syzkaller login: [ 31.499683] BUG: Bad rss-counter state mm:00000000af7d8001 type:MM_FILEPAGES val:33 [ 31.501112] BUG: Bad rss-counter state mm:00000000af7d8001 type:MM_ANONPAGES val:22 [ 31.666244] ================================================================== [ 31.667226] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.668220] Read of size 8 at addr ffff8880159ea4e0 by task sshd/219 [ 31.669155] [ 31.669394] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.670289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.671337] Call Trace: [ 31.671668] [ 31.671969] dump_stack_lvl+0x91/0xf0 [ 31.672486] print_report+0xcc/0x620 [ 31.672994] ? __virt_addr_valid+0x102/0x340 [ 31.673581] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674215] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674855] kasan_report+0xbe/0xf0 [ 31.675349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.675999] vma_interval_tree_remove+0xc75/0xec0 [ 31.676617] vma_prepare+0xc54/0x11a0 [ 31.677118] __split_vma+0x5af/0x950 [ 31.677664] ? __pfx___split_vma+0x10/0x10 [ 31.678221] ? find_held_lock+0x2c/0x110 [ 31.678775] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.679346] ? lock_is_held_type+0x9f/0x120 [ 31.679895] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.680526] ? mtree_range_walk+0x632/0x900 [ 31.681087] ? mas_walk+0x5c7/0x7c0 [ 31.681581] do_vmi_munmap+0x1f1/0x2b0 [ 31.682089] mmap_region+0x1f9/0x2660 [ 31.682583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.683100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.683845] ? __pfx_lock_acquire+0x10/0x10 [ 31.684387] ? __pfx_mmap_region+0x10/0x10 [ 31.684936] ? security_mmap_addr+0x7d/0xa0 [ 31.685491] ? get_unmapped_area+0x1f5/0x3f0 [ 31.686052] do_mmap+0x854/0xf00 [ 31.686500] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.687001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.687568] ksys_mmap_pgoff+0x3af/0x500 [ 31.688082] do_syscall_64+0x3f/0x90 [ 31.688559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.689247] RIP: 0033:0x7f78b7fded82 [ 31.689716] 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 [ 31.691838] RSP: 002b:00007ffe6fba8cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.692741] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78b7fded82 [ 31.693609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78b7418000 [ 31.694445] RBP: 00007f78b7418000 R08: 0000000000000009 R09: 0000000000001000 [ 31.695298] R10: 0000000000000812 R11: 0000000000000206 R12: 000056399c0abb20 [ 31.696147] R13: 00007ffe6fba8ce0 R14: 00007ffe6fba8d10 R15: 00007ffe6fba9070 [ 31.696998] [ 31.697299] [ 31.697520] Allocated by task 212: [ 31.697955] kasan_save_stack+0x22/0x50 [ 31.698470] kasan_set_track+0x25/0x30 [ 31.698964] __kasan_slab_alloc+0x59/0x70 [ 31.699489] kmem_cache_alloc+0x16b/0x370 [ 31.700015] vm_area_dup+0x20/0x160 [ 31.700474] __split_vma+0x170/0x950 [ 31.700938] split_vma+0xc6/0x110 [ 31.701403] mprotect_fixup+0x8d2/0xb30 [ 31.701904] do_mprotect_pkey+0x87e/0xd40 [ 31.702433] __x64_sys_mprotect+0x78/0xc0 [ 31.702954] do_syscall_64+0x3f/0x90 [ 31.703428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704063] [ 31.704286] Freed by task 19: [ 31.704663] kasan_save_stack+0x22/0x50 [ 31.705174] kasan_set_track+0x25/0x30 [ 31.705673] kasan_save_free_info+0x2b/0x50 [ 31.706201] __kasan_slab_free+0x10a/0x190 [ 31.706734] kmem_cache_free+0x10d/0x4d0 [ 31.707252] rcu_core+0x8c8/0x2860 [ 31.707694] __do_softirq+0x1b7/0x7d4 [ 31.708195] [ 31.708419] Last potentially related work creation: [ 31.709026] kasan_save_stack+0x22/0x50 [ 31.709574] __kasan_record_aux_stack+0x8e/0xa0 [ 31.710222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.710891] remove_vma+0x139/0x170 [ 31.711360] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.711947] do_vmi_munmap+0x1f1/0x2b0 [ 31.712450] __vm_munmap+0x138/0x3a0 [ 31.712937] __x64_sys_munmap+0x59/0x80 [ 31.713468] do_syscall_64+0x3f/0x90 [ 31.713958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.714623] [ 31.714847] The buggy address belongs to the object at ffff8880159ea488 [ 31.714847] which belongs to the cache vm_area_struct of size 168 [ 31.716369] The buggy address is located 88 bytes inside of [ 31.716369] freed 168-byte region [ffff8880159ea488, ffff8880159ea530) [ 31.717839] [ 31.718062] The buggy address belongs to the physical page: [ 31.718743] page:000000004dfc2451 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159ea [ 31.719877] memcg:ffff88800ff44301 [ 31.720314] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.720985] page_type: 0xffffffff() [ 31.721474] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.722406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff44301 [ 31.723336] page dumped because: kasan: bad access detected [ 31.724026] [ 31.724242] Memory state around the buggy address: [ 31.724848] ffff8880159ea380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.725800] ffff8880159ea400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.726694] >ffff8880159ea480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.727566] ^ [ 31.728333] ffff8880159ea500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.729219] ffff8880159ea580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.730076] ================================================================== [ 31.731043] Disabling lock debugging due to kernel taint [ 33.752612] BUG: Bad rss-counter state mm:00000000274f64db type:MM_FILEPAGES val:33 [ 33.754130] BUG: Bad rss-counter state mm:00000000274f64db type:MM_ANONPAGES val:22 [ 34.263642] BUG: Bad rss-counter state mm:0000000066a13f60 type:MM_FILEPAGES val:33 [ 34.264816] BUG: Bad rss-counter state mm:0000000066a13f60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45199' (ECDSA) to the list of known hosts. 2023/06/19 23:17:30 fuzzer started 2023/06/19 23:17:30 dialing manager at localhost:44161 2023/06/19 23:17:30 checking machine... 2023/06/19 23:17:30 checking revisions... [ 35.042138] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:17:31 testing simple program... [ 35.082826] cgroup: Unknown subsys name 'net' [ 35.130570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:17:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800950a200 RCX=ffff88800950a200 RDX=0000000080070005 RSI=ffff88800950a200 RDI=ffff8880087b63c0 RBP=ffff88800da977f8 RSP=ffff88800da97760 R8 =0000000080070004 R9 =0000000000000000 R10=ffffea0000254200 R11=000000000080002c R12=ffffea0000254200 R13=ffff888009509100 R14=0000000080070004 R15=ffff8880087b63c0 RIP=ffffffff818094f2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2f4bb2d900 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=00007f2f4af8b4f0 CR3=00000000099d0000 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=452c5a3ed40f463500000000000ae988 XMM05=2c62d35b695e9acb00000000001364b8 XMM06=dfcdbad4f1609c370000000000135318 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000081 RCX=0000000000000000 RDX=ffff888018b7d1c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800c1a8c98 RSP=ffff8880174af8d8 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000000 R13=0000000010000000 R14=1ffff11002e95f1e R15=0000000000000000 RIP=ffffffff814c0384 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 00007fb11c31f900 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=00007ffcdb826000 CR3=000000000d910000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000