syzkaller login: [ 32.653553] BUG: Bad rss-counter state mm:0000000012fefb4a type:MM_FILEPAGES val:33 [ 32.654605] BUG: Bad rss-counter state mm:0000000012fefb4a type:MM_ANONPAGES val:22 [ 32.814413] ================================================================== [ 32.815522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.816654] Read of size 8 at addr ffff888015e7adf0 by task sshd/220 [ 32.817697] [ 32.817959] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.818986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.820143] Call Trace: [ 32.820521] [ 32.820906] dump_stack_lvl+0x91/0xf0 [ 32.821491] print_report+0xcc/0x620 [ 32.822016] ? __virt_addr_valid+0x102/0x340 [ 32.822582] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.823207] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.823829] kasan_report+0xbe/0xf0 [ 32.824325] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.824987] vma_interval_tree_remove+0xc75/0xec0 [ 32.825603] vma_prepare+0xc54/0x11a0 [ 32.826090] __split_vma+0x5af/0x950 [ 32.826564] ? __pfx___split_vma+0x10/0x10 [ 32.827105] ? find_held_lock+0x2c/0x110 [ 32.827628] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.828209] ? lock_is_held_type+0x9f/0x120 [ 32.828777] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.829406] ? mtree_range_walk+0x632/0x900 [ 32.829973] ? mas_walk+0x5c7/0x7c0 [ 32.830457] do_vmi_munmap+0x1f1/0x2b0 [ 32.830965] mmap_region+0x1f9/0x2660 [ 32.831463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.831982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.832726] ? __pfx_lock_acquire+0x10/0x10 [ 32.833262] ? __pfx_mmap_region+0x10/0x10 [ 32.833805] ? security_mmap_addr+0x7d/0xa0 [ 32.834345] ? get_unmapped_area+0x1f5/0x3f0 [ 32.834909] do_mmap+0x854/0xf00 [ 32.835365] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.835875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.836451] ksys_mmap_pgoff+0x3af/0x500 [ 32.836990] do_syscall_64+0x3f/0x90 [ 32.837479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.838137] RIP: 0033:0x7efe08ca0d82 [ 32.838609] 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 [ 32.840816] RSP: 002b:00007ffd062a8748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.841735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe08ca0d82 [ 32.842605] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe080da000 [ 32.843494] RBP: 00007efe080da000 R08: 0000000000000009 R09: 0000000000001000 [ 32.844359] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ac2784ec0 [ 32.845239] R13: 00007ffd062a8760 R14: 00007ffd062a8790 R15: 00007ffd062a8af0 [ 32.846108] [ 32.846409] [ 32.846635] Allocated by task 213: [ 32.847073] kasan_save_stack+0x22/0x50 [ 32.847584] kasan_set_track+0x25/0x30 [ 32.848080] __kasan_slab_alloc+0x59/0x70 [ 32.848612] kmem_cache_alloc+0x16b/0x370 [ 32.849160] vm_area_dup+0x20/0x160 [ 32.849629] __split_vma+0x170/0x950 [ 32.850103] split_vma+0xc6/0x110 [ 32.850550] mprotect_fixup+0x8d2/0xb30 [ 32.851067] do_mprotect_pkey+0x87e/0xd40 [ 32.851601] __x64_sys_mprotect+0x78/0xc0 [ 32.852138] do_syscall_64+0x3f/0x90 [ 32.852625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.853301] [ 32.853518] Freed by task 213: [ 32.853923] kasan_save_stack+0x22/0x50 [ 32.854443] kasan_set_track+0x25/0x30 [ 32.854955] kasan_save_free_info+0x2b/0x50 [ 32.855495] __kasan_slab_free+0x10a/0x190 [ 32.856029] kmem_cache_free+0x10d/0x4d0 [ 32.856552] rcu_core+0x8c8/0x2860 [ 32.857013] __do_softirq+0x1b7/0x7d4 [ 32.857496] [ 32.857718] Last potentially related work creation: [ 32.858408] kasan_save_stack+0x22/0x50 [ 32.858923] __kasan_record_aux_stack+0x8e/0xa0 [ 32.859520] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.860172] remove_vma+0x139/0x170 [ 32.860647] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.861216] do_vmi_munmap+0x1f1/0x2b0 [ 32.861716] __vm_munmap+0x138/0x3a0 [ 32.862201] __x64_sys_munmap+0x59/0x80 [ 32.862713] do_syscall_64+0x3f/0x90 [ 32.863189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.863832] [ 32.864055] The buggy address belongs to the object at ffff888015e7ad98 [ 32.864055] which belongs to the cache vm_area_struct of size 168 [ 32.865548] The buggy address is located 88 bytes inside of [ 32.865548] freed 168-byte region [ffff888015e7ad98, ffff888015e7ae40) [ 32.867046] [ 32.867278] The buggy address belongs to the physical page: [ 32.867963] page:000000002582e412 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e7a [ 32.869105] memcg:ffff88800d862601 [ 32.869554] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.870226] page_type: 0xffffffff() [ 32.870703] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.871666] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d862601 [ 32.872588] page dumped because: kasan: bad access detected [ 32.873286] [ 32.873503] Memory state around the buggy address: [ 32.874098] ffff888015e7ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.874966] ffff888015e7ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.875830] >ffff888015e7ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.876754] ^ [ 32.877593] ffff888015e7ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.878472] ffff888015e7ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.879334] ================================================================== [ 32.880497] Disabling lock debugging due to kernel taint [ 34.907156] BUG: Bad rss-counter state mm:00000000d7cedf4a type:MM_FILEPAGES val:33 [ 34.908260] BUG: Bad rss-counter state mm:00000000d7cedf4a type:MM_ANONPAGES val:22 [ 35.421689] BUG: Bad rss-counter state mm:0000000013b5ffbb type:MM_FILEPAGES val:33 [ 35.422881] BUG: Bad rss-counter state mm:0000000013b5ffbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5650' (ECDSA) to the list of known hosts. 2023/06/19 15:09:07 fuzzer started 2023/06/19 15:09:07 dialing manager at localhost:44161 2023/06/19 15:09:07 checking machine... 2023/06/19 15:09:07 checking revisions... [ 36.032965] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:09:08 testing simple program... [ 36.085187] cgroup: Unknown subsys name 'net' [ 36.131496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:09:06 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800d1bc260 RCX=ffff88800d1bc260 RDX=00000000000d000d RSI=ffff88800d1bc260 RDI=ffff88800844f780 RBP=ffff88800d9775a8 RSP=ffff88800d977510 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000346f00 R11=0000000000000000 R12=ffffea0000346f00 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007f3a26be2900 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=0000561574c9d748 CR3=000000000c94c000 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=bf38481728db30b300000000000ae988 XMM05=17c932e3241533050000000000134e58 XMM06=d3124f26f3c3cb290000000000133f00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000001f RBX=000000000000001f RCX=0000561574c9ee8f RDX=000000000000001f RSI=0000561574c9ee70 RDI=0000561574c89750 RBP=0000561574c89750 RSP=00007ffe7b2c3fb8 R8 =0000000000000008 R9 =00007ff9e90b2be0 R10=0000000000000008 R11=0000000000000246 R12=0000561574c90f70 R13=00007ff9e8b006f8 R14=0000000000000400 R15=0000000000000400 RIP=00007ff9e8f28ab0 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff9e8b00900 00000000 00000000 GS =0000 0000000000000000 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=00007ff9e90b80b0 CR3=0000000016f14000 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=2f3a746f6f723a303a303a3a746f6f72 XMM01=0a687361622f6e69622f3a746f6f722f XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000