syzkaller login: [ 31.035532] BUG: Bad rss-counter state mm:00000000a27fef37 type:MM_FILEPAGES val:33 [ 31.036955] BUG: Bad rss-counter state mm:00000000a27fef37 type:MM_ANONPAGES val:22 [ 31.208919] ================================================================== [ 31.209934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.210992] Read of size 8 at addr ffff88800d50fd08 by task sshd/220 [ 31.211959] [ 31.212195] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.213136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.214224] Call Trace: [ 31.214574] [ 31.214904] dump_stack_lvl+0x91/0xf0 [ 31.215448] print_report+0xcc/0x620 [ 31.215994] ? __virt_addr_valid+0x102/0x340 [ 31.216596] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217985] kasan_report+0xbe/0xf0 [ 31.218497] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219191] vma_interval_tree_remove+0xc75/0xec0 [ 31.219876] vma_prepare+0xc54/0x11a0 [ 31.220401] __split_vma+0x5af/0x950 [ 31.220929] ? __pfx___split_vma+0x10/0x10 [ 31.221502] ? find_held_lock+0x2c/0x110 [ 31.222090] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.222701] ? lock_is_held_type+0x9f/0x120 [ 31.223303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.223996] ? mtree_range_walk+0x632/0x900 [ 31.224597] ? mas_walk+0x5c7/0x7c0 [ 31.225137] do_vmi_munmap+0x1f1/0x2b0 [ 31.225672] mmap_region+0x1f9/0x2660 [ 31.226206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.226766] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.227583] ? __pfx_lock_acquire+0x10/0x10 [ 31.228175] ? __pfx_mmap_region+0x10/0x10 [ 31.228751] ? security_mmap_addr+0x7d/0xa0 [ 31.229342] ? get_unmapped_area+0x1f5/0x3f0 [ 31.229954] do_mmap+0x854/0xf00 [ 31.230427] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.230992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.231612] ksys_mmap_pgoff+0x3af/0x500 [ 31.232180] do_syscall_64+0x3f/0x90 [ 31.232702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233424] RIP: 0033:0x7f91b5ce1d82 [ 31.233928] 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 [ 31.236322] RSP: 002b:00007fffd4737dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.237353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91b5ce1d82 [ 31.238311] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91b511b000 [ 31.239257] RBP: 00007f91b511b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.240215] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572a0e42f70 [ 31.241146] R13: 00007fffd4737de0 R14: 00007fffd4737e10 R15: 00007fffd4738170 [ 31.242093] [ 31.242412] [ 31.242646] Allocated by task 213: [ 31.243137] kasan_save_stack+0x22/0x50 [ 31.243704] kasan_set_track+0x25/0x30 [ 31.244252] __kasan_slab_alloc+0x59/0x70 [ 31.244863] kmem_cache_alloc+0x16b/0x370 [ 31.245443] vm_area_dup+0x20/0x160 [ 31.245966] __split_vma+0x170/0x950 [ 31.246472] split_vma+0xc6/0x110 [ 31.246967] mprotect_fixup+0x8d2/0xb30 [ 31.247552] do_mprotect_pkey+0x87e/0xd40 [ 31.248139] __x64_sys_mprotect+0x78/0xc0 [ 31.248706] do_syscall_64+0x3f/0x90 [ 31.249227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249938] [ 31.250168] Freed by task 213: [ 31.250583] kasan_save_stack+0x22/0x50 [ 31.251162] kasan_set_track+0x25/0x30 [ 31.251728] kasan_save_free_info+0x2b/0x50 [ 31.252318] __kasan_slab_free+0x10a/0x190 [ 31.252920] kmem_cache_free+0x10d/0x4d0 [ 31.253480] rcu_core+0x8c8/0x2860 [ 31.253975] __do_softirq+0x1b7/0x7d4 [ 31.254489] [ 31.254719] Last potentially related work creation: [ 31.255382] kasan_save_stack+0x22/0x50 [ 31.255963] __kasan_record_aux_stack+0x8e/0xa0 [ 31.256583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.257286] remove_vma+0x139/0x170 [ 31.257777] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.258393] do_vmi_munmap+0x1f1/0x2b0 [ 31.258944] __vm_munmap+0x138/0x3a0 [ 31.259462] __x64_sys_munmap+0x59/0x80 [ 31.260012] do_syscall_64+0x3f/0x90 [ 31.260520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261229] [ 31.261461] The buggy address belongs to the object at ffff88800d50fcb0 [ 31.261461] which belongs to the cache vm_area_struct of size 168 [ 31.263075] The buggy address is located 88 bytes inside of [ 31.263075] freed 168-byte region [ffff88800d50fcb0, ffff88800d50fd58) [ 31.264607] [ 31.264862] The buggy address belongs to the physical page: [ 31.265810] page:000000005b3aa86f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd50f [ 31.267028] memcg:ffff88800d22b701 [ 31.267515] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.268288] page_type: 0xffffffff() [ 31.268773] raw: 0100000000000200 ffff8880087a0c80 ffffea0000373580 dead000000000003 [ 31.269763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d22b701 [ 31.270788] page dumped because: kasan: bad access detected [ 31.271552] [ 31.271795] Memory state around the buggy address: [ 31.272474] ffff88800d50fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.273445] ffff88800d50fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.274416] >ffff88800d50fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.275379] ^ [ 31.275894] ffff88800d50fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.276881] ffff88800d50fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.277846] ================================================================== [ 31.279006] Disabling lock debugging due to kernel taint [ 34.092045] BUG: Bad rss-counter state mm:0000000073fadf5f type:MM_FILEPAGES val:33 [ 34.093035] BUG: Bad rss-counter state mm:0000000073fadf5f type:MM_ANONPAGES val:22 [ 34.566961] BUG: Bad rss-counter state mm:00000000ca5e2818 type:MM_FILEPAGES val:33 [ 34.568005] BUG: Bad rss-counter state mm:00000000ca5e2818 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10849' (ECDSA) to the list of known hosts. 2023/06/20 15:34:26 fuzzer started 2023/06/20 15:34:27 dialing manager at localhost:36067 2023/06/20 15:34:27 checking machine... 2023/06/20 15:34:27 checking revisions... [ 35.300579] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:34:27 testing simple program... [ 35.354780] cgroup: Unknown subsys name 'net' [ 35.395240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:34:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018f0adc0 RCX=0000000000000003 RDX=0000000000000020 RSI=0000000000000000 RDI=ffff88801a822cc0 RBP=0000000000000000 RSP=ffff88800f7278c0 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88801a822cc0 R11=00000000000b6a61 R12=ffff88801a822ce0 R13=ffff88801a822cc0 R14=0000000000400cc0 R15=ffff888008fae000 RIP=ffffffff84513442 RFL=00000206 [-----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 00007fc497aa3900 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=00007fc498058650 CR3=0000000009bec000 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=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=00007fffcd0ca7d8 CR3=0000000015c96000 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=2036323a34333a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000