syzkaller login: [ 68.761962] BUG: Bad rss-counter state mm:00000000a197186a type:MM_FILEPAGES val:33 [ 68.763207] BUG: Bad rss-counter state mm:00000000a197186a type:MM_ANONPAGES val:22 [ 68.919475] ================================================================== [ 68.920398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.921335] Read of size 8 at addr ffff88800c62e228 by task sshd/226 [ 68.922093] [ 68.922415] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.923279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.924264] Call Trace: [ 68.924698] [ 68.925035] dump_stack_lvl+0x91/0xf0 [ 68.925629] print_report+0xcc/0x620 [ 68.926209] ? __virt_addr_valid+0x102/0x340 [ 68.926866] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.927641] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.928409] kasan_report+0xbe/0xf0 [ 68.929012] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.929817] vma_interval_tree_remove+0xc75/0xec0 [ 68.930591] vma_prepare+0xc54/0x11a0 [ 68.931197] __split_vma+0x5af/0x950 [ 68.931819] ? __pfx___split_vma+0x10/0x10 [ 68.932501] ? find_held_lock+0x2c/0x110 [ 68.933162] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.933873] ? lock_is_held_type+0x9f/0x120 [ 68.934547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.935329] ? mtree_range_walk+0x632/0x900 [ 68.936048] ? mas_walk+0x5c7/0x7c0 [ 68.936646] do_vmi_munmap+0x1f1/0x2b0 [ 68.937279] mmap_region+0x1f9/0x2660 [ 68.937886] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.938533] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.939448] ? __pfx_lock_acquire+0x10/0x10 [ 68.940140] ? __pfx_mmap_region+0x10/0x10 [ 68.940699] ? security_mmap_addr+0x7d/0xa0 [ 68.941256] ? get_unmapped_area+0x1f5/0x3f0 [ 68.941826] do_mmap+0x854/0xf00 [ 68.942279] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.942791] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.943374] ksys_mmap_pgoff+0x3af/0x500 [ 68.943914] do_syscall_64+0x3f/0x90 [ 68.944409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.945082] RIP: 0033:0x7f29c41b2d82 [ 68.945567] 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 [ 68.947813] RSP: 002b:00007ffc57ad2168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.948759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29c41b2d82 [ 68.949652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29c35ec000 [ 68.950533] RBP: 00007f29c35ec000 R08: 0000000000000009 R09: 0000000000001000 [ 68.951424] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e79aa4cb20 [ 68.952331] R13: 00007ffc57ad2180 R14: 00007ffc57ad21b0 R15: 00007ffc57ad2510 [ 68.953230] [ 68.953542] [ 68.953764] Allocated by task 219: [ 68.954218] kasan_save_stack+0x22/0x50 [ 68.954749] kasan_set_track+0x25/0x30 [ 68.955263] __kasan_slab_alloc+0x59/0x70 [ 68.955831] kmem_cache_alloc+0x16b/0x370 [ 68.956374] vm_area_dup+0x20/0x160 [ 68.956854] __split_vma+0x170/0x950 [ 68.957343] split_vma+0xc6/0x110 [ 68.957805] mprotect_fixup+0x8d2/0xb30 [ 68.958337] do_mprotect_pkey+0x87e/0xd40 [ 68.958881] __x64_sys_mprotect+0x78/0xc0 [ 68.959433] do_syscall_64+0x3f/0x90 [ 68.959938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.960600] [ 68.960822] Freed by task 219: [ 68.961244] kasan_save_stack+0x22/0x50 [ 68.961774] kasan_set_track+0x25/0x30 [ 68.962288] kasan_save_free_info+0x2b/0x50 [ 68.962841] __kasan_slab_free+0x10a/0x190 [ 68.963397] kmem_cache_free+0x10d/0x4d0 [ 68.963935] rcu_core+0x8c8/0x2860 [ 68.964400] __do_softirq+0x1b7/0x7d4 [ 68.964898] [ 68.965119] Last potentially related work creation: [ 68.965723] kasan_save_stack+0x22/0x50 [ 68.966252] __kasan_record_aux_stack+0x8e/0xa0 [ 68.966847] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.967529] remove_vma+0x139/0x170 [ 68.968023] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.968603] do_vmi_munmap+0x1f1/0x2b0 [ 68.969110] __vm_munmap+0x138/0x3a0 [ 68.969597] __x64_sys_munmap+0x59/0x80 [ 68.970115] do_syscall_64+0x3f/0x90 [ 68.970605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.971280] [ 68.971500] The buggy address belongs to the object at ffff88800c62e1d0 [ 68.971500] which belongs to the cache vm_area_struct of size 168 [ 68.973044] The buggy address is located 88 bytes inside of [ 68.973044] freed 168-byte region [ffff88800c62e1d0, ffff88800c62e278) [ 68.974549] [ 68.974770] The buggy address belongs to the physical page: [ 68.975437] page:00000000019f73bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc62e [ 68.976542] memcg:ffff888017f52c01 [ 68.976973] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.977616] page_type: 0xffffffff() [ 68.978060] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.978994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f52c01 [ 68.979907] page dumped because: kasan: bad access detected [ 68.980561] [ 68.980777] Memory state around the buggy address: [ 68.981360] ffff88800c62e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.982226] ffff88800c62e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 68.983085] >ffff88800c62e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 68.983943] ^ [ 68.984500] ffff88800c62e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 68.985351] ffff88800c62e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 68.986191] ================================================================== [ 68.987324] Disabling lock debugging due to kernel taint [ 71.000197] BUG: Bad rss-counter state mm:0000000090159d69 type:MM_FILEPAGES val:33 [ 71.001537] BUG: Bad rss-counter state mm:0000000090159d69 type:MM_ANONPAGES val:22 [ 71.535937] BUG: Bad rss-counter state mm:000000005dbd011f type:MM_FILEPAGES val:33 [ 71.537590] BUG: Bad rss-counter state mm:000000005dbd011f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54160' (ECDSA) to the list of known hosts. 2023/06/20 16:38:55 fuzzer started 2023/06/20 16:38:55 dialing manager at localhost:36067 2023/06/20 16:38:55 checking machine... 2023/06/20 16:38:55 checking revisions... [ 72.219108] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:38:55 testing simple program... [ 72.276930] cgroup: Unknown subsys name 'net' [ 72.331749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:38:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffce462c688 CR3=0000000005482000 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=00007f261f3dd5100000563ce042c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fedb680 RSI=ffffffff811f8808 RDI=0000000000000005 RBP=00000000000000eb RSP=ffff88801473f870 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=00000000000000eb R13=0000000000000000 R14=ffff88801473fb80 R15=ffff88800fedb680 RIP=ffffffff814c0880 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 00007f8e7eee6900 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=00007f3986d39650 CR3=000000000c584000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0c945ff95e5fedc000000000000ae988 XMM05=93cdda89902c84910000000000134608 XMM06=13e856d8d71426c80000000000132de8 XMM07=fb795ef6d65770560000000000123310 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000