syzkaller login: [ 31.541676] BUG: Bad rss-counter state mm:00000000caca06f8 type:MM_FILEPAGES val:33 [ 31.542452] BUG: Bad rss-counter state mm:00000000caca06f8 type:MM_ANONPAGES val:22 [ 31.667915] ================================================================== [ 31.668616] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.669374] Read of size 8 at addr ffff88800e0965c8 by task sshd/220 [ 31.669965] [ 31.670143] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.670801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.671547] Call Trace: [ 31.671791] [ 31.672007] dump_stack_lvl+0x91/0xf0 [ 31.672553] print_report+0xcc/0x620 [ 31.672932] ? __virt_addr_valid+0x102/0x340 [ 31.673363] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.673838] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674312] kasan_report+0xbe/0xf0 [ 31.674693] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.675171] vma_interval_tree_remove+0xc75/0xec0 [ 31.675633] vma_prepare+0xc54/0x11a0 [ 31.676005] __split_vma+0x5af/0x950 [ 31.676363] ? __pfx___split_vma+0x10/0x10 [ 31.676789] ? find_held_lock+0x2c/0x110 [ 31.677197] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.677636] ? lock_is_held_type+0x9f/0x120 [ 31.678047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.678516] ? mtree_range_walk+0x632/0x900 [ 31.678940] ? mas_walk+0x5c7/0x7c0 [ 31.679305] do_vmi_munmap+0x1f1/0x2b0 [ 31.679681] mmap_region+0x1f9/0x2660 [ 31.680054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.680448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.681010] ? __pfx_lock_acquire+0x10/0x10 [ 31.681424] ? __pfx_mmap_region+0x10/0x10 [ 31.681838] ? security_mmap_addr+0x7d/0xa0 [ 31.682261] ? get_unmapped_area+0x1f5/0x3f0 [ 31.682684] do_mmap+0x854/0xf00 [ 31.683021] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.683403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.683836] ksys_mmap_pgoff+0x3af/0x500 [ 31.684229] do_syscall_64+0x3f/0x90 [ 31.684596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.685103] RIP: 0033:0x7f2daa75bd82 [ 31.685458] 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 [ 31.687102] RSP: 002b:00007ffdd6fd7f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.687797] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2daa75bd82 [ 31.688455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2da9b95000 [ 31.689133] RBP: 00007f2da9b95000 R08: 0000000000000009 R09: 0000000000001000 [ 31.689785] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af533a6f70 [ 31.690441] R13: 00007ffdd6fd7f30 R14: 00007ffdd6fd7f60 R15: 00007ffdd6fd82c0 [ 31.691103] [ 31.691329] [ 31.691496] Allocated by task 213: [ 31.691826] kasan_save_stack+0x22/0x50 [ 31.692217] kasan_set_track+0x25/0x30 [ 31.692594] __kasan_slab_alloc+0x59/0x70 [ 31.693003] kmem_cache_alloc+0x16b/0x370 [ 31.693402] vm_area_dup+0x20/0x160 [ 31.693756] __split_vma+0x170/0x950 [ 31.694120] split_vma+0xc6/0x110 [ 31.694456] mprotect_fixup+0x8d2/0xb30 [ 31.694846] do_mprotect_pkey+0x87e/0xd40 [ 31.695252] __x64_sys_mprotect+0x78/0xc0 [ 31.695652] do_syscall_64+0x3f/0x90 [ 31.696020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.696516] [ 31.696687] Freed by task 19: [ 31.696982] kasan_save_stack+0x22/0x50 [ 31.697378] kasan_set_track+0x25/0x30 [ 31.697760] kasan_save_free_info+0x2b/0x50 [ 31.698170] __kasan_slab_free+0x10a/0x190 [ 31.698581] kmem_cache_free+0x10d/0x4d0 [ 31.698978] rcu_core+0x8c8/0x2860 [ 31.699319] __do_softirq+0x1b7/0x7d4 [ 31.699688] [ 31.699857] Last potentially related work creation: [ 31.700311] kasan_save_stack+0x22/0x50 [ 31.700716] __kasan_record_aux_stack+0x8e/0xa0 [ 31.701161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.701655] remove_vma+0x139/0x170 [ 31.702006] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.702442] do_vmi_munmap+0x1f1/0x2b0 [ 31.702821] __vm_munmap+0x138/0x3a0 [ 31.703181] __x64_sys_munmap+0x59/0x80 [ 31.703596] do_syscall_64+0x3f/0x90 [ 31.703981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704472] [ 31.704635] The buggy address belongs to the object at ffff88800e096570 [ 31.704635] which belongs to the cache vm_area_struct of size 168 [ 31.705784] The buggy address is located 88 bytes inside of [ 31.705784] freed 168-byte region [ffff88800e096570, ffff88800e096618) [ 31.706865] [ 31.707038] The buggy address belongs to the physical page: [ 31.707542] page:00000000e73ce5e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe096 [ 31.708380] memcg:ffff88800d575f01 [ 31.708725] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.709268] page_type: 0xffffffff() [ 31.709624] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.710335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d575f01 [ 31.711038] page dumped because: kasan: bad access detected [ 31.711556] [ 31.711719] Memory state around the buggy address: [ 31.712160] ffff88800e096480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.712826] ffff88800e096500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.713592] >ffff88800e096580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.714253] ^ [ 31.714766] ffff88800e096600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.715431] ffff88800e096680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.716091] ================================================================== [ 31.716821] Disabling lock debugging due to kernel taint [ 33.997772] BUG: Bad rss-counter state mm:000000006ecb2ee0 type:MM_FILEPAGES val:33 [ 33.998795] BUG: Bad rss-counter state mm:000000006ecb2ee0 type:MM_ANONPAGES val:22 [ 34.448935] BUG: Bad rss-counter state mm:00000000eb46b5b7 type:MM_FILEPAGES val:33 [ 34.450126] BUG: Bad rss-counter state mm:00000000eb46b5b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10234' (ECDSA) to the list of known hosts. 2023/06/19 22:58:09 fuzzer started 2023/06/19 22:58:09 dialing manager at localhost:44161 2023/06/19 22:58:09 checking machine... 2023/06/19 22:58:09 checking revisions... [ 35.186019] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:58:09 testing simple program... [ 35.226479] cgroup: Unknown subsys name 'net' [ 35.295786] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:58:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff1100394bfa5 RSI=000000000000000d RDI=ffffffff85bae420 RBP=ffffffff85bae420 RSP=ffff88801ca5fba0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff88801ca5fd28 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff838ceece 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 00007f2703261900 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=00007f2703818618 CR3=000000000c93c000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007ffd7ef0e478 CR3=000000000e010000 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=2038303a38353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a38353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000