syzkaller login: [ 30.872406] BUG: Bad rss-counter state mm:00000000440a685e type:MM_FILEPAGES val:33 [ 30.873421] BUG: Bad rss-counter state mm:00000000440a685e type:MM_ANONPAGES val:22 [ 31.026978] ================================================================== [ 31.028237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.029385] Read of size 8 at addr ffff8880159c9a50 by task sshd/220 [ 31.030357] [ 31.030639] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.031660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.032667] Call Trace: [ 31.033004] [ 31.033286] dump_stack_lvl+0x91/0xf0 [ 31.033800] print_report+0xcc/0x620 [ 31.034285] ? __virt_addr_valid+0x102/0x340 [ 31.034866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035497] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036132] kasan_report+0xbe/0xf0 [ 31.036629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037312] vma_interval_tree_remove+0xc75/0xec0 [ 31.037962] vma_prepare+0xc54/0x11a0 [ 31.038490] __split_vma+0x5af/0x950 [ 31.039002] ? __pfx___split_vma+0x10/0x10 [ 31.039564] ? find_held_lock+0x2c/0x110 [ 31.040146] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.040773] ? lock_is_held_type+0x9f/0x120 [ 31.041343] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.042015] ? mtree_range_walk+0x632/0x900 [ 31.042630] ? mas_walk+0x5c7/0x7c0 [ 31.043143] do_vmi_munmap+0x1f1/0x2b0 [ 31.043686] mmap_region+0x1f9/0x2660 [ 31.044192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.044766] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.045526] ? __pfx_lock_acquire+0x10/0x10 [ 31.046110] ? __pfx_mmap_region+0x10/0x10 [ 31.046700] ? security_mmap_addr+0x7d/0xa0 [ 31.047258] ? get_unmapped_area+0x1f5/0x3f0 [ 31.047850] do_mmap+0x854/0xf00 [ 31.048316] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.048884] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.049477] ksys_mmap_pgoff+0x3af/0x500 [ 31.050021] do_syscall_64+0x3f/0x90 [ 31.050546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.051256] RIP: 0033:0x7f6401999d82 [ 31.051767] 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 [ 31.054100] RSP: 002b:00007ffe06f6f6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.055087] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6401999d82 [ 31.056042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6400dd3000 [ 31.056971] RBP: 00007f6400dd3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.057878] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d179f5ec0 [ 31.058814] R13: 00007ffe06f6f700 R14: 00007ffe06f6f730 R15: 00007ffe06f6fa90 [ 31.059734] [ 31.060042] [ 31.060271] Allocated by task 213: [ 31.060748] kasan_save_stack+0x22/0x50 [ 31.061275] kasan_set_track+0x25/0x30 [ 31.061815] __kasan_slab_alloc+0x59/0x70 [ 31.062370] kmem_cache_alloc+0x16b/0x370 [ 31.062932] vm_area_dup+0x20/0x160 [ 31.063419] __split_vma+0x170/0x950 [ 31.063936] split_vma+0xc6/0x110 [ 31.064395] mprotect_fixup+0x8d2/0xb30 [ 31.064964] do_mprotect_pkey+0x87e/0xd40 [ 31.065523] __x64_sys_mprotect+0x78/0xc0 [ 31.066091] do_syscall_64+0x3f/0x90 [ 31.066611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067297] [ 31.067520] Freed by task 213: [ 31.067947] kasan_save_stack+0x22/0x50 [ 31.068472] kasan_set_track+0x25/0x30 [ 31.069016] kasan_save_free_info+0x2b/0x50 [ 31.069667] __kasan_slab_free+0x10a/0x190 [ 31.070234] kmem_cache_free+0x10d/0x4d0 [ 31.070798] rcu_core+0x8c8/0x2860 [ 31.071270] __do_softirq+0x1b7/0x7d4 [ 31.071802] [ 31.072026] Last potentially related work creation: [ 31.072660] kasan_save_stack+0x22/0x50 [ 31.073203] __kasan_record_aux_stack+0x8e/0xa0 [ 31.073822] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.074515] remove_vma+0x139/0x170 [ 31.075007] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.075595] do_vmi_munmap+0x1f1/0x2b0 [ 31.076125] __vm_munmap+0x138/0x3a0 [ 31.076614] __x64_sys_munmap+0x59/0x80 [ 31.077164] do_syscall_64+0x3f/0x90 [ 31.077679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.078369] [ 31.078622] The buggy address belongs to the object at ffff8880159c99f8 [ 31.078622] which belongs to the cache vm_area_struct of size 168 [ 31.080221] The buggy address is located 88 bytes inside of [ 31.080221] freed 168-byte region [ffff8880159c99f8, ffff8880159c9aa0) [ 31.081753] [ 31.081980] The buggy address belongs to the physical page: [ 31.082707] page:00000000009ae8b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159c9 [ 31.083876] memcg:ffff88800d53ac01 [ 31.084323] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.085028] page_type: 0xffffffff() [ 31.085522] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.086478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d53ac01 [ 31.087402] page dumped because: kasan: bad access detected [ 31.088079] [ 31.088294] Memory state around the buggy address: [ 31.088892] ffff8880159c9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.089773] ffff8880159c9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.090655] >ffff8880159c9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.091513] ^ [ 31.092220] ffff8880159c9a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.093097] ffff8880159c9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.093958] ================================================================== [ 31.094901] Disabling lock debugging due to kernel taint [ 33.043059] BUG: Bad rss-counter state mm:00000000bf209d82 type:MM_FILEPAGES val:33 [ 33.043999] BUG: Bad rss-counter state mm:00000000bf209d82 type:MM_ANONPAGES val:22 [ 33.536820] BUG: Bad rss-counter state mm:00000000231f5fd2 type:MM_FILEPAGES val:33 [ 33.537846] BUG: Bad rss-counter state mm:00000000231f5fd2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5092' (ECDSA) to the list of known hosts. 2023/06/21 02:20:37 fuzzer started 2023/06/21 02:20:37 dialing manager at localhost:36067 2023/06/21 02:20:37 checking machine... 2023/06/21 02:20:37 checking revisions... [ 34.295124] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:20:37 testing simple program... [ 34.342354] cgroup: Unknown subsys name 'net' [ 34.381997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:20:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff8880159a0000 RSI=ffffffff836827de RDI=ffff888016c30780 RBP=ffff888016c30780 RSP=ffff8880181ff990 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff83c208fc R13=ffff88800a2ffb40 R14=ffff8880181ffa88 R15=ffff888016c30780 RIP=ffffffff8366b7f2 RFL=00000293 [--S-A-C] 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 00007f1e96e28700 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=000055f7364d2000 CR3=000000000f732000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037333a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363733 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff88801474b680 RSI=00007f46194ab044 RDI=ffff8880165f0000 RBP=ffff8880102c7f58 RSP=ffff8880102c7ed0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=0000000000000007 R13=00007f46194ab044 R14=0000000000000040 R15=ffff8880165f0000 RIP=ffffffff81716814 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4618957900 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=00007f46194ab044 CR3=000000000eaac000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000