syzkaller login: [ 38.709727] BUG: Bad rss-counter state mm:00000000a964622c type:MM_FILEPAGES val:33 [ 38.711369] BUG: Bad rss-counter state mm:00000000a964622c type:MM_ANONPAGES val:22 [ 38.882375] ================================================================== [ 38.883366] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.884242] Read of size 8 at addr ffff88800efa83f8 by task sshd/220 [ 38.884966] [ 38.885247] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.886069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.886987] Call Trace: [ 38.887308] [ 38.887578] dump_stack_lvl+0x91/0xf0 [ 38.888043] print_report+0xcc/0x620 [ 38.888504] ? __virt_addr_valid+0x102/0x340 [ 38.889024] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889604] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890191] kasan_report+0xbe/0xf0 [ 38.890643] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891221] vma_interval_tree_remove+0xc75/0xec0 [ 38.891787] vma_prepare+0xc54/0x11a0 [ 38.892247] __split_vma+0x5af/0x950 [ 38.892720] ? __pfx___split_vma+0x10/0x10 [ 38.893236] ? find_held_lock+0x2c/0x110 [ 38.893752] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.894345] ? lock_is_held_type+0x9f/0x120 [ 38.894886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.895495] ? mtree_range_walk+0x632/0x900 [ 38.896050] ? mas_walk+0x5c7/0x7c0 [ 38.896519] do_vmi_munmap+0x1f1/0x2b0 [ 38.897014] mmap_region+0x1f9/0x2660 [ 38.897489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.897996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.898710] ? __pfx_lock_acquire+0x10/0x10 [ 38.899239] ? __pfx_mmap_region+0x10/0x10 [ 38.899768] ? security_mmap_addr+0x7d/0xa0 [ 38.900281] ? get_unmapped_area+0x1f5/0x3f0 [ 38.900800] do_mmap+0x854/0xf00 [ 38.901219] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.901695] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.902240] ksys_mmap_pgoff+0x3af/0x500 [ 38.902720] do_syscall_64+0x3f/0x90 [ 38.903171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903793] RIP: 0033:0x7fa4d8071d82 [ 38.904221] 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 [ 38.906230] RSP: 002b:00007ffdc3693ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.907082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4d8071d82 [ 38.908074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4d74ab000 [ 38.908928] RBP: 00007fa4d74ab000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909782] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f462abf70 [ 38.910629] R13: 00007ffdc3693cc0 R14: 00007ffdc3693cf0 R15: 00007ffdc3694050 [ 38.911474] [ 38.911765] [ 38.911978] Allocated by task 213: [ 38.912403] kasan_save_stack+0x22/0x50 [ 38.912903] kasan_set_track+0x25/0x30 [ 38.913380] __kasan_slab_alloc+0x59/0x70 [ 38.913880] kmem_cache_alloc+0x16b/0x370 [ 38.914371] vm_area_dup+0x20/0x160 [ 38.914804] __split_vma+0x170/0x950 [ 38.915249] split_vma+0xc6/0x110 [ 38.915668] mprotect_fixup+0x8d2/0xb30 [ 38.916143] do_mprotect_pkey+0x87e/0xd40 [ 38.916641] __x64_sys_mprotect+0x78/0xc0 [ 38.917133] do_syscall_64+0x3f/0x90 [ 38.917584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918209] [ 38.918414] Freed by task 213: [ 38.918784] kasan_save_stack+0x22/0x50 [ 38.919257] kasan_set_track+0x25/0x30 [ 38.919725] kasan_save_free_info+0x2b/0x50 [ 38.920232] __kasan_slab_free+0x10a/0x190 [ 38.920737] kmem_cache_free+0x10d/0x4d0 [ 38.921218] rcu_core+0x8c8/0x2860 [ 38.921637] __do_softirq+0x1b7/0x7d4 [ 38.922094] [ 38.922314] Last potentially related work creation: [ 38.922913] kasan_save_stack+0x22/0x50 [ 38.923414] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924650] remove_vma+0x139/0x170 [ 38.925098] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925654] do_vmi_munmap+0x1f1/0x2b0 [ 38.926157] __vm_munmap+0x138/0x3a0 [ 38.926634] __x64_sys_munmap+0x59/0x80 [ 38.927121] do_syscall_64+0x3f/0x90 [ 