syzkaller login: [ 60.108867] BUG: Bad rss-counter state mm:000000006e61fa41 type:MM_FILEPAGES val:33 [ 60.109963] BUG: Bad rss-counter state mm:000000006e61fa41 type:MM_ANONPAGES val:22 [ 60.241932] ================================================================== [ 60.242552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.243144] Read of size 8 at addr ffff88800e83c968 by task sshd/222 [ 60.243653] [ 60.243801] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.244381] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.245040] Call Trace: [ 60.245264] [ 60.245505] dump_stack_lvl+0x91/0xf0 [ 60.245858] print_report+0xcc/0x620 [ 60.246421] ? __virt_addr_valid+0x102/0x340 [ 60.246796] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.247240] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.247681] kasan_report+0xbe/0xf0 [ 60.248016] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.248510] vma_interval_tree_remove+0xc75/0xec0 [ 60.248956] vma_prepare+0xc54/0x11a0 [ 60.249293] __split_vma+0x5af/0x950 [ 60.249649] ? __pfx___split_vma+0x10/0x10 [ 60.250021] ? find_held_lock+0x2c/0x110 [ 60.250385] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.250744] ? lock_is_held_type+0x9f/0x120 [ 60.251095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.251513] ? mtree_range_walk+0x632/0x900 [ 60.251902] ? mas_walk+0x5c7/0x7c0 [ 60.252259] do_vmi_munmap+0x1f1/0x2b0 [ 60.252626] mmap_region+0x1f9/0x2660 [ 60.253003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.253475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.253967] ? __pfx_lock_acquire+0x10/0x10 [ 60.254363] ? __pfx_mmap_region+0x10/0x10 [ 60.254726] ? security_mmap_addr+0x7d/0xa0 [ 60.255083] ? get_unmapped_area+0x1f5/0x3f0 [ 60.255478] do_mmap+0x854/0xf00 [ 60.255773] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.256145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.256534] ksys_mmap_pgoff+0x3af/0x500 [ 60.256889] do_syscall_64+0x3f/0x90 [ 60.257260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.257783] RIP: 0033:0x7f300c386d82 [ 60.258114] 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 [ 60.259607] RSP: 002b:00007ffec2ab80d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.260222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f300c386d82 [ 60.260806] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f300b7c0000 [ 60.261470] RBP: 00007f300b7c0000 R08: 0000000000000009 R09: 0000000000001000 [ 60.262057] R10: 0000000000000812 R11: 0000000000000206 R12: 000056276a0a5ec0 [ 60.262693] R13: 00007ffec2ab80f0 R14: 00007ffec2ab8120 R15: 00007ffec2ab8480 [ 60.263298] [ 60.263495] [ 60.263641] Allocated by task 215: [ 60.263930] kasan_save_stack+0x22/0x50 [ 60.264336] kasan_set_track+0x25/0x30 [ 60.264682] __kasan_slab_alloc+0x59/0x70 [ 60.265045] kmem_cache_alloc+0x16b/0x370 [ 60.265484] vm_area_dup+0x20/0x160 [ 60.265795] __split_vma+0x170/0x950 [ 60.266132] split_vma+0xc6/0x110 [ 60.266476] mprotect_fixup+0x8d2/0xb30 [ 60.266821] do_mprotect_pkey+0x87e/0xd40 [ 60.267202] __x64_sys_mprotect+0x78/0xc0 [ 60.267570] do_syscall_64+0x3f/0x90 [ 60.267903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.268356] [ 60.268504] Freed by task 13: [ 60.268758] kasan_save_stack+0x22/0x50 [ 60.269106] kasan_set_track+0x25/0x30 [ 60.269501] kasan_save_free_info+0x2b/0x50 [ 60.269860] __kasan_slab_free+0x10a/0x190 [ 60.270230] kmem_cache_free+0x10d/0x4d0 [ 60.270583] rcu_core+0x8c8/0x2860 [ 60.270894] __do_softirq+0x1b7/0x7d4 [ 60.271233] [ 60.271384] Last potentially related work creation: [ 60.271795] kasan_save_stack+0x22/0x50 [ 60.272176] __kasan_record_aux_stack+0x8e/0xa0 [ 60.272575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.273019] remove_vma+0x139/0x170 [ 60.273336] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.273762] do_vmi_munmap+0x1f1/0x2b0 [ 60.274099] __vm_munmap+0x138/0x3a0 [ 60.274427] __x64_sys_munmap+0x59/0x80 [ 60.274766] do_syscall_64+0x3f/0x90 [ 60.275090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.275519] [ 60.275665] The buggy address belongs to the object at ffff88800e83c910 [ 60.275665] which belongs to the cache vm_area_struct of size 168 [ 60.276670] The buggy address is located 88 bytes inside of [ 60.276670] freed 168-byte region [ffff88800e83c910, ffff88800e83c9b8) [ 60.277750] [ 60.277902] The buggy address belongs to the physical page: [ 60.278385] page:00000000d0d31557 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe83c [ 60.279104] memcg:ffff888013fe7801 [ 60.279436] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.279876] page_type: 0xffffffff() [ 60.280165] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.280755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fe7801 [ 60.281450] page dumped because: kasan: bad access detected [ 60.281902] [ 60.282047] Memory state around the buggy address: [ 60.282497] ffff88800e83c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 60.283091] ffff88800e83c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 60.283675] >ffff88800e83c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.284256] ^ [ 60.284806] ffff88800e83c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 60.285470] ffff88800e83ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.286039] ================================================================== [ 60.286840] Disabling lock debugging due to kernel taint [ 62.224859] BUG: Bad rss-counter state mm:0000000045df73c3 type:MM_FILEPAGES val:33 [ 62.225631] BUG: Bad rss-counter state mm:0000000045df73c3 type:MM_ANONPAGES val:22 [ 62.597913] BUG: Bad rss-counter state mm:00000000109f3192 type:MM_FILEPAGES val:33 [ 62.598640] BUG: Bad rss-counter state mm:00000000109f3192 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52022' (ECDSA) to the list of known hosts. 2023/06/21 09:02:15 fuzzer started 2023/06/21 09:02:15 dialing manager at localhost:36067 2023/06/21 09:02:15 checking machine... 2023/06/21 09:02:15 checking revisions... [ 63.185911] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:02:15 testing simple program... [ 63.220603] cgroup: Unknown subsys name 'net' [ 63.269125] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:02:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c5191d0 RCX=0000000000000000 RDX=ffff8880197c9b40 RSI=ffffffff844a4fca RDI=0000000000000005 RBP=0000000001fbcec1 RSP=ffff88800fd6fce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000005 R13=ffff888015ed5380 R14=00007ffc97c1d000 R15=00007ffc97c3dfff RIP=ffffffff844a4fce RFL=00000293 [--S-A-C] 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 00007f79276b8900 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=00007ffc97c352ac CR3=000000000b3a4000 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=99474d742ae6b5df17c13585cbee3617 XMM03=bd2d929d10cc58e15895cfcdc5b2628c XMM04=d6f3d9c5cedffb5ec9d507d9300e519e XMM05=000000000000000000000000000000ff XMM06=bd2d929d10cc585e589507cd300e518c XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007f4c200bef00 CR3=000000000c5c0000 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=6c85eef6a806de851d431aa24b917f60 XMM02=000000000011b408ec2efd57dc4c00df XMM03=00000000001221b065593101876717c8 XMM04=4f5896aeb4b9882d00000000000ae988 XMM05=59d5b690e0af863b0000000000131f90 XMM06=cfa6d018351d48ab0000000000130df8 XMM07=e042d86d42eb936e0000000000122430 XMM08=65593101876717c8000000000011b468 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000