syzkaller login: [ 36.071117] BUG: Bad rss-counter state mm:00000000796d29dc type:MM_FILEPAGES val:33 [ 36.072232] BUG: Bad rss-counter state mm:00000000796d29dc type:MM_ANONPAGES val:22 [ 36.233019] ================================================================== [ 36.234144] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.235420] Read of size 8 at addr ffff88800edb9b38 by task sshd/220 [ 36.236340] [ 36.236608] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.237682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.238678] Call Trace: [ 36.238999] [ 36.239281] dump_stack_lvl+0x91/0xf0 [ 36.239790] print_report+0xcc/0x620 [ 36.240273] ? __virt_addr_valid+0x102/0x340 [ 36.240848] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.241477] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.242128] kasan_report+0xbe/0xf0 [ 36.242618] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.243253] vma_interval_tree_remove+0xc75/0xec0 [ 36.243869] vma_prepare+0xc54/0x11a0 [ 36.244354] __split_vma+0x5af/0x950 [ 36.244847] ? __pfx___split_vma+0x10/0x10 [ 36.245376] ? find_held_lock+0x2c/0x110 [ 36.245925] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.246497] ? lock_is_held_type+0x9f/0x120 [ 36.247054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.247677] ? mtree_range_walk+0x632/0x900 [ 36.248233] ? mas_walk+0x5c7/0x7c0 [ 36.248751] do_vmi_munmap+0x1f1/0x2b0 [ 36.249247] mmap_region+0x1f9/0x2660 [ 36.249757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.250284] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.251008] ? __pfx_lock_acquire+0x10/0x10 [ 36.251538] ? __pfx_mmap_region+0x10/0x10 [ 36.252084] ? security_mmap_addr+0x7d/0xa0 [ 36.252632] ? get_unmapped_area+0x1f5/0x3f0 [ 36.253197] do_mmap+0x854/0xf00 [ 36.253656] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.254160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.254735] ksys_mmap_pgoff+0x3af/0x500 [ 36.255279] do_syscall_64+0x3f/0x90 [ 36.255779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.256435] RIP: 0033:0x7f1429771d82 [ 36.256913] 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 [ 36.259081] RSP: 002b:00007ffdec019fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.260007] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1429771d82 [ 36.260890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1428bab000 [ 36.261762] RBP: 00007f1428bab000 R08: 0000000000000009 R09: 0000000000001000 [ 36.262626] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561eca3bdec0 [ 36.263485] R13: 00007ffdec019fd0 R14: 00007ffdec01a000 R15: 00007ffdec01a360 [ 36.264443] [ 36.264838] [ 36.265117] Allocated by task 213: [ 36.265665] kasan_save_stack+0x22/0x50 [ 36.266318] kasan_set_track+0x25/0x30 [ 36.266957] __kasan_slab_alloc+0x59/0x70 [ 36.267624] kmem_cache_alloc+0x16b/0x370 [ 36.268172] vm_area_dup+0x20/0x160 [ 36.268652] __split_vma+0x170/0x950 [ 36.269150] split_vma+0xc6/0x110 [ 36.269603] mprotect_fixup+0x8d2/0xb30 [ 36.270113] do_mprotect_pkey+0x87e/0xd40 [ 36.270662] __x64_sys_mprotect+0x78/0xc0 [ 36.271189] do_syscall_64+0x3f/0x90 [ 36.271688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.272345] [ 36.272569] Freed by task 204: [ 36.272982] kasan_save_stack+0x22/0x50 [ 36.273492] kasan_set_track+0x25/0x30 [ 36.274006] kasan_save_free_info+0x2b/0x50 [ 36.274554] __kasan_slab_free+0x10a/0x190 [ 36.275109] kmem_cache_free+0x10d/0x4d0 [ 36.275657] rcu_core+0x8c8/0x2860 [ 36.276105] __do_softirq+0x1b7/0x7d4 [ 36.276596] [ 36.276830] Last potentially related work creation: [ 36.277493] kasan_save_stack+0x22/0x50 [ 36.278014] __kasan_record_aux_stack+0x8e/0xa0 [ 36.278594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.279241] remove_vma+0x139/0x170 [ 36.279717] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.280283] do_vmi_munmap+0x1f1/0x2b0 [ 36.280812] __vm_munmap+0x138/0x3a0 [ 36.281285] __x64_sys_munmap+0x59/0x80 [ 36.281798] do_syscall_64+0x3f/0x90 [ 36.282275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.282935] [ 36.283153] The buggy address belongs to the object at ffff88800edb9ae0 [ 36.283153] which belongs to the cache vm_area_struct of size 168 [ 36.284696] The buggy address is located 88 bytes inside of [ 36.284696] freed 168-byte region [ffff88800edb9ae0, ffff88800edb9b88) [ 36.286152] [ 36.286374] The buggy address belongs to the physical page: [ 36.287052] page:00000000f5dbec43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedb9 [ 36.288173] memcg:ffff88800db29e01 [ 36.288625] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.289306] page_type: 0xffffffff() [ 36.289776] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 36.290721] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db29e01 [ 36.291655] page dumped because: kasan: bad access detected [ 36.292325] [ 36.292543] Memory state around the buggy address: [ 36.293155] ffff88800edb9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.294040] ffff88800edb9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 36.294907] >ffff88800edb9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.295785] ^ [ 36.296396] ffff88800edb9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.297280] ffff88800edb9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.298145] ================================================================== [ 36.299095] Disabling lock debugging due to kernel taint [ 39.120468] BUG: Bad rss-counter state mm:000000006ed25e1d type:MM_FILEPAGES val:33 [ 39.121712] BUG: Bad rss-counter state mm:000000006ed25e1d type:MM_ANONPAGES val:22 [ 39.590736] BUG: Bad rss-counter state mm:00000000ceb66afd type:MM_FILEPAGES val:33 [ 39.592106] BUG: Bad rss-counter state mm:00000000ceb66afd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3627' (ECDSA) to the list of known hosts. 2023/06/21 06:04:08 fuzzer started 2023/06/21 06:04:08 dialing manager at localhost:36067 2023/06/21 06:04:08 checking machine... 2023/06/21 06:04:08 checking revisions... [ 40.253059] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:04:08 testing simple program... [ 40.295911] cgroup: Unknown subsys name 'net' [ 40.340119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:04:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81369979 RDX=0000000000000002 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88806ce3a2c0 RSP=ffff888008d9fcb8 R8 =0000000000000000 R9 =ffffffff85616780 R10=ffff88806ce3a2d2 R11=0000000000000128 R12=ffffffff85616740 R13=0000000000007c45 R14=ffff88806ce3a2d4 R15=0000000000000000 RIP=ffffffff8136a23e 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 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=00007ffc336485c8 CR3=0000000019c78000 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=2038303a34303a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a34303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e0d240 RCX=1ffffffff0ba7c92 RDX=1ffff110011c1a48 RSI=0000000000000008 RDI=ffff888008e0d288 RBP=ffff88806cf395c0 RSP=ffff888008e37ca0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=00000000000b7c84 R13=ffff888008e0d2c0 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff81252474 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=00007f59e558d618 CR3=000000000f2ca000 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