syzkaller login: [ 30.140016] BUG: Bad rss-counter state mm:000000000e97af46 type:MM_FILEPAGES val:33 [ 30.141028] BUG: Bad rss-counter state mm:000000000e97af46 type:MM_ANONPAGES val:22 [ 30.301728] ================================================================== [ 30.302646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.303595] Read of size 8 at addr ffff888016abd4e0 by task sshd/220 [ 30.304364] [ 30.304667] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.305548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.306566] Call Trace: [ 30.306905] [ 30.307192] dump_stack_lvl+0x91/0xf0 [ 30.307686] print_report+0xcc/0x620 [ 30.308172] ? __virt_addr_valid+0x102/0x340 [ 30.308732] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.309357] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.309985] kasan_report+0xbe/0xf0 [ 30.310482] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.311148] vma_interval_tree_remove+0xc75/0xec0 [ 30.311753] vma_prepare+0xc54/0x11a0 [ 30.312231] __split_vma+0x5af/0x950 [ 30.312707] ? __pfx___split_vma+0x10/0x10 [ 30.313234] ? find_held_lock+0x2c/0x110 [ 30.313756] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.314327] ? lock_is_held_type+0x9f/0x120 [ 30.314884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.315492] ? mtree_range_walk+0x632/0x900 [ 30.316048] ? mas_walk+0x5c7/0x7c0 [ 30.316530] do_vmi_munmap+0x1f1/0x2b0 [ 30.317026] mmap_region+0x1f9/0x2660 [ 30.317509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.318024] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.318750] ? __pfx_lock_acquire+0x10/0x10 [ 30.319283] ? __pfx_mmap_region+0x10/0x10 [ 30.319814] ? security_mmap_addr+0x7d/0xa0 [ 30.320347] ? get_unmapped_area+0x1f5/0x3f0 [ 30.320900] do_mmap+0x854/0xf00 [ 30.321339] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.321842] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.322408] ksys_mmap_pgoff+0x3af/0x500 [ 30.322931] do_syscall_64+0x3f/0x90 [ 30.323417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.324070] RIP: 0033:0x7f12172cfd82 [ 30.324527] 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 [ 30.326652] RSP: 002b:00007fffe0081168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.327570] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12172cfd82 [ 30.328423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1216709000 [ 30.329268] RBP: 00007f1216709000 R08: 0000000000000009 R09: 0000000000001000 [ 30.330117] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae8fe00ec0 [ 30.330984] R13: 00007fffe0081180 R14: 00007fffe00811b0 R15: 00007fffe0081510 [ 30.331850] [ 30.332143] [ 30.332367] Allocated by task 213: [ 30.332791] kasan_save_stack+0x22/0x50 [ 30.333310] kasan_set_track+0x25/0x30 [ 30.333805] __kasan_slab_alloc+0x59/0x70 [ 30.334339] kmem_cache_alloc+0x16b/0x370 [ 30.334865] vm_area_dup+0x20/0x160 [ 30.335319] __split_vma+0x170/0x950 [ 30.335789] split_vma+0xc6/0x110 [ 30.336226] mprotect_fixup+0x8d2/0xb30 [ 30.336735] do_mprotect_pkey+0x87e/0xd40 [ 30.337262] __x64_sys_mprotect+0x78/0xc0 [ 30.337785] do_syscall_64+0x3f/0x90 [ 30.338259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.338920] [ 30.339145] Freed by task 213: [ 30.339535] kasan_save_stack+0x22/0x50 [ 30.340042] kasan_set_track+0x25/0x30 [ 30.340542] kasan_save_free_info+0x2b/0x50 [ 30.341072] __kasan_slab_free+0x10a/0x190 [ 30.341602] kmem_cache_free+0x10d/0x4d0 [ 30.342116] rcu_core+0x8c8/0x2860 [ 30.342559] __do_softirq+0x1b7/0x7d4 [ 30.343051] [ 30.343275] Last potentially related work creation: [ 30.343861] kasan_save_stack+0x22/0x50 [ 30.344366] __kasan_record_aux_stack+0x8e/0xa0 [ 30.344936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.345580] remove_vma+0x139/0x170 [ 30.346030] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.346587] do_vmi_munmap+0x1f1/0x2b0 [ 30.347085] __vm_munmap+0x138/0x3a0 [ 30.347566] __x64_sys_munmap+0x59/0x80 [ 30.348060] do_syscall_64+0x3f/0x90 [ 30.348537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.349183] [ 30.349401] The buggy address belongs to the object at ffff888016abd488 [ 30.349401] which belongs to the cache vm_area_struct of size 168 [ 30.350888] The buggy address is located 88 bytes inside of [ 30.350888] freed 168-byte region [ffff888016abd488, ffff888016abd530) [ 30.352298] [ 30.352515] The buggy address belongs to the physical page: [ 30.353169] page:000000006b755507 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16abd [ 30.354270] memcg:ffff88800eaa9f01 [ 30.354719] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.355369] page_type: 0xffffffff() [ 30.355819] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.356754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaa9f01 [ 30.357655] page dumped because: kasan: bad access detected [ 30.358312] [ 30.358535] Memory state around the buggy address: [ 30.359126] ffff888016abd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.359987] ffff888016abd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.360845] >ffff888016abd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.361701] ^ [ 30.362463] ffff888016abd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.363331] ffff888016abd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.364184] ================================================================== [ 30.365154] Disabling lock debugging due to kernel taint [ 32.338070] BUG: Bad rss-counter state mm:00000000718ab257 type:MM_FILEPAGES val:33 [ 32.339310] BUG: Bad rss-counter state mm:00000000718ab257 type:MM_ANONPAGES val:22 [ 32.714391] BUG: Bad rss-counter state mm:0000000021b526a4 type:MM_FILEPAGES val:33 [ 32.715487] BUG: Bad rss-counter state mm:0000000021b526a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60565' (ECDSA) to the list of known hosts. 2023/06/21 00:40:48 fuzzer started 2023/06/21 00:40:48 dialing manager at localhost:36067 2023/06/21 00:40:48 checking machine... 2023/06/21 00:40:48 checking revisions... [ 33.443069] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:40:48 testing simple program... [ 33.481981] cgroup: Unknown subsys name 'net' [ 33.522316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:40:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002de8b2a RSI=ffffffff84d37e60 RDI=ffff888016f45951 RBP=ffff888016f45930 RSP=ffff8880165ffce0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff87f970f0 R13=0000000000000000 R14=ffffffff87b6a200 R15=0000000000000000 RIP=ffffffff812db442 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 00007f3d2e36a900 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=00007f3d2e91f650 CR3=000000000f5c0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fff990de458 CR3=000000000ee76000 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=2038343a30343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000