syzkaller login: [ 26.393130] BUG: Bad rss-counter state mm:000000000104515c type:MM_FILEPAGES val:33 [ 26.394566] BUG: Bad rss-counter state mm:000000000104515c type:MM_ANONPAGES val:22 [ 26.545040] ================================================================== [ 26.546124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.547338] Read of size 8 at addr ffff88800ee03c20 by task sshd/220 [ 26.548192] [ 26.548426] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.549357] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.550389] Call Trace: [ 26.550728] [ 26.551031] dump_stack_lvl+0x91/0xf0 [ 26.551551] print_report+0xcc/0x620 [ 26.552070] ? __virt_addr_valid+0x102/0x340 [ 26.552669] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.553328] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.553977] kasan_report+0xbe/0xf0 [ 26.554483] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.555155] vma_interval_tree_remove+0xc75/0xec0 [ 26.555798] vma_prepare+0xc54/0x11a0 [ 26.556322] __split_vma+0x5af/0x950 [ 26.556824] ? __pfx___split_vma+0x10/0x10 [ 26.557385] ? find_held_lock+0x2c/0x110 [ 26.557933] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.558530] ? lock_is_held_type+0x9f/0x120 [ 26.559100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.559742] ? mtree_range_walk+0x632/0x900 [ 26.560335] ? mas_walk+0x5c7/0x7c0 [ 26.560839] do_vmi_munmap+0x1f1/0x2b0 [ 26.561362] mmap_region+0x1f9/0x2660 [ 26.561879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.562425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.563195] ? __pfx_lock_acquire+0x10/0x10 [ 26.563759] ? __pfx_mmap_region+0x10/0x10 [ 26.564334] ? security_mmap_addr+0x7d/0xa0 [ 26.564899] ? get_unmapped_area+0x1f5/0x3f0 [ 26.565481] do_mmap+0x854/0xf00 [ 26.565961] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.566484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.567101] ksys_mmap_pgoff+0x3af/0x500 [ 26.567641] do_syscall_64+0x3f/0x90 [ 26.568146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.568846] RIP: 0033:0x7fdfa99fdd82 [ 26.569349] 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 [ 26.571622] RSP: 002b:00007ffef073a738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.572600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfa99fdd82 [ 26.573506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfa8e37000 [ 26.574409] RBP: 00007fdfa8e37000 R08: 0000000000000009 R09: 0000000000001000 [ 26.575309] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbee413ec0 [ 26.576220] R13: 00007ffef073a750 R14: 00007ffef073a780 R15: 00007ffef073aae0 [ 26.577130] [ 26.577438] [ 26.577666] Allocated by task 213: [ 26.578121] kasan_save_stack+0x22/0x50 [ 26.578659] kasan_set_track+0x25/0x30 [ 26.579186] __kasan_slab_alloc+0x59/0x70 [ 26.579743] kmem_cache_alloc+0x16b/0x370 [ 26.580341] vm_area_dup+0x20/0x160 [ 26.580823] __split_vma+0x170/0x950 [ 26.581322] split_vma+0xc6/0x110 [ 26.581795] mprotect_fixup+0x8d2/0xb30 [ 26.582326] do_mprotect_pkey+0x87e/0xd40 [ 26.582885] __x64_sys_mprotect+0x78/0xc0 [ 26.583440] do_syscall_64+0x3f/0x90 [ 26.583949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.584651] [ 26.584886] Freed by task 213: [ 26.585305] kasan_save_stack+0x22/0x50 [ 26.585850] kasan_set_track+0x25/0x30 [ 26.586373] kasan_save_free_info+0x2b/0x50 [ 26.586953] __kasan_slab_free+0x10a/0x190 [ 26.587522] kmem_cache_free+0x10d/0x4d0 [ 26.588066] rcu_core+0x8c8/0x2860 [ 26.588547] __do_softirq+0x1b7/0x7d4 [ 26.589062] [ 26.589290] Last potentially related work creation: [ 26.589920] kasan_save_stack+0x22/0x50 [ 26.590457] __kasan_record_aux_stack+0x8e/0xa0 [ 26.591078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.591766] remove_vma+0x139/0x170 [ 26.592263] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.592860] do_vmi_munmap+0x1f1/0x2b0 [ 26.593376] __vm_munmap+0x138/0x3a0 [ 26.593884] __x64_sys_munmap+0x59/0x80 [ 26.594414] do_syscall_64+0x3f/0x90 [ 26.594925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.595608] [ 26.595849] The buggy address belongs to the object at ffff88800ee03bc8 [ 26.595849] which belongs to the cache vm_area_struct of size 168 [ 26.597439] The buggy address is located 88 bytes inside of [ 26.597439] freed 168-byte region [ffff88800ee03bc8, ffff88800ee03c70) [ 26.598964] [ 26.599194] The buggy address belongs to the physical page: [ 26.599893] page:0000000074bbb1b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee03 [ 26.601044] memcg:ffff88800e34d301 [ 26.601494] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.602236] page_type: 0xffffffff() [ 26.602713] raw: 0100000000000200 ffff88800879fc80 ffffea00003af040 0000000000000003 [ 26.603683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e34d301 [ 26.604668] page dumped because: kasan: bad access detected [ 26.605375] [ 26.605602] Memory state around the buggy address: [ 26.606229] ffff88800ee03b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.607139] ffff88800ee03b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 26.608047] >ffff88800ee03c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 26.608956] ^ [ 26.609512] ffff88800ee03c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 26.610420] ffff88800ee03d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 26.611323] ================================================================== [ 26.612703] Disabling lock debugging due to kernel taint [ 29.171224] BUG: Bad rss-counter state mm:0000000009f4ae73 type:MM_FILEPAGES val:33 [ 29.172245] BUG: Bad rss-counter state mm:0000000009f4ae73 type:MM_ANONPAGES val:22 [ 29.676709] BUG: Bad rss-counter state mm:0000000053447a99 type:MM_FILEPAGES val:33 [ 29.677807] BUG: Bad rss-counter state mm:0000000053447a99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25195' (ECDSA) to the list of known hosts. 2023/06/19 14:52:34 fuzzer started 2023/06/19 14:52:34 dialing manager at localhost:44161 2023/06/19 14:52:34 checking machine... 2023/06/19 14:52:34 checking revisions... [ 30.432895] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:52:34 testing simple program... [ 30.466971] cgroup: Unknown subsys name 'net' [ 30.501464] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:52:31 Registers: info registers vcpu 0 RAX=1ffffffff0bfc6e8 RBX=ffffffff85fe3740 RCX=ffffffff83c18b33 RDX=0000000000000000 RSI=ffffffff864118ee RDI=ffffffff85fe3740 RBP=ffffffff85fe3740 RSP=ffff88800f46f908 R8 =ffffffff864118ee R9 =ffff88800f46fa00 R10=0000000000038001 R11=000000000009a8db R12=ffffffff85fe3740 R13=ffffffff85fe3740 R14=ffffffff85fe3740 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007fbb5c6fc900 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=00007fbb5ccb1650 CR3=000000001beee000 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=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=0000560eab5ed000 CR3=000000000c680000 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=32353a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343432 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000