syzkaller login: [ 30.112206] BUG: Bad rss-counter state mm:000000000c437731 type:MM_FILEPAGES val:33 [ 30.113768] BUG: Bad rss-counter state mm:000000000c437731 type:MM_ANONPAGES val:22 [ 30.274577] ================================================================== [ 30.275477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.276407] Read of size 8 at addr ffff888019eb6a50 by task sshd/221 [ 30.277278] [ 30.277495] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.278381] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.279346] Call Trace: [ 30.279667] [ 30.279949] dump_stack_lvl+0x91/0xf0 [ 30.280444] print_report+0xcc/0x620 [ 30.280925] ? __virt_addr_valid+0x102/0x340 [ 30.281478] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.282117] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.282728] kasan_report+0xbe/0xf0 [ 30.283203] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.283827] vma_interval_tree_remove+0xc75/0xec0 [ 30.284434] vma_prepare+0xc54/0x11a0 [ 30.284915] __split_vma+0x5af/0x950 [ 30.285387] ? __pfx___split_vma+0x10/0x10 [ 30.285913] ? find_held_lock+0x2c/0x110 [ 30.286480] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.287049] ? lock_is_held_type+0x9f/0x120 [ 30.287593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.288199] ? mtree_range_walk+0x632/0x900 [ 30.288749] ? mas_walk+0x5c7/0x7c0 [ 30.289229] do_vmi_munmap+0x1f1/0x2b0 [ 30.289721] mmap_region+0x1f9/0x2660 [ 30.290264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.290782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.291495] ? __pfx_lock_acquire+0x10/0x10 [ 30.292024] ? __pfx_mmap_region+0x10/0x10 [ 30.292549] ? security_mmap_addr+0x7d/0xa0 [ 30.293080] ? get_unmapped_area+0x1f5/0x3f0 [ 30.293620] do_mmap+0x854/0xf00 [ 30.294106] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.294601] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.295156] ksys_mmap_pgoff+0x3af/0x500 [ 30.295662] do_syscall_64+0x3f/0x90 [ 30.296140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.296787] RIP: 0033:0x7fb1ff3fcd82 [ 30.297241] 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 [ 30.299378] RSP: 002b:00007ffe7711d128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.300277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1ff3fcd82 [ 30.301120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1fe836000 [ 30.301983] RBP: 00007fb1fe836000 R08: 0000000000000009 R09: 0000000000001000 [ 30.302931] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ee8a4ef70 [ 30.303990] R13: 00007ffe7711d140 R14: 00007ffe7711d170 R15: 00007ffe7711d4d0 [ 30.305109] [ 30.305481] [ 30.305754] Allocated by task 214: [ 30.306336] kasan_save_stack+0x22/0x50 [ 30.306969] kasan_set_track+0x25/0x30 [ 30.307584] __kasan_slab_alloc+0x59/0x70 [ 30.308203] kmem_cache_alloc+0x16b/0x370 [ 30.308733] vm_area_dup+0x20/0x160 [ 30.309189] __split_vma+0x170/0x950 [ 30.309660] split_vma+0xc6/0x110 [ 30.310119] mprotect_fixup+0x8d2/0xb30 [ 30.310626] do_mprotect_pkey+0x87e/0xd40 [ 30.311154] __x64_sys_mprotect+0x78/0xc0 [ 30.311680] do_syscall_64+0x3f/0x90 [ 30.312160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.312810] [ 30.313026] Freed by task 214: [ 30.313424] kasan_save_stack+0x22/0x50 [ 30.313962] kasan_set_track+0x25/0x30 [ 30.314471] kasan_save_free_info+0x2b/0x50 [ 30.315012] __kasan_slab_free+0x10a/0x190 [ 30.315546] kmem_cache_free+0x10d/0x4d0 [ 30.316063] rcu_core+0x8c8/0x2860 [ 30.316512] __do_softirq+0x1b7/0x7d4 [ 30.317003] [ 30.317225] Last potentially related work creation: [ 30.317823] kasan_save_stack+0x22/0x50 [ 30.318353] __kasan_record_aux_stack+0x8e/0xa0 [ 30.318929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.319575] remove_vma+0x139/0x170 [ 30.320033] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.320593] do_vmi_munmap+0x1f1/0x2b0 [ 30.321075] __vm_munmap+0x138/0x3a0 [ 30.321544] __x64_sys_munmap+0x59/0x80 [ 30.322051] do_syscall_64+0x3f/0x90 [ 30.322534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.323186] [ 30.323406] Second to last potentially related work creation: [ 30.324099] kasan_save_stack+0x22/0x50 [ 30.324605] __kasan_record_aux_stack+0x8e/0xa0 [ 30.325185] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.325828] remove_vma+0x139/0x170 [ 30.326313] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.326879] do_vmi_munmap+0x1f1/0x2b0 [ 30.327372] mmap_region+0x1f9/0x2660 [ 30.327849] do_mmap+0x854/0xf00 [ 30.328289] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.328774] ksys_mmap_pgoff+0x3af/0x500 [ 30.329282] do_syscall_64+0x3f/0x90 [ 30.329760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.330420] [ 30.330636] The buggy address belongs to the object at ffff888019eb69f8 [ 30.330636] which belongs to the cache vm_area_struct of size 168 [ 30.332128] The buggy address is located 88 bytes inside of [ 30.332128] freed 168-byte region [ffff888019eb69f8, ffff888019eb6aa0) [ 30.333531] [ 30.333746] The buggy address belongs to the physical page: [ 30.334429] page:0000000068f614f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eb6 [ 30.335555] memcg:ffff888018ecaf01 [ 30.335989] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.336651] page_type: 0xffffffff() [ 30.337108] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ed2c0 dead000000000006 [ 30.338057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ecaf01 [ 30.338967] page dumped because: kasan: bad access detected [ 30.339643] [ 30.339861] Memory state around the buggy address: [ 30.340447] ffff888019eb6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.341323] ffff888019eb6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.342218] >ffff888019eb6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.343085] ^ [ 30.343793] ffff888019eb6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.344662] ffff888019eb6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.345527] ================================================================== [ 30.346574] Disabling lock debugging due to kernel taint [ 32.406606] BUG: Bad rss-counter state mm:000000001a3b0276 type:MM_FILEPAGES val:33 [ 32.407582] BUG: Bad rss-counter state mm:000000001a3b0276 type:MM_ANONPAGES val:22 [ 32.877868] BUG: Bad rss-counter state mm:00000000263709a3 type:MM_FILEPAGES val:33 [ 32.878871] BUG: Bad rss-counter state mm:00000000263709a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7846' (ECDSA) to the list of known hosts. 2023/06/21 05:44:40 fuzzer started 2023/06/21 05:44:40 dialing manager at localhost:36067 2023/06/21 05:44:40 checking machine... 2023/06/21 05:44:40 checking revisions... [ 33.596706] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:44:40 testing simple program... [ 33.644113] cgroup: Unknown subsys name 'net' [ 33.681860] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:44:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff829d1a000 CR3=000000000eabe000 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=2039333a34343a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a34343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000e154fe80 RBX=00000000daacc417 RCX=000000008ff4276e RDX=0000000000000007 RSI=0000000000000002 RDI=000000008f1e5e59 RBP=ffffffff813782f8 RSP=ffff888008e37a48 R8 =0000000023c0916b R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000000128 R12=0000000000000001 R13=0000000000000000 R14=ffff888008e37ab0 R15=0000000000000007 RIP=ffffffff8227056a RFL=00000287 [--S--PC] 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=00007fdd20da6618 CR3=000000001ce26000 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=563412feff00545000000000000080fe 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