syzkaller login: [ 31.100900] BUG: Bad rss-counter state mm:000000001f015492 type:MM_FILEPAGES val:33 [ 31.102389] BUG: Bad rss-counter state mm:000000001f015492 type:MM_ANONPAGES val:22 [ 31.272999] ================================================================== [ 31.273919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.274877] Read of size 8 at addr ffff88801971e310 by task sshd/219 [ 31.275677] [ 31.275989] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.276925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.277922] Call Trace: [ 31.278240] [ 31.278532] dump_stack_lvl+0x91/0xf0 [ 31.279042] print_report+0xcc/0x620 [ 31.279523] ? __virt_addr_valid+0x102/0x340 [ 31.280071] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280687] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281308] kasan_report+0xbe/0xf0 [ 31.281795] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282424] vma_interval_tree_remove+0xc75/0xec0 [ 31.283080] vma_prepare+0xc54/0x11a0 [ 31.283594] __split_vma+0x5af/0x950 [ 31.284105] ? __pfx___split_vma+0x10/0x10 [ 31.284678] ? find_held_lock+0x2c/0x110 [ 31.285240] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.285841] ? lock_is_held_type+0x9f/0x120 [ 31.286421] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.287092] ? mtree_range_walk+0x632/0x900 [ 31.287685] ? mas_walk+0x5c7/0x7c0 [ 31.288197] do_vmi_munmap+0x1f1/0x2b0 [ 31.288727] mmap_region+0x1f9/0x2660 [ 31.289240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.289793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.290563] ? __pfx_lock_acquire+0x10/0x10 [ 31.291137] ? __pfx_mmap_region+0x10/0x10 [ 31.291696] ? security_mmap_addr+0x7d/0xa0 [ 31.292252] ? get_unmapped_area+0x1f5/0x3f0 [ 31.292825] do_mmap+0x854/0xf00 [ 31.293292] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.293816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.294402] ksys_mmap_pgoff+0x3af/0x500 [ 31.295073] do_syscall_64+0x3f/0x90 [ 31.295580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296262] RIP: 0033:0x7fd4de238d82 [ 31.296747] 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 [ 31.298990] RSP: 002b:00007fffa3c4af88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.299934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4de238d82 [ 31.300833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4dd672000 [ 31.301729] RBP: 00007fd4dd672000 R08: 0000000000000009 R09: 0000000000001000 [ 31.302617] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d363c16d90 [ 31.303515] R13: 00007fffa3c4afa0 R14: 00007fffa3c4afd0 R15: 00007fffa3c4b330 [ 31.304414] [ 31.304726] [ 31.304958] Allocated by task 212: [ 31.305414] kasan_save_stack+0x22/0x50 [ 31.305950] kasan_set_track+0x25/0x30 [ 31.306468] __kasan_slab_alloc+0x59/0x70 [ 31.307044] kmem_cache_alloc+0x16b/0x370 [ 31.307592] vm_area_dup+0x20/0x160 [ 31.308074] __split_vma+0x170/0x950 [ 31.308567] split_vma+0xc6/0x110 [ 31.309024] mprotect_fixup+0x8d2/0xb30 [ 31.309549] do_mprotect_pkey+0x87e/0xd40 [ 31.310098] __x64_sys_mprotect+0x78/0xc0 [ 31.310648] do_syscall_64+0x3f/0x90 [ 31.311152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.311837] [ 31.312062] Freed by task 212: [ 31.312477] kasan_save_stack+0x22/0x50 [ 31.313017] kasan_set_track+0x25/0x30 [ 31.313540] kasan_save_free_info+0x2b/0x50 [ 31.314096] __kasan_slab_free+0x10a/0x190 [ 31.314661] kmem_cache_free+0x10d/0x4d0 [ 31.315205] rcu_core+0x8c8/0x2860 [ 31.315680] __do_softirq+0x1b7/0x7d4 [ 31.316187] [ 31.316415] Last potentially related work creation: [ 31.317033] kasan_save_stack+0x22/0x50 [ 31.317558] __kasan_record_aux_stack+0x8e/0xa0 [ 31.318159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.318838] remove_vma+0x139/0x170 [ 31.319332] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.319912] do_vmi_munmap+0x1f1/0x2b0 [ 31.320425] __vm_munmap+0x138/0x3a0 [ 31.320920] __x64_sys_munmap+0x59/0x80 [ 31.321451] do_syscall_64+0x3f/0x90 [ 31.321945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322633] [ 31.322864] The buggy address belongs to the object at ffff88801971e2b8 [ 31.322864] which belongs to the cache vm_area_struct of size 168 [ 31.324428] The buggy address is located 88 bytes inside of [ 31.324428] freed 168-byte region [ffff88801971e2b8, ffff88801971e360) [ 31.325904] [ 31.326127] The buggy address belongs to the physical page: [ 31.326821] page:0000000007c1e491 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1971e [ 31.327989] memcg:ffff88800b816401 [ 31.328438] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.329171] page_type: 0xffffffff() [ 31.329652] raw: 0100000000000200 ffff8880087a0c80 ffffea00004e7640 dead000000000003 [ 31.330625] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b816401 [ 31.331596] page dumped because: kasan: bad access detected [ 31.332297] [ 31.332522] Memory state around the buggy address: [ 31.333136] ffff88801971e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.334028] ffff88801971e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.334941] >ffff88801971e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.335844] ^ [ 31.336341] ffff88801971e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.337246] ffff88801971e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.338143] ================================================================== [ 31.339410] Disabling lock debugging due to kernel taint [ 33.343145] BUG: Bad rss-counter state mm:0000000005770892 type:MM_FILEPAGES val:33 [ 33.344589] BUG: Bad rss-counter state mm:0000000005770892 type:MM_ANONPAGES val:22 [ 33.858124] BUG: Bad rss-counter state mm:000000001b4b7a76 type:MM_FILEPAGES val:33 [ 33.859582] BUG: Bad rss-counter state mm:000000001b4b7a76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61628' (ECDSA) to the list of known hosts. 2023/06/20 16:09:08 fuzzer started 2023/06/20 16:09:08 dialing manager at localhost:36067 2023/06/20 16:09:08 checking machine... 2023/06/20 16:09:08 checking revisions... [ 34.552301] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:09:08 testing simple program... [ 34.605001] cgroup: Unknown subsys name 'net' [ 34.668356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:09:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100203beea RSI=ffffffff8180803b RDI=ffff8880101df7c0 RBP=ffff8880101df790 RSP=ffff8880101df6e8 R8 =0000000000000001 R9 =ffff8880101df738 R10=0000000000038001 R11=0000000000020de5 R12=ffff8880101df7c0 R13=0000000000000000 R14=ffff888010200000 R15=0000000000000dc0 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007f852db4e900 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=00007f852cf6c810 CR3=000000000d944000 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=d4462334de3fb98300000000000ae988 XMM05=2c12b0a00c7e71120000000000132be8 XMM06=dfcdbad4f1609c370000000000131730 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=00007f9dc22cb618 CR3=00000000102d4000 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=39303a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383334 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000