syzkaller login: [ 38.830496] BUG: Bad rss-counter state mm:0000000093768092 type:MM_FILEPAGES val:33 [ 38.831707] BUG: Bad rss-counter state mm:0000000093768092 type:MM_ANONPAGES val:22 [ 38.873697] ================================================================== [ 38.874850] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.875926] Read of size 8 at addr ffff88800d84ced8 by task sshd/218 [ 38.876840] [ 38.877056] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.877992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.879117] Call Trace: [ 38.879440] [ 38.879731] dump_stack_lvl+0x91/0xf0 [ 38.880226] print_report+0xcc/0x620 [ 38.880718] ? __virt_addr_valid+0x102/0x340 [ 38.881270] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881893] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882523] kasan_report+0xbe/0xf0 [ 38.882997] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883612] vma_interval_tree_remove+0xc75/0xec0 [ 38.884219] vma_prepare+0xc54/0x11a0 [ 38.884701] __split_vma+0x5af/0x950 [ 38.885177] ? __pfx___split_vma+0x10/0x10 [ 38.885725] ? find_held_lock+0x2c/0x110 [ 38.886248] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.886810] ? lock_is_held_type+0x9f/0x120 [ 38.887349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.887947] ? mtree_range_walk+0x632/0x900 [ 38.888493] ? mas_walk+0x5c7/0x7c0 [ 38.888977] do_vmi_munmap+0x1f1/0x2b0 [ 38.889474] mmap_region+0x1f9/0x2660 [ 38.889959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.890461] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.891185] ? __pfx_lock_acquire+0x10/0x10 [ 38.891708] ? __pfx_mmap_region+0x10/0x10 [ 38.892239] ? security_mmap_addr+0x7d/0xa0 [ 38.892763] ? get_unmapped_area+0x1f5/0x3f0 [ 38.893309] do_mmap+0x854/0xf00 [ 38.893767] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.894264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.894826] ksys_mmap_pgoff+0x3af/0x500 [ 38.895336] do_syscall_64+0x3f/0x90 [ 38.895812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896471] RIP: 0033:0x7f28214a9d82 [ 38.896929] 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 [ 38.899057] RSP: 002b:00007ffefa8674e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.899970] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28214a9d82 [ 38.900826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28208e3000 [ 38.901677] RBP: 00007f28208e3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.902522] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563248a33ec0 [ 38.903361] R13: 00007ffefa867500 R14: 00007ffefa867530 R15: 00007ffefa867890 [ 38.904216] [ 38.904507] [ 38.904723] Allocated by task 211: [ 38.905155] kasan_save_stack+0x22/0x50 [ 38.905681] kasan_set_track+0x25/0x30 [ 38.906173] __kasan_slab_alloc+0x59/0x70 [ 38.906696] kmem_cache_alloc+0x16b/0x370 [ 38.907217] vm_area_dup+0x20/0x160 [ 38.907667] __split_vma+0x170/0x950 [ 38.908133] split_vma+0xc6/0x110 [ 38.908570] mprotect_fixup+0x8d2/0xb30 [ 38.909067] do_mprotect_pkey+0x87e/0xd40 [ 38.909588] __x64_sys_mprotect+0x78/0xc0 [ 38.910108] do_syscall_64+0x3f/0x90 [ 38.910575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911219] [ 38.911431] Freed by task 211: [ 38.911822] kasan_save_stack+0x22/0x50 [ 38.912322] kasan_set_track+0x25/0x30 [ 38.912812] kasan_save_free_info+0x2b/0x50 [ 38.913337] __kasan_slab_free+0x10a/0x190 [ 38.913889] kmem_cache_free+0x10d/0x4d0 [ 38.914481] rcu_core+0x8c8/0x2860 [ 38.914921] __do_softirq+0x1b7/0x7d4 [ 38.915398] [ 38.915614] Last potentially related work creation: [ 38.916203] kasan_save_stack+0x22/0x50 [ 38.916709] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.917932] remove_vma+0x139/0x170 [ 38.918384] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.918936] do_vmi_munmap+0x1f1/0x2b0 [ 38.919420] __vm_munmap+0x138/0x3a0 [ 38.919931] __x64_sys_munmap+0x59/0x80 [ 38.920455] do_syscall_64+0x3f/0x90 [ 38.920929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921578] [ 38.921791] The buggy address belongs to the object at ffff88800d84ce80 [ 38.921791] which belongs to the cache vm_area_struct of size 168 [ 38.923249] The buggy address is located 88 bytes inside of [ 38.923249] freed 168-byte region [ffff88800d84ce80, ffff88800d84cf28) [ 38.924636] [ 38.924851] The buggy address belongs to the physical page: [ 38.925528] page:000000007ee80083 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd84c [ 38.926605] memcg:ffff88800cf0e001 [ 38.927041] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.927737] page_type: 0xffffffff() [ 38.928187] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c6c0 dead000000000003 [ 38.929102] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf0e001 [ 38.930052] page dumped because: kasan: bad access detected [ 38.930733] [ 38.930957] Memory state around the buggy address: [ 38.931560] ffff88800d84cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.932457] ffff88800d84ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.933368] >ffff88800d84ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.934259] ^ [ 38.935022] ffff88800d84cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.935916] ffff88800d84cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.936817] ================================================================== [ 38.937872] Disabling lock debugging due to kernel taint [ 40.885109] BUG: Bad rss-counter state mm:0000000066bdf25a type:MM_FILEPAGES val:33 [ 40.886298] BUG: Bad rss-counter state mm:0000000066bdf25a type:MM_ANONPAGES val:22 [ 41.266127] BUG: Bad rss-counter state mm:00000000934b6928 type:MM_FILEPAGES val:33 [ 41.267349] BUG: Bad rss-counter state mm:00000000934b6928 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20688' (ECDSA) to the list of known hosts. 2023/06/21 06:45:16 fuzzer started 2023/06/21 06:45:17 dialing manager at localhost:36067 2023/06/21 06:45:17 checking machine... 2023/06/21 06:45:17 checking revisions... [ 41.972568] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:45:17 testing simple program... [ 42.023693] cgroup: Unknown subsys name 'net' [ 42.075234] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:45:16 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=00007f8884cd4460 CR3=000000000c546000 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=00000000000000000000000000000000 XMM01=e0216f67b0eb439e5d40ebc7c1f7aa43 XMM02=000000000011b060ec2efd57dc4c00df XMM03=0000000000121a0044f6de73e61f2833 XMM04=3afa5e3eeab78f8a00000000000ae988 XMM05=751b9502027dc0b90000000000131620 XMM06=2f5d6f2f8dfa7dbb0000000000130b00 XMM07=e042d86d42eb936e0000000000121c80 XMM08=44f6de73e61f2833000000000011b0c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=1ffff110033acd84 RDX=1ffff110033acd91 RSI=0000000000000004 RDI=ffff888019d66c90 RBP=0000000000000280 RSP=ffff888018e6fa38 R8 =0000000000000001 R9 =ffffed10033acd8e R10=ffff888019d66c73 R11=00000000000b6a61 R12=ffff888018fe8f00 R13=0000000000000000 R14=ffff888019d66c28 R15=ffff888019d66be0 RIP=ffffffff81847455 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 00007f20635af900 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=00007ffca1094000 CR3=0000000016c5c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000