syzkaller login: [ 31.907819] BUG: Bad rss-counter state mm:000000007013dab8 type:MM_FILEPAGES val:33 [ 31.908843] BUG: Bad rss-counter state mm:000000007013dab8 type:MM_ANONPAGES val:22 [ 32.073679] ================================================================== [ 32.074605] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.075562] Read of size 8 at addr ffff888015eead08 by task sshd/220 [ 32.076341] [ 32.076662] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.077527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.078509] Call Trace: [ 32.078915] [ 32.079206] dump_stack_lvl+0x91/0xf0 [ 32.079711] print_report+0xcc/0x620 [ 32.080218] ? __virt_addr_valid+0x102/0x340 [ 32.080769] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.081397] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.082016] kasan_report+0xbe/0xf0 [ 32.082504] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.083144] vma_interval_tree_remove+0xc75/0xec0 [ 32.083764] vma_prepare+0xc54/0x11a0 [ 32.084255] __split_vma+0x5af/0x950 [ 32.084732] ? __pfx___split_vma+0x10/0x10 [ 32.085266] ? find_held_lock+0x2c/0x110 [ 32.085795] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.086371] ? lock_is_held_type+0x9f/0x120 [ 32.086918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.087540] ? mtree_range_walk+0x632/0x900 [ 32.088135] ? mas_walk+0x5c7/0x7c0 [ 32.088616] do_vmi_munmap+0x1f1/0x2b0 [ 32.089116] mmap_region+0x1f9/0x2660 [ 32.089602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.090132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.090865] ? __pfx_lock_acquire+0x10/0x10 [ 32.091404] ? __pfx_mmap_region+0x10/0x10 [ 32.091952] ? security_mmap_addr+0x7d/0xa0 [ 32.092495] ? get_unmapped_area+0x1f5/0x3f0 [ 32.093042] do_mmap+0x854/0xf00 [ 32.093479] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.093989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.094573] ksys_mmap_pgoff+0x3af/0x500 [ 32.095084] do_syscall_64+0x3f/0x90 [ 32.095569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.096252] RIP: 0033:0x7fb557351d82 [ 32.096713] 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 [ 32.098852] RSP: 002b:00007fff9cfbf168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.099785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb557351d82 [ 32.100631] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb55678b000 [ 32.101498] RBP: 00007fb55678b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.102354] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620dd479ec0 [ 32.103223] R13: 00007fff9cfbf180 R14: 00007fff9cfbf1b0 R15: 00007fff9cfbf510 [ 32.104099] [ 32.104396] [ 32.104613] Allocated by task 212: [ 32.105049] kasan_save_stack+0x22/0x50 [ 32.105561] kasan_set_track+0x25/0x30 [ 32.106067] __kasan_slab_alloc+0x59/0x70 [ 32.106603] kmem_cache_alloc+0x16b/0x370 [ 32.107136] vm_area_dup+0x20/0x160 [ 32.107594] __split_vma+0x170/0x950 [ 32.108117] split_vma+0xc6/0x110 [ 32.108560] mprotect_fixup+0x8d2/0xb30 [ 32.109067] do_mprotect_pkey+0x87e/0xd40 [ 32.109595] __x64_sys_mprotect+0x78/0xc0 [ 32.110121] do_syscall_64+0x3f/0x90 [ 32.110601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.111257] [ 32.111472] Freed by task 203: [ 32.111873] kasan_save_stack+0x22/0x50 [ 32.112379] kasan_set_track+0x25/0x30 [ 32.112872] kasan_save_free_info+0x2b/0x50 [ 32.113415] __kasan_slab_free+0x10a/0x190 [ 32.113957] kmem_cache_free+0x10d/0x4d0 [ 32.114463] rcu_core+0x8c8/0x2860 [ 32.114909] __do_softirq+0x1b7/0x7d4 [ 32.115388] [ 32.115608] Last potentially related work creation: [ 32.116202] kasan_save_stack+0x22/0x50 [ 32.116708] __kasan_record_aux_stack+0x8e/0xa0 [ 32.117285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.117940] remove_vma+0x139/0x170 [ 32.118394] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.118964] do_vmi_munmap+0x1f1/0x2b0 [ 32.119454] __vm_munmap+0x138/0x3a0 [ 32.119952] __x64_sys_munmap+0x59/0x80 [ 32.120454] do_syscall_64+0x3f/0x90 [ 32.120935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.121583] [ 32.121804] Second