syzkaller login: [ 48.345699] BUG: Bad rss-counter state mm:00000000892c5bfe type:MM_FILEPAGES val:33 [ 48.347020] BUG: Bad rss-counter state mm:00000000892c5bfe type:MM_ANONPAGES val:22 [ 48.507221] ================================================================== [ 48.508153] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.509067] Read of size 8 at addr ffff88801835fed8 by task sshd/219 [ 48.509823] [ 48.510203] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.511082] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.512062] Call Trace: [ 48.512398] [ 48.512681] dump_stack_lvl+0x91/0xf0 [ 48.513169] print_report+0xcc/0x620 [ 48.513655] ? __virt_addr_valid+0x102/0x340 [ 48.514205] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.514819] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.515457] kasan_report+0xbe/0xf0 [ 48.515941] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.516568] vma_interval_tree_remove+0xc75/0xec0 [ 48.517197] vma_prepare+0xc54/0x11a0 [ 48.517686] __split_vma+0x5af/0x950 [ 48.518170] ? __pfx___split_vma+0x10/0x10 [ 48.518715] ? find_held_lock+0x2c/0x110 [ 48.519270] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.519853] ? lock_is_held_type+0x9f/0x120 [ 48.520411] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.521039] ? mtree_range_walk+0x632/0x900 [ 48.521606] ? mas_walk+0x5c7/0x7c0 [ 48.522095] do_vmi_munmap+0x1f1/0x2b0 [ 48.522604] mmap_region+0x1f9/0x2660 [ 48.523114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.523644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.524383] ? __pfx_lock_acquire+0x10/0x10 [ 48.524932] ? __pfx_mmap_region+0x10/0x10 [ 48.525481] ? security_mmap_addr+0x7d/0xa0 [ 48.526039] ? get_unmapped_area+0x1f5/0x3f0 [ 48.526615] do_mmap+0x854/0xf00 [ 48.527069] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.527616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.528210] ksys_mmap_pgoff+0x3af/0x500 [ 48.528738] do_syscall_64+0x3f/0x90 [ 48.529230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.529898] RIP: 0033:0x7f4571d65d82 [ 48.530372] 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 [ 48.532604] RSP: 002b:00007ffee20bc788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.533559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4571d65d82 [ 48.534451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f457119f000 [ 48.535340] RBP: 00007f457119f000 R08: 0000000000000009 R09: 0000000000001000 [ 48.536224] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf3827ef70 [ 48.537104] R13: 00007ffee20bc7a0 R14: 00007ffee20bc7d0 R15: 00007ffee20bcb30 [ 48.537997] [ 48.538300] [ 48.538524] Allocated by task 211: [ 48.538969] kasan_save_stack+0x22/0x50 [ 48.539512] kasan_set_track+0x25/0x30 [ 48.540022] __kasan_slab_alloc+0x59/0x70 [ 48.540576] kmem_cache_alloc+0x16b/0x370 [ 48.541109] vm_area_dup+0x20/0x160 [ 48.541570] __split_vma+0x170/0x950 [ 48.542051] split_vma+0xc6/0x110 [ 48.542510] mprotect_fixup+0x8d2/0xb30 [ 48.543029] do_mprotect_pkey+0x87e/0xd40 [ 48.543582] __x64_sys_mprotect+0x78/0xc0 [ 48.544124] do_syscall_64+0x3f/0x90 [ 48.544624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.545288] [ 48.545509] Freed by task 19: [ 48.545906] kasan_save_stack+0x22/0x50 [ 48.546430] kasan_set_track+0x25/0x30 [ 48.546940] kasan_save_free_info+0x2b/0x50 [ 48.547495] __kasan_slab_free+0x10a/0x190 [ 48.548049] kmem_cache_free+0x10d/0x4d0 [ 48.548577] rcu_core+0x8c8/0x2860 [ 48.549035] __do_softirq+0x1b7/0x7d4 [ 48.549528] [ 48.549754] Last potentially related work creation: [ 48.550360] kasan_save_stack+0x22/0x50 [ 48.550882] __kasan_record_aux_stack+0x8e/0xa0 [ 48.551569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.552354] remove_vma+0x139/0x170 [ 48.552835] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.553421] do_vmi_munmap+0x1f1/0x2b0 [ 48.553989] __vm_munmap+0x138/0x3a0 [ 48.554521] __x64_sys_munmap+0x59/0x80 [ 48.555046] do_syscall_64+0x3f/0x90 [ 48.555554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.556220] [ 48.556444] The buggy address belongs to the object at ffff88801835fe80 [ 48.556444] which belongs to the cache vm_area_struct of size 168 [ 48.557981] The buggy address is located 88 bytes inside of [ 48.557981] freed 168-byte region [ffff88801835fe80, ffff88801835ff28) [ 48.559460] [ 48.559682] The buggy address belongs to the physical page: [ 48.560373] page:00000000db6ab4ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1835f [ 48.561531] memcg:ffff888016de7701 [ 48.561975] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 48.562715] page_type: 0xffffffff() [ 48.563210] raw: 0100000000000200 ffff88800879fc80 ffffea0000608b00 0000000000000005 [ 48.564180] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016de7701 [ 48.565149] page dumped because: kasan: bad access detected [ 48.565850] [ 48.566078] Memory state around the buggy address: [ 48.566695] ffff88801835fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 48.567611] ffff88801835fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 48.568501] >ffff88801835fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.569395] ^ [ 48.570157] ffff88801835ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 48.571052] ffff88801835ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.571949] ================================================================== [ 48.572963] Disabling lock debugging due to kernel taint [ 50.755494] BUG: Bad rss-counter state mm:00000000be7128f2 type:MM_FILEPAGES val:33 [ 50.756483] BUG: Bad rss-counter state mm:00000000be7128f2 type:MM_ANONPAGES val:22 [ 51.212966] BUG: Bad rss-counter state mm:0000000055b2b1e2 type:MM_FILEPAGES val:33 [ 51.214618] BUG: Bad rss-counter state mm:0000000055b2b1e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22666' (ECDSA) to the list of known hosts. 2023/06/19 13:45:16 fuzzer started 2023/06/19 13:45:16 dialing manager at localhost:44161 2023/06/19 13:45:16 checking machine... 2023/06/19 13:45:16 checking revisions... [ 51.925175] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:45:16 testing simple program... [ 51.976382] cgroup: Unknown subsys name 'net' [ 52.018691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:44:56 Registers: info registers vcpu 0 RAX=ffffffff864b9d57 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800dabf750 RSP=ffff88800dabf688 R8 =ffffffff864b9d5a R9 =ffff88800dabf738 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800dabf758 R13=ffff88800dabf740 R14=ffff88800dabff58 R15=ffff88800dabf6f8 RIP=ffffffff81130b99 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 00007fe15c3a7900 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=00007f0c552e1650 CR3=000000000d794000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=21a180bc0aa4230f00000000000ae988 XMM05=b1beb5f3b12046f50000000000135318 XMM06=19e9129bd510f23500000000001341b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd892bcea8 CR3=000000000e866000 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=2036313a35343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a35343a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000