syzkaller login: [ 70.923065] BUG: Bad rss-counter state mm:0000000060fa0667 type:MM_FILEPAGES val:33 [ 70.924288] BUG: Bad rss-counter state mm:0000000060fa0667 type:MM_ANONPAGES val:22 [ 71.066862] ================================================================== [ 71.067787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.068720] Read of size 8 at addr ffff88800de9b968 by task sshd/219 [ 71.069510] [ 71.069825] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 71.070693] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.071699] Call Trace: [ 71.072036] [ 71.072326] dump_stack_lvl+0x91/0xf0 [ 71.072820] print_report+0xcc/0x620 [ 71.073340] ? __virt_addr_valid+0x102/0x340 [ 71.073900] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.074542] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.075177] kasan_report+0xbe/0xf0 [ 71.075659] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.076281] vma_interval_tree_remove+0xc75/0xec0 [ 71.076900] vma_prepare+0xc54/0x11a0 [ 71.077395] __split_vma+0x5af/0x950 [ 71.077867] ? __pfx___split_vma+0x10/0x10 [ 71.078400] ? find_held_lock+0x2c/0x110 [ 71.078927] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.079494] ? lock_is_held_type+0x9f/0x120 [ 71.080037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.080654] ? mtree_range_walk+0x632/0x900 [ 71.081226] ? mas_walk+0x5c7/0x7c0 [ 71.081707] do_vmi_munmap+0x1f1/0x2b0 [ 71.082215] mmap_region+0x1f9/0x2660 [ 71.082706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.083235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.083966] ? __pfx_lock_acquire+0x10/0x10 [ 71.084497] ? __pfx_mmap_region+0x10/0x10 [ 71.085032] ? security_mmap_addr+0x7d/0xa0 [ 71.085579] ? get_unmapped_area+0x1f5/0x3f0 [ 71.086127] do_mmap+0x854/0xf00 [ 71.086570] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.087061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.087628] ksys_mmap_pgoff+0x3af/0x500 [ 71.088129] do_syscall_64+0x3f/0x90 [ 71.088607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.089266] RIP: 0033:0x7f12e5d2dd82 [ 71.089719] 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 [ 71.091863] RSP: 002b:00007fffb6f48fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.092784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12e5d2dd82 [ 71.093647] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12e5167000 [ 71.094496] RBP: 00007f12e5167000 R08: 0000000000000009 R09: 0000000000001000 [ 71.095370] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605fab90ec0 [ 71.096226] R13: 00007fffb6f48fe0 R14: 00007fffb6f49010 R15: 00007fffb6f49370 [ 71.097092] [ 71.097408] [ 71.097626] Allocated by task 212: [ 71.098059] kasan_save_stack+0x22/0x50 [ 71.098568] kasan_set_track+0x25/0x30 [ 71.099063] __kasan_slab_alloc+0x59/0x70 [ 71.099592] kmem_cache_alloc+0x16b/0x370 [ 71.100110] vm_area_dup+0x20/0x160 [ 71.100573] __split_vma+0x170/0x950 [ 71.101044] split_vma+0xc6/0x110 [ 71.101499] mprotect_fixup+0x8d2/0xb30 [ 71.102007] do_mprotect_pkey+0x87e/0xd40 [ 71.102529] __x64_sys_mprotect+0x78/0xc0 [ 71.103054] do_syscall_64+0x3f/0x90 [ 71.103533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.104184] [ 71.104402] Freed by task 210: [ 71.104810] kasan_save_stack+0x22/0x50 [ 71.105332] kasan_set_track+0x25/0x30 [ 71.105847] kasan_save_free_info+0x2b/0x50 [ 71.106382] __kasan_slab_free+0x10a/0x190 [ 71.106916] kmem_cache_free+0x10d/0x4d0 [ 71.107424] rcu_core+0x8c8/0x2860 [ 71.107873] __do_softirq+0x1b7/0x7d4 [ 71.108350] [ 71.108564] Last potentially related work creation: [ 71.109146] kasan_save_stack+0x22/0x50 [ 71.109663] __kasan_record_aux_stack+0x8e/0xa0 [ 71.110245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.110925] remove_vma+0x139/0x170 [ 71.111383] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.111965] do_vmi_munmap+0x1f1/0x2b0 [ 71.112462] __vm_munmap+0x138/0x3a0 [ 71.112935] __x64_sys_munmap+0x59/0x80 [ 71.113441] do_syscall_64+0x3f/0x90 [ 71.113918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.114559] [ 71.114779] Second to last