syzkaller login: [ 40.629847] BUG: Bad rss-counter state mm:00000000666092f4 type:MM_FILEPAGES val:33 [ 40.630864] BUG: Bad rss-counter state mm:00000000666092f4 type:MM_ANONPAGES val:22 [ 40.811789] ================================================================== [ 40.812784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.813797] Read of size 8 at addr ffff88800e684140 by task sshd/218 [ 40.814789] [ 40.815031] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.815950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.817019] Call Trace: [ 40.817361] [ 40.817686] dump_stack_lvl+0x91/0xf0 [ 40.818210] print_report+0xcc/0x620 [ 40.818728] ? __virt_addr_valid+0x102/0x340 [ 40.819311] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.819966] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.820619] kasan_report+0xbe/0xf0 [ 40.821128] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.821817] vma_interval_tree_remove+0xc75/0xec0 [ 40.822464] vma_prepare+0xc54/0x11a0 [ 40.822979] __split_vma+0x5af/0x950 [ 40.823490] ? __pfx___split_vma+0x10/0x10 [ 40.824069] ? find_held_lock+0x2c/0x110 [ 40.824638] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.825257] ? lock_is_held_type+0x9f/0x120 [ 40.825844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.826509] ? mtree_range_walk+0x632/0x900 [ 40.827109] ? mas_walk+0x5c7/0x7c0 [ 40.827622] do_vmi_munmap+0x1f1/0x2b0 [ 40.828154] mmap_region+0x1f9/0x2660 [ 40.828681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.829229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.830016] ? __pfx_lock_acquire+0x10/0x10 [ 40.830603] ? __pfx_mmap_region+0x10/0x10 [ 40.831174] ? security_mmap_addr+0x7d/0xa0 [ 40.831755] ? get_unmapped_area+0x1f5/0x3f0 [ 40.832349] do_mmap+0x854/0xf00 [ 40.832831] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.833367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.833988] ksys_mmap_pgoff+0x3af/0x500 [ 40.834542] do_syscall_64+0x3f/0x90 [ 40.835056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.835763] RIP: 0033:0x7f7305e10d82 [ 40.836260] 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 [ 40.838589] RSP: 002b:00007fffa975e718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.839577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7305e10d82 [ 40.840494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f730524a000 [ 40.841418] RBP: 00007f730524a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.842346] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556665750b20 [ 40.843274] R13: 00007fffa975e730 R14: 00007fffa975e760 R15: 00007fffa975eac0 [ 40.844217] [ 40.844534] [ 40.844762] Allocated by task 211: [ 40.845223] kasan_save_stack+0x22/0x50 [ 40.845793] kasan_set_track+0x25/0x30 [ 40.846320] __kasan_slab_alloc+0x59/0x70 [ 40.846886] kmem_cache_alloc+0x16b/0x370 [ 40.847438] vm_area_dup+0x20/0x160 [ 40.847927] __split_vma+0x170/0x950 [ 40.848428] split_vma+0xc6/0x110 [ 40.848905] mprotect_fixup+0x8d2/0xb30 [ 40.849449] do_mprotect_pkey+0x87e/0xd40 [ 40.850016] __x64_sys_mprotect+0x78/0xc0 [ 40.850582] do_syscall_64+0x3f/0x90 [ 40.851096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.851789] [ 40.852017] Freed by task 202: [ 40.852440] kasan_save_stack+0x22/0x50 [ 40.852988] kasan_set_track+0x25/0x30 [ 40.853526] kasan_save_free_info+0x2b/0x50 [ 40.854108] __kasan_slab_free+0x10a/0x190 [ 40.854680] kmem_cache_free+0x10d/0x4d0 [ 40.855331] rcu_core+0x8c8/0x2860 [ 40.855818] __do_softirq+0x1b7/0x7d4 [ 40.856326] [ 40.856562] Last potentially related work creation: [ 40.857186] kasan_save_stack+0x22/0x50 [ 40.857742] __kasan_record_aux_stack+0x8e/0xa0 [ 40.858363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.859059] remove_vma+0x139/0x170 [ 40.859555] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.860153] do_vmi_munmap+0x1f1/0x2b0 [ 40.860680] __vm_munmap+0x138/0x3a0 [ 40.861179] __x64_sys_munmap+0x59/0x80 [ 40.861718] do_syscall_64+0x3f/0x90 [ 40.862230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.862942] [ 40.863173] The buggy address belongs to the object at ffff88800e6840e8 [ 40.863173] which belongs to the cache vm_area_struct of size 168 [ 40.864737] The buggy address is located 88 bytes inside of [ 40.864737] freed 168-byte region [ffff88800e6840e8, ffff88800e684190) [ 40.866265] [ 40.866502] The buggy address belongs to the physical page: [ 40.867222] page:0000000041ac103a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe684 [ 40.868370] memcg:ffff8880096e7e01 [ 40.868830] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.869527] page_type: 0xffffffff() [ 40.870014] raw: 0100000000000200 ffff88800879fc80 ffffea0000379800 dead000000000008 [ 40.870992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096e7e01 [ 40.871960] page dumped because: kasan: bad access detected [ 40.872674] [ 40.872906] Memory state around the buggy address: [ 40.873548] ffff88800e684000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.874479] ffff88800e684080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 40.875405] >ffff88800e684100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.876314] ^ [ 40.876995] ffff88800e684180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.877917] ffff88800e684200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.878822] ================================================================== [ 40.879885] Disabling lock debugging due to kernel taint [ 43.571291] BUG: Bad rss-counter state mm:000000006db4d908 type:MM_FILEPAGES val:33 [ 43.572276] BUG: Bad rss-counter state mm:000000006db4d908 type:MM_ANONPAGES val:22 [ 44.067050] BUG: Bad rss-counter state mm:000000004b8a19fa type:MM_FILEPAGES val:33 [ 44.068064] BUG: Bad rss-counter state mm:000000004b8a19fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38195' (ECDSA) to the list of known hosts. 2023/06/20 02:42:14 fuzzer started 2023/06/20 02:42:14 dialing manager at localhost:44161 2023/06/20 02:42:14 checking machine... 2023/06/20 02:42:14 checking revisions... [ 44.796540] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:42:14 testing simple program... [ 44.842144] cgroup: Unknown subsys name 'net' [ 44.948805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:42:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85407f40 RCX=ffffffff864bd3c2 RDX=1ffff1100d9c1354 RSI=0000000000000000 RDI=ffff88806ce09aa0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bd3c6 R9 =ffff88806ce09ad8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f40 R15=ffff88806ce09a98 RIP=ffffffff81131c83 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 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=0000558dcf088000 CR3=000000000dc90000 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=2034313a32343a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a32343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801bebc130 RCX=0000000000000000 RDX=ffffed10011caf87 RSI=0000000000000008 RDI=ffff88801bebc134 RBP=1ffff110011caf87 RSP=ffff888008e57c30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000202 R13=ffff88801bebc170 R14=ffffffff813782a8 R15=ffff88800c530c38 RIP=ffffffff812e0010 RFL=00000016 [----AP-] 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 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=00007fffbd0f4000 CR3=000000000fdf8000 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=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