syzkaller login: [ 37.751995] BUG: Bad rss-counter state mm:00000000af4f04d6 type:MM_FILEPAGES val:33 [ 37.753552] BUG: Bad rss-counter state mm:00000000af4f04d6 type:MM_ANONPAGES val:22 [ 37.906308] ================================================================== [ 37.907421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.908536] Read of size 8 at addr ffff8880164dd310 by task sshd/220 [ 37.909607] [ 37.909833] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.910706] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.911693] Call Trace: [ 37.912012] [ 37.912298] dump_stack_lvl+0x91/0xf0 [ 37.912785] print_report+0xcc/0x620 [ 37.913294] ? __virt_addr_valid+0x102/0x340 [ 37.913867] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.914487] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.915113] kasan_report+0xbe/0xf0 [ 37.915598] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.916225] vma_interval_tree_remove+0xc75/0xec0 [ 37.916826] vma_prepare+0xc54/0x11a0 [ 37.917320] __split_vma+0x5af/0x950 [ 37.917793] ? __pfx___split_vma+0x10/0x10 [ 37.918324] ? find_held_lock+0x2c/0x110 [ 37.918844] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.919407] ? lock_is_held_type+0x9f/0x120 [ 37.919945] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.920548] ? mtree_range_walk+0x632/0x900 [ 37.921122] ? mas_walk+0x5c7/0x7c0 [ 37.921596] do_vmi_munmap+0x1f1/0x2b0 [ 37.922092] mmap_region+0x1f9/0x2660 [ 37.922577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.923088] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.923799] ? __pfx_lock_acquire+0x10/0x10 [ 37.924329] ? __pfx_mmap_region+0x10/0x10 [ 37.924854] ? security_mmap_addr+0x7d/0xa0 [ 37.925402] ? get_unmapped_area+0x1f5/0x3f0 [ 37.925961] do_mmap+0x854/0xf00 [ 37.926411] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.926905] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.927467] ksys_mmap_pgoff+0x3af/0x500 [ 37.927978] do_syscall_64+0x3f/0x90 [ 37.928456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.929115] RIP: 0033:0x7fd423ca6d82 [ 37.929573] 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 [ 37.931697] RSP: 002b:00007ffc457708e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.932605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd423ca6d82 [ 37.933467] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4230e0000 [ 37.934346] RBP: 00007fd4230e0000 R08: 0000000000000009 R09: 0000000000001000 [ 37.935227] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd7ef9fec0 [ 37.936070] R13: 00007ffc45770900 R14: 00007ffc45770930 R15: 00007ffc45770c90 [ 37.936930] [ 37.937224] [ 37.937441] Allocated by task 213: [ 37.937875] kasan_save_stack+0x22/0x50 [ 37.938381] kasan_set_track+0x25/0x30 [ 37.938882] __kasan_slab_alloc+0x59/0x70 [ 37.939414] kmem_cache_alloc+0x16b/0x370 [ 37.939927] vm_area_dup+0x20/0x160 [ 37.940383] __split_vma+0x170/0x950 [ 37.940852] split_vma+0xc6/0x110 [ 37.941324] mprotect_fixup+0x8d2/0xb30 [ 37.941835] do_mprotect_pkey+0x87e/0xd40 [ 37.942360] __x64_sys_mprotect+0x78/0xc0 [ 37.942890] do_syscall_64+0x3f/0x90 [ 37.943365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.944009] [ 37.944224] Freed by task 213: [ 37.944619] kasan_save_stack+0x22/0x50 [ 37.945161] kasan_set_track+0x25/0x30 [ 37.945659] kasan_save_free_info+0x2b/0x50 [ 37.946202] __kasan_slab_free+0x10a/0x190 [ 37.946737] kmem_cache_free+0x10d/0x4d0 [ 37.947250] rcu_core+0x8c8/0x2860 [ 37.947698] __do_softirq+0x1b7/0x7d4 [ 37.948177] [ 37.948391] Last potentially related work creation: [ 37.948985] kasan_save_stack+0x22/0x50 [ 37.949489] __kasan_record_aux_stack+0x8e/0xa0 [ 37.950105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.950769] remove_vma+0x139/0x170 [ 37.951219] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.951775] do_vmi_munmap+0x1f1/0x2b0 [ 37.952260] __vm_munmap+0x138/0x3a0 [ 37.952734] __x64_sys_munmap+0x59/0x80 [ 37.953245] do_syscall_64+0x3f/0x90 [ 37.953726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.954370] [ 37.954588] The buggy address belongs to the object at ffff8880164dd2b8 [ 37.954588] which belongs to the cache vm_area_struct of size 168 [ 37.956062] The buggy address is located 88 bytes inside of [ 37.956062] freed 168-byte region [ffff8880164dd2b8, ffff8880164dd360) [ 37.957485] [ 37.957704] The buggy address belongs to the physical page: [ 37.958371] page:000000009247c104 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164dd [ 37.959462] memcg:ffff8880159b8301 [ 37.959898] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.960550] page_type: 0xffffffff() [ 37.961027] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.961964] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159b8301 [ 37.962879] page dumped because: kasan: bad access detected [ 37.963566] [ 37.963782] Memory state around the buggy address: [ 37.964377] ffff8880164dd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 37.965266] ffff8880164dd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.966125] >ffff8880164dd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.966983] ^ [ 37.967462] ffff8880164dd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.968328] ffff8880164dd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.969231] ================================================================== [ 37.970200] Disabling lock debugging due to kernel taint [ 40.207004] BUG: Bad rss-counter state mm:00000000d9f9fd03 type:MM_FILEPAGES val:33 [ 40.207981] BUG: Bad rss-counter state mm:00000000d9f9fd03 type:MM_ANONPAGES val:22 [ 40.664451] BUG: Bad rss-counter state mm:00000000421291a1 type:MM_FILEPAGES val:33 [ 40.665486] BUG: Bad rss-counter state mm:00000000421291a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42226' (ECDSA) to the list of known hosts. 2023/06/19 15:53:12 fuzzer started 2023/06/19 15:53:12 dialing manager at localhost:44161 2023/06/19 15:53:12 checking machine... 2023/06/19 15:53:12 checking revisions... [ 41.394596] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:53:12 testing simple program... [ 41.438309] cgroup: Unknown subsys name 'net' [ 41.478710] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652988 RCX=0000000000000000 RDX=ffff888016771b40 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801697f7b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000092cc0 RIP=ffffffff814c84e2 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 00007f0bb191a900 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=00007f0bb1ed1618 CR3=00000000096ba000 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=0000000000000001 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=00007fd79405db20 CR3=000000000da2c000 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=2031313a33353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a33353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000