to last potentially related work creation: [ 32.122496] kasan_save_stack+0x22/0x50 [ 32.123012] __kasan_record_aux_stack+0x8e/0xa0 [ 32.123588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.124247] remove_vma+0x139/0x170 [ 32.124700] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.125262] do_vmi_munmap+0x1f1/0x2b0 [ 32.125749] mmap_region+0x1f9/0x2660 [ 32.126227] do_mmap+0x854/0xf00 [ 32.126659] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.127154] ksys_mmap_pgoff+0x3af/0x500 [ 32.127658] do_syscall_64+0x3f/0x90 [ 32.128160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.128798] [ 32.129015] The buggy address belongs to the object at ffff888015eeacb0 [ 32.129015] which belongs to the cache vm_area_struct of size 168 [ 32.130476] The buggy address is located 88 bytes inside of [ 32.130476] freed 168-byte region [ffff888015eeacb0, ffff888015eead58) [ 32.131889] [ 32.132110] The buggy address belongs to the physical page: [ 32.132792] page:00000000f1828aca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15eea [ 32.133900] memcg:ffff888015ef4601 [ 32.134335] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.134986] page_type: 0xffffffff() [ 32.135441] raw: 0100000000000200 ffff8880087a0c80 ffffea000057b8c0 0000000000000004 [ 32.136403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ef4601 [ 32.137326] page dumped because: kasan: bad access detected [ 32.137991] [ 32.138214] Memory state around the buggy address: [ 32.138795] ffff888015eeac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.139656] ffff888015eeac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.140529] >ffff888015eead00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.141415] ^ [ 32.141864] ffff888015eead80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.142734] ffff888015eeae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.143593] ================================================================== [ 32.144677] Disabling lock debugging due to kernel taint [ 34.779915] BUG: Bad rss-counter state mm:00000000d194b897 type:MM_FILEPAGES val:33 [ 34.780590] BUG: Bad rss-counter state mm:00000000d194b897 type:MM_ANONPAGES val:22 [ 35.295697] BUG: Bad rss-counter state mm:00000000d050e8d9 type:MM_FILEPAGES val:33 [ 35.296726] BUG: Bad rss-counter state mm:00000000d050e8d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63258' (ECDSA) to the list of known hosts. 2023/06/20 21:52:02 fuzzer started 2023/06/20 21:52:03 dialing manager at localhost:36067 2023/06/20 21:52:03 checking machine... 2023/06/20 21:52:03 checking revisions... [ 36.027228] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:52:03 testing simple program... [ 36.082371] cgroup: Unknown subsys name 'net' [ 36.121406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:52:02 Registers: info registers vcpu 0 RAX=0000000080010050 RBX=0000000000000001 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800a670000 RSP=ffff88806ce09db8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=ffff88806ce09ff8 R12=00000000000103f6 R13=ffff88800a670180 R14=ffff88800a6744c8 R15=ffff88800a670008 RIP=ffffffff8219168f RFL=00000046 [---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 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=000055fb06440290 CR3=000000000e25c000 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=2032303a32353a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32353a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180b006 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880166b7c01 RSI=ffff8880166b7c78 RDI=ffff8880166b7c78 RBP=ffff8880166b7a58 RSP=ffff8880166b7990 R8 =ffffffff8613f6a6 R9 =ffff8880166b7a40 R10=0000000000038001 R11=0000000000021eef R12=ffff8880166b7a60 R13=ffff8880166b7a48 R14=ffff8880166b7c80 R15=ffff8880166b7a00 RIP=ffffffff81131041 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 00007f9e5c0c5900 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=00007f9e5c67c618 CR3=000000000fc96000 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