syzkaller login: [ 56.294661] BUG: Bad rss-counter state mm:0000000088f9306e type:MM_FILEPAGES val:33 [ 56.295660] BUG: Bad rss-counter state mm:0000000088f9306e type:MM_ANONPAGES val:22 [ 56.462552] ================================================================== [ 56.463463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.464400] Read of size 8 at addr ffff888016cc8df0 by task sshd/220 [ 56.465172] [ 56.465391] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.466394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.467378] Call Trace: [ 56.467707] [ 56.468013] dump_stack_lvl+0x91/0xf0 [ 56.468511] print_report+0xcc/0x620 [ 56.469022] ? __virt_addr_valid+0x102/0x340 [ 56.469584] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.470198] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.470832] kasan_report+0xbe/0xf0 [ 56.471310] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.471948] vma_interval_tree_remove+0xc75/0xec0 [ 56.472586] vma_prepare+0xc54/0x11a0 [ 56.473089] __split_vma+0x5af/0x950 [ 56.473579] ? __pfx___split_vma+0x10/0x10 [ 56.474129] ? find_held_lock+0x2c/0x110 [ 56.474665] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.475244] ? lock_is_held_type+0x9f/0x120 [ 56.475805] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.476441] ? mtree_range_walk+0x632/0x900 [ 56.477024] ? mas_walk+0x5c7/0x7c0 [ 56.477521] do_vmi_munmap+0x1f1/0x2b0 [ 56.478032] mmap_region+0x1f9/0x2660 [ 56.478530] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.479057] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.479802] ? __pfx_lock_acquire+0x10/0x10 [ 56.480351] ? __pfx_mmap_region+0x10/0x10 [ 56.480919] ? security_mmap_addr+0x7d/0xa0 [ 56.481471] ? get_unmapped_area+0x1f5/0x3f0 [ 56.482041] do_mmap+0x854/0xf00 [ 56.482496] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.483006] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.483590] ksys_mmap_pgoff+0x3af/0x500 [ 56.484118] do_syscall_64+0x3f/0x90 [ 56.484618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.485307] RIP: 0033:0x7fc2407d5d82 [ 56.485790] 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 [ 56.488013] RSP: 002b:00007ffc6c1ca3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.488973] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2407d5d82 [ 56.489854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc23fc0f000 [ 56.490740] RBP: 00007fc23fc0f000 R08: 0000000000000009 R09: 0000000000001000 [ 56.491624] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625878bbec0 [ 56.492507] R13: 00007ffc6c1ca3f0 R14: 00007ffc6c1ca420 R15: 00007ffc6c1ca780 [ 56.493415] [ 56.493719] [ 56.493944] Allocated by task 213: [ 56.494381] kasan_save_stack+0x22/0x50 [ 56.494897] kasan_set_track+0x25/0x30 [ 56.495407] __kasan_slab_alloc+0x59/0x70 [ 56.495957] kmem_cache_alloc+0x16b/0x370 [ 56.496502] vm_area_dup+0x20/0x160 [ 56.496981] __split_vma+0x170/0x950 [ 56.497467] split_vma+0xc6/0x110 [ 56.497928] mprotect_fixup+0x8d2/0xb30 [ 56.498450] do_mprotect_pkey+0x87e/0xd40 [ 56.498989] __x64_sys_mprotect+0x78/0xc0 [ 56.499532] do_syscall_64+0x3f/0x90 [ 56.500025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.500693] [ 56.500930] Freed by task 203: [ 56.501333] kasan_save_stack+0x22/0x50 [ 56.501851] kasan_set_track+0x25/0x30 [ 56.502359] kasan_save_free_info+0x2b/0x50 [ 56.502920] __kasan_slab_free+0x10a/0x190 [ 56.503479] kmem_cache_free+0x10d/0x4d0 [ 56.504001] rcu_core+0x8c8/0x2860 [ 56.504459] __do_softirq+0x1b7/0x7d4 [ 56.504964] [ 56.505181] Last potentially related work creation: [ 56.505790] kasan_save_stack+0x22/0x50 [ 56.506311] __kasan_record_aux_stack+0x8e/0xa0 [ 56.506909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.507571] remove_vma+0x139/0x170 [ 56.508036] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.508619] do_vmi_munmap+0x1f1/0x2b0 [ 56.509149] __vm_munmap+0x138/0x3a0 [ 56.509636] __x64_sys_munmap+0x59/0x80 [ 56.510151] do_syscall_64+0x3f/0x90 [ 56.510647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.511305] [ 56.511529] The buggy address belongs to the object at ffff888016cc8d98 [ 56.511529] which belongs to the cache vm_area_struct of size 168 [ 56.513049] The buggy address is located 88 bytes inside of [ 56.513049] freed 168-byte region [ffff888016cc8d98, ffff888016cc8e40) [ 56.514503] [ 56.514727] The buggy address belongs to the physical page: [ 56.515412] page:0000000027b3aa02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cc8 [ 56.516537] memcg:ffff888018368e01 [ 56.516994] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.517662] page_type: 0xffffffff() [ 56.518125] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.519085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018368e01 [ 56.520033] page dumped because: kasan: bad access detected [ 56.520720] [ 56.520955] Memory state around the buggy address: [ 56.521558] ffff888016cc8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 56.522456] ffff888016cc8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 56.523339] >ffff888016cc8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 56.524229] ^ [ 56.525087] ffff888016cc8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 56.525983] ffff888016cc8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.526875] ================================================================== [ 56.527918] Disabling lock debugging due to kernel taint [ 58.496845] BUG: Bad rss-counter state mm:000000001c1ff05d type:MM_FILEPAGES val:33 [ 58.498095] BUG: Bad rss-counter state mm:000000001c1ff05d type:MM_ANONPAGES val:22 [ 58.909670] BUG: Bad rss-counter state mm:000000009d59a60e type:MM_FILEPAGES val:33 [ 58.911352] BUG: Bad rss-counter state mm:000000009d59a60e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35551' (ECDSA) to the list of known hosts. 2023/06/19 18:53:56 fuzzer started 2023/06/19 18:53:56 dialing manager at localhost:44161 2023/06/19 18:53:56 checking machine... 2023/06/19 18:53:56 checking revisions... [ 59.584627] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:53:56 testing simple program... [ 59.630721] cgroup: Unknown subsys name 'net' [ 59.673980] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:53:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f0f3bd06430 CR3=000000000d63e000 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=7880ed1f9ff929a94542f147347fa2ae XMM02=eff9b2d0a8fce9cb000000000011d910 XMM03=2c67c8bc2e329bc3000000000011da38 XMM04=b858f8680bd6f19d00000000000ae988 XMM05=54f69ca85bd070120000000000135488 XMM06=19e9129bd510f2350000000000134320 XMM07=fb795ef6d65770560000000000124818 XMM08=2c67c8bc2e329bc3000000000011da38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016dc203fb4 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000053873 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef19c R11=0000000000000001 R12=0000000000053873 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 00007f90a81a8900 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=00007f90a875f618 CR3=0000000006a70000 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