syzkaller login: [ 30.063316] BUG: Bad rss-counter state mm:00000000c5bd00b1 type:MM_FILEPAGES val:33 [ 30.064632] BUG: Bad rss-counter state mm:00000000c5bd00b1 type:MM_ANONPAGES val:22 [ 30.248198] ================================================================== [ 30.249138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.250100] Read of size 8 at addr ffff888016df8058 by task sshd/220 [ 30.250989] [ 30.251212] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.252096] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.253113] Call Trace: [ 30.253436] [ 30.253726] dump_stack_lvl+0x91/0xf0 [ 30.254230] print_report+0xcc/0x620 [ 30.254725] ? __virt_addr_valid+0x102/0x340 [ 30.255298] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.255921] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.256554] kasan_report+0xbe/0xf0 [ 30.257043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.257700] vma_interval_tree_remove+0xc75/0xec0 [ 30.258307] vma_prepare+0xc54/0x11a0 [ 30.258783] __split_vma+0x5af/0x950 [ 30.259258] ? __pfx___split_vma+0x10/0x10 [ 30.259796] ? find_held_lock+0x2c/0x110 [ 30.260328] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.260918] ? lock_is_held_type+0x9f/0x120 [ 30.261465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.262073] ? mtree_range_walk+0x632/0x900 [ 30.262634] ? mas_walk+0x5c7/0x7c0 [ 30.263119] do_vmi_munmap+0x1f1/0x2b0 [ 30.263613] mmap_region+0x1f9/0x2660 [ 30.264097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.264617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.265366] ? __pfx_lock_acquire+0x10/0x10 [ 30.265909] ? __pfx_mmap_region+0x10/0x10 [ 30.266450] ? security_mmap_addr+0x7d/0xa0 [ 30.266978] ? get_unmapped_area+0x1f5/0x3f0 [ 30.267534] do_mmap+0x854/0xf00 [ 30.267973] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.268470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.269036] ksys_mmap_pgoff+0x3af/0x500 [ 30.269557] do_syscall_64+0x3f/0x90 [ 30.270035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.270689] RIP: 0033:0x7f302ac85d82 [ 30.271141] 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 [ 30.273278] RSP: 002b:00007ffc68603b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.274182] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f302ac85d82 [ 30.275029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f302a0bf000 [ 30.275872] RBP: 00007f302a0bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.276709] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640e8edcec0 [ 30.277564] R13: 00007ffc68603b70 R14: 00007ffc68603ba0 R15: 00007ffc68603f00 [ 30.278419] [ 30.278713] [ 30.278925] Allocated by task 213: [ 30.279356] kasan_save_stack+0x22/0x50 [ 30.279857] kasan_set_track+0x25/0x30 [ 30.280354] __kasan_slab_alloc+0x59/0x70 [ 30.280881] kmem_cache_alloc+0x16b/0x370 [ 30.281431] vm_area_dup+0x20/0x160 [ 30.281965] __split_vma+0x170/0x950 [ 30.282517] split_vma+0xc6/0x110 [ 30.283034] mprotect_fixup+0x8d2/0xb30 [ 30.283621] do_mprotect_pkey+0x87e/0xd40 [ 30.284222] __x64_sys_mprotect+0x78/0xc0 [ 30.284829] do_syscall_64+0x3f/0x90 [ 30.285409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286162] [ 30.286415] Freed by task 213: [ 30.286880] kasan_save_stack+0x22/0x50 [ 30.287475] kasan_set_track+0x25/0x30 [ 30.288056] kasan_save_free_info+0x2b/0x50 [ 30.288681] __kasan_slab_free+0x10a/0x190 [ 30.289311] kmem_cache_free+0x10d/0x4d0 [ 30.289910] rcu_core+0x8c8/0x2860 [ 30.290428] __do_softirq+0x1b7/0x7d4 [ 30.290992] [ 30.291248] Last potentially related work creation: [ 30.291942] kasan_save_stack+0x22/0x50 [ 30.292538] __kasan_record_aux_stack+0x8e/0xa0 [ 30.293221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.293975] remove_vma+0x139/0x170 [ 30.294505] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.295148] do_vmi_munmap+0x1f1/0x2b0 [ 30.295713] __vm_munmap+0x138/0x3a0 [ 30.296255] __x64_sys_munmap+0x59/0x80 [ 30.296853] do_syscall_64+0x3f/0x90 [ 30.297409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298161] [ 30.298410] The buggy address belongs to the object at ffff888016df8000 [ 30.298410] which belongs to the cache vm_area_struct of size 168 [ 30.300130] The buggy address is located 88 bytes inside of [ 30.300130] freed 168-byte region [ffff888016df8000, ffff888016df80a8) [ 30.301772] [ 30.302026] The buggy address belongs to the physical page: [ 30.302791] page:00000000b8cf190d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16df8 [ 30.304060] memcg:ffff888018191201 [ 30.304556] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.305315] page_type: 0xffffffff() [ 30.305841] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.306906] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018191201 [ 30.307982] page dumped because: kasan: bad access detected [ 30.308784] [ 30.309061] Memory state around the buggy address: [ 30.309775] ffff888016df7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.310811] ffff888016df7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.311839] >ffff888016df8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.312882] ^ [ 30.313751] ffff888016df8080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.314779] ffff888016df8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.315803] ================================================================== [ 30.317165] Disabling lock debugging due to kernel taint [ 32.387210] BUG: Bad rss-counter state mm:0000000004f471f0 type:MM_FILEPAGES val:33 [ 32.388403] BUG: Bad rss-counter state mm:0000000004f471f0 type:MM_ANONPAGES val:22 [ 32.774515] BUG: Bad rss-counter state mm:00000000f3ac5245 type:MM_FILEPAGES val:33 [ 32.775582] BUG: Bad rss-counter state mm:00000000f3ac5245 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21193' (ECDSA) to the list of known hosts. 2023/06/20 20:40:26 fuzzer started 2023/06/20 20:40:26 dialing manager at localhost:36067 2023/06/20 20:40:26 checking machine... 2023/06/20 20:40:26 checking revisions... [ 33.542228] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:40:26 testing simple program... [ 33.588366] cgroup: Unknown subsys name 'net' [ 33.629342] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:40:26 Registers: info registers vcpu 0 RAX=ffffffff815a72a6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff888014397d28 RSP=ffff888014397c58 R8 =0000000000000006 R9 =0000000000000101 R10=000000000000002d R11=0000000000000000 R12=0000000000000015 R13=ffff888014397d60 R14=0000000000000015 R15=ffffc9000068d210 RIP=ffffffff814c0860 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 00007f2c07320900 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=00007f78c23a3650 CR3=000000000d680000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=07b92c645fdccfae00000000000ae988 XMM05=e223bb487636c9070000000000132350 XMM06=4fda316b135da52b0000000000131140 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=000055e1c061e000 CR3=0000000015bf0000 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=2035323a30343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a30343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000