syzkaller login: [ 30.752109] BUG: Bad rss-counter state mm:00000000edddaed7 type:MM_FILEPAGES val:33 [ 30.753341] BUG: Bad rss-counter state mm:00000000edddaed7 type:MM_ANONPAGES val:22 [ 30.846108] ================================================================== [ 30.847201] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.848324] Read of size 8 at addr ffff88801a234ed8 by task sshd/220 [ 30.849242] [ 30.849503] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.850707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.851869] Call Trace: [ 30.852255] [ 30.852598] dump_stack_lvl+0x91/0xf0 [ 30.853185] print_report+0xcc/0x620 [ 30.853780] ? __virt_addr_valid+0x102/0x340 [ 30.854390] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854727] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855062] kasan_report+0xbe/0xf0 [ 30.855325] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855688] vma_interval_tree_remove+0xc75/0xec0 [ 30.856037] vma_prepare+0xc54/0x11a0 [ 30.856310] __split_vma+0x5af/0x950 [ 30.856589] ? __pfx___split_vma+0x10/0x10 [ 30.856896] ? find_held_lock+0x2c/0x110 [ 30.857194] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.857520] ? lock_is_held_type+0x9f/0x120 [ 30.857837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.858189] ? mtree_range_walk+0x632/0x900 [ 30.858498] ? mas_walk+0x5c7/0x7c0 [ 30.858776] do_vmi_munmap+0x1f1/0x2b0 [ 30.859056] mmap_region+0x1f9/0x2660 [ 30.859337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859636] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860060] ? __pfx_lock_acquire+0x10/0x10 [ 30.860372] ? __pfx_mmap_region+0x10/0x10 [ 30.860680] ? security_mmap_addr+0x7d/0xa0 [ 30.860989] ? get_unmapped_area+0x1f5/0x3f0 [ 30.861304] do_mmap+0x854/0xf00 [ 30.861550] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.861842] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.862165] ksys_mmap_pgoff+0x3af/0x500 [ 30.862462] do_syscall_64+0x3f/0x90 [ 30.862735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863107] RIP: 0033:0x7f74e624fd82 [ 30.863371] 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 [ 30.864600] RSP: 002b:00007ffc9a967ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.865125] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74e624fd82 [ 30.865624] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74e5689000 [ 30.866139] RBP: 00007f74e5689000 R08: 0000000000000009 R09: 0000000000001000 [ 30.866632] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e57bb2ec0 [ 30.867131] R13: 00007ffc9a967ec0 R14: 00007ffc9a967ef0 R15: 00007ffc9a968250 [ 30.867618] [ 30.867792] [ 30.867914] Allocated by task 213: [ 30.868162] kasan_save_stack+0x22/0x50 [ 30.868448] kasan_set_track+0x25/0x30 [ 30.868732] __kasan_slab_alloc+0x59/0x70 [ 30.869032] kmem_cache_alloc+0x16b/0x370 [ 30.869331] vm_area_dup+0x20/0x160 [ 30.869592] __split_vma+0x170/0x950 [ 30.869867] split_vma+0xc6/0x110 [ 30.870117] mprotect_fixup+0x8d2/0xb30 [ 30.870409] do_mprotect_pkey+0x87e/0xd40 [ 30.870712] __x64_sys_mprotect+0x78/0xc0 [ 30.871020] do_syscall_64+0x3f/0x90 [ 30.871303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.871685] [ 30.871810] Freed by task 210: [ 30.872037] kasan_save_stack+0x22/0x50 [ 30.872335] kasan_set_track+0x25/0x30 [ 30.872631] kasan_save_free_info+0x2b/0x50 [ 30.872939] __kasan_slab_free+0x10a/0x190 [ 30.873255] kmem_cache_free+0x10d/0x4d0 [ 30.873553] rcu_core+0x8c8/0x2860 [ 30.873828] __do_softirq+0x1b7/0x7d4 [ 30.874110] [ 30.874238] Last potentially related work creation: [ 30.874578] kasan_save_stack+0x22/0x50 [ 30.874873] __kasan_record_aux_stack+0x8e/0xa0 [ 30.875223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.875597] remove_vma+0x139/0x170 [ 30.875862] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.876186] do_vmi_munmap+0x1f1/0x2b0 [ 30.876471] __vm_munmap+0x138/0x3a0 [ 30.876753] __x64_sys_munmap+0x59/0x80 [ 30.877041] do_syscall_64+0x3f/0x90 [ 30.877310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877682] [ 30.877813] The buggy address belongs to the object at ffff88801a234e80 [ 30.877813] which belongs to the cache vm_area_struct of size 168 [ 30.878697] The buggy address is located 88 bytes inside of [ 30.878697] freed 168-byte region [ffff88801a234e80, ffff88801a234f28) [ 30.879523] [ 30.879649] The buggy address belongs to the physical page: [ 30.880042] page:00000000b6621369 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a234 [ 30.880691] memcg:ffff88800c6fe601 [ 30.880945] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.881340] page_type: 0xffffffff() [ 30.881605] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6fe601 [ 30.882679] page dumped because: kasan: bad access detected [ 30.883064] [ 30.883189] Memory state around the buggy address: [ 30.883541] ffff88801a234d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.884040] ffff88801a234e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.884542] >ffff88801a234e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885041] ^ [ 30.885461] ffff88801a234f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.885979] ffff88801a234f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.886468] ================================================================== [ 30.887109] Disabling lock debugging due to kernel taint [ 33.459787] BUG: Bad rss-counter state mm:0000000018a77f8a type:MM_FILEPAGES val:33 [ 33.460787] BUG: Bad rss-counter state mm:0000000018a77f8a type:MM_ANONPAGES val:22 [ 34.030716] BUG: Bad rss-counter state mm:000000004cef160a type:MM_FILEPAGES val:33 [ 34.031733] BUG: Bad rss-counter state mm:000000004cef160a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48170' (ECDSA) to the list of known hosts. 2023/06/20 22:00:34 fuzzer started 2023/06/20 22:00:34 dialing manager at localhost:36067 2023/06/20 22:00:34 checking machine... 2023/06/20 22:00:34 checking revisions... [ 34.709081] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:00:34 testing simple program... [ 34.755212] cgroup: Unknown subsys name 'net' [ 34.793962] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:00:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff124c9838 CR3=0000000005482000 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=00007f2b59147510000055d1db964790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86121ccd RBX=0000000000000001 RCX=ffffffff86121ccc RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800ec7f5e8 RSP=ffff88800ec7f520 R8 =ffffffff86121cd0 R9 =ffff88800ec7f5d0 R10=0000000000038001 R11=000000000001cff6 R12=ffff88800ec7f5f0 R13=ffff88800ec7f5d8 R14=ffff88800ec7f880 R15=ffff88800ec7f590 RIP=ffffffff81130b99 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 00007fdedcb8f900 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=00007fdedd144650 CR3=000000000e936000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000