syzkaller login: [ 31.837237] BUG: Bad rss-counter state mm:000000001a7acf22 type:MM_FILEPAGES val:33 [ 31.838451] BUG: Bad rss-counter state mm:000000001a7acf22 type:MM_ANONPAGES val:22 [ 31.877846] ================================================================== [ 31.878972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.880079] Read of size 8 at addr ffff88800c707ed8 by task sshd/220 [ 31.881034] [ 31.881303] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.882321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.883498] Call Trace: [ 31.883878] [ 31.884215] dump_stack_lvl+0x91/0xf0 [ 31.884803] print_report+0xcc/0x620 [ 31.885381] ? __virt_addr_valid+0x102/0x340 [ 31.886077] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.886742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.887518] kasan_report+0xbe/0xf0 [ 31.888039] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.888705] vma_interval_tree_remove+0xc75/0xec0 [ 31.889350] vma_prepare+0xc54/0x11a0 [ 31.889882] __split_vma+0x5af/0x950 [ 31.890386] ? __pfx___split_vma+0x10/0x10 [ 31.890957] ? find_held_lock+0x2c/0x110 [ 31.891519] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.892126] ? lock_is_held_type+0x9f/0x120 [ 31.892712] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.893373] ? mtree_range_walk+0x632/0x900 [ 31.893972] ? mas_walk+0x5c7/0x7c0 [ 31.894478] do_vmi_munmap+0x1f1/0x2b0 [ 31.895005] mmap_region+0x1f9/0x2660 [ 31.895524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.896069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.896834] ? __pfx_lock_acquire+0x10/0x10 [ 31.897413] ? __pfx_mmap_region+0x10/0x10 [ 31.897995] ? security_mmap_addr+0x7d/0xa0 [ 31.898569] ? get_unmapped_area+0x1f5/0x3f0 [ 31.899167] do_mmap+0x854/0xf00 [ 31.899645] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.900177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.900786] ksys_mmap_pgoff+0x3af/0x500 [ 31.901334] do_syscall_64+0x3f/0x90 [ 31.901860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902558] RIP: 0033:0x7f374fcd2d82 [ 31.903050] 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 [ 31.905365] RSP: 002b:00007fffe7751d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.906346] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f374fcd2d82 [ 31.907263] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f374f10c000 [ 31.908188] RBP: 00007f374f10c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.909114] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d3f429ec0 [ 31.910052] R13: 00007fffe7751d60 R14: 00007fffe7751d90 R15: 00007fffe77520f0 [ 31.910991] [ 31.911308] [ 31.911539] Allocated by task 213: [ 31.912008] kasan_save_stack+0x22/0x50 [ 31.912554] kasan_set_track+0x25/0x30 [ 31.913095] __kasan_slab_alloc+0x59/0x70 [ 31.913667] kmem_cache_alloc+0x16b/0x370 [ 31.914232] vm_area_dup+0x20/0x160 [ 31.914722] __split_vma+0x170/0x950 [ 31.915229] split_vma+0xc6/0x110 [ 31.915707] mprotect_fixup+0x8d2/0xb30 [ 31.916247] do_mprotect_pkey+0x87e/0xd40 [ 31.916810] __x64_sys_mprotect+0x78/0xc0 [ 31.917374] do_syscall_64+0x3f/0x90 [ 31.917899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.918592] [ 31.918821] Freed by task 13: [ 31.919230] kasan_save_stack+0x22/0x50 [ 31.919772] kasan_set_track+0x25/0x30 [ 31.920304] kasan_save_free_info+0x2b/0x50 [ 31.920882] __kasan_slab_free+0x10a/0x190 [ 31.921463] kmem_cache_free+0x10d/0x4d0 [ 31.922014] rcu_core+0x8c8/0x2860 [ 31.922535] __do_softirq+0x1b7/0x7d4 [ 31.923053] [ 31.923281] Last potentially related work creation: [ 31.923905] kasan_save_stack+0x22/0x50 [ 31.924454] __kasan_record_aux_stack+0x8e/0xa0 [ 31.925075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.925787] remove_vma+0x139/0x170 [ 31.926284] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.926898] do_vmi_munmap+0x1f1/0x2b0 [ 31.927421] __vm_munmap+0x138/0x3a0 [ 31.927920] __x64_sys_munmap+0x59/0x80 [ 31.928456] do_syscall_64+0x3f/0x90 [ 31.928966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.929682] [ 31.929916] The buggy address belongs to the object at ffff88800c707e80 [ 31.929916] which belongs to the cache vm_area_struct of size 168 [ 31.931523] The buggy address is located 88 bytes inside of [ 31.931523] freed 168-byte region [ffff88800c707e80, ffff88800c707f28) [ 31.933047] [ 31.933282] The buggy address belongs to the physical page: [ 31.933991] page:00000000e3964cc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc707 [ 31.935171] memcg:ffff88800f94d601 [ 31.935637] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.936329] page_type: 0xffffffff() [ 31.936818] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.937839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f94d601 [ 31.938818] page dumped because: kasan: bad access detected [ 31.939531] [ 31.939762] Memory state around the buggy address: [ 31.940381] ffff88800c707d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.941295] ffff88800c707e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.942222] >ffff88800c707e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.943144] ^ [ 31.943929] ffff88800c707f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.944859] ffff88800c707f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.945795] ================================================================== [ 31.946890] Disabling lock debugging due to kernel taint [ 34.027383] BUG: Bad rss-counter state mm:0000000042fe71ff type:MM_FILEPAGES val:33 [ 34.028149] BUG: Bad rss-counter state mm:0000000042fe71ff type:MM_ANONPAGES val:22 [ 34.429947] BUG: Bad rss-counter state mm:00000000c4c55582 type:MM_FILEPAGES val:33 [ 34.430732] BUG: Bad rss-counter state mm:00000000c4c55582 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42595' (ECDSA) to the list of known hosts. 2023/06/20 05:54:23 fuzzer started 2023/06/20 05:54:23 dialing manager at localhost:44161 2023/06/20 05:54:23 checking machine... 2023/06/20 05:54:23 checking revisions... [ 35.167435] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:54:24 testing simple program... [ 35.225005] cgroup: Unknown subsys name 'net' [ 35.279337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:54:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa87dbd9070 CR3=000000000f07a000 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=2033323a34353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a34353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000000000c RCX=ffffffff8184ccf5 RDX=ffff888018c3fbc3 RSI=ffff888018c3fbb8 RDI=0000000000000006 RBP=ffff888018c3fbc4 RSP=ffff888018c3fac8 R8 =0000000000000006 R9 =ffff888018c3fbb8 R10=ffff888018c3fbc3 R11=0000093b0000093b R12=ffff888018c3fbb8 R13=0000000000000001 R14=ffff888018c3fbc3 R15=00007ffddfc71134 RIP=ffffffff814c01d0 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 00007fa8c745a900 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=000055f6b9cff954 CR3=000000000f19c000 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