syzkaller login: [ 38.669872] BUG: Bad rss-counter state mm:000000005afdda59 type:MM_FILEPAGES val:33 [ 38.671481] BUG: Bad rss-counter state mm:000000005afdda59 type:MM_ANONPAGES val:22 [ 38.833588] ================================================================== [ 38.834578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.835545] Read of size 8 at addr ffff888018e5ded8 by task sshd/229 [ 38.836485] [ 38.836708] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.837601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.838594] Call Trace: [ 38.838912] [ 38.839237] dump_stack_lvl+0x91/0xf0 [ 38.839731] print_report+0xcc/0x620 [ 38.840272] ? __virt_addr_valid+0x102/0x340 [ 38.840828] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.841498] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.842148] kasan_report+0xbe/0xf0 [ 38.842645] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843284] vma_interval_tree_remove+0xc75/0xec0 [ 38.844033] vma_prepare+0xc54/0x11a0 [ 38.844669] __split_vma+0x5af/0x950 [ 38.845324] ? __pfx___split_vma+0x10/0x10 [ 38.845902] ? find_held_lock+0x2c/0x110 [ 38.846444] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.847024] ? lock_is_held_type+0x9f/0x120 [ 38.847584] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.848214] ? mtree_range_walk+0x632/0x900 [ 38.848783] ? mas_walk+0x5c7/0x7c0 [ 38.849314] do_vmi_munmap+0x1f1/0x2b0 [ 38.849820] mmap_region+0x1f9/0x2660 [ 38.850320] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.850843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.851578] ? __pfx_lock_acquire+0x10/0x10 [ 38.852139] ? __pfx_mmap_region+0x10/0x10 [ 38.852669] ? security_mmap_addr+0x7d/0xa0 [ 38.853256] ? get_unmapped_area+0x1f5/0x3f0 [ 38.853810] do_mmap+0x854/0xf00 [ 38.854269] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.854768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.855349] ksys_mmap_pgoff+0x3af/0x500 [ 38.855869] do_syscall_64+0x3f/0x90 [ 38.856372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.857035] RIP: 0033:0x7f26278b6d82 [ 38.857520] 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 [ 38.859719] RSP: 002b:00007ffcf8e48d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.860665] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26278b6d82 [ 38.861565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2626cf0000 [ 38.862452] RBP: 00007f2626cf0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.863334] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556de6625ec0 [ 38.864198] R13: 00007ffcf8e48d20 R14: 00007ffcf8e48d50 R15: 00007ffcf8e490b0 [ 38.865084] [ 38.865408] [ 38.865626] Allocated by task 222: [ 38.866062] kasan_save_stack+0x22/0x50 [ 38.866585] kasan_set_track+0x25/0x30 [ 38.867094] __kasan_slab_alloc+0x59/0x70 [ 38.867626] kmem_cache_alloc+0x16b/0x370 [ 38.868162] vm_area_dup+0x20/0x160 [ 38.868619] __split_vma+0x170/0x950 [ 38.869140] split_vma+0xc6/0x110 [ 38.869586] mprotect_fixup+0x8d2/0xb30 [ 38.870117] do_mprotect_pkey+0x87e/0xd40 [ 38.870644] __x64_sys_mprotect+0x78/0xc0 [ 38.871188] do_syscall_64+0x3f/0x90 [ 38.871667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.872348] [ 38.872563] Freed by task 222: [ 38.872953] kasan_save_stack+0x22/0x50 [ 38.873508] kasan_set_track+0x25/0x30 [ 38.874014] kasan_save_free_info+0x2b/0x50 [ 38.874565] __kasan_slab_free+0x10a/0x190 [ 38.875118] kmem_cache_free+0x10d/0x4d0 [ 38.875629] rcu_core+0x8c8/0x2860 [ 38.876109] __do_softirq+0x1b7/0x7d4 [ 38.876604] [ 38.876826] Last potentially related work creation: [ 38.877460] kasan_save_stack+0x22/0x50 [ 38.877967] __kasan_record_aux_stack+0x8e/0xa0 [ 38.878561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.879229] remove_vma+0x139/0x170 [ 38.879682] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.880258] do_vmi_munmap+0x1f1/0x2b0 [ 38.880747] __vm_munmap+0x138/0x3a0 [ 38.881282] __x64_sys_munmap+0x59/0x80 [ 38.881777] do_syscall_64+0x3f/0x90 [ 38.882275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.882920] [ 38.883152] The buggy address belongs to the object at ffff888018e5de80 [ 38.883152] which belongs to the cache vm_area_struct of size 168 [ 38.884668] The buggy address is located 88 bytes inside of [ 38.884668] freed 168-byte region [ffff888018e5de80, ffff888018e5df28) [ 38.886154] [ 38.886376] The buggy address belongs to the physical page: [ 38.887056] page:0000000023a4e941 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e5d [ 38.888184] memcg:ffff888015acec01 [ 38.888611] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.889319] page_type: 0xffffffff() [ 38.889776] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.890738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015acec01 [ 38.891666] page dumped because: kasan: bad access detected [ 38.892348] [ 38.892567] Memory state around the buggy address: [ 38.893188] ffff888018e5dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.894054] ffff888018e5de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.894926] >ffff888018e5de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.895811] ^ [ 38.896561] ffff888018e5df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.897477] ffff888018e5df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.898359] ================================================================== [ 38.899518] Disabling lock debugging due to kernel taint [ 41.767042] BUG: Bad rss-counter state mm:00000000dd9e605b type:MM_FILEPAGES val:33 [ 41.768038] BUG: Bad rss-counter state mm:00000000dd9e605b type:MM_ANONPAGES val:22 [ 42.257843] BUG: Bad rss-counter state mm:00000000d3794b6f type:MM_FILEPAGES val:33 [ 42.259457] BUG: Bad rss-counter state mm:00000000d3794b6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64479' (ECDSA) to the list of known hosts. 2023/06/20 23:39:26 fuzzer started 2023/06/20 23:39:26 dialing manager at localhost:36067 2023/06/20 23:39:26 checking machine... 2023/06/20 23:39:26 checking revisions... [ 43.015958] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:39:26 testing simple program... [ 43.063411] cgroup: Unknown subsys name 'net' [ 43.116221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:39:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e024780 RCX=00000000fffffd78 RDX=0000000000000001 RSI=ffff88807ffdc000 RDI=ffff888009965500 RBP=ffff88806ce09e38 RSP=ffff88806ce09e10 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8780 R13=ffffea0000380900 R14=ffffffff8186b835 R15=ffff888009965500 RIP=ffffffff81809e3c RFL=00000256 [---ZAP-] 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 00007f2faf93b900 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=00007f2fafef0650 CR3=000000000e79a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f80ae0df230 CR3=000000000d696000 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=46a2c8f4d8562abf324af179de1d940a XMM02=000000000011c378eff9b2d0a8fce9cb XMM03=000000000011c4482c67c8bc2e329bc3 XMM04=cd3c2179eb8da05d00000000000ae988 XMM05=bf6aad4ba51f8b170000000000132ab0 XMM06=8fede82a5ad58cbe00000000001317e0 XMM07=e042d86d42eb936e00000000001220b8 XMM08=34d03d411f8363c4000000000011c448 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000