syzkaller login: [ 27.080640] BUG: Bad rss-counter state mm:00000000599e3113 type:MM_FILEPAGES val:33 [ 27.082677] BUG: Bad rss-counter state mm:00000000599e3113 type:MM_ANONPAGES val:22 [ 27.249979] ================================================================== [ 27.251390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.252819] Read of size 8 at addr ffff88800c763058 by task sshd/220 [ 27.253866] [ 27.254160] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.255108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.256097] Call Trace: [ 27.256445] [ 27.256736] dump_stack_lvl+0x91/0xf0 [ 27.257230] print_report+0xcc/0x620 [ 27.257714] ? __virt_addr_valid+0x102/0x340 [ 27.258297] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.258921] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.259540] kasan_report+0xbe/0xf0 [ 27.260016] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.260671] vma_interval_tree_remove+0xc75/0xec0 [ 27.261276] vma_prepare+0xc54/0x11a0 [ 27.261756] __split_vma+0x5af/0x950 [ 27.262240] ? __pfx___split_vma+0x10/0x10 [ 27.262771] ? find_held_lock+0x2c/0x110 [ 27.263291] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.263869] ? lock_is_held_type+0x9f/0x120 [ 27.264423] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.265031] ? mtree_range_walk+0x632/0x900 [ 27.265594] ? mas_walk+0x5c7/0x7c0 [ 27.266071] do_vmi_munmap+0x1f1/0x2b0 [ 27.266564] mmap_region+0x1f9/0x2660 [ 27.267049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.267560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.268271] ? __pfx_lock_acquire+0x10/0x10 [ 27.268845] ? __pfx_mmap_region+0x10/0x10 [ 27.269401] ? security_mmap_addr+0x7d/0xa0 [ 27.269940] ? get_unmapped_area+0x1f5/0x3f0 [ 27.270495] do_mmap+0x854/0xf00 [ 27.270938] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.271448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.272018] ksys_mmap_pgoff+0x3af/0x500 [ 27.272553] do_syscall_64+0x3f/0x90 [ 27.273038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.273692] RIP: 0033:0x7f006b8e5d82 [ 27.274155] 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 [ 27.276300] RSP: 002b:00007ffc529d6338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.277220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f006b8e5d82 [ 27.278081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f006ad1f000 [ 27.278929] RBP: 00007f006ad1f000 R08: 0000000000000009 R09: 0000000000001000 [ 27.279777] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fa2e14ec0 [ 27.280652] R13: 00007ffc529d6350 R14: 00007ffc529d6380 R15: 00007ffc529d66e0 [ 27.281516] [ 27.281810] [ 27.282026] Allocated by task 213: [ 27.282458] kasan_save_stack+0x22/0x50 [ 27.282964] kasan_set_track+0x25/0x30 [ 27.283452] __kasan_slab_alloc+0x59/0x70 [ 27.283991] kmem_cache_alloc+0x16b/0x370 [ 27.284546] vm_area_dup+0x20/0x160 [ 27.285012] __split_vma+0x170/0x950 [ 27.285499] split_vma+0xc6/0x110 [ 27.285938] mprotect_fixup+0x8d2/0xb30 [ 27.286452] do_mprotect_pkey+0x87e/0xd40 [ 27.286987] __x64_sys_mprotect+0x78/0xc0 [ 27.287514] do_syscall_64+0x3f/0x90 [ 27.288000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.288671] [ 27.288888] Freed by task 213: [ 27.289280] kasan_save_stack+0x22/0x50 [ 27.289786] kasan_set_track+0x25/0x30 [ 27.290290] kasan_save_free_info+0x2b/0x50 [ 27.290847] __kasan_slab_free+0x10a/0x190 [ 27.291395] kmem_cache_free+0x10d/0x4d0 [ 27.291938] rcu_core+0x8c8/0x2860 [ 27.292415] __do_softirq+0x1b7/0x7d4 [ 27.292915] [ 27.293130] Last potentially related work creation: [ 27.293717] kasan_save_stack+0x22/0x50 [ 27.294218] __kasan_record_aux_stack+0x8e/0xa0 [ 27.294785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.295430] remove_vma+0x139/0x170 [ 27.295883] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.296444] do_vmi_munmap+0x1f1/0x2b0 [ 27.296929] __vm_munmap+0x138/0x3a0 [ 27.297396] __x64_sys_munmap+0x59/0x80 [ 27.297894] do_syscall_64+0x3f/0x90 [ 27.298374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.299016] [ 27.299238] The buggy address belongs to the object at ffff88800c763000 [ 27.299238] which belongs to the cache vm_area_struct of size 168 [ 27.300722] The buggy address is located 88 bytes inside of [ 27.300722] freed 168-byte region [ffff88800c763000, ffff88800c7630a8) [ 27.302160] [ 27.302379] The buggy address belongs to the physical page: [ 27.303039] page:00000000132a637d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc763 [ 27.304122] memcg:ffff888019692d01 [ 27.304575] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.305294] page_type: 0xffffffff() [ 27.305766] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 27.306703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019692d01 [ 27.307646] page dumped because: kasan: bad access detected [ 27.308362] [ 27.308582] Memory state around the buggy address: [ 27.309174] ffff88800c762f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 27.310046] ffff88800c762f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.310920] >ffff88800c763000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.311810] ^ [ 27.312579] ffff88800c763080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 27.313483] ffff88800c763100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.314382] ================================================================== [ 27.315567] Disabling lock debugging due to kernel taint [ 29.360006] BUG: Bad rss-counter state mm:00000000460885a7 type:MM_FILEPAGES val:33 [ 29.361339] BUG: Bad rss-counter state mm:00000000460885a7 type:MM_ANONPAGES val:22 [ 29.730757] BUG: Bad rss-counter state mm:00000000817b9b1b type:MM_FILEPAGES val:33 [ 29.731753] BUG: Bad rss-counter state mm:00000000817b9b1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43729' (ECDSA) to the list of known hosts. 2023/06/19 23:25:28 fuzzer started 2023/06/19 23:25:28 dialing manager at localhost:44161 2023/06/19 23:25:28 checking machine... 2023/06/19 23:25:28 checking revisions... [ 30.546819] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:25:28 testing simple program... [ 30.607015] cgroup: Unknown subsys name 'net' [ 30.664100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:25:24 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84530713 RBP=ffffffff85ba4c00 RSP=ffff88800d8ffc88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000004 R13=0000000000000001 R14=ffff88801972e6b8 R15=ffff88801972e000 RIP=ffffffff8453071b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9993863900 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=00007f9993e1a618 CR3=000000000e972000 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=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 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=00007fa1a7eede10 CR3=0000000013a68000 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=66a5f4c51161c1b9f84e35abbd739616 XMM02=ec2efd57dc4c00df000000000011dd80 XMM03=272c695833e11255000000000011de50 XMM04=01b731a32ed9841e00000000000ae988 XMM05=99374e086dfdf7030000000000134da8 XMM06=4fda316b135da52b0000000000133ad8 XMM07=e042d86d42eb936e0000000000124358 XMM08=272c695833e11255000000000011de50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000