syzkaller login: [ 33.827712] BUG: Bad rss-counter state mm:0000000076ae0354 type:MM_FILEPAGES val:33 [ 33.829015] BUG: Bad rss-counter state mm:0000000076ae0354 type:MM_ANONPAGES val:22 [ 33.867846] ================================================================== [ 33.868829] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.869888] Read of size 8 at addr ffff88800ef0bd08 by task sshd/220 [ 33.870696] [ 33.870919] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.871843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.872873] Call Trace: [ 33.873205] [ 33.873502] dump_stack_lvl+0x91/0xf0 [ 33.874022] print_report+0xcc/0x620 [ 33.874524] ? __virt_addr_valid+0x102/0x340 [ 33.875102] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.875772] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.876418] kasan_report+0xbe/0xf0 [ 33.876914] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.877575] vma_interval_tree_remove+0xc75/0xec0 [ 33.878216] vma_prepare+0xc54/0x11a0 [ 33.878715] __split_vma+0x5af/0x950 [ 33.879214] ? __pfx___split_vma+0x10/0x10 [ 33.879787] ? find_held_lock+0x2c/0x110 [ 33.880338] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.880932] ? lock_is_held_type+0x9f/0x120 [ 33.881501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.882138] ? mtree_range_walk+0x632/0x900 [ 33.882718] ? mas_walk+0x5c7/0x7c0 [ 33.883216] do_vmi_munmap+0x1f1/0x2b0 [ 33.883754] mmap_region+0x1f9/0x2660 [ 33.884268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.884800] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.885549] ? __pfx_lock_acquire+0x10/0x10 [ 33.886106] ? __pfx_mmap_region+0x10/0x10 [ 33.886665] ? security_mmap_addr+0x7d/0xa0 [ 33.887224] ? get_unmapped_area+0x1f5/0x3f0 [ 33.887810] do_mmap+0x854/0xf00 [ 33.888271] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.888788] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.889381] ksys_mmap_pgoff+0x3af/0x500 [ 33.889921] do_syscall_64+0x3f/0x90 [ 33.890420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.891102] RIP: 0033:0x7fa285524d82 [ 33.891594] 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 [ 33.893851] RSP: 002b:00007ffda7a05c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.894806] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa285524d82 [ 33.895716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa28495e000 [ 33.896607] RBP: 00007fa28495e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.897490] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f908163ec0 [ 33.898377] R13: 00007ffda7a05cb0 R14: 00007ffda7a05ce0 R15: 00007ffda7a06040 [ 33.899283] [ 33.899599] [ 33.899826] Allocated by task 213: [ 33.900273] kasan_save_stack+0x22/0x50 [ 33.900804] kasan_set_track+0x25/0x30 [ 33.901323] __kasan_slab_alloc+0x59/0x70 [ 33.901867] kmem_cache_alloc+0x16b/0x370 [ 33.902406] vm_area_dup+0x20/0x160 [ 33.902884] __split_vma+0x170/0x950 [ 33.903386] split_vma+0xc6/0x110 [ 33.903851] mprotect_fixup+0x8d2/0xb30 [ 33.904376] do_mprotect_pkey+0x87e/0xd40 [ 33.904920] __x64_sys_mprotect+0x78/0xc0 [ 33.905465] do_syscall_64+0x3f/0x90 [ 33.905964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.906631] [ 33.906860] Freed by task 213: [ 33.907271] kasan_save_stack+0x22/0x50 [ 33.907810] kasan_set_track+0x25/0x30 [ 33.908329] kasan_save_free_info+0x2b/0x50 [ 33.908887] __kasan_slab_free+0x10a/0x190 [ 33.909449] kmem_cache_free+0x10d/0x4d0 [ 33.909990] rcu_core+0x8c8/0x2860 [ 33.910470] __do_softirq+0x1b7/0x7d4 [ 33.910975] [ 33.911207] Last potentially related work creation: [ 33.911838] kasan_save_stack+0x22/0x50 [ 33.912368] __kasan_record_aux_stack+0x8e/0xa0 [ 33.912979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.913658] remove_vma+0x139/0x170 [ 33.914136] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.914729] do_vmi_munmap+0x1f1/0x2b0 [ 33.915244] __vm_munmap+0x138/0x3a0 [ 33.915762] __x64_sys_munmap+0x59/0x80 [ 33.916287] do_syscall_64+0x3f/0x90 [ 33.916779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.917465] [ 33.917689] The buggy address belongs to the object at ffff88800ef0bcb0 [ 33.917689] which belongs to the cache vm_area_struct of size 168 [ 33.919250] The buggy address is located 88 bytes inside of [ 33.919250] freed 168-byte region [ffff88800ef0bcb0, ffff88800ef0bd58) [ 33.920787] [ 33.921022] The buggy address belongs to the physical page: [ 33.921725] page:000000004ab7c90d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef0b [ 33.922882] memcg:ffff88800d9c9e01 [ 33.923336] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.924060] page_type: 0xffffffff() [ 33.924552] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.925524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9c9e01 [ 33.926491] page dumped because: kasan: bad access detected [ 33.927197] [ 33.927426] Memory state around the buggy address: [ 33.928043] ffff88800ef0bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.928965] ffff88800ef0bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.929885] >ffff88800ef0bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.930789] ^ [ 33.931291] ffff88800ef0bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.932237] ffff88800ef0be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.933171] ================================================================== [ 33.934394] Disabling lock debugging due to kernel taint [ 35.987798] BUG: Bad rss-counter state mm:0000000076b0936c type:MM_FILEPAGES val:33 [ 35.988789] BUG: Bad rss-counter state mm:0000000076b0936c type:MM_ANONPAGES val:22 [ 36.480221] BUG: Bad rss-counter state mm:0000000020c26014 type:MM_FILEPAGES val:33 [ 36.481859] BUG: Bad rss-counter state mm:0000000020c26014 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26497' (ECDSA) to the list of known hosts. 2023/06/19 21:54:57 fuzzer started 2023/06/19 21:54:57 dialing manager at localhost:44161 2023/06/19 21:54:57 checking machine... 2023/06/19 21:54:57 checking revisions... [ 37.222964] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:54:57 testing simple program... [ 37.276713] cgroup: Unknown subsys name 'net' [ 37.341430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:54 Registers: info registers vcpu 0 RAX=1ffffffff0bb783f RBX=ffffffff85dbc1f8 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88806ce099e0 R8 =ffffffff860d68c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f6edf1a8900 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=00007ffcb2e2e000 CR3=000000000dbbe000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fad823bb020 CR3=000000000f0bc000 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=2037353a34353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000