syzkaller login: [ 38.604098] sshd (213) used greatest stack depth: 24128 bytes left [ 38.606320] BUG: Bad rss-counter state mm:00000000db4ce668 type:MM_FILEPAGES val:33 [ 38.607302] BUG: Bad rss-counter state mm:00000000db4ce668 type:MM_ANONPAGES val:22 [ 38.768706] ================================================================== [ 38.769621] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.770663] Read of size 8 at addr ffff88800ffacdf0 by task sshd/220 [ 38.771452] [ 38.771669] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.772558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.773542] Call Trace: [ 38.773858] [ 38.774148] dump_stack_lvl+0x91/0xf0 [ 38.774629] print_report+0xcc/0x620 [ 38.775110] ? __virt_addr_valid+0x102/0x340 [ 38.775672] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.776296] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.776921] kasan_report+0xbe/0xf0 [ 38.777392] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.778023] vma_interval_tree_remove+0xc75/0xec0 [ 38.778625] vma_prepare+0xc54/0x11a0 [ 38.779103] __split_vma+0x5af/0x950 [ 38.779583] ? __pfx___split_vma+0x10/0x10 [ 38.780106] ? find_held_lock+0x2c/0x110 [ 38.780624] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.781184] ? lock_is_held_type+0x9f/0x120 [ 38.781720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.782322] ? mtree_range_walk+0x632/0x900 [ 38.782874] ? mas_walk+0x5c7/0x7c0 [ 38.783364] do_vmi_munmap+0x1f1/0x2b0 [ 38.783855] mmap_region+0x1f9/0x2660 [ 38.784331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.784840] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.785553] ? __pfx_lock_acquire+0x10/0x10 [ 38.786081] ? __pfx_mmap_region+0x10/0x10 [ 38.786608] ? security_mmap_addr+0x7d/0xa0 [ 38.787140] ? get_unmapped_area+0x1f5/0x3f0 [ 38.787705] do_mmap+0x854/0xf00 [ 38.788144] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.788640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.789206] ksys_mmap_pgoff+0x3af/0x500 [ 38.789714] do_syscall_64+0x3f/0x90 [ 38.790189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.790840] RIP: 0033:0x7fe63dbbbd82 [ 38.791312] 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 [ 38.793429] RSP: 002b:00007ffd695ce418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.794334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe63dbbbd82 [ 38.795172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe63cff5000 [ 38.796054] RBP: 00007fe63cff5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.796906] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b678fa1ec0 [ 38.797753] R13: 00007ffd695ce430 R14: 00007ffd695ce460 R15: 00007ffd695ce7c0 [ 38.798620] [ 38.798909] [ 38.799124] Allocated by task 213: [ 38.799560] kasan_save_stack+0x22/0x50 [ 38.800057] kasan_set_track+0x25/0x30 [ 38.800545] __kasan_slab_alloc+0x59/0x70 [ 38.801063] kmem_cache_alloc+0x16b/0x370 [ 38.801582] vm_area_dup+0x20/0x160 [ 38.802038] __split_vma+0x170/0x950 [ 38.802503] split_vma+0xc6/0x110 [ 38.802938] mprotect_fixup+0x8d2/0xb30 [ 38.803463] do_mprotect_pkey+0x87e/0xd40 [ 38.803981] __x64_sys_mprotect+0x78/0xc0 [ 38.804503] do_syscall_64+0x3f/0x90 [ 38.804971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.805608] [ 38.805821] Freed by task 213: [ 38.806213] kasan_save_stack+0x22/0x50 [ 38.806713] kasan_set_track+0x25/0x30 [ 38.807227] kasan_save_free_info+0x2b/0x50 [ 38.807758] __kasan_slab_free+0x10a/0x190 [ 38.808286] kmem_cache_free+0x10d/0x4d0 [ 38.808789] rcu_core+0x8c8/0x2860 [ 38.809230] __do_softirq+0x1b7/0x7d4 [ 38.809699] [ 38.809913] Last potentially related work creation: [ 38.810494] kasan_save_stack+0x22/0x50 [ 38.810996] __kasan_record_aux_stack+0x8e/0xa0 [ 38.811570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.812206] remove_vma+0x139/0x170 [ 38.812658] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.813214] do_vmi_munmap+0x1f1/0x2b0 [ 38.813699] __vm_munmap+0x138/0x3a0 [ 38.814159] __x64_sys_munmap+0x59/0x80 [ 38.814651] do_syscall_64+0x3f/0x90 [ 38.815120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.815763] [ 38.815977] The buggy address belongs to the object at ffff88800ffacd98 [ 38.815977] which belongs to the cache vm_area_struct of size 168 [ 38.817436] The buggy address is located 88 bytes inside of [ 38.817436] freed 168-byte region [ffff88800ffacd98, ffff88800fface40) [ 38.818834] [ 38.819048] The buggy address belongs to the physical page: [ 38.819715] page:000000009f213cba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffac [ 38.820786] memcg:ffff888018a64801 [ 38.821209] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.821853] page_type: 0xffffffff() [ 38.822302] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.823225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018a64801 [ 38.824132] page dumped because: kasan: bad access detected [ 38.824781] [ 38.824994] Memory state around the buggy address: [ 38.825569] ffff88800ffacc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.826413] ffff88800ffacd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.827285] >ffff88800ffacd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.828133] ^ [ 38.828930] ffff88800fface00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.829775] ffff88800fface80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.830625] ================================================================== [ 38.831810] Disabling lock debugging due to kernel taint [ 41.644052] BUG: Bad rss-counter state mm:000000008e95922d type:MM_FILEPAGES val:33 [ 41.645217] BUG: Bad rss-counter state mm:000000008e95922d type:MM_ANONPAGES val:22 [ 42.044151] BUG: Bad rss-counter state mm:00000000920940d9 type:MM_FILEPAGES val:33 [ 42.045153] BUG: Bad rss-counter state mm:00000000920940d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58084' (ECDSA) to the list of known hosts. 2023/06/19 18:02:29 fuzzer started 2023/06/19 18:02:29 dialing manager at localhost:44161 2023/06/19 18:02:29 checking machine... 2023/06/19 18:02:29 checking revisions... [ 42.747470] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:02:30 testing simple program... [ 42.807816] cgroup: Unknown subsys name 'net' [ 42.845615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:02:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f6cead3f650 CR3=000000000b81c000 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=2039323a32303a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a32303a3831203931 XMM08=3d656e696c646d632022656369767265 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=00007f12243fb730 CR3=000000000910a000 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=12b10e0ea094dab953472c797ed6410a XMM02=ec2efd57dc4c00df000000000011fc88 XMM03=5beebca348aaa8c4000000000011fd58 XMM04=fb26032ac6979bb000000000000ae988 XMM05=19e9129bd510f23500000000001341c0 XMM06=4fda316b135da52b0000000000134048 XMM07=e042d86d42eb936e00000000001246b0 XMM08=5beebca348aaa8c4000000000011fd58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000