syzkaller login: [ 61.381228] BUG: Bad rss-counter state mm:00000000fa7cdb46 type:MM_FILEPAGES val:33 [ 61.382213] BUG: Bad rss-counter state mm:00000000fa7cdb46 type:MM_ANONPAGES val:22 [ 61.549592] ================================================================== [ 61.550690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.551875] Read of size 8 at addr ffff888016c596b0 by task sshd/220 [ 61.552640] [ 61.552859] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 61.553867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.554879] Call Trace: [ 61.555195] [ 61.555475] dump_stack_lvl+0x91/0xf0 [ 61.555954] print_report+0xcc/0x620 [ 61.556431] ? __virt_addr_valid+0x102/0x340 [ 61.556979] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.557594] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.558221] kasan_report+0xbe/0xf0 [ 61.558731] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.559345] vma_interval_tree_remove+0xc75/0xec0 [ 61.559944] vma_prepare+0xc54/0x11a0 [ 61.560421] __split_vma+0x5af/0x950 [ 61.560890] ? __pfx___split_vma+0x10/0x10 [ 61.561426] ? find_held_lock+0x2c/0x110 [ 61.561935] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.562492] ? lock_is_held_type+0x9f/0x120 [ 61.563056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.563661] ? mtree_range_walk+0x632/0x900 [ 61.564210] ? mas_walk+0x5c7/0x7c0 [ 61.564682] do_vmi_munmap+0x1f1/0x2b0 [ 61.565171] mmap_region+0x1f9/0x2660 [ 61.565653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.566155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.566928] ? __pfx_lock_acquire+0x10/0x10 [ 61.567462] ? __pfx_mmap_region+0x10/0x10 [ 61.567996] ? security_mmap_addr+0x7d/0xa0 [ 61.568532] ? get_unmapped_area+0x1f5/0x3f0 [ 61.569090] do_mmap+0x854/0xf00 [ 61.569532] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.570032] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.570607] ksys_mmap_pgoff+0x3af/0x500 [ 61.571117] do_syscall_64+0x3f/0x90 [ 61.571600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.572266] RIP: 0033:0x7fbcff192d82 [ 61.572725] 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 [ 61.574837] RSP: 002b:00007ffeae9465f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.575733] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcff192d82 [ 61.576577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcfe5cc000 [ 61.577420] RBP: 00007fbcfe5cc000 R08: 0000000000000009 R09: 0000000000001000 [ 61.578256] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627863deec0 [ 61.579100] R13: 00007ffeae946610 R14: 00007ffeae946640 R15: 00007ffeae9469a0 [ 61.579949] [ 61.580239] [ 61.580453] Allocated by task 213: [ 61.580875] kasan_save_stack+0x22/0x50 [ 61.581381] kasan_set_track+0x25/0x30 [ 61.581868] __kasan_slab_alloc+0x59/0x70 [ 61.582388] kmem_cache_alloc+0x16b/0x370 [ 61.582911] vm_area_dup+0x20/0x160 [ 61.583363] __split_vma+0x170/0x950 [ 61.583826] split_vma+0xc6/0x110 [ 61.584260] mprotect_fixup+0x8d2/0xb30 [ 61.584757] do_mprotect_pkey+0x87e/0xd40 [ 61.585273] __x64_sys_mprotect+0x78/0xc0 [ 61.585789] do_syscall_64+0x3f/0x90 [ 61.586256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.586902] [ 61.587116] Freed by task 213: [ 61.587504] kasan_save_stack+0x22/0x50 [ 61.588006] kasan_set_track+0x25/0x30 [ 61.588497] kasan_save_free_info+0x2b/0x50 [ 61.589026] __kasan_slab_free+0x10a/0x190 [ 61.589559] kmem_cache_free+0x10d/0x4d0 [ 61.590062] rcu_core+0x8c8/0x2860 [ 61.590504] __do_softirq+0x1b7/0x7d4 [ 61.590997] [ 61.591216] Last potentially related work creation: [ 61.591805] kasan_save_stack+0x22/0x50 [ 61.592308] __kasan_record_aux_stack+0x8e/0xa0 [ 61.592882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.593526] remove_vma+0x139/0x170 [ 61.593973] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.594541] do_vmi_munmap+0x1f1/0x2b0 [ 61.595032] __vm_munmap+0x138/0x3a0 [ 61.595501] __x64_sys_munmap+0x59/0x80 [ 61.595996] do_syscall_64+0x3f/0x90 [ 61.596468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.597098] [ 61.597313] The buggy address belongs to the object at ffff888016c59658 [ 61.597313] which belongs to the cache vm_area_struct of size 168 [ 61.598771] The buggy address is located 88 bytes inside of [ 61.598771] freed 168-byte region [ffff888016c59658, ffff888016c59700) [ 61.600189] [ 61.600410] The buggy address belongs to the physical page: [ 61.601067] page:0000000002cc6c4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c59 [ 61.602153] memcg:ffff88800e060201 [ 61.602593] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.603243] page_type: 0xffffffff() [ 61.603697] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.604606] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e060201 [ 61.605496] page dumped because: kasan: bad access detected [ 61.606154] [ 61.606368] Memory state around the buggy address: [ 61.606952] ffff888016c59580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.607817] ffff888016c59600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.608678] >ffff888016c59680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.609524] ^ [ 61.610110] ffff888016c59700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.610977] ffff888016c59780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.611822] ================================================================== [ 61.612911] Disabling lock debugging due to kernel taint [ 63.451742] BUG: Bad rss-counter state mm:00000000ce2c30b8 type:MM_FILEPAGES val:33 [ 63.452936] BUG: Bad rss-counter state mm:00000000ce2c30b8 type:MM_ANONPAGES val:22 [ 63.779238] BUG: Bad rss-counter state mm:000000007b8d4ad7 type:MM_FILEPAGES val:33 [ 63.780283] BUG: Bad rss-counter state mm:000000007b8d4ad7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45057' (ECDSA) to the list of known hosts. 2023/06/20 03:26:21 fuzzer started 2023/06/20 03:26:21 dialing manager at localhost:44161 2023/06/20 03:26:21 checking machine... 2023/06/20 03:26:21 checking revisions... [ 64.381144] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:26:21 testing simple program... [ 64.428226] cgroup: Unknown subsys name 'net' [ 64.485307] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:25:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880159d0000 RSI=ffffffff818c25a8 RDI=0000000000000006 RBP=00007ffc1f56b600 RSP=ffff888015acf958 R8 =0000000000000006 R9 =00007ffc1f56b5f8 R10=00007ffc1f56b600 R11=0000000000000000 R12=0000000000000000 R13=ffff88800db4bb80 R14=0000000000000345 R15=00007ffc1f56b5f8 RIP=ffffffff818c25ab RFL=00040293 [--S-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 00007ffafa082900 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=00007ffc1f56c000 CR3=000000000ed08000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f2789236cc0 CR3=000000000977c000 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=439de3df4de08288c84b08a95a85099a XMM02=0000000000123998ec2efd57dc4c00df XMM03=0000000000128060f60e267bad491790 XMM04=765cb7013abed31b00000000000ae988 XMM05=19e9129bd510f2350000000000138190 XMM06=7219e5d0243e9a500000000000136ff8 XMM07=e042d86d42eb936e00000000001282e0 XMM08=f60e267bad49179000000000001239f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000