syzkaller login: [ 38.714961] BUG: Bad rss-counter state mm:0000000001203a0c type:MM_FILEPAGES val:33 [ 38.716510] BUG: Bad rss-counter state mm:0000000001203a0c type:MM_ANONPAGES val:22 [ 38.879621] ================================================================== [ 38.880753] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881918] Read of size 8 at addr ffff8880146fded8 by task sshd/218 [ 38.882971] [ 38.883197] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.884086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885086] Call Trace: [ 38.885405] [ 38.885698] dump_stack_lvl+0x91/0xf0 [ 38.886195] print_report+0xcc/0x620 [ 38.886688] ? __virt_addr_valid+0x102/0x340 [ 38.887244] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887871] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888501] kasan_report+0xbe/0xf0 [ 38.888982] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889611] vma_interval_tree_remove+0xc75/0xec0 [ 38.890202] vma_prepare+0xc54/0x11a0 [ 38.890727] __split_vma+0x5af/0x950 [ 38.891215] ? __pfx___split_vma+0x10/0x10 [ 38.891766] ? find_held_lock+0x2c/0x110 [ 38.892306] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.892902] ? lock_is_held_type+0x9f/0x120 [ 38.893451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894066] ? mtree_range_walk+0x632/0x900 [ 38.894634] ? mas_walk+0x5c7/0x7c0 [ 38.895119] do_vmi_munmap+0x1f1/0x2b0 [ 38.895634] mmap_region+0x1f9/0x2660 [ 38.896127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897360] ? __pfx_lock_acquire+0x10/0x10 [ 38.897899] ? __pfx_mmap_region+0x10/0x10 [ 38.898424] ? security_mmap_addr+0x7d/0xa0 [ 38.898937] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899493] do_mmap+0x854/0xf00 [ 38.899938] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901017] ksys_mmap_pgoff+0x3af/0x500 [ 38.901500] do_syscall_64+0x3f/0x90 [ 38.901956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902570] RIP: 0033:0x7f2813931d82 [ 38.903008] 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 [ 38.905031] RSP: 002b:00007ffd1ab1dd98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2813931d82 [ 38.906688] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2812d6b000 [ 38.907545] RBP: 00007f2812d6b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.908440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e87b7ed90 [ 38.909290] R13: 00007ffd1ab1ddb0 R14: 00007ffd1ab1dde0 R15: 00007ffd1ab1e140 [ 38.910143] [ 38.910432] [ 38.910651] Allocated by task 211: [ 38.911080] kasan_save_stack+0x22/0x50 [ 38.911584] kasan_set_track+0x25/0x30 [ 38.912076] __kasan_slab_alloc+0x59/0x70 [ 38.912610] kmem_cache_alloc+0x16b/0x370 [ 38.913097] vm_area_dup+0x20/0x160 [ 38.913534] __split_vma+0x170/0x950 [ 38.913995] split_vma+0xc6/0x110 [ 38.914432] mprotect_fixup+0x8d2/0xb30 [ 38.914933] do_mprotect_pkey+0x87e/0xd40 [ 38.915465] __x64_sys_mprotect+0x78/0xc0 [ 38.915989] do_syscall_64+0x3f/0x90 [ 38.916481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917128] [ 38.917346] Freed by task 202: [ 38.917742] kasan_save_stack+0x22/0x50 [ 38.918245] kasan_set_track+0x25/0x30 [ 38.918750] kasan_save_free_info+0x2b/0x50 [ 38.919280] __kasan_slab_free+0x10a/0x190 [ 38.919822] kmem_cache_free+0x10d/0x4d0 [ 38.920355] rcu_core+0x8c8/0x2860 [ 38.920807] __do_softirq+0x1b7/0x7d4 [ 38.921291] [ 38.921511] Last potentially related work creation: [ 38.922102] kasan_save_stack+0x22/0x50 [ 38.922606] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923180] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.923918] remove_vma+0x139/0x170 [ 38.924387] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.924950] do_vmi_munmap+0x1f1/0x2b0 [ 38.925443] __vm_munmap+0x138/0x3a0 [ 38.925907] __x64_sys_munmap+0x59/0x80 [ 38.926408] do_syscall_64+0x3f/0x90 [ 38.926884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927521] [ 38.927737] The buggy address belongs to the object at ffff8880146fde80 [ 38.927737] which belongs to the cache vm_area_struct of size 168 [ 38.929227] The buggy address is located 88 bytes inside of [ 38.929227] freed 168-byte region [ffff8880146fde80, ffff8880146fdf28) [ 38.930651] [ 38.930867] The buggy address belongs to the physical page: [ 38.931532] page:000000000ab0251d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146fd [ 38.932656] memcg:ffff88801817e701 [ 38.933081] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.933738] page_type: 0xffffffff() [ 38.934188] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388700 dead000000000002 [ 38.935108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801817e701 [ 38.936024] page dumped because: kasan: bad access detected [ 38.936706] [ 38.936923] Memory state around the buggy address: [ 38.937495] ffff8880146fdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.938331] ffff8880146fde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.939153] >ffff8880146fde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.940008] ^ [ 38.940762] ffff8880146fdf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.941633] ffff8880146fdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.942490] ================================================================== [ 38.943420] Disabling lock debugging due to kernel taint [ 40.807182] BUG: Bad rss-counter state mm:000000000795b7c3 type:MM_FILEPAGES val:33 [ 40.808000] BUG: Bad rss-counter state mm:000000000795b7c3 type:MM_ANONPAGES val:22 [ 41.407710] BUG: Bad rss-counter state mm:000000005961ba54 type:MM_FILEPAGES val:33 [ 41.408875] BUG: Bad rss-counter state mm:000000005961ba54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60311' (ECDSA) to the list of known hosts. 2023/06/20 11:08:05 fuzzer started 2023/06/20 11:08:06 dialing manager at localhost:36067 2023/06/20 11:08:06 checking machine... 2023/06/20 11:08:06 checking revisions... [ 42.070027] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:08:06 testing simple program... [ 42.116955] cgroup: Unknown subsys name 'net' [ 42.159083] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:08:05 Registers: info registers vcpu 0 RAX=ffffea000059ef80 RBX=ffff8880167be600 RCX=ffffea000059ee01 RDX=ffff8880967be600 RSI=ffff88800e4108c0 RDI=ffff888008fae000 RBP=0000000000000000 RSP=ffff88800ec6fc98 R8 =ffff8880167be600 R9 =0000000000000000 R10=ffffea0000390400 R11=00000000800c000a R12=dffffc0000000000 R13=ffff88800ec6fcd8 R14=0000000000000000 R15=ffff88800e4108c0 RIP=ffffffff81810393 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 00007f36ba0c8900 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=00007ffeac1e4000 CR3=000000000e434000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f6732e84710 CR3=000000000d5e6000 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=2035303a38303a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a38303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000