syzkaller login: [ 29.043942] BUG: Bad rss-counter state mm:00000000a20ec69f type:MM_FILEPAGES val:33 [ 29.044942] BUG: Bad rss-counter state mm:00000000a20ec69f type:MM_ANONPAGES val:22 [ 29.208712] ================================================================== [ 29.209673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.210556] Read of size 8 at addr ffff88800e14b880 by task sshd/220 [ 29.211375] [ 29.211583] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.212434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.213464] Call Trace: [ 29.213796] [ 29.214086] dump_stack_lvl+0x91/0xf0 [ 29.214588] print_report+0xcc/0x620 [ 29.215079] ? __virt_addr_valid+0x102/0x340 [ 29.215646] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.216287] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.216919] kasan_report+0xbe/0xf0 [ 29.217407] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.218043] vma_interval_tree_remove+0xc75/0xec0 [ 29.218652] vma_prepare+0xc54/0x11a0 [ 29.219152] __split_vma+0x5af/0x950 [ 29.219638] ? __pfx___split_vma+0x10/0x10 [ 29.220189] ? find_held_lock+0x2c/0x110 [ 29.220738] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.221317] ? lock_is_held_type+0x9f/0x120 [ 29.221868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.222499] ? mtree_range_walk+0x632/0x900 [ 29.223059] ? mas_walk+0x5c7/0x7c0 [ 29.223551] do_vmi_munmap+0x1f1/0x2b0 [ 29.224052] mmap_region+0x1f9/0x2660 [ 29.224565] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.225087] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.225821] ? __pfx_lock_acquire+0x10/0x10 [ 29.226378] ? __pfx_mmap_region+0x10/0x10 [ 29.226922] ? security_mmap_addr+0x7d/0xa0 [ 29.227469] ? get_unmapped_area+0x1f5/0x3f0 [ 29.228037] do_mmap+0x854/0xf00 [ 29.228500] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.229028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.229602] ksys_mmap_pgoff+0x3af/0x500 [ 29.230114] do_syscall_64+0x3f/0x90 [ 29.230610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.231272] RIP: 0033:0x7f85b4fe1d82 [ 29.231734] 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 [ 29.233904] RSP: 002b:00007ffc6cfc1cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.234828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85b4fe1d82 [ 29.235687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85b441b000 [ 29.236556] RBP: 00007f85b441b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.237425] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564300a1fec0 [ 29.238290] R13: 00007ffc6cfc1ce0 R14: 00007ffc6cfc1d10 R15: 00007ffc6cfc2070 [ 29.239166] [ 29.239463] [ 29.239685] Allocated by task 213: [ 29.240114] kasan_save_stack+0x22/0x50 [ 29.240641] kasan_set_track+0x25/0x30 [ 29.241143] __kasan_slab_alloc+0x59/0x70 [ 29.241687] kmem_cache_alloc+0x16b/0x370 [ 29.242220] vm_area_dup+0x20/0x160 [ 29.242688] __split_vma+0x170/0x950 [ 29.243167] split_vma+0xc6/0x110 [ 29.243613] mprotect_fixup+0x8d2/0xb30 [ 29.244132] do_mprotect_pkey+0x87e/0xd40 [ 29.244684] __x64_sys_mprotect+0x78/0xc0 [ 29.245219] do_syscall_64+0x3f/0x90 [ 29.245711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.246366] [ 29.246588] Freed by task 13: [ 29.246976] kasan_save_stack+0x22/0x50 [ 29.247490] kasan_set_track+0x25/0x30 [ 29.247994] kasan_save_free_info+0x2b/0x50 [ 29.248548] __kasan_slab_free+0x10a/0x190 [ 29.249089] kmem_cache_free+0x10d/0x4d0 [ 29.249609] rcu_core+0x8c8/0x2860 [ 29.250065] __do_softirq+0x1b7/0x7d4 [ 29.250559] [ 29.250776] Last potentially related work creation: [ 29.251377] kasan_save_stack+0x22/0x50 [ 29.251891] __kasan_record_aux_stack+0x8e/0xa0 [ 29.252475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.253152] remove_vma+0x139/0x170 [ 29.253621] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.254193] do_vmi_munmap+0x1f1/0x2b0 [ 29.254692] __vm_munmap+0x138/0x3a0 [ 29.255169] __x64_sys_munmap+0x59/0x80 [ 29.255680] do_syscall_64+0x3f/0x90 [ 29.256169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.256849] [ 29.257070] Second