syzkaller login: [ 30.212048] BUG: Bad rss-counter state mm:00000000ff338e42 type:MM_FILEPAGES val:33 [ 30.213441] BUG: Bad rss-counter state mm:00000000ff338e42 type:MM_ANONPAGES val:22 [ 30.257190] ================================================================== [ 30.258092] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.259048] Read of size 8 at addr ffff88800fd21a50 by task sshd/220 [ 30.259978] [ 30.260199] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.261069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.262079] Call Trace: [ 30.262402] [ 30.262703] dump_stack_lvl+0x91/0xf0 [ 30.263202] print_report+0xcc/0x620 [ 30.263687] ? __virt_addr_valid+0x102/0x340 [ 30.264244] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.264859] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.265472] kasan_report+0xbe/0xf0 [ 30.265945] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.266585] vma_interval_tree_remove+0xc75/0xec0 [ 30.267196] vma_prepare+0xc54/0x11a0 [ 30.267680] __split_vma+0x5af/0x950 [ 30.268156] ? __pfx___split_vma+0x10/0x10 [ 30.268694] ? find_held_lock+0x2c/0x110 [ 30.269230] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.269806] ? lock_is_held_type+0x9f/0x120 [ 30.270358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.270990] ? mtree_range_walk+0x632/0x900 [ 30.271555] ? mas_walk+0x5c7/0x7c0 [ 30.272038] do_vmi_munmap+0x1f1/0x2b0 [ 30.272540] mmap_region+0x1f9/0x2660 [ 30.273038] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.273559] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.274290] ? __pfx_lock_acquire+0x10/0x10 [ 30.274839] ? __pfx_mmap_region+0x10/0x10 [ 30.275383] ? security_mmap_addr+0x7d/0xa0 [ 30.275923] ? get_unmapped_area+0x1f5/0x3f0 [ 30.276473] do_mmap+0x854/0xf00 [ 30.276925] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.277422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.277987] ksys_mmap_pgoff+0x3af/0x500 [ 30.278528] do_syscall_64+0x3f/0x90 [ 30.279014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279679] RIP: 0033:0x7f09fd410d82 [ 30.280144] 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 [ 30.282307] RSP: 002b:00007ffd17dfe288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.283247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09fd410d82 [ 30.284108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09fc84a000 [ 30.284967] RBP: 00007f09fc84a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.285826] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636d47baf70 [ 30.286698] R13: 00007ffd17dfe2a0 R14: 00007ffd17dfe2d0 R15: 00007ffd17dfe630 [ 30.287557] [ 30.287853] [ 30.288070] Allocated by task 213: [ 30.288507] kasan_save_stack+0x22/0x50 [ 30.289022] kasan_set_track+0x25/0x30 [ 30.289529] __kasan_slab_alloc+0x59/0x70 [ 30.290057] kmem_cache_alloc+0x16b/0x370 [ 30.290594] vm_area_dup+0x20/0x160 [ 30.291052] __split_vma+0x170/0x950 [ 30.291535] split_vma+0xc6/0x110 [ 30.291977] mprotect_fixup+0x8d2/0xb30 [ 30.292487] do_mprotect_pkey+0x87e/0xd40 [ 30.293014] __x64_sys_mprotect+0x78/0xc0 [ 30.293550] do_syscall_64+0x3f/0x90 [ 30.294027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.294683] [ 30.294899] Freed by task 210: [ 30.295302] kasan_save_stack+0x22/0x50 [ 30.295813] kasan_set_track+0x25/0x30 [ 30.296316] kasan_save_free_info+0x2b/0x50 [ 30.296862] __kasan_slab_free+0x10a/0x190 [ 30.297402] kmem_cache_free+0x10d/0x4d0 [ 30.297910] rcu_core+0x8c8/0x2860 [ 30.298357] __do_softirq+0x1b7/0x7d4 [ 30.298857] [ 30.299080] Last potentially related work creation: [ 30.299674] kasan_save_stack+0x22/0x50 [ 30.300185] __kasan_record_aux_stack+0x8e/0xa0 [ 30.300763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.301411] remove_vma+0x139/0x170 [ 30.301865] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.302421] do_vmi_munmap+0x1f1/0x2b0 [ 30.302919] __vm_munmap+0x138/0x3a0 [ 30.303401] __x64_sys_munmap+0x59/0x80 [ 30.303906] do_syscall_64+0x3f/0x90 [ 30.304383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.305037] [ 30.305251] The buggy address belongs to the object at ffff88800fd219f8 [ 30.305251] which belongs to the cache vm_area_struct of size 168 [ 30.306751] The buggy address is located 88 bytes inside of [ 30.306751] freed 168-byte region [ffff88800fd219f8, ffff88800fd21aa0) [ 30.308176] [ 30.308391] The buggy address belongs to the physical page: [ 30.309056] page:0000000094e0a139 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd21 [ 30.310159] memcg:ffff88800e029d01 [ 30.310601] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.311255] page_type: 0xffffffff() [ 30.311706] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.312635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e029d01 [ 30.313554] page dumped because: kasan: bad access detected [ 30.314221] [ 30.314434] Memory state around the buggy address: [ 30.315044] ffff88800fd21900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.315908] ffff88800fd21980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.316773] >ffff88800fd21a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.317633] ^ [ 30.318334] ffff88800fd21a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.319213] ffff88800fd21b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.320075] ================================================================== [ 30.321242] Disabling lock debugging due to kernel taint [ 32.178724] BUG: Bad rss-counter state mm:0000000083a8d903 type:MM_FILEPAGES val:33 [ 32.179542] BUG: Bad rss-counter state mm:0000000083a8d903 type:MM_ANONPAGES val:22 [ 32.658754] BUG: Bad rss-counter state mm:000000008faedd79 type:MM_FILEPAGES val:33 [ 32.660300] BUG: Bad rss-counter state mm:000000008faedd79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35317' (ECDSA) to the list of known hosts. 2023/06/20 14:42:55 fuzzer started 2023/06/20 14:42:55 dialing manager at localhost:36067 2023/06/20 14:42:55 checking machine... 2023/06/20 14:42:55 checking revisions... [ 33.412898] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:42:56 testing simple program... [ 33.470320] cgroup: Unknown subsys name 'net' [ 33.530859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:42:55 Registers: info registers vcpu 0 RAX=ffffffff86139749 RBX=0000000000000002 RCX=ffffffff86139744 RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85dfe5d0 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff8613971a R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130a72 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 00007f3e0e7e6900 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=00007f3e0ed9e0b0 CR3=0000000016c74000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00000000ffffff9c RCX=ffffffff8185aef5 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=1ffff11002ba0fd1 RSP=ffff888015d07e80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000080802 R13=0000000000000000 R14=000055a53986eec0 R15=0000000000000000 RIP=ffffffff814c0250 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 00007fd51052e900 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=00007fd50fa4c000 CR3=000000000d68c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9f5fdbba24274df700000000000ae988 XMM05=f78653a6d79bd6810000000000132e20 XMM06=7824f0c0fcc7e6f70000000000131bc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000