syzkaller login: [ 30.637725] BUG: Bad rss-counter state mm:000000006235c2ca type:MM_FILEPAGES val:33 [ 30.638920] BUG: Bad rss-counter state mm:000000006235c2ca type:MM_ANONPAGES val:22 [ 30.793779] ================================================================== [ 30.794686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.795596] Read of size 8 at addr ffff888018998c20 by task sshd/221 [ 30.796366] [ 30.796584] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.797525] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.798504] Call Trace: [ 30.798830] [ 30.799110] dump_stack_lvl+0x91/0xf0 [ 30.799609] print_report+0xcc/0x620 [ 30.800092] ? __virt_addr_valid+0x102/0x340 [ 30.800648] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.801261] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.801871] kasan_report+0xbe/0xf0 [ 30.802342] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.802975] vma_interval_tree_remove+0xc75/0xec0 [ 30.803577] vma_prepare+0xc54/0x11a0 [ 30.804052] __split_vma+0x5af/0x950 [ 30.804526] ? __pfx___split_vma+0x10/0x10 [ 30.805047] ? find_held_lock+0x2c/0x110 [ 30.805558] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.806113] ? lock_is_held_type+0x9f/0x120 [ 30.806657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.807260] ? mtree_range_walk+0x632/0x900 [ 30.807809] ? mas_walk+0x5c7/0x7c0 [ 30.808286] do_vmi_munmap+0x1f1/0x2b0 [ 30.808782] mmap_region+0x1f9/0x2660 [ 30.809262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.809764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.810479] ? __pfx_lock_acquire+0x10/0x10 [ 30.811024] ? __pfx_mmap_region+0x10/0x10 [ 30.811552] ? security_mmap_addr+0x7d/0xa0 [ 30.812071] ? get_unmapped_area+0x1f5/0x3f0 [ 30.812620] do_mmap+0x854/0xf00 [ 30.813055] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.813555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.814111] ksys_mmap_pgoff+0x3af/0x500 [ 30.814628] do_syscall_64+0x3f/0x90 [ 30.815111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815746] RIP: 0033:0x7f29b6f9ad82 [ 30.816192] 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 [ 30.818315] RSP: 002b:00007ffdef89c668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.819240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29b6f9ad82 [ 30.820093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29b63d4000 [ 30.820937] RBP: 00007f29b63d4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.821781] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e8c6dcf70 [ 30.822641] R13: 00007ffdef89c680 R14: 00007ffdef89c6b0 R15: 00007ffdef89ca10 [ 30.823504] [ 30.823796] [ 30.824010] Allocated by task 214: [ 30.824430] kasan_save_stack+0x22/0x50 [ 30.824933] kasan_set_track+0x25/0x30 [ 30.825422] __kasan_slab_alloc+0x59/0x70 [ 30.825952] kmem_cache_alloc+0x16b/0x370 [ 30.826469] vm_area_dup+0x20/0x160 [ 30.826930] __split_vma+0x170/0x950 [ 30.827394] split_vma+0xc6/0x110 [ 30.827835] mprotect_fixup+0x8d2/0xb30 [ 30.828337] do_mprotect_pkey+0x87e/0xd40 [ 30.828859] __x64_sys_mprotect+0x78/0xc0 [ 30.829372] do_syscall_64+0x3f/0x90 [ 30.829847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830480] [ 30.830704] Freed by task 214: [ 30.831098] kasan_save_stack+0x22/0x50 [ 30.831599] kasan_set_track+0x25/0x30 [ 30.832082] kasan_save_free_info+0x2b/0x50 [ 30.832611] __kasan_slab_free+0x10a/0x190 [ 30.833145] kmem_cache_free+0x10d/0x4d0 [ 30.833653] rcu_core+0x8c8/0x2860 [ 30.834097] __do_softirq+0x1b7/0x7d4 [ 30.834594] [ 30.834813] Last potentially related work creation: [ 30.835398] kasan_save_stack+0x22/0x50 [ 30.835892] __kasan_record_aux_stack+0x8e/0xa0 [ 30.836457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.837098] remove_vma+0x139/0x170 [ 30.837542] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.838100] do_vmi_munmap+0x1f1/0x2b0 [ 30.838588] __vm_munmap+0x138/0x3a0 [ 30.839063] __x64_sys_munmap+0x59/0x80 [ 30.839546] do_syscall_64+0x3f/0x90 [ 30.840019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840648] [ 30.840859] The buggy address belongs to the object at ffff888018998bc8 [ 30.840859] which belongs to the cache vm_area_struct of size 168 [ 30.842327] The buggy address is located 88 bytes inside of [ 30.842327] freed 168-byte region [ffff888018998bc8, ffff888018998c70) [ 30.843751] [ 30.843968] The buggy address belongs to the physical page: [ 30.844627] page:0000000055e5d314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18998 [ 30.845701] memcg:ffff888019de6a01 [ 30.846235] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.846890] page_type: 0xffffffff() [ 30.847329] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.848245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019de6a01 [ 30.849156] page dumped because: kasan: bad access detected [ 30.849818] [ 30.850026] Memory state around the buggy address: [ 30.850621] ffff888018998b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.851472] ffff888018998b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.852311] >ffff888018998c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.853159] ^ [ 30.853694] ffff888018998c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.854542] ffff888018998d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.855392] ================================================================== [ 30.856456] Disabling lock debugging due to kernel taint [ 33.029799] BUG: Bad rss-counter state mm:0000000029a1d9d1 type:MM_FILEPAGES val:33 [ 33.030834] BUG: Bad rss-counter state mm:0000000029a1d9d1 type:MM_ANONPAGES val:22 [ 33.499552] BUG: Bad rss-counter state mm:0000000055787395 type:MM_FILEPAGES val:33 [ 33.500551] BUG: Bad rss-counter state mm:0000000055787395 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63841' (ECDSA) to the list of known hosts. 2023/06/20 12:39:03 fuzzer started 2023/06/20 12:39:03 dialing manager at localhost:36067 2023/06/20 12:39:03 checking machine... 2023/06/20 12:39:03 checking revisions... [ 34.213642] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:39:03 testing simple program... [ 34.255352] cgroup: Unknown subsys name 'net' [ 34.315190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:39:03 Registers: info registers vcpu 0 RAX=ffff888014750001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801474fe01 RSI=ffff88801474fe70 RDI=ffff88801474f528 RBP=ffff88801474fe70 RSP=ffff88801474f480 R8 =ffffffff86126f0e R9 =ffff88801474f558 R10=0000000000038001 R11=000000000001ddab R12=0000000000000008 R13=ffff888014748000 R14=ffff88801474fe78 R15=ffff88801474f518 RIP=ffffffff811304ce RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3a1856e900 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=00007f3a179c8cc0 CR3=00000000102ac000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c329441f9ec313e700000000000ae988 XMM05=d6d24d84d758641d0000000000132e38 XMM06=c291bd5c70af25b90000000000131ed8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d358 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100120ef43 RSP=ffff8880090779e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff856cd6a0 R13=ffffffff81787d2a R14=0000000000000cc0 R15=ffffffff8366a63c RIP=ffffffff8180f03d RFL=00000282 [--S----] 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 00007fdd68166900 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=00007ffdab2c6000 CR3=000000000e0bc000 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