syzkaller login: [ 41.577960] BUG: Bad rss-counter state mm:0000000038a1d14b type:MM_FILEPAGES val:33 [ 41.579164] BUG: Bad rss-counter state mm:0000000038a1d14b type:MM_ANONPAGES val:22 [ 41.618207] ================================================================== [ 41.619161] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.620092] Read of size 8 at addr ffff88800de93140 by task sshd/218 [ 41.620931] [ 41.621156] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.622039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.623030] Call Trace: [ 41.623349] [ 41.623629] dump_stack_lvl+0x91/0xf0 [ 41.624115] print_report+0xcc/0x620 [ 41.624595] ? __virt_addr_valid+0x102/0x340 [ 41.625156] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.625775] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.626406] kasan_report+0xbe/0xf0 [ 41.626885] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.627514] vma_interval_tree_remove+0xc75/0xec0 [ 41.628127] vma_prepare+0xc54/0x11a0 [ 41.628604] __split_vma+0x5af/0x950 [ 41.629069] ? __pfx___split_vma+0x10/0x10 [ 41.629595] ? find_held_lock+0x2c/0x110 [ 41.630138] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.630701] ? lock_is_held_type+0x9f/0x120 [ 41.631234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.631839] ? mtree_range_walk+0x632/0x900 [ 41.632388] ? mas_walk+0x5c7/0x7c0 [ 41.632855] do_vmi_munmap+0x1f1/0x2b0 [ 41.633347] mmap_region+0x1f9/0x2660 [ 41.633823] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.634340] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.635054] ? __pfx_lock_acquire+0x10/0x10 [ 41.635580] ? __pfx_mmap_region+0x10/0x10 [ 41.636140] ? security_mmap_addr+0x7d/0xa0 [ 41.636718] ? get_unmapped_area+0x1f5/0x3f0 [ 41.637292] do_mmap+0x854/0xf00 [ 41.637759] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.638304] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.638908] ksys_mmap_pgoff+0x3af/0x500 [ 41.639442] do_syscall_64+0x3f/0x90 [ 41.639943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.640615] RIP: 0033:0x7f399e7ead82 [ 41.641118] 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 [ 41.643470] RSP: 002b:00007fff301c5628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.644427] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f399e7ead82 [ 41.645275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f399dc24000 [ 41.646119] RBP: 00007f399dc24000 R08: 0000000000000009 R09: 0000000000001000 [ 41.646957] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d508eff60 [ 41.647822] R13: 00007fff301c5640 R14: 00007fff301c5670 R15: 00007fff301c59d0 [ 41.648685] [ 41.648987] [ 41.649198] Allocated by task 211: [ 41.649622] kasan_save_stack+0x22/0x50 [ 41.650141] kasan_set_track+0x25/0x30 [ 41.650637] __kasan_slab_alloc+0x59/0x70 [ 41.651165] kmem_cache_alloc+0x16b/0x370 [ 41.651682] vm_area_dup+0x20/0x160 [ 41.652138] __split_vma+0x170/0x950 [ 41.652607] split_vma+0xc6/0x110 [ 41.653041] mprotect_fixup+0x8d2/0xb30 [ 41.653549] do_mprotect_pkey+0x87e/0xd40 [ 41.654091] __x64_sys_mprotect+0x78/0xc0 [ 41.654620] do_syscall_64+0x3f/0x90 [ 41.655100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.655747] [ 41.655964] Freed by task 19: [ 41.656359] kasan_save_stack+0x22/0x50 [ 41.656857] kasan_set_track+0x25/0x30 [ 41.657362] kasan_save_free_info+0x2b/0x50 [ 41.657899] __kasan_slab_free+0x10a/0x190 [ 41.658427] kmem_cache_free+0x10d/0x4d0 [ 41.658934] rcu_core+0x8c8/0x2860 [ 41.659373] __do_softirq+0x1b7/0x7d4 [ 41.659852] [ 41.660065] Last potentially related work creation: [ 41.660654] kasan_save_stack+0x22/0x50 [ 41.661153] __kasan_record_aux_stack+0x8e/0xa0 [ 41.661726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.662373] remove_vma+0x139/0x170 [ 41.662829] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.663387] do_vmi_munmap+0x1f1/0x2b0 [ 41.663870] __vm_munmap+0x138/0x3a0 [ 41.664343] __x64_sys_munmap+0x59/0x80 [ 41.664840] do_syscall_64+0x3f/0x90 [ 41.665316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.665973] [ 41.666189] The buggy address belongs to the object at ffff88800de930e8 [ 41.666189] which belongs to the cache vm_area_struct of size 168 [ 41.667653] The buggy address is located 88 bytes inside of [ 41.667653] freed 168-byte region [ffff88800de930e8, ffff88800de93190) [ 41.669053] [ 41.669269] The buggy address belongs to the physical page: [ 41.669927] page:00000000fa8fd10a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde93 [ 41.671011] memcg:ffff88800e0bc201 [ 41.671432] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.672129] page_type: 0xffffffff() [ 41.672577] raw: 0100000000000200 ffff88800879fc80 ffffea00003871c0 dead000000000007 [ 41.673500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0bc201 [ 41.674426] page dumped because: kasan: bad access detected [ 41.675105] [ 41.675335] Memory state around the buggy address: [ 41.675919] ffff88800de93000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.676778] ffff88800de93080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 41.677633] >ffff88800de93100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.678491] ^ [ 41.679141] ffff88800de93180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 41.679999] ffff88800de93200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 41.680864] ================================================================== [ 41.681980] Disabling lock debugging due to kernel taint [ 43.590991] BUG: Bad rss-counter state mm:0000000016e8c872 type:MM_FILEPAGES val:33 [ 43.591977] BUG: Bad rss-counter state mm:0000000016e8c872 type:MM_ANONPAGES val:22 [ 44.113883] BUG: Bad rss-counter state mm:00000000c445035d type:MM_FILEPAGES val:33 [ 44.115072] BUG: Bad rss-counter state mm:00000000c445035d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22916' (ECDSA) to the list of known hosts. 2023/06/19 15:53:30 fuzzer started 2023/06/19 15:53:30 dialing manager at localhost:44161 2023/06/19 15:53:30 checking machine... 2023/06/19 15:53:30 checking revisions... [ 44.701853] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:53:30 testing simple program... [ 44.741383] cgroup: Unknown subsys name 'net' [ 44.792623] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:27 Registers: info registers vcpu 0 RAX=ffffffff83726220 RBX=1ffff11002be3f16 RCX=0000000000000000 RDX=1ffff110011bd7d1 RSI=ffffffff83744639 RDI=ffff888008debe88 RBP=ffff8880165e0000 RSP=ffff888015f1f890 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000006 R13=ffff8880167f9dd8 R14=ffff8880167f9dc0 R15=ffff888008debe80 RIP=ffffffff8374465c 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 00007f3e72b36900 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=00007f3e730ed618 CR3=000000001a6c2000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f3e730eb650 CR3=000000001679e000 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=2039323a33353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a33353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000