syzkaller login: [ 23.768933] BUG: Bad rss-counter state mm:0000000068c256e7 type:MM_FILEPAGES val:33 [ 23.770746] BUG: Bad rss-counter state mm:0000000068c256e7 type:MM_ANONPAGES val:22 [ 23.913416] ================================================================== [ 23.914522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.915630] Read of size 8 at addr ffff88801823cb38 by task sshd/219 [ 23.916656] [ 23.916922] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.917937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.919078] Call Trace: [ 23.919397] [ 23.919688] dump_stack_lvl+0x91/0xf0 [ 23.920192] print_report+0xcc/0x620 [ 23.920677] ? __virt_addr_valid+0x102/0x340 [ 23.921237] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.921851] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.922476] kasan_report+0xbe/0xf0 [ 23.922957] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.923573] vma_interval_tree_remove+0xc75/0xec0 [ 23.924179] vma_prepare+0xc54/0x11a0 [ 23.924656] __split_vma+0x5af/0x950 [ 23.925161] ? __pfx___split_vma+0x10/0x10 [ 23.925707] ? find_held_lock+0x2c/0x110 [ 23.926268] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.926852] ? lock_is_held_type+0x9f/0x120 [ 23.927416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.928054] ? mtree_range_walk+0x632/0x900 [ 23.928631] ? mas_walk+0x5c7/0x7c0 [ 23.929137] do_vmi_munmap+0x1f1/0x2b0 [ 23.929668] mmap_region+0x1f9/0x2660 [ 23.930183] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.930729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.931476] ? __pfx_lock_acquire+0x10/0x10 [ 23.932043] ? __pfx_mmap_region+0x10/0x10 [ 23.932610] ? security_mmap_addr+0x7d/0xa0 [ 23.933178] ? get_unmapped_area+0x1f5/0x3f0 [ 23.933766] do_mmap+0x854/0xf00 [ 23.934230] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.934768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.935364] ksys_mmap_pgoff+0x3af/0x500 [ 23.935911] do_syscall_64+0x3f/0x90 [ 23.936421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.937103] RIP: 0033:0x7f90d866cd82 [ 23.937590] 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 [ 23.939779] RSP: 002b:00007ffc462e4c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.940696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90d866cd82 [ 23.941566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90d7aa6000 [ 23.942437] RBP: 00007f90d7aa6000 R08: 0000000000000009 R09: 0000000000001000 [ 23.943301] R10: 0000000000000812 R11: 0000000000000206 R12: 000055944c0e5f70 [ 23.944183] R13: 00007ffc462e4ca0 R14: 00007ffc462e4cd0 R15: 00007ffc462e5030 [ 23.945046] [ 23.945342] [ 23.945554] Allocated by task 212: [ 23.945987] kasan_save_stack+0x22/0x50 [ 23.946515] kasan_set_track+0x25/0x30 [ 23.947015] __kasan_slab_alloc+0x59/0x70 [ 23.947557] kmem_cache_alloc+0x16b/0x370 [ 23.948084] vm_area_dup+0x20/0x160 [ 23.948545] __split_vma+0x170/0x950 [ 23.949012] split_vma+0xc6/0x110 [ 23.949461] mprotect_fixup+0x8d2/0xb30 [ 23.949978] do_mprotect_pkey+0x87e/0xd40 [ 23.950524] __x64_sys_mprotect+0x78/0xc0 [ 23.951056] do_syscall_64+0x3f/0x90 [ 23.951534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.952185] [ 23.952398] Freed by task 212: [ 23.952805] kasan_save_stack+0x22/0x50 [ 23.953315] kasan_set_track+0x25/0x30 [ 23.953808] kasan_save_free_info+0x2b/0x50 [ 23.954394] __kasan_slab_free+0x10a/0x190 [ 23.954927] kmem_cache_free+0x10d/0x4d0 [ 23.955431] rcu_core+0x8c8/0x2860 [ 23.955872] __do_softirq+0x1b7/0x7d4 [ 23.956350] [ 23.956570] Last potentially related work creation: [ 23.957145] kasan_save_stack+0x22/0x50 [ 23.957644] __kasan_record_aux_stack+0x8e/0xa0 [ 23.958224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.958892] remove_vma+0x139/0x170 [ 23.959340] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.959893] do_vmi_munmap+0x1f1/0x2b0 [ 23.960380] __vm_munmap+0x138/0x3a0 [ 23.960846] __x64_sys_munmap+0x59/0x80 [ 23.961354] do_syscall_64+0x3f/0x90 [ 23.961836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.962498] [ 23.962721] The buggy address belongs to the object at ffff88801823cae0 [ 23.962721] which belongs to the cache vm_area_struct of size 168 [ 23.964199] The buggy address is located 88 bytes inside of [ 23.964199] freed 168-byte region [ffff88801823cae0, ffff88801823cb88) [ 23.965623] [ 23.965845] The buggy address belongs to the physical page: [ 23.966525] page:00000000ca9f9b9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1823c [ 23.967662] memcg:ffff88800f10fc01 [ 23.968099] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.968742] page_type: 0xffffffff() [ 23.969193] raw: 0100000000000200 ffff8880087a0c80 ffffea0000608d80 0000000000000002 [ 23.970112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f10fc01 [ 23.971031] page dumped because: kasan: bad access detected [ 23.971691] [ 23.971907] Memory state around the buggy address: [ 23.972487] ffff88801823ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.973344] ffff88801823ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 23.974200] >ffff88801823cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.975063] ^ [ 23.975672] ffff88801823cb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 23.976525] ffff88801823cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.977378] ================================================================== [ 23.978553] Disabling lock debugging due to kernel taint [ 26.537508] BUG: Bad rss-counter state mm:0000000078b7a90f type:MM_FILEPAGES val:33 [ 26.538515] BUG: Bad rss-counter state mm:0000000078b7a90f type:MM_ANONPAGES val:22 [ 27.034696] BUG: Bad rss-counter state mm:00000000d8d68802 type:MM_FILEPAGES val:33 [ 27.035641] BUG: Bad rss-counter state mm:00000000d8d68802 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16139' (ECDSA) to the list of known hosts. 2023/06/20 15:15:18 fuzzer started 2023/06/20 15:15:18 dialing manager at localhost:36067 2023/06/20 15:15:18 checking machine... 2023/06/20 15:15:18 checking revisions... [ 27.778915] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:15:18 testing simple program... [ 27.833494] cgroup: Unknown subsys name 'net' [ 27.885155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:15:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880142bd1c0 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=1ffff11002b18ecf RSP=ffff8880158c7668 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800feb6d10 RIP=ffffffff812d8699 RFL=00000216 [----AP-] 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 00007fb49e840900 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=00007fb49dc5f5a0 CR3=000000000cb40000 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=73e60ad7ecd4ab5c00000000000ae988 XMM05=ef4e5f29976a491c0000000000133290 XMM06=dfcdbad4f1609c370000000000132068 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000e0 RBX=00000000000000e0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff888009b281a0 RSP=ffff88800a18f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffff888009b28050 R14=ffff888009b28048 R15=ffff888009b28060 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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 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=0000560cbc322748 CR3=000000000da9a000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000