syzkaller login: [ 48.713891] BUG: Bad rss-counter state mm:00000000f7f60e8e type:MM_FILEPAGES val:33 [ 48.715029] BUG: Bad rss-counter state mm:00000000f7f60e8e type:MM_ANONPAGES val:22 [ 48.872896] ================================================================== [ 48.874048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.875243] Read of size 8 at addr ffff88800da8bdf0 by task sshd/220 [ 48.876285] [ 48.876540] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.877618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.878822] Call Trace: [ 48.879213] [ 48.879558] dump_stack_lvl+0x91/0xf0 [ 48.880149] print_report+0xcc/0x620 [ 48.880737] ? __virt_addr_valid+0x102/0x340 [ 48.881405] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.882140] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.882881] kasan_report+0xbe/0xf0 [ 48.883443] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.884191] vma_interval_tree_remove+0xc75/0xec0 [ 48.884948] vma_prepare+0xc54/0x11a0 [ 48.885521] __split_vma+0x5af/0x950 [ 48.886087] ? __pfx___split_vma+0x10/0x10 [ 48.886724] ? find_held_lock+0x2c/0x110 [ 48.887356] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.888033] ? lock_is_held_type+0x9f/0x120 [ 48.888685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.889430] ? mtree_range_walk+0x632/0x900 [ 48.890097] ? mas_walk+0x5c7/0x7c0 [ 48.890657] do_vmi_munmap+0x1f1/0x2b0 [ 48.891247] mmap_region+0x1f9/0x2660 [ 48.891829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.892441] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.893320] ? __pfx_lock_acquire+0x10/0x10 [ 48.893960] ? __pfx_mmap_region+0x10/0x10 [ 48.894597] ? security_mmap_addr+0x7d/0xa0 [ 48.895235] ? get_unmapped_area+0x1f5/0x3f0 [ 48.895909] do_mmap+0x854/0xf00 [ 48.896440] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.897047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.897732] ksys_mmap_pgoff+0x3af/0x500 [ 48.898338] do_syscall_64+0x3f/0x90 [ 48.898905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.899673] RIP: 0033:0x7fb97c8d5d82 [ 48.900222] 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 [ 48.902337] RSP: 002b:00007ffe5823bc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.903189] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb97c8d5d82 [ 48.903987] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb97bd0f000 [ 48.904782] RBP: 00007fb97bd0f000 R08: 0000000000000009 R09: 0000000000001000 [ 48.905580] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0b1bfab20 [ 48.906377] R13: 00007ffe5823bc50 R14: 00007ffe5823bc80 R15: 00007ffe5823bfe0 [ 48.907223] [ 48.907510] [ 48.907721] Allocated by task 213: [ 48.908142] kasan_save_stack+0x22/0x50 [ 48.908641] kasan_set_track+0x25/0x30 [ 48.909145] __kasan_slab_alloc+0x59/0x70 [ 48.909671] kmem_cache_alloc+0x16b/0x370 [ 48.910186] vm_area_dup+0x20/0x160 [ 48.910639] __split_vma+0x170/0x950 [ 48.911105] split_vma+0xc6/0x110 [ 48.911555] mprotect_fixup+0x8d2/0xb30 [ 48.912060] do_mprotect_pkey+0x87e/0xd40 [ 48.912570] __x64_sys_mprotect+0x78/0xc0 [ 48.913109] do_syscall_64+0x3f/0x90 [ 48.913575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.914213] [ 48.914424] Freed by task 213: [ 48.914815] kasan_save_stack+0x22/0x50 [ 48.915324] kasan_set_track+0x25/0x30 [ 48.915812] kasan_save_free_info+0x2b/0x50 [ 48.916443] __kasan_slab_free+0x10a/0x190 [ 48.916991] kmem_cache_free+0x10d/0x4d0 [ 48.917493] rcu_core+0x8c8/0x2860 [ 48.917936] __do_softirq+0x1b7/0x7d4 [ 48.918411] [ 48.918626] Last potentially related work creation: [ 48.919208] kasan_save_stack+0x22/0x50 [ 48.919711] __kasan_record_aux_stack+0x8e/0xa0 [ 48.920278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.920932] remove_vma+0x139/0x170 [ 48.921390] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.921945] do_vmi_munmap+0x1f1/0x2b0 [ 48.922425] __vm_munmap+0x138/0x3a0 [ 48.922892] __x64_sys_munmap+0x59/0x80 [ 48.923397] do_syscall_64+0x3f/0x90 [ 48.923878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.924505] [ 48.924744] The buggy address belongs to the object at ffff88800da8bd98 [ 48.924744] which belongs to the cache vm_area_struct of size 168 [ 48.926110] The buggy address is located 88 bytes inside of [ 48.926110] freed 168-byte region [ffff88800da8bd98, ffff88800da8be40) [ 48.927426] [ 48.927629] The buggy address belongs to the physical page: [ 48.928245] page:00000000062123ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda8b [ 48.929269] memcg:ffff88800e480d01 [ 48.929688] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.930322] page_type: 0xffffffff() [ 48.930760] raw: 0100000000000200 ffff88800879fc80 ffffea000038fd80 dead000000000008 [ 48.931654] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e480d01 [ 48.932539] page dumped because: kasan: bad access detected [ 48.933202] [ 48.933409] Memory state around the buggy address: [ 48.933981] ffff88800da8bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 48.934807] ffff88800da8bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 48.935631] >ffff88800da8bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 48.936462] ^ [ 48.937253] ffff88800da8be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 48.938103] ffff88800da8be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.938938] ================================================================== [ 48.939848] Disabling lock debugging due to kernel taint [ 51.737993] BUG: Bad rss-counter state mm:00000000e12ac15e type:MM_FILEPAGES val:33 [ 51.739298] BUG: Bad rss-counter state mm:00000000e12ac15e type:MM_ANONPAGES val:22 [ 52.323033] BUG: Bad rss-counter state mm:000000002722e690 type:MM_FILEPAGES val:33 [ 52.324068] BUG: Bad rss-counter state mm:000000002722e690 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38257' (ECDSA) to the list of known hosts. 2023/06/19 19:08:55 fuzzer started 2023/06/19 19:08:55 dialing manager at localhost:44161 2023/06/19 19:08:55 checking machine... 2023/06/19 19:08:55 checking revisions... [ 53.067255] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:08:55 testing simple program... [ 53.122111] cgroup: Unknown subsys name 'net' [ 53.162496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:08:45 Registers: info registers vcpu 0 RAX=ffffffff81807d58 RBX=ffffffff85dfc4f4 RCX=ffffffff81807eba RDX=0000000000000000 RSI=ffffffff86136d7c RDI=ffffffff85dfc4f4 RBP=ffffffff85dfc4f8 RSP=ffff88801827f3c0 R8 =ffffffff86136d7c R9 =ffff88801827f4b8 R10=0000000000038001 R11=0000000000020c48 R12=ffffffff85dfc4f4 R13=ffffffff85dfc4f4 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007fb7ba05f700 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=00007ffe06cd9378 CR3=000000000da0c000 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=2034353a38303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000001 RDX=1ffff1100d9e134c RSI=ffff88801680ff50 RDI=ffff88806cf09a60 RBP=ffff88801680ff50 RSP=ffff88806cf099a8 R8 =ffffffff864b024a R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff888016808000 R14=ffff88801680ff58 R15=ffff88806cf09a50 RIP=ffffffff81130468 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 00007f957a0a6900 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=00007f957a65d618 CR3=000000000f25c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000