to last potentially related work creation: [ 29.257782] kasan_save_stack+0x22/0x50 [ 29.258307] __kasan_record_aux_stack+0x8e/0xa0 [ 29.258898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.259561] remove_vma+0x139/0x170 [ 29.260022] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.260597] do_vmi_munmap+0x1f1/0x2b0 [ 29.261100] __vm_munmap+0x138/0x3a0 [ 29.261581] __x64_sys_munmap+0x59/0x80 [ 29.262087] do_syscall_64+0x3f/0x90 [ 29.262579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.263244] [ 29.263465] The buggy address belongs to the object at ffff88800e14b828 [ 29.263465] which belongs to the cache vm_area_struct of size 168 [ 29.264989] The buggy address is located 88 bytes inside of [ 29.264989] freed 168-byte region [ffff88800e14b828, ffff88800e14b8d0) [ 29.266440] [ 29.266659] The buggy address belongs to the physical page: [ 29.267329] page:0000000004ac153f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe14b [ 29.268432] memcg:ffff88800ed1fd01 [ 29.268884] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.269599] page_type: 0xffffffff() [ 29.270049] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b42c0 dead000000000009 [ 29.271005] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed1fd01 [ 29.271933] page dumped because: kasan: bad access detected [ 29.272633] [ 29.272847] Memory state around the buggy address: [ 29.273440] ffff88800e14b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.274312] ffff88800e14b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.275185] >ffff88800e14b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.276046] ^ [ 29.276456] ffff88800e14b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.277332] ffff88800e14b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.278191] ================================================================== [ 29.279244] Disabling lock debugging due to kernel taint [ 31.189558] BUG: Bad rss-counter state mm:0000000099bdf45b type:MM_FILEPAGES val:33 [ 31.190741] BUG: Bad rss-counter state mm:0000000099bdf45b type:MM_ANONPAGES val:22 [ 31.574423] BUG: Bad rss-counter state mm:00000000628f8317 type:MM_FILEPAGES val:33 [ 31.575409] BUG: Bad rss-counter state mm:00000000628f8317 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61575' (ECDSA) to the list of known hosts. 2023/06/20 17:49:02 fuzzer started 2023/06/20 17:49:02 dialing manager at localhost:36067 2023/06/20 17:49:02 checking machine... 2023/06/20 17:49:02 checking revisions... [ 32.307563] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:49:02 testing simple program... [ 32.360182] cgroup: Unknown subsys name 'net' [ 32.400481] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:49:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015a63680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81716c49 RDI=ffff888015a63a74 RBP=ffff888015a63680 RSP=ffff888016aefdb8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888015a63680 R13=ffffffff84938760 R14=0000000000000040 R15=ffff888008458940 RIP=ffffffff8137459d RFL=00000217 [----APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7ced263900 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=00007f7cec6e97a0 CR3=000000001410c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1f38a7d5b7431f5600000000000ae988 XMM05=eb7af2e390eb08aa0000000000134070 XMM06=4fda316b135da52b0000000000132e60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffc90000660000 RBX=ffff88800b958b80 RCX=1ffff1100172b208 RDX=1ffff1100172b1b6 RSI=0000000000000004 RDI=ffff888008f37aa8 RBP=1ffff110011e6f76 RSP=ffff888008f37b38 R8 =0000000000000001 R9 =ffffed10011e6f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800b958d98 R13=0000000000000000 R14=ffff88800b958000 R15=ffff88800b958b80 RIP=ffffffff8302b452 RFL=00000046 [---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 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=00007f62c487c618 CR3=000000000ded8000 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=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