syzkaller login: [ 31.189288] BUG: Bad rss-counter state mm:000000004d1cc89c type:MM_FILEPAGES val:33 [ 31.190475] BUG: Bad rss-counter state mm:000000004d1cc89c type:MM_ANONPAGES val:22 [ 31.228856] ================================================================== [ 31.229864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.231041] Read of size 8 at addr ffff88800f12f5c8 by task sshd/221 [ 31.232023] [ 31.232258] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.233186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.234217] Call Trace: [ 31.234554] [ 31.234852] dump_stack_lvl+0x91/0xf0 [ 31.235378] print_report+0xcc/0x620 [ 31.235892] ? __virt_addr_valid+0x102/0x340 [ 31.236496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237150] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237803] kasan_report+0xbe/0xf0 [ 31.238313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.238991] vma_interval_tree_remove+0xc75/0xec0 [ 31.239648] vma_prepare+0xc54/0x11a0 [ 31.240173] __split_vma+0x5af/0x950 [ 31.240698] ? __pfx___split_vma+0x10/0x10 [ 31.241275] ? find_held_lock+0x2c/0x110 [ 31.241854] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.242472] ? lock_is_held_type+0x9f/0x120 [ 31.243060] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.243723] ? mtree_range_walk+0x632/0x900 [ 31.244340] ? mas_walk+0x5c7/0x7c0 [ 31.244865] do_vmi_munmap+0x1f1/0x2b0 [ 31.245405] mmap_region+0x1f9/0x2660 [ 31.245932] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.246493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.247276] ? __pfx_lock_acquire+0x10/0x10 [ 31.247865] ? __pfx_mmap_region+0x10/0x10 [ 31.248464] ? security_mmap_addr+0x7d/0xa0 [ 31.249050] ? get_unmapped_area+0x1f5/0x3f0 [ 31.249654] do_mmap+0x854/0xf00 [ 31.250129] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.250671] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.251285] ksys_mmap_pgoff+0x3af/0x500 [ 31.251843] do_syscall_64+0x3f/0x90 [ 31.252373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253096] RIP: 0033:0x7efcfa047d82 [ 31.253601] 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 [ 31.255951] RSP: 002b:00007ffdab10ced8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.256962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcfa047d82 [ 31.257899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcf9481000 [ 31.258840] RBP: 00007efcf9481000 R08: 0000000000000009 R09: 0000000000001000 [ 31.259778] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8b2bcfb20 [ 31.260727] R13: 00007ffdab10cef0 R14: 00007ffdab10cf20 R15: 00007ffdab10d280 [ 31.261667] [ 31.262060] [ 31.262299] Allocated by task 214: [ 31.262770] kasan_save_stack+0x22/0x50 [ 31.263316] kasan_set_track+0x25/0x30 [ 31.263852] __kasan_slab_alloc+0x59/0x70 [ 31.264419] kmem_cache_alloc+0x16b/0x370 [ 31.264974] vm_area_dup+0x20/0x160 [ 31.265464] __split_vma+0x170/0x950 [ 31.265971] split_vma+0xc6/0x110 [ 31.266442] mprotect_fixup+0x8d2/0xb30 [ 31.266984] do_mprotect_pkey+0x87e/0xd40 [ 31.267544] __x64_sys_mprotect+0x78/0xc0 [ 31.268100] do_syscall_64+0x3f/0x90 [ 31.268615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269295] [ 31.269524] Freed by task 214: [ 31.269947] kasan_save_stack+0x22/0x50 [ 31.270499] kasan_set_track+0x25/0x30 [ 31.271032] kasan_save_free_info+0x2b/0x50 [ 31.271613] __kasan_slab_free+0x10a/0x190 [ 31.272202] kmem_cache_free+0x10d/0x4d0 [ 31.272777] rcu_core+0x8c8/0x2860 [ 31.273249] __do_softirq+0x1b7/0x7d4 [ 31.273759] [ 31.273988] Last potentially related work creation: [ 31.274607] kasan_save_stack+0x22/0x50 [ 31.275142] __kasan_record_aux_stack+0x8e/0xa0 [ 31.275751] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.276438] remove_vma+0x139/0x170 [ 31.276929] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.277517] do_vmi_munmap+0x1f1/0x2b0 [ 31.278034] __vm_munmap+0x138/0x3a0 [ 31.278530] __x64_sys_munmap+0x59/0x80 [ 31.279057] do_syscall_64+0x3f/0x90 [ 31.279565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280261] [ 31.280516] The buggy address belongs to the object at ffff88800f12f570 [ 31.280516] which belongs to the cache vm_area_struct of size 168 [ 31.282083] The buggy address is located 88 bytes inside of [ 31.282083] freed 168-byte region [ffff88800f12f570, ffff88800f12f618) [ 31.283574] [ 31.283822] The buggy address belongs to the physical page: [ 31.284530] page:0000000040f9e268 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf12f [ 31.285611] memcg:ffff88801a968901 [ 31.286038] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.286686] page_type: 0xffffffff() [ 31.287139] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.288101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a968901 [ 31.289115] page dumped because: kasan: bad access detected [ 31.289855] [ 31.290092] Memory state around the buggy address: [ 31.290721] ffff88800f12f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.291613] ffff88800f12f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.292484] >ffff88800f12f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.293373] ^ [ 31.294073] ffff88800f12f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.294967] ffff88800f12f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.295872] ================================================================== [ 31.296848] Disabling lock debugging due to kernel taint [ 34.954172] BUG: Bad rss-counter state mm:00000000c8bd8f48 type:MM_FILEPAGES val:33 [ 34.955080] BUG: Bad rss-counter state mm:00000000c8bd8f48 type:MM_ANONPAGES val:22 [ 35.423671] BUG: Bad rss-counter state mm:00000000af5d46d1 type:MM_FILEPAGES val:33 [ 35.424999] BUG: Bad rss-counter state mm:00000000af5d46d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22764' (ECDSA) to the list of known hosts. 2023/06/21 00:21:30 fuzzer started 2023/06/21 00:21:30 dialing manager at localhost:36067 2023/06/21 00:21:30 checking machine... 2023/06/21 00:21:30 checking revisions... [ 36.137609] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:21:30 testing simple program... [ 36.190796] cgroup: Unknown subsys name 'net' [ 36.297467] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:30 Registers: info registers vcpu 0 RAX=1ffff1100281fe66 RBX=ffffffff813ad470 RCX=ffff8880140ff388 RDX=0000000000000001 RSI=ffff8880140ff380 RDI=ffff8880140ff2e8 RBP=ffff8880140ff380 RSP=ffff8880140ff2e0 R8 =0000000000000001 R9 =ffff8880140ff328 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880140ff3b0 R13=0000000000000000 R14=ffff88801417b680 R15=0000000000092820 RIP=ffffffff81130344 RFL=00000202 [-------] 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 00007f03e3a66900 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=00007f03e2e61ff0 CR3=000000000f580000 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=72aa203c9772b0ad3d42dce0d200528d XMM02=eff9b2d0a8fce9cb0000000000119d08 XMM03=2c67c8bc2e329bc30000000000119e30 XMM04=bb24cad96ca58abf00000000000ae988 XMM05=badde814b6574c9800000000001323f0 XMM06=c291bd5c70af25b90000000000131628 XMM07=fb795ef6d657705600000000001216d8 XMM08=2c67c8bc2e329bc30000000000119e30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85fa53dc RCX=ffffffff8363e260 RDX=0000000000000000 RSI=ffffffff863b3c26 RDI=ffffffff85fa53d8 RBP=ffffffff85fa53d8 RSP=ffff8880102df0a0 R8 =ffffffff863b3c26 R9 =ffff8880102df198 R10=0000000000038001 R11=000000000008aa85 R12=ffffffff85fa53d8 R13=ffffffff85fa53d8 R14=ffffffff85fa53d8 R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000246 [---Z-P-] 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 00007f0303a4c900 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=00007f0304003618 CR3=000000000eb62000 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