syzkaller login: [ 30.567445] BUG: Bad rss-counter state mm:00000000cae5a89f type:MM_FILEPAGES val:33 [ 30.568470] BUG: Bad rss-counter state mm:00000000cae5a89f type:MM_ANONPAGES val:22 [ 30.725636] ================================================================== [ 30.726540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.727476] Read of size 8 at addr ffff88800e8d65c8 by task sshd/220 [ 30.728235] [ 30.728452] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.729482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.730491] Call Trace: [ 30.730816] [ 30.731096] dump_stack_lvl+0x91/0xf0 [ 30.731608] print_report+0xcc/0x620 [ 30.732109] ? __virt_addr_valid+0x102/0x340 [ 30.732668] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733283] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733898] kasan_report+0xbe/0xf0 [ 30.734385] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735002] vma_interval_tree_remove+0xc75/0xec0 [ 30.735605] vma_prepare+0xc54/0x11a0 [ 30.736088] __split_vma+0x5af/0x950 [ 30.736558] ? __pfx___split_vma+0x10/0x10 [ 30.737090] ? find_held_lock+0x2c/0x110 [ 30.737620] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.738197] ? lock_is_held_type+0x9f/0x120 [ 30.738740] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.739349] ? mtree_range_walk+0x632/0x900 [ 30.739905] ? mas_walk+0x5c7/0x7c0 [ 30.740387] do_vmi_munmap+0x1f1/0x2b0 [ 30.740884] mmap_region+0x1f9/0x2660 [ 30.741372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.741898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.742619] ? __pfx_lock_acquire+0x10/0x10 [ 30.743157] ? __pfx_mmap_region+0x10/0x10 [ 30.743701] ? security_mmap_addr+0x7d/0xa0 [ 30.744244] ? get_unmapped_area+0x1f5/0x3f0 [ 30.744806] do_mmap+0x854/0xf00 [ 30.745241] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.745743] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746311] ksys_mmap_pgoff+0x3af/0x500 [ 30.746826] do_syscall_64+0x3f/0x90 [ 30.747303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747957] RIP: 0033:0x7f5af7b7fd82 [ 30.748411] 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 [ 30.750555] RSP: 002b:00007ffecfbdc838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.751465] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5af7b7fd82 [ 30.752307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5af6fb9000 [ 30.753154] RBP: 00007f5af6fb9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.754026] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c453197ec0 [ 30.754868] R13: 00007ffecfbdc850 R14: 00007ffecfbdc880 R15: 00007ffecfbdcbe0 [ 30.755730] [ 30.756027] [ 30.756242] Allocated by task 213: [ 30.756669] kasan_save_stack+0x22/0x50 [ 30.757174] kasan_set_track+0x25/0x30 [ 30.757669] __kasan_slab_alloc+0x59/0x70 [ 30.758202] kmem_cache_alloc+0x16b/0x370 [ 30.758717] vm_area_dup+0x20/0x160 [ 30.759169] __split_vma+0x170/0x950 [ 30.759632] split_vma+0xc6/0x110 [ 30.760069] mprotect_fixup+0x8d2/0xb30 [ 30.760571] do_mprotect_pkey+0x87e/0xd40 [ 30.761102] __x64_sys_mprotect+0x78/0xc0 [ 30.761642] do_syscall_64+0x3f/0x90 [ 30.762117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762755] [ 30.762971] Freed by task 19: [ 30.763356] kasan_save_stack+0x22/0x50 [ 30.763856] kasan_set_track+0x25/0x30 [ 30.764350] kasan_save_free_info+0x2b/0x50 [ 30.764888] __kasan_slab_free+0x10a/0x190 [ 30.765423] kmem_cache_free+0x10d/0x4d0 [ 30.765937] rcu_core+0x8c8/0x2860 [ 30.766378] __do_softirq+0x1b7/0x7d4 [ 30.766864] [ 30.767078] Last potentially related work creation: [ 30.767665] kasan_save_stack+0x22/0x50 [ 30.768169] __kasan_record_aux_stack+0x8e/0xa0 [ 30.768742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.769383] remove_vma+0x139/0x170 [ 30.769840] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.770451] do_vmi_munmap+0x1f1/0x2b0 [ 30.770943] __vm_munmap+0x138/0x3a0 [ 30.771404] __x64_sys_munmap+0x59/0x80 [ 30.771898] do_syscall_64+0x3f/0x90 [ 30.772374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773018] [ 30.773232] The buggy address belongs to the object at ffff88800e8d6570 [ 30.773232] which belongs to the cache vm_area_struct of size 168 [ 30.774718] The buggy address is located 88 bytes inside of [ 30.774718] freed 168-byte region [ffff88800e8d6570, ffff88800e8d6618) [ 30.776118] [ 30.776330] The buggy address belongs to the physical page: [ 30.776987] page:00000000743fef39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8d6 [ 30.778085] memcg:ffff88800ed4ee01 [ 30.778510] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.779157] page_type: 0xffffffff() [ 30.779616] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b6ac0 dead000000000002 [ 30.780545] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed4ee01 [ 30.781456] page dumped because: kasan: bad access detected [ 30.782126] [ 30.782340] Memory state around the buggy address: [ 30.782927] ffff88800e8d6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.783783] ffff88800e8d6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.784635] >ffff88800e8d6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.785481] ^ [ 30.786163] ffff88800e8d6600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.787028] ffff88800e8d6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.787881] ================================================================== [ 30.788803] Disabling lock debugging due to kernel taint [ 32.719684] BUG: Bad rss-counter state mm:000000001e077508 type:MM_FILEPAGES val:33 [ 32.720928] BUG: Bad rss-counter state mm:000000001e077508 type:MM_ANONPAGES val:22 [ 33.287872] BUG: Bad rss-counter state mm:000000001f3115c6 type:MM_FILEPAGES val:33 [ 33.289071] BUG: Bad rss-counter state mm:000000001f3115c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8461' (ECDSA) to the list of known hosts. 2023/06/20 19:30:41 fuzzer started 2023/06/20 19:30:41 dialing manager at localhost:36067 2023/06/20 19:30:42 checking machine... 2023/06/20 19:30:42 checking revisions... [ 33.938276] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:30:42 testing simple program... [ 33.980254] cgroup: Unknown subsys name 'net' [ 34.021153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:30:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800e8e7930 RSP=ffff88800e8e7868 R8 =ffffffff864b2030 R9 =ffff88800e8e7918 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800e8e7938 R13=ffff88800e8e7920 R14=ffff88800e8e7f58 R15=ffff88800e8e78d8 RIP=ffffffff81131151 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 00007fe79eb2c900 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=00007fe79f0e40b0 CR3=00000000068ba000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f98fa593bd0 CR3=000000000c6d4000 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=2031343a30333a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30333a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000