potentially related work creation: [ 71.115468] kasan_save_stack+0x22/0x50 [ 71.115972] __kasan_record_aux_stack+0x8e/0xa0 [ 71.116542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.117206] remove_vma+0x139/0x170 [ 71.117682] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.118264] do_vmi_munmap+0x1f1/0x2b0 [ 71.118753] mmap_region+0x1f9/0x2660 [ 71.119236] do_mmap+0x854/0xf00 [ 71.119672] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.120165] ksys_mmap_pgoff+0x3af/0x500 [ 71.120677] do_syscall_64+0x3f/0x90 [ 71.121167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.121823] [ 71.122041] The buggy address belongs to the object at ffff88800de9b910 [ 71.122041] which belongs to the cache vm_area_struct of size 168 [ 71.123526] The buggy address is located 88 bytes inside of [ 71.123526] freed 168-byte region [ffff88800de9b910, ffff88800de9b9b8) [ 71.124942] [ 71.125160] The buggy address belongs to the physical page: [ 71.125827] page:000000004abf5738 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde9b [ 71.126914] memcg:ffff88800f1d2b01 [ 71.127352] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.127997] page_type: 0xffffffff() [ 71.128453] raw: 0100000000000200 ffff88800879fc80 ffffea0000665f40 dead000000000008 [ 71.129407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1d2b01 [ 71.130318] page dumped because: kasan: bad access detected [ 71.130974] [ 71.131195] Memory state around the buggy address: [ 71.131775] ffff88800de9b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 71.132639] ffff88800de9b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 71.133513] >ffff88800de9b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.134369] ^ [ 71.135173] ffff88800de9b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 71.136053] ffff88800de9ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.136914] ================================================================== [ 71.137963] Disabling lock debugging due to kernel taint [ 73.271973] BUG: Bad rss-counter state mm:000000008b0d7809 type:MM_FILEPAGES val:33 [ 73.273193] BUG: Bad rss-counter state mm:000000008b0d7809 type:MM_ANONPAGES val:22 [ 73.789846] BUG: Bad rss-counter state mm:000000002ccd5b9a type:MM_FILEPAGES val:33 [ 73.791295] BUG: Bad rss-counter state mm:000000002ccd5b9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28686' (ECDSA) to the list of known hosts. 2023/06/19 14:52:43 fuzzer started 2023/06/19 14:52:43 dialing manager at localhost:44161 2023/06/19 14:52:43 checking machine... 2023/06/19 14:52:43 checking revisions... [ 74.493777] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:52:44 testing simple program... [ 74.537899] cgroup: Unknown subsys name 'net' [ 74.598202] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:52:33 Registers: info registers vcpu 0 RAX=ffffffff8186d60e RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019eb7d01 RSI=ffff888019eb7d90 RDI=ffff888019eb7d90 RBP=ffff888019eb7990 RSP=ffff888019eb78c0 R8 =ffffffff86141eb6 R9 =ffff888019eb7978 R10=0000000000038001 R11=00000000000229cd R12=ffff888019eb7998 R13=ffff888019eb7980 R14=ffff888019eb7d98 R15=ffff888019eb7938 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f63f2bc3900 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=00007f63f3178650 CR3=000000000c54a000 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=0000000000000000 RBX=ffff88806cf09b18 RCX=0000000000000001 RDX=1ffff1100d9e1364 RSI=ffffffff81893972 RDI=ffff88806cf09b20 RBP=0000000000000013 RSP=ffff88806cf09a30 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888014603680 R15=ffff88800ee25700 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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 00007f24de7c4900 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=00007f24ddc15180 CR3=000000000ce18000 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=eeb9573ecbea9df300000000000ae988 XMM05=b20ba6d422a573b70000000000135b70 XMM06=dfcdbad4f1609c370000000000133f30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000