syzkaller login: [ 60.914015] BUG: Bad rss-counter state mm:00000000c10eca76 type:MM_FILEPAGES val:33 [ 60.915266] BUG: Bad rss-counter state mm:00000000c10eca76 type:MM_ANONPAGES val:22 [ 60.953229] ================================================================== [ 60.954205] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.955166] Read of size 8 at addr ffff88800ca80880 by task sshd/219 [ 60.956056] [ 60.956280] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.957177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.958197] Call Trace: [ 60.958525] [ 60.958813] dump_stack_lvl+0x91/0xf0 [ 60.959313] print_report+0xcc/0x620 [ 60.959805] ? __virt_addr_valid+0x102/0x340 [ 60.960368] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.961004] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.961637] kasan_report+0xbe/0xf0 [ 60.962131] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.962761] vma_interval_tree_remove+0xc75/0xec0 [ 60.963383] vma_prepare+0xc54/0x11a0 [ 60.963864] __split_vma+0x5af/0x950 [ 60.964341] ? __pfx___split_vma+0x10/0x10 [ 60.964879] ? find_held_lock+0x2c/0x110 [ 60.965412] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.966003] ? lock_is_held_type+0x9f/0x120 [ 60.966556] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.967175] ? mtree_range_walk+0x632/0x900 [ 60.967739] ? mas_walk+0x5c7/0x7c0 [ 60.968218] do_vmi_munmap+0x1f1/0x2b0 [ 60.968722] mmap_region+0x1f9/0x2660 [ 60.969217] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.969746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.970480] ? __pfx_lock_acquire+0x10/0x10 [ 60.971022] ? __pfx_mmap_region+0x10/0x10 [ 60.971561] ? security_mmap_addr+0x7d/0xa0 [ 60.972103] ? get_unmapped_area+0x1f5/0x3f0 [ 60.972666] do_mmap+0x854/0xf00 [ 60.973113] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.973618] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.974193] ksys_mmap_pgoff+0x3af/0x500 [ 60.974712] do_syscall_64+0x3f/0x90 [ 60.975205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.975863] RIP: 0033:0x7f40f39f5d82 [ 60.976333] 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 [ 60.978513] RSP: 002b:00007ffd64ae8128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.979443] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40f39f5d82 [ 60.980317] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40f2e2f000 [ 60.981178] RBP: 00007f40f2e2f000 R08: 0000000000000009 R09: 0000000000001000 [ 60.982047] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558651719ec0 [ 60.982913] R13: 00007ffd64ae8140 R14: 00007ffd64ae8170 R15: 00007ffd64ae84d0 [ 60.983782] [ 60.984081] [ 60.984300] Allocated by task 212: [ 60.984741] kasan_save_stack+0x22/0x50 [ 60.985263] kasan_set_track+0x25/0x30 [ 60.985779] __kasan_slab_alloc+0x59/0x70 [ 60.986314] kmem_cache_alloc+0x16b/0x370 [ 60.986844] vm_area_dup+0x20/0x160 [ 60.987310] __split_vma+0x170/0x950 [ 60.987787] split_vma+0xc6/0x110 [ 60.988232] mprotect_fixup+0x8d2/0xb30 [ 60.988745] do_mprotect_pkey+0x87e/0xd40 [ 60.989277] __x64_sys_mprotect+0x78/0xc0 [ 60.989816] do_syscall_64+0x3f/0x90 [ 60.990308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.990965] [ 60.991190] Freed by task 212: [ 60.991587] kasan_save_stack+0x22/0x50 [ 60.992103] kasan_set_track+0x25/0x30 [ 60.992607] kasan_save_free_info+0x2b/0x50 [ 60.993146] __kasan_slab_free+0x10a/0x190 [ 60.993686] kmem_cache_free+0x10d/0x4d0 [ 60.994216] rcu_core+0x8c8/0x2860 [ 60.994661] __do_softirq+0x1b7/0x7d4 [ 60.995146] [ 60.995363] Last potentially related work creation: [ 60.995966] kasan_save_stack+0x22/0x50 [ 60.996476] __kasan_record_aux_stack+0x8e/0xa0 [ 60.997060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.997725] remove_vma+0x139/0x170 [ 60.998185] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.998753] do_vmi_munmap+0x1f1/0x2b0 [ 60.999253] __vm_munmap+0x138/0x3a0 [ 60.999721] __x64_sys_munmap+0x59/0x80 [ 61.000227] do_syscall_64+0x3f/0x90 [ 61.000703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.001363] [ 61.001584] The buggy address belongs to the object at ffff88800ca80828 [ 61.001584] which belongs to the cache vm_area_struct of size 168 [ 61.003085] The buggy address is located 88 bytes inside of [ 61.003085] freed 168-byte region [ffff88800ca80828, ffff88800ca808d0) [ 61.004513] [ 61.004734] The buggy address belongs to the physical page: [ 61.005405] page:00000000ae55a7e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca80 [ 61.006512] memcg:ffff888018216801 [ 61.006943] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.007614] page_type: 0xffffffff() [ 61.008067] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.009003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018216801 [ 61.009944] page dumped because: kasan: bad access detected [ 61.010622] [ 61.010843] Memory state around the buggy address: [ 61.011441] ffff88800ca80780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.012311] ffff88800ca80800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.013190] >ffff88800ca80880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.014076] ^ [ 61.014511] ffff88800ca80900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.015402] ffff88800ca80980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.016275] ================================================================== [ 61.017277] Disabling lock debugging due to kernel taint [ 62.910744] BUG: Bad rss-counter state mm:00000000d3e26210 type:MM_FILEPAGES val:33 [ 62.911778] BUG: Bad rss-counter state mm:00000000d3e26210 type:MM_ANONPAGES val:22 [ 63.354185] BUG: Bad rss-counter state mm:00000000d181d40c type:MM_FILEPAGES val:33 [ 63.355290] BUG: Bad rss-counter state mm:00000000d181d40c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60463' (ECDSA) to the list of known hosts. 2023/06/20 20:08:09 fuzzer started 2023/06/20 20:08:09 dialing manager at localhost:36067 2023/06/20 20:08:09 checking machine... 2023/06/20 20:08:09 checking revisions... [ 64.066231] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:08:09 testing simple program... [ 64.126862] cgroup: Unknown subsys name 'net' [ 64.194586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:08:09 Registers: info registers vcpu 0 RAX=0000002a60318200 RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000002a RSI=ffff88806ce28140 RDI=000000000005362f RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000eeb1f R11=ffff88806ce09ff8 R12=000000000005362f R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000012 [----A--] 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=00007f03cf356f10 CR3=00000000180b2000 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=2039303a38303a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a38303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015809b40 RSI=ffffffff811431df RDI=0000000000000006 RBP=000000000d7f5500 RSP=ffff88801bd9fb68 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000800 R14=0000000000000000 R15=ffff88800c797000 RIP=ffffffff814c0864 RFL=00000256 [---ZAP-] 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 00007ff5d6400900 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=00007ff5d69b7618 CR3=000000000e780000 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