syzkaller login: [ 28.919824] BUG: Bad rss-counter state mm:0000000041bfce7f type:MM_FILEPAGES val:33 [ 28.921106] BUG: Bad rss-counter state mm:0000000041bfce7f type:MM_ANONPAGES val:22 [ 28.964075] ================================================================== [ 28.965079] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.966037] Read of size 8 at addr ffff8880144a4058 by task sshd/222 [ 28.966821] [ 28.967068] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.967951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.968958] Call Trace: [ 28.969289] [ 28.969581] dump_stack_lvl+0x91/0xf0 [ 28.970068] print_report+0xcc/0x620 [ 28.970831] ? __virt_addr_valid+0x102/0x340 [ 28.971544] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.972166] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.972796] kasan_report+0xbe/0xf0 [ 28.973300] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.973931] vma_interval_tree_remove+0xc75/0xec0 [ 28.974549] vma_prepare+0xc54/0x11a0 [ 28.975047] __split_vma+0x5af/0x950 [ 28.975537] ? __pfx___split_vma+0x10/0x10 [ 28.976072] ? find_held_lock+0x2c/0x110 [ 28.976615] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.977192] ? lock_is_held_type+0x9f/0x120 [ 28.977747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.978392] ? mtree_range_walk+0x632/0x900 [ 28.978962] ? mas_walk+0x5c7/0x7c0 [ 28.979452] do_vmi_munmap+0x1f1/0x2b0 [ 28.979953] mmap_region+0x1f9/0x2660 [ 28.980454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.981003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.981750] ? __pfx_lock_acquire+0x10/0x10 [ 28.982317] ? __pfx_mmap_region+0x10/0x10 [ 28.982847] ? security_mmap_addr+0x7d/0xa0 [ 28.983421] ? get_unmapped_area+0x1f5/0x3f0 [ 28.983975] do_mmap+0x854/0xf00 [ 28.984431] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.984928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.985514] ksys_mmap_pgoff+0x3af/0x500 [ 28.986032] do_syscall_64+0x3f/0x90 [ 28.986534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.987212] RIP: 0033:0x7f172ceced82 [ 28.987686] 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 [ 28.989843] RSP: 002b:00007ffee6daab18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.990753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f172ceced82 [ 28.991626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f172c308000 [ 28.992494] RBP: 00007f172c308000 R08: 0000000000000009 R09: 0000000000001000 [ 28.993363] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562305117f70 [ 28.994208] R13: 00007ffee6daab30 R14: 00007ffee6daab60 R15: 00007ffee6daaec0 [ 28.995094] [ 28.995399] [ 28.995613] Allocated by task 214: [ 28.996043] kasan_save_stack+0x22/0x50 [ 28.996563] kasan_set_track+0x25/0x30 [ 28.997053] __kasan_slab_alloc+0x59/0x70 [ 28.997595] kmem_cache_alloc+0x16b/0x370 [ 28.998158] vm_area_dup+0x20/0x160 [ 28.998634] __split_vma+0x170/0x950 [ 28.999115] split_vma+0xc6/0x110 [ 28.999572] mprotect_fixup+0x8d2/0xb30 [ 29.000074] do_mprotect_pkey+0x87e/0xd40 [ 29.000609] __x64_sys_mprotect+0x78/0xc0 [ 29.001127] do_syscall_64+0x3f/0x90 [ 29.001611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.002274] [ 29.002492] Freed by task 214: [ 29.002878] kasan_save_stack+0x22/0x50 [ 29.003437] kasan_set_track+0x25/0x30 [ 29.003926] kasan_save_free_info+0x2b/0x50 [ 29.004475] __kasan_slab_free+0x10a/0x190 [ 29.005006] kmem_cache_free+0x10d/0x4d0 [ 29.005532] rcu_core+0x8c8/0x2860 [ 29.005970] __do_softirq+0x1b7/0x7d4 [ 29.006459] [ 29.006679] Last potentially related work creation: [ 29.007284] kasan_save_stack+0x22/0x50 [ 29.007784] __kasan_record_aux_stack+0x8e/0xa0 [ 29.008385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.009025] remove_vma+0x139/0x170 [ 29.009494] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.010052] do_vmi_munmap+0x1f1/0x2b0 [ 29.010556] __vm_munmap+0x138/0x3a0 [ 29.011031] __x64_sys_munmap+0x59/0x80 [ 29.011540] do_syscall_64+0x3f/0x90 [ 29.012010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.012674] [ 29.012887] The buggy address belongs to the object at ffff8880144a4000 [ 29.012887] which belongs to the cache vm_area_struct of size 168 [ 29.014561] The buggy address is located 88 bytes inside of [ 29.014561] freed 168-byte region [ffff8880144a4000, ffff8880144a40a8) [ 29.015989] [ 29.016217] The buggy address belongs to the physical page: [ 29.016879] page:000000003334c9c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144a4 [ 29.017975] memcg:ffff888016f14801 [ 29.018437] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.019090] page_type: 0xffffffff() [ 29.019564] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.020486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f14801 [ 29.021386] page dumped because: kasan: bad access detected [ 29.022039] [ 29.022270] Memory state around the buggy address: [ 29.022847] ffff8880144a3f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 29.023748] ffff8880144a3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.024624] >ffff8880144a4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.025484] ^ [ 29.026208] ffff8880144a4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 29.027079] ffff8880144a4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.027932] ================================================================== [ 29.028872] Disabling lock debugging due to kernel taint [ 31.206856] BUG: Bad rss-counter state mm:000000001e5c4c62 type:MM_FILEPAGES val:33 [ 31.208326] BUG: Bad rss-counter state mm:000000001e5c4c62 type:MM_ANONPAGES val:22 [ 31.627301] BUG: Bad rss-counter state mm:00000000b9070852 type:MM_FILEPAGES val:33 [ 31.628327] BUG: Bad rss-counter state mm:00000000b9070852 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49208' (ECDSA) to the list of known hosts. 2023/06/21 07:51:24 fuzzer started 2023/06/21 07:51:25 dialing manager at localhost:36067 2023/06/21 07:51:25 checking machine... 2023/06/21 07:51:25 checking revisions... [ 32.343565] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:51:25 testing simple program... [ 32.396577] cgroup: Unknown subsys name 'net' [ 32.449783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:51:24 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ad0 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=00007f303f962bd0 CR3=0000000019ab0000 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=2034323a31353a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b5080 RBX=0000000000000001 RCX=ffffffff8450cc7e RDX=000000000000000d RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffff888008ebf0a8 RSP=ffff888008ebefd0 R8 =ffffffff864b2008 R9 =ffff888008ebf090 R10=0000000000038001 R11=00000000000b5080 R12=ffff888008ebf0b0 R13=ffff888008ebf098 R14=ffff888008ebf091 R15=ffff888008ebf050 RIP=ffffffff8112fc12 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 00007f233704f900 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=00007f2337014008 CR3=0000000015a9a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000