38.927583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928224] [ 38.928442] Second to last potentially related work creation: [ 38.929127] kasan_save_stack+0x22/0x50 [ 38.929637] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.930872] remove_vma+0x139/0x170 [ 38.931322] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.931871] do_vmi_munmap+0x1f1/0x2b0 [ 38.932355] mmap_region+0x1f9/0x2660 [ 38.932826] do_mmap+0x854/0xf00 [ 38.933249] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.933736] ksys_mmap_pgoff+0x7d/0x500 [ 38.934224] do_syscall_64+0x3f/0x90 [ 38.934697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935324] [ 38.935540] The buggy address belongs to the object at ffff88800efa83a0 [ 38.935540] which belongs to the cache vm_area_struct of size 168 [ 38.937015] The buggy address is located 88 bytes inside of [ 38.937015] freed 168-byte region [ffff88800efa83a0, ffff88800efa8448) [ 38.938429] [ 38.938647] The buggy address belongs to the physical page: [ 38.939304] page:000000000e033178 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefa8 [ 38.940385] memcg:ffff88800b844a01 [ 38.940814] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941460] page_type: 0xffffffff() [ 38.941911] raw: 0100000000000200 ffff8880087a0c80 ffffea000067fac0 dead000000000006 [ 38.942842] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b844a01 [ 38.943743] page dumped because: kasan: bad access detected [ 38.944411] [ 38.944629] Memory state around the buggy address: [ 38.945217] ffff88800efa8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.946079] ffff88800efa8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.946922] >ffff88800efa8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.947782] ^ [ 38.948630] ffff88800efa8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.949488] ffff88800efa8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.950360] ================================================================== [ 38.951354] Disabling lock debugging due to kernel taint [ 40.772752] BUG: Bad rss-counter state mm:0000000052a651de type:MM_FILEPAGES val:33 [ 40.773466] BUG: Bad rss-counter state mm:0000000052a651de type:MM_ANONPAGES val:22 [ 41.272906] BUG: Bad rss-counter state mm:0000000063a03c61 type:MM_FILEPAGES val:33 [ 41.274214] BUG: Bad rss-counter state mm:0000000063a03c61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56017' (ECDSA) to the list of known hosts. 2023/06/21 05:59:33 fuzzer started 2023/06/21 05:59:33 dialing manager at localhost:36067 2023/06/21 05:59:33 checking machine... 2023/06/21 05:59:33 checking revisions... [ 41.935339] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:59:34 testing simple program... [ 41.993242] cgroup: Unknown subsys name 'net' [ 42.032402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:59:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81efcf34 RDX=ffff8880194fb680 RSI=0000000000000002 RDI=0000000000000000 RBP=0000000000000001 RSP=ffff88800f5cf738 R8 =0000000000000000 R9 =ffff88800f5cf7c0 R10=ffff88800d192d00 R11=0000000000000001 R12=0000000000000002 R13=000000000000000a R14=0000000000000020 R15=ffff88800f5cf7c0 RIP=ffffffff814c0408 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 00007f1a2f1da900 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=00007f1a2f78f650 CR3=000000000ed2a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 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=00007f645832c7e0 CR3=000000000f16a000 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=249f6db3e70dd686ba43635a1ee6bfad XMM02=000000000011a938ec2efd57dc4c00df XMM03=00000000001212f858133a5400176d1b XMM04=f08354b64c0ee55e00000000000ae988 XMM05=c203deca826baeb800000000001329b8 XMM06=4fda316b135da52b0000000000132128 XMM07=e042d86d42eb936e0000000000121578 XMM08=58133a5400176d1b000000000011a998 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000