syzkaller login: [ 29.115614] BUG: Bad rss-counter state mm:0000000003b388d4 type:MM_FILEPAGES val:33 [ 29.117387] BUG: Bad rss-counter state mm:0000000003b388d4 type:MM_ANONPAGES val:22 [ 29.180207] ================================================================== [ 29.181123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.182065] Read of size 8 at addr ffff888019f4ced8 by task sshd/219 [ 29.182833] [ 29.183051] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.183932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.184910] Call Trace: [ 29.185226] [ 29.185514] dump_stack_lvl+0x91/0xf0 [ 29.186011] print_report+0xcc/0x620 [ 29.186496] ? __virt_addr_valid+0x102/0x340 [ 29.187050] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.187674] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.188320] kasan_report+0xbe/0xf0 [ 29.188805] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.189432] vma_interval_tree_remove+0xc75/0xec0 [ 29.190042] vma_prepare+0xc54/0x11a0 [ 29.190526] __split_vma+0x5af/0x950 [ 29.190997] ? __pfx___split_vma+0x10/0x10 [ 29.191528] ? find_held_lock+0x2c/0x110 [ 29.192060] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.192627] ? lock_is_held_type+0x9f/0x120 [ 29.193166] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.193775] ? mtree_range_walk+0x632/0x900 [ 29.194329] ? mas_walk+0x5c7/0x7c0 [ 29.194805] do_vmi_munmap+0x1f1/0x2b0 [ 29.195294] mmap_region+0x1f9/0x2660 [ 29.195781] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.196309] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.197018] ? __pfx_lock_acquire+0x10/0x10 [ 29.197551] ? __pfx_mmap_region+0x10/0x10 [ 29.198076] ? security_mmap_addr+0x7d/0xa0 [ 29.198612] ? get_unmapped_area+0x1f5/0x3f0 [ 29.199158] do_mmap+0x854/0xf00 [ 29.199596] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.200097] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.200669] ksys_mmap_pgoff+0x3af/0x500 [ 29.201180] do_syscall_64+0x3f/0x90 [ 29.201649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.202296] RIP: 0033:0x7fe6cb182d82 [ 29.202747] 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 [ 29.204870] RSP: 002b:00007ffc92f329d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.205771] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6cb182d82 [ 29.206610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6ca5bc000 [ 29.207443] RBP: 00007fe6ca5bc000 R08: 0000000000000009 R09: 0000000000001000 [ 29.208306] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c836bfb20 [ 29.209143] R13: 00007ffc92f329f0 R14: 00007ffc92f32a20 R15: 00007ffc92f32d80 [ 29.210008] [ 29.210297] [ 29.210513] Allocated by task 212: [ 29.210941] kasan_save_stack+0x22/0x50 [ 29.211445] kasan_set_track+0x25/0x30 [ 29.211937] __kasan_slab_alloc+0x59/0x70 [ 29.212459] kmem_cache_alloc+0x16b/0x370 [ 29.212968] vm_area_dup+0x20/0x160 [ 29.213416] __split_vma+0x170/0x950 [ 29.213878] split_vma+0xc6/0x110 [ 29.214312] mprotect_fixup+0x8d2/0xb30 [ 29.214813] do_mprotect_pkey+0x87e/0xd40 [ 29.215332] __x64_sys_mprotect+0x78/0xc0 [ 29.215854] do_syscall_64+0x3f/0x90 [ 29.216350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.216990] [ 29.217205] Freed by task 212: [ 29.217596] kasan_save_stack+0x22/0x50 [ 29.218095] kasan_set_track+0x25/0x30 [ 29.218590] kasan_save_free_info+0x2b/0x50 [ 29.219130] __kasan_slab_free+0x10a/0x190 [ 29.219663] kmem_cache_free+0x10d/0x4d0 [ 29.220186] rcu_core+0x8c8/0x2860 [ 29.220634] __do_softirq+0x1b7/0x7d4 [ 29.221110] [ 29.221322] Last potentially related work creation: [ 29.221906] kasan_save_stack+0x22/0x50 [ 29.222405] __kasan_record_aux_stack+0x8e/0xa0 [ 29.222972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.223611] remove_vma+0x139/0x170 [ 29.224072] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.224630] do_vmi_munmap+0x1f1/0x2b0 [ 29.225124] __vm_munmap+0x138/0x3a0 [ 29.225604] __x64_sys_munmap+0x59/0x80 [ 29.226104] do_syscall_64+0x3f/0x90 [ 29.226585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.227237] [ 29.227456] The buggy address belongs to the object at ffff888019f4ce80 [ 29.227456] which belongs to the cache vm_area_struct of size 168 [ 29.228952] The buggy address is located 88 bytes inside of [ 29.228952] freed 168-byte region [ffff888019f4ce80, ffff888019f4cf28) [ 29.230368] [ 29.230584] The buggy address belongs to the physical page: [ 29.231260] page:00000000fd0c01c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f4c [ 29.232383] memcg:ffff888016627501 [ 29.232810] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.233455] page_type: 0xffffffff() [ 29.233911] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.234872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016627501 [ 29.235930] page dumped because: kasan: bad access detected [ 29.236597] [ 29.236812] Memory state around the buggy address: [ 29.237391] ffff888019f4cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.238247] ffff888019f4ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.239093] >ffff888019f4ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.239950] ^ [ 29.240692] ffff888019f4cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.241543] ffff888019f4cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.242387] ================================================================== [ 29.243586] Disabling lock debugging due to kernel taint [ 31.593583] BUG: Bad rss-counter state mm:000000003370f34b type:MM_FILEPAGES val:33 [ 31.594810] BUG: Bad rss-counter state mm:000000003370f34b type:MM_ANONPAGES val:22 [ 32.039752] BUG: Bad rss-counter state mm:00000000f7fa9eb9 type:MM_FILEPAGES val:33 [ 32.040976] BUG: Bad rss-counter state mm:00000000f7fa9eb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34083' (ECDSA) to the list of known hosts. 2023/06/19 16:15:00 fuzzer started 2023/06/19 16:15:00 dialing manager at localhost:44161 2023/06/19 16:15:00 checking machine... 2023/06/19 16:15:00 checking revisions... [ 32.724232] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:15:00 testing simple program... [ 32.775014] cgroup: Unknown subsys name 'net' [ 32.812319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:14:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f81d16b89f1 RCX=0000000000000100 RDX=ffff88800ffc1b40 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f81d16b89f1 RSP=ffff88800dfef980 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f81d16b8000 R11=00000000000b6cb2 R12=ffff88800dfefaa0 R13=0000000000000000 R14=ffff88800ffc1b40 R15=ffff88800cc49b80 RIP=ffffffff811fc714 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f81d123c900 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=00007f81d17f40b0 CR3=000000001ca38000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007ffce0727a18 CR3=000000000d9de000 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=2030303a35313a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a34313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000