syzkaller login: [ 55.920695] BUG: Bad rss-counter state mm:00000000a2db57e5 type:MM_FILEPAGES val:33 [ 55.921869] BUG: Bad rss-counter state mm:00000000a2db57e5 type:MM_ANONPAGES val:22 [ 56.068701] ================================================================== [ 56.069668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.070687] Read of size 8 at addr ffff8880141e1c20 by task sshd/222 [ 56.071506] [ 56.071747] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.072762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.073801] Call Trace: [ 56.074177] [ 56.074481] dump_stack_lvl+0x91/0xf0 [ 56.075008] print_report+0xcc/0x620 [ 56.075528] ? __virt_addr_valid+0x102/0x340 [ 56.076120] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.076794] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.077450] kasan_report+0xbe/0xf0 [ 56.077960] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.078623] vma_interval_tree_remove+0xc75/0xec0 [ 56.079262] vma_prepare+0xc54/0x11a0 [ 56.079778] __split_vma+0x5af/0x950 [ 56.080281] ? __pfx___split_vma+0x10/0x10 [ 56.080851] ? find_held_lock+0x2c/0x110 [ 56.081409] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.082016] ? lock_is_held_type+0x9f/0x120 [ 56.082589] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.083248] ? mtree_range_walk+0x632/0x900 [ 56.083837] ? mas_walk+0x5c7/0x7c0 [ 56.084343] do_vmi_munmap+0x1f1/0x2b0 [ 56.084892] mmap_region+0x1f9/0x2660 [ 56.085412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.085959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.086716] ? __pfx_lock_acquire+0x10/0x10 [ 56.087286] ? __pfx_mmap_region+0x10/0x10 [ 56.087854] ? security_mmap_addr+0x7d/0xa0 [ 56.088417] ? get_unmapped_area+0x1f5/0x3f0 [ 56.089017] do_mmap+0x854/0xf00 [ 56.089486] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.090013] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.090609] ksys_mmap_pgoff+0x3af/0x500 [ 56.091150] do_syscall_64+0x3f/0x90 [ 56.091663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.092350] RIP: 0033:0x7eff926b8d82 [ 56.092860] 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 [ 56.095172] RSP: 002b:00007ffe971a8ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.096152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff926b8d82 [ 56.097077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff91af2000 [ 56.097986] RBP: 00007eff91af2000 R08: 0000000000000009 R09: 0000000000001000 [ 56.098907] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5fe556ec0 [ 56.099824] R13: 00007ffe971a8d00 R14: 00007ffe971a8d30 R15: 00007ffe971a9090 [ 56.100772] [ 56.101091] [ 56.101321] Allocated by task 215: [ 56.101792] kasan_save_stack+0x22/0x50 [ 56.102335] kasan_set_track+0x25/0x30 [ 56.102858] __kasan_slab_alloc+0x59/0x70 [ 56.103425] kmem_cache_alloc+0x16b/0x370 [ 56.103975] vm_area_dup+0x20/0x160 [ 56.104458] __split_vma+0x170/0x950 [ 56.104964] split_vma+0xc6/0x110 [ 56.105432] mprotect_fixup+0x8d2/0xb30 [ 56.105968] do_mprotect_pkey+0x87e/0xd40 [ 56.106527] __x64_sys_mprotect+0x78/0xc0 [ 56.107080] do_syscall_64+0x3f/0x90 [ 56.107586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.108277] [ 56.108510] Freed by task 13: [ 56.108932] kasan_save_stack+0x22/0x50 [ 56.109465] kasan_set_track+0x25/0x30 [ 56.109990] kasan_save_free_info+0x2b/0x50 [ 56.110566] __kasan_slab_free+0x10a/0x190 [ 56.111153] kmem_cache_free+0x10d/0x4d0 [ 56.111751] rcu_core+0x8c8/0x2860 [ 56.112290] __do_softirq+0x1b7/0x7d4 [ 56.112889] [ 56.113208] Last potentially related work creation: [ 56.113915] kasan_save_stack+0x22/0x50 [ 56.114519] __kasan_record_aux_stack+0x8e/0xa0 [ 56.115200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.115975] remove_vma+0x139/0x170 [ 56.116517] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.117207] do_vmi_munmap+0x1f1/0x2b0 [ 56.117774] __vm_munmap+0x138/0x3a0 [ 56.118336] __x64_sys_munmap+0x59/0x80 [ 56.118946] do_syscall_64+0x3f/0x90 [ 56.119513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.120268] [ 56.120524] The buggy address belongs to the object at ffff8880141e1bc8 [ 56.120524] which belongs to the cache vm_area_struct of size 168 [ 56.122314] The buggy address is located 88 bytes inside of [ 56.122314] freed 168-byte region [ffff8880141e1bc8, ffff8880141e1c70) [ 56.124017] [ 56.124270] The buggy address belongs to the physical page: [ 56.125067] page:00000000ff13735f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141e1 [ 56.126381] memcg:ffff88800df0bc01 [ 56.126894] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.127651] page_type: 0xffffffff() [ 56.128165] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.129188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df0bc01 [ 56.130182] page dumped because: kasan: bad access detected [ 56.130883] [ 56.131112] Memory state around the buggy address: [ 56.131729] ffff8880141e1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.132646] ffff8880141e1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 56.133557] >ffff8880141e1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 56.134492] ^ [ 56.135054] ffff8880141e1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 56.135972] ffff8880141e1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 56.136911] ================================================================== [ 56.137919] Disabling lock debugging due to kernel taint [ 58.086239] BUG: Bad rss-counter state mm:000000008a856801 type:MM_FILEPAGES val:33 [ 58.087258] BUG: Bad rss-counter state mm:000000008a856801 type:MM_ANONPAGES val:22 [ 58.644454] BUG: Bad rss-counter state mm:00000000342b8e10 type:MM_FILEPAGES val:33 [ 58.645535] BUG: Bad rss-counter state mm:00000000342b8e10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64887' (ECDSA) to the list of known hosts. 2023/06/19 16:46:25 fuzzer started 2023/06/19 16:46:25 dialing manager at localhost:44161 2023/06/19 16:46:25 checking machine... 2023/06/19 16:46:25 checking revisions... [ 59.291338] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:46:25 testing simple program... [ 59.334057] cgroup: Unknown subsys name 'net' [ 59.385320] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:45:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fd475a8 RCX=ffffffff860d6801 RDX=1ffff11001fa8ec0 RSI=0000000000000000 RDI=ffff88800fd475a8 RBP=ffff88800fd47600 RSP=ffff88800fd47590 R8 =ffffffff860d68fa R9 =ffff88800fd475e8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800fd47670 R13=0000000000000000 R14=ffff888015b53680 R15=0000000000000000 RIP=ffffffff8113038e 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 00007f8ed9a60900 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=00007f8eda017618 CR3=000000000eaec000 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=00007f4e83f6b710 CR3=000000000c5f0000 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=aa85a70b84a204b3a34367cb957798e8 XMM02=ec2efd57dc4c00df000000000011f920 XMM03=6e5199a5aa562cb9000000000011f9f0 XMM04=2ba01944adb9913d00000000000ae988 XMM05=59d5b690e0af863b0000000000133cb8 XMM06=bf849c6f3ded66bb0000000000132b20 XMM07=e042d86d42eb936e00000000001243b0 XMM08=6e5199a5aa562cb9000000000011f9f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000