syzkaller login: [ 34.324799] BUG: Bad rss-counter state mm:00000000d3dbfddf type:MM_FILEPAGES val:33 [ 34.326138] BUG: Bad rss-counter state mm:00000000d3dbfddf type:MM_ANONPAGES val:22 [ 34.366023] ================================================================== [ 34.366551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.367102] Read of size 8 at addr ffff88801451e3f8 by task sshd/220 [ 34.367553] [ 34.367682] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.368184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.368754] Call Trace: [ 34.368946] [ 34.369121] dump_stack_lvl+0x91/0xf0 [ 34.369407] print_report+0xcc/0x620 [ 34.369694] ? __virt_addr_valid+0x102/0x340 [ 34.370018] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.370378] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.370834] kasan_report+0xbe/0xf0 [ 34.371122] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.371489] vma_interval_tree_remove+0xc75/0xec0 [ 34.371840] vma_prepare+0xc54/0x11a0 [ 34.372123] __split_vma+0x5af/0x950 [ 34.372398] ? __pfx___split_vma+0x10/0x10 [ 34.372707] ? find_held_lock+0x2c/0x110 [ 34.373026] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.373356] ? lock_is_held_type+0x9f/0x120 [ 34.373671] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.374032] ? mtree_range_walk+0x632/0x900 [ 34.374354] ? mas_walk+0x5c7/0x7c0 [ 34.374629] do_vmi_munmap+0x1f1/0x2b0 [ 34.374922] mmap_region+0x1f9/0x2660 [ 34.375205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.375506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.375923] ? __pfx_lock_acquire+0x10/0x10 [ 34.376235] ? __pfx_mmap_region+0x10/0x10 [ 34.376544] ? security_mmap_addr+0x7d/0xa0 [ 34.376853] ? get_unmapped_area+0x1f5/0x3f0 [ 34.377179] do_mmap+0x854/0xf00 [ 34.377436] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.377728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.378054] ksys_mmap_pgoff+0x3af/0x500 [ 34.378349] do_syscall_64+0x3f/0x90 [ 34.378627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.379003] RIP: 0033:0x7f0fab6d2d82 [ 34.379270] 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 [ 34.380509] RSP: 002b:00007ffe00ab4828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.381045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fab6d2d82 [ 34.381539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0faab0c000 [ 34.382032] RBP: 00007f0faab0c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.382523] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4a1891d90 [ 34.383019] R13: 00007ffe00ab4840 R14: 00007ffe00ab4870 R15: 00007ffe00ab4bd0 [ 34.383520] [ 34.383692] [ 34.383817] Allocated by task 213: [ 34.384068] kasan_save_stack+0x22/0x50 [ 34.384362] kasan_set_track+0x25/0x30 [ 34.384652] __kasan_slab_alloc+0x59/0x70 [ 34.384959] kmem_cache_alloc+0x16b/0x370 [ 34.385274] vm_area_dup+0x20/0x160 [ 34.385543] __split_vma+0x170/0x950 [ 34.385818] split_vma+0xc6/0x110 [ 34.386077] mprotect_fixup+0x8d2/0xb30 [ 34.386370] do_mprotect_pkey+0x87e/0xd40 [ 34.386673] __x64_sys_mprotect+0x78/0xc0 [ 34.386976] do_syscall_64+0x3f/0x90 [ 34.387251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.387625] [ 34.387750] Freed by task 13: [ 34.387983] kasan_save_stack+0x22/0x50 [ 34.388279] kasan_set_track+0x25/0x30 [ 34.388565] kasan_save_free_info+0x2b/0x50 [ 34.388875] __kasan_slab_free+0x10a/0x190 [ 34.389197] kmem_cache_free+0x10d/0x4d0 [ 34.389492] rcu_core+0x8c8/0x2860 [ 34.389753] __do_softirq+0x1b7/0x7d4 [ 34.390033] [ 34.390157] Last potentially related work creation: [ 34.390504] kasan_save_stack+0x22/0x50 [ 34.390797] __kasan_record_aux_stack+0x8e/0xa0 [ 34.391136] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.391513] remove_vma+0x139/0x170 [ 34.391777] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.392100] do_vmi_munmap+0x1f1/0x2b0 [ 34.392386] __vm_munmap+0x138/0x3a0 [ 34.392660] __x64_sys_munmap+0x59/0x80 [ 34.392950] do_syscall_64+0x3f/0x90 [ 34.393233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.393609] [ 34.393734] The buggy address belongs to the object at ffff88801451e3a0 [ 34.393734] which belongs to the cache vm_area_struct of size 168 [ 34.394594] The buggy address is located 88 bytes inside of [ 34.394594] freed 168-byte region [ffff88801451e3a0, ffff88801451e448) [ 34.395420] [ 34.395545] The buggy address belongs to the physical page: [ 34.395931] page:0000000092ef2290 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1451e [ 34.396568] memcg:ffff888016952201 [ 34.396817] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.397522] page_type: 0xffffffff() [ 34.398118] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.399284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016952201 [ 34.400455] page dumped because: kasan: bad access detected [ 34.401321] [ 34.401599] Memory state around the buggy address: [ 34.402341] ffff88801451e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.403445] ffff88801451e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.404541] >ffff88801451e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.405657] ^ [ 34.406566] ffff88801451e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.407443] ffff88801451e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.408313] ================================================================== [ 34.409234] Disabling lock debugging due to kernel taint [ 36.258010] BUG: Bad rss-counter state mm:000000004dc48f59 type:MM_FILEPAGES val:33 [ 36.258988] BUG: Bad rss-counter state mm:000000004dc48f59 type:MM_ANONPAGES val:22 [ 36.674597] BUG: Bad rss-counter state mm:000000007d38f888 type:MM_FILEPAGES val:33 [ 36.675803] BUG: Bad rss-counter state mm:000000007d38f888 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1609' (ECDSA) to the list of known hosts. 2023/06/19 22:52:32 fuzzer started 2023/06/19 22:52:32 dialing manager at localhost:44161 2023/06/19 22:52:33 checking machine... 2023/06/19 22:52:33 checking revisions... [ 37.343487] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:52:33 testing simple program... [ 37.391204] cgroup: Unknown subsys name 'net' [ 37.442409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:52:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010610c98 RCX=0000000000000000 RDX=1ffff110020c2194 RSI=ffffffff81f31855 RDI=ffff888010610ca0 RBP=00000000000002f0 RSP=ffff888019d0fa18 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000006 R11=00000000000b6996 R12=ffff888008f67008 R13=0000000000001080 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f3187a 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 00007f3d67a7e900 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=00007f3d68035618 CR3=0000000019fd4000 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=00007ffcbcf00000 CR3=000000000e8fe000 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=2032333a32353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a32353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000