syzkaller login: [ 38.922658] BUG: Bad rss-counter state mm:00000000d7c047a6 type:MM_FILEPAGES val:33 [ 38.923988] BUG: Bad rss-counter state mm:00000000d7c047a6 type:MM_ANONPAGES val:22 [ 39.067394] ================================================================== [ 39.068317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.069254] Read of size 8 at addr ffff888014555d08 by task sshd/225 [ 39.070034] [ 39.070253] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.071275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.072249] Call Trace: [ 39.072566] [ 39.072863] dump_stack_lvl+0x91/0xf0 [ 39.073355] print_report+0xcc/0x620 [ 39.073841] ? __virt_addr_valid+0x102/0x340 [ 39.074396] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.075034] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.075649] kasan_report+0xbe/0xf0 [ 39.076129] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.076749] vma_interval_tree_remove+0xc75/0xec0 [ 39.077352] vma_prepare+0xc54/0x11a0 [ 39.077834] __split_vma+0x5af/0x950 [ 39.078300] ? __pfx___split_vma+0x10/0x10 [ 39.078849] ? find_held_lock+0x2c/0x110 [ 39.079366] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.079930] ? lock_is_held_type+0x9f/0x120 [ 39.080464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.081069] ? mtree_range_walk+0x632/0x900 [ 39.081615] ? mas_walk+0x5c7/0x7c0 [ 39.082090] do_vmi_munmap+0x1f1/0x2b0 [ 39.082587] mmap_region+0x1f9/0x2660 [ 39.083073] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.083582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.084295] ? __pfx_lock_acquire+0x10/0x10 [ 39.084826] ? __pfx_mmap_region+0x10/0x10 [ 39.085353] ? security_mmap_addr+0x7d/0xa0 [ 39.085877] ? get_unmapped_area+0x1f5/0x3f0 [ 39.086425] do_mmap+0x854/0xf00 [ 39.086875] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.087368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.087931] ksys_mmap_pgoff+0x3af/0x500 [ 39.088435] do_syscall_64+0x3f/0x90 [ 39.088914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.089572] RIP: 0033:0x7f4bedcc6d82 [ 39.090030] 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 [ 39.092167] RSP: 002b:00007ffec18b5e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.093066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4bedcc6d82 [ 39.093906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4bed100000 [ 39.094758] RBP: 00007f4bed100000 R08: 0000000000000009 R09: 0000000000001000 [ 39.095613] R10: 0000000000000812 R11: 0000000000000206 R12: 000055643217af70 [ 39.096448] R13: 00007ffec18b5e50 R14: 00007ffec18b5e80 R15: 00007ffec18b61e0 [ 39.097297] [ 39.097590] [ 39.097803] Allocated by task 218: [ 39.098238] kasan_save_stack+0x22/0x50 [ 39.098761] kasan_set_track+0x25/0x30 [ 39.099251] __kasan_slab_alloc+0x59/0x70 [ 39.099772] kmem_cache_alloc+0x16b/0x370 [ 39.100284] vm_area_dup+0x20/0x160 [ 39.100733] __split_vma+0x170/0x950 [ 39.101202] split_vma+0xc6/0x110 [ 39.101646] mprotect_fixup+0x8d2/0xb30 [ 39.102146] do_mprotect_pkey+0x87e/0xd40 [ 39.102672] __x64_sys_mprotect+0x78/0xc0 [ 39.103195] do_syscall_64+0x3f/0x90 [ 39.103668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.104318] [ 39.104533] Freed by task 19: [ 39.104919] kasan_save_stack+0x22/0x50 [ 39.105423] kasan_set_track+0x25/0x30 [ 39.105916] kasan_save_free_info+0x2b/0x50 [ 39.106448] __kasan_slab_free+0x10a/0x190 [ 39.106997] kmem_cache_free+0x10d/0x4d0 [ 39.107517] rcu_core+0x8c8/0x2860 [ 39.107954] __do_softirq+0x1b7/0x7d4 [ 39.108444] [ 39.108656] Last potentially related work creation: [ 39.109237] kasan_save_stack+0x22/0x50 [ 39.109754] __kasan_record_aux_stack+0x8e/0xa0 [ 39.110331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.110995] remove_vma+0x139/0x170 [ 39.111564] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.112137] do_vmi_munmap+0x1f1/0x2b0 [ 39.112636] __vm_munmap+0x138/0x3a0 [ 39.113121] __x64_sys_munmap+0x59/0x80 [ 39.113621] do_syscall_64+0x3f/0x90 [ 39.114116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.114819] [ 39.115045] The buggy address belongs to the object at ffff888014555cb0 [ 39.115045] which belongs to the cache vm_area_struct of size 168 [ 39.116576] The buggy address is located 88 bytes inside of [ 39.116576] freed 168-byte region [ffff888014555cb0, ffff888014555d58) [ 39.118034] [ 39.118251] The buggy address belongs to the physical page: [ 39.118949] page:0000000051a2c863 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14555 [ 39.120076] memcg:ffff88800d8ac701 [ 39.120514] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.121194] page_type: 0xffffffff() [ 39.121662] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.122624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8ac701 [ 39.123560] page dumped because: kasan: bad access detected [ 39.124237] [ 39.124459] Memory state around the buggy address: [ 39.125053] ffff888014555c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.125940] ffff888014555c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.126840] >ffff888014555d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.127719] ^ [ 39.128167] ffff888014555d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.129053] ffff888014555e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.129914] ================================================================== [ 39.130915] Disabling lock debugging due to kernel taint [ 41.469036] BUG: Bad rss-counter state mm:000000003fcbc9dd type:MM_FILEPAGES val:33 [ 41.470081] BUG: Bad rss-counter state mm:000000003fcbc9dd type:MM_ANONPAGES val:22 [ 42.058690] BUG: Bad rss-counter state mm:00000000ea33d894 type:MM_FILEPAGES val:33 [ 42.059867] BUG: Bad rss-counter state mm:00000000ea33d894 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1738' (ECDSA) to the list of known hosts. 2023/06/21 05:50:25 fuzzer started 2023/06/21 05:50:25 dialing manager at localhost:36067 2023/06/21 05:50:25 checking machine... 2023/06/21 05:50:25 checking revisions... [ 42.719333] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:50:25 testing simple program... [ 42.760876] cgroup: Unknown subsys name 'net' [ 42.808301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:50:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e0875f0 RCX=ffff88800e0875f0 RDX=00000000800d000b RSI=ffff88800e0875f0 RDI=ffff88800844f780 RBP=ffff888019f2fc58 RSP=ffff888019f2fbc0 R8 =00000000800d000a R9 =0000000000000000 R10=ffffea00003821c0 R11=00000000800d000b R12=ffffea00003821c0 R13=ffff88800e0874c0 R14=00000000800d000a R15=ffff88800844f780 RIP=ffffffff81809672 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 00007f160af69900 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=00007f160b520618 CR3=000000000ee7e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f4beac08d80 CR3=000000000c932000 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=2034323a30353a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30353a3530203132 XMM08=00007fcaa001d5600000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000