syzkaller login: [ 32.170488] BUG: Bad rss-counter state mm:000000006c30b1bd type:MM_FILEPAGES val:33 [ 32.171540] BUG: Bad rss-counter state mm:000000006c30b1bd type:MM_ANONPAGES val:22 [ 32.357533] ================================================================== [ 32.358453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.359399] Read of size 8 at addr ffff88800c997ed8 by task sshd/220 [ 32.360182] [ 32.360577] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.361439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.362416] Call Trace: [ 32.362736] [ 32.363023] dump_stack_lvl+0x91/0xf0 [ 32.363518] print_report+0xcc/0x620 [ 32.364010] ? __virt_addr_valid+0x102/0x340 [ 32.364586] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.365218] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.365836] kasan_report+0xbe/0xf0 [ 32.366309] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.366936] vma_interval_tree_remove+0xc75/0xec0 [ 32.367542] vma_prepare+0xc54/0x11a0 [ 32.368026] __split_vma+0x5af/0x950 [ 32.368510] ? __pfx___split_vma+0x10/0x10 [ 32.369034] ? find_held_lock+0x2c/0x110 [ 32.369552] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.370120] ? lock_is_held_type+0x9f/0x120 [ 32.370662] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.371273] ? mtree_range_walk+0x632/0x900 [ 32.371829] ? mas_walk+0x5c7/0x7c0 [ 32.372312] do_vmi_munmap+0x1f1/0x2b0 [ 32.372817] mmap_region+0x1f9/0x2660 [ 32.373309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.373822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.374534] ? __pfx_lock_acquire+0x10/0x10 [ 32.375074] ? __pfx_mmap_region+0x10/0x10 [ 32.375609] ? security_mmap_addr+0x7d/0xa0 [ 32.376151] ? get_unmapped_area+0x1f5/0x3f0 [ 32.376724] do_mmap+0x854/0xf00 [ 32.377174] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.377688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.378257] ksys_mmap_pgoff+0x3af/0x500 [ 32.378779] do_syscall_64+0x3f/0x90 [ 32.379293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.379953] RIP: 0033:0x7ff1b6bf3d82 [ 32.380433] 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 [ 32.382598] RSP: 002b:00007ffd13c171f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.383526] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1b6bf3d82 [ 32.384398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1b602d000 [ 32.385246] RBP: 00007ff1b602d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.386096] R10: 0000000000000812 R11: 0000000000000206 R12: 000056423ced5b20 [ 32.386939] R13: 00007ffd13c17210 R14: 00007ffd13c17240 R15: 00007ffd13c175a0 [ 32.387797] [ 32.388097] [ 32.388321] Allocated by task 213: [ 32.388753] kasan_save_stack+0x22/0x50 [ 32.389260] kasan_set_track+0x25/0x30 [ 32.389760] __kasan_slab_alloc+0x59/0x70 [ 32.390285] kmem_cache_alloc+0x16b/0x370 [ 32.390804] vm_area_dup+0x20/0x160 [ 32.391260] __split_vma+0x170/0x950 [ 32.391726] split_vma+0xc6/0x110 [ 32.392170] mprotect_fixup+0x8d2/0xb30 [ 32.392695] do_mprotect_pkey+0x87e/0xd40 [ 32.393223] __x64_sys_mprotect+0x78/0xc0 [ 32.393747] do_syscall_64+0x3f/0x90 [ 32.394238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.394904] [ 32.395122] Freed by task 213: [ 32.395533] kasan_save_stack+0x22/0x50 [ 32.396044] kasan_set_track+0x25/0x30 [ 32.396548] kasan_save_free_info+0x2b/0x50 [ 32.397098] __kasan_slab_free+0x10a/0x190 [ 32.397650] kmem_cache_free+0x10d/0x4d0 [ 32.398167] rcu_core+0x8c8/0x2860 [ 32.398637] __do_softirq+0x1b7/0x7d4 [ 32.399146] [ 32.399364] Last potentially related work creation: [ 32.399957] kasan_save_stack+0x22/0x50 [ 32.400474] __kasan_record_aux_stack+0x8e/0xa0 [ 32.401047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.401689] remove_vma+0x139/0x170 [ 32.402142] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.402703] do_vmi_munmap+0x1f1/0x2b0 [ 32.403190] __vm_munmap+0x138/0x3a0 [ 32.403657] __x64_sys_munmap+0x59/0x80 [ 32.404158] do_syscall_64+0x3f/0x90 [ 32.404664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.405331] [ 32.405554] The buggy address belongs to the object at ffff88800c997e80 [ 32.405554] which belongs to the cache vm_area_struct of size 168 [ 32.407097] The buggy address is located 88 bytes inside of [ 32.407097] freed 168-byte region [ffff88800c997e80, ffff88800c997f28) [ 32.408578] [ 32.408807] The buggy address belongs to the physical page: [ 32.409503] page:00000000062df4ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc997 [ 32.410590] memcg:ffff88800ea80f01 [ 32.411025] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.411706] page_type: 0xffffffff() [ 32.412182] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.413128] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea80f01 [ 32.414064] page dumped because: kasan: bad access detected [ 32.414730] [ 32.414949] Memory state around the buggy address: [ 32.415558] ffff88800c997d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.416464] ffff88800c997e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.417335] >ffff88800c997e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.418201] ^ [ 32.418951] ffff88800c997f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.419831] ffff88800c997f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.420688] ================================================================== [ 32.421734] Disabling lock debugging due to kernel taint [ 34.361148] BUG: Bad rss-counter state mm:00000000e41a441a type:MM_FILEPAGES val:33 [ 34.362058] BUG: Bad rss-counter state mm:00000000e41a441a type:MM_ANONPAGES val:22 [ 34.810789] BUG: Bad rss-counter state mm:000000009e7665c6 type:MM_FILEPAGES val:33 [ 34.812465] BUG: Bad rss-counter state mm:000000009e7665c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39665' (ECDSA) to the list of known hosts. 2023/06/20 21:10:31 fuzzer started 2023/06/20 21:10:31 dialing manager at localhost:36067 2023/06/20 21:10:31 checking machine... 2023/06/20 21:10:31 checking revisions... [ 35.552062] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:10:31 testing simple program... [ 35.598719] cgroup: Unknown subsys name 'net' [ 35.648772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:10:31 Registers: info registers vcpu 0 RAX=0000000600000001 RBX=ffff888008dfc0d8 RCX=0000000000000000 RDX=1ffff110039b0f87 RSI=0000000600000001 RDI=0000000600000001 RBP=dffffc0000000000 RSP=ffff88801cd87970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000001371c348 R13=0000000600000001 R14=ffff88801cd87c38 R15=0000000000000000 RIP=ffffffff814c0374 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 00007ff4e5cce900 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=00007ff4e62860b0 CR3=000000001a324000 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=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=00007ffe879ce7a8 CR3=000000000c702000 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=2031333a30313a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a30313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000