8bc2e329bc3000000000011a9c0 XMM03=fb795ef6d65770560000000000122230 XMM04=5420f3989006480000000000000ae988 XMM05=e4cb8bb95a7664b60000000000133348 XMM06=87ff14953b6aea5e00000000001321b0 XMM07=e042d86d42eb936e00000000001224b0 XMM08=3201a9418972bae0000000000011aa20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000