syzkaller login: [ 30.785997] BUG: Bad rss-counter state mm:00000000845490de type:MM_FILEPAGES val:33 [ 30.787472] BUG: Bad rss-counter state mm:00000000845490de type:MM_ANONPAGES val:22 [ 30.953371] ================================================================== [ 30.954323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.955263] Read of size 8 at addr ffff88800d80d4e0 by task sshd/219 [ 30.956028] [ 30.956252] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.957130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.958128] Call Trace: [ 30.958454] [ 30.958741] dump_stack_lvl+0x91/0xf0 [ 30.959236] print_report+0xcc/0x620 [ 30.959728] ? __virt_addr_valid+0x102/0x340 [ 30.960277] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.960900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961527] kasan_report+0xbe/0xf0 [ 30.962017] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.962642] vma_interval_tree_remove+0xc75/0xec0 [ 30.963253] vma_prepare+0xc54/0x11a0 [ 30.963737] __split_vma+0x5af/0x950 [ 30.964209] ? __pfx___split_vma+0x10/0x10 [ 30.964746] ? find_held_lock+0x2c/0x110 [ 30.965273] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.965871] ? lock_is_held_type+0x9f/0x120 [ 30.966418] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.967040] ? mtree_range_walk+0x632/0x900 [ 30.967603] ? mas_walk+0x5c7/0x7c0 [ 30.968092] do_vmi_munmap+0x1f1/0x2b0 [ 30.968596] mmap_region+0x1f9/0x2660 [ 30.969083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.969595] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.970321] ? __pfx_lock_acquire+0x10/0x10 [ 30.970858] ? __pfx_mmap_region+0x10/0x10 [ 30.971397] ? security_mmap_addr+0x7d/0xa0 [ 30.971932] ? get_unmapped_area+0x1f5/0x3f0 [ 30.972488] do_mmap+0x854/0xf00 [ 30.972934] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.973444] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.974029] ksys_mmap_pgoff+0x3af/0x500 [ 30.974544] do_syscall_64+0x3f/0x90 [ 30.975032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975679] RIP: 0033:0x7fb5d708fd82 [ 30.976144] 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 [ 30.978301] RSP: 002b:00007ffc478f8488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.979216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5d708fd82 [ 30.980074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5d64c9000 [ 30.980933] RBP: 00007fb5d64c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.982046] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f74f106f70 [ 30.982894] R13: 00007ffc478f84a0 R14: 00007ffc478f84d0 R15: 00007ffc478f8830 [ 30.983775] [ 30.984073] [ 30.984294] Allocated by task 212: [ 30.984727] kasan_save_stack+0x22/0x50 [ 30.985249] kasan_set_track+0x25/0x30 [ 30.985759] __kasan_slab_alloc+0x59/0x70 [ 30.986290] kmem_cache_alloc+0x16b/0x370 [ 30.986808] vm_area_dup+0x20/0x160 [ 30.987273] __split_vma+0x170/0x950 [ 30.987737] split_vma+0xc6/0x110 [ 30.988183] mprotect_fixup+0x8d2/0xb30 [ 30.988687] do_mprotect_pkey+0x87e/0xd40 [ 30.989220] __x64_sys_mprotect+0x78/0xc0 [ 30.989751] do_syscall_64+0x3f/0x90 [ 30.990235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.990884] [ 30.991103] Freed by task 212: [ 30.991495] kasan_save_stack+0x22/0x50 [ 30.992007] kasan_set_track+0x25/0x30 [ 30.992507] kasan_save_free_info+0x2b/0x50 [ 30.993042] __kasan_slab_free+0x10a/0x190 [ 30.993581] kmem_cache_free+0x10d/0x4d0 [ 30.994113] rcu_core+0x8c8/0x2860 [ 30.994564] __do_softirq+0x1b7/0x7d4 [ 30.995056] [ 30.995275] Last potentially related work creation: [ 30.995862] kasan_save_stack+0x22/0x50 [ 30.996369] __kasan_record_aux_stack+0x8e/0xa0 [ 30.996944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.997598] remove_vma+0x139/0x170 [ 30.998064] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.998626] do_vmi_munmap+0x1f1/0x2b0 [ 30.999124] __vm_munmap+0x138/0x3a0 [ 30.999597] __x64_sys_munmap+0x59/0x80 [ 31.000106] do_syscall_64+0x3f/0x90 [ 31.000584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.001235] [ 31.001448] The buggy address belongs to the object at ffff88800d80d488 [ 31.001448] which belongs to the cache vm_area_struct of size 168 [ 31.002946] The buggy address is located 88 bytes inside of [ 31.002946] freed 168-byte region [ffff88800d80d488, ffff88800d80d530) [ 31.004366] [ 31.004584] The buggy address belongs to the physical page: [ 31.005247] page:00000000d341280e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd80d [ 31.006338] memcg:ffff888009f8bc01 [ 31.006770] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.007417] page_type: 0xffffffff() [ 31.007865] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.008788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009f8bc01 [ 31.009710] page dumped because: kasan: bad access detected [ 31.010372] [ 31.010594] Memory state around the buggy address: [ 31.011181] ffff88800d80d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.012041] ffff88800d80d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.012890] >ffff88800d80d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.013758] ^ [ 31.014518] ffff88800d80d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.015375] ffff88800d80d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.016227] ================================================================== [ 31.017195] Disabling lock debugging due to kernel taint [ 33.051470] BUG: Bad rss-counter state mm:000000004652064c type:MM_FILEPAGES val:33 [ 33.052498] BUG: Bad rss-counter state mm:000000004652064c type:MM_ANONPAGES val:22 [ 33.624206] BUG: Bad rss-counter state mm:0000000045e542bb type:MM_FILEPAGES val:33 [ 33.625391] BUG: Bad rss-counter state mm:0000000045e542bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4104' (ECDSA) to the list of known hosts. 2023/06/21 06:03:16 fuzzer started 2023/06/21 06:03:16 dialing manager at localhost:36067 2023/06/21 06:03:17 checking machine... 2023/06/21 06:03:17 checking revisions... [ 34.275344] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:03:17 testing simple program... [ 34.320461] cgroup: Unknown subsys name 'net' [ 34.357389] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:16 Registers: info registers vcpu 0 RAX=ffffea000068b300 RBX=ffff88801a2cc980 RCX=ffff88800844f780 RDX=ffff88809a2cc980 RSI=ffff88800ed8c000 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff8880147b7c78 R8 =ffff88801a2cc980 R9 =0000000000000000 R10=ffffea00003b6300 R11=00000000000d000b R12=dffffc0000000000 R13=ffff8880147b7cb8 R14=0000000000000000 R15=ffff88800ed8c000 RIP=ffffffff81810393 RFL=00000286 [--S--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 00007f62a0c83900 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=00007f62a00d1210 CR3=0000000013a3c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f20fe6fa4f472ba400000000000ae988 XMM05=ce3706b3d84a633700000000001329c8 XMM06=019af355868dc9730000000000131768 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c7bc15 RBX=0000000000000001 RCX=ffffffff863de0a6 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88801cde71c0 RBP=ffff88801cde71b0 RSP=ffff88801cde70e8 R8 =ffffffff863de0aa R9 =ffff88801cde7198 R10=0000000000038001 R11=0000000000091b45 R12=ffff88801cde71b8 R13=ffff88801cde71a0 R14=ffff88801cde7890 R15=ffff88801cde7158 RIP=ffffffff81131118 RFL=00000212 [----A--] 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 00007fb7366d1900 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=00007ffebc0cc000 CR3=000000000eac4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000