syzkaller login: [ 31.210601] BUG: Bad rss-counter state mm:00000000a54afea8 type:MM_FILEPAGES val:33 [ 31.212018] BUG: Bad rss-counter state mm:00000000a54afea8 type:MM_ANONPAGES val:22 [ 31.371075] ================================================================== [ 31.371993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.372937] Read of size 8 at addr ffff8880101a54e0 by task sshd/220 [ 31.373718] [ 31.374023] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.374885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.375856] Call Trace: [ 31.376179] [ 31.376465] dump_stack_lvl+0x91/0xf0 [ 31.376990] print_report+0xcc/0x620 [ 31.377472] ? __virt_addr_valid+0x102/0x340 [ 31.378017] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.378638] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379248] kasan_report+0xbe/0xf0 [ 31.379728] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.380342] vma_interval_tree_remove+0xc75/0xec0 [ 31.380958] vma_prepare+0xc54/0x11a0 [ 31.381433] __split_vma+0x5af/0x950 [ 31.381904] ? __pfx___split_vma+0x10/0x10 [ 31.382427] ? find_held_lock+0x2c/0x110 [ 31.382957] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.383527] ? lock_is_held_type+0x9f/0x120 [ 31.384068] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.384675] ? mtree_range_walk+0x632/0x900 [ 31.385254] ? mas_walk+0x5c7/0x7c0 [ 31.385731] do_vmi_munmap+0x1f1/0x2b0 [ 31.386225] mmap_region+0x1f9/0x2660 [ 31.386710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.387226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.387940] ? __pfx_lock_acquire+0x10/0x10 [ 31.388474] ? __pfx_mmap_region+0x10/0x10 [ 31.389027] ? security_mmap_addr+0x7d/0xa0 [ 31.389561] ? get_unmapped_area+0x1f5/0x3f0 [ 31.390109] do_mmap+0x854/0xf00 [ 31.390550] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.391064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.391642] ksys_mmap_pgoff+0x3af/0x500 [ 31.392157] do_syscall_64+0x3f/0x90 [ 31.392649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393466] RIP: 0033:0x7f8842514d82 [ 31.394062] 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 [ 31.396756] RSP: 002b:00007ffcc8e18b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.397925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8842514d82 [ 31.398999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f884194e000 [ 31.400065] RBP: 00007f884194e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.401135] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589ade05f70 [ 31.402147] R13: 00007ffcc8e18b90 R14: 00007ffcc8e18bc0 R15: 00007ffcc8e18f20 [ 31.403155] [ 31.403497] [ 31.403749] Allocated by task 213: [ 31.404255] kasan_save_stack+0x22/0x50 [ 31.404851] kasan_set_track+0x25/0x30 [ 31.405448] __kasan_slab_alloc+0x59/0x70 [ 31.405973] kmem_cache_alloc+0x16b/0x370 [ 31.406494] vm_area_dup+0x20/0x160 [ 31.406959] __split_vma+0x170/0x950 [ 31.407439] split_vma+0xc6/0x110 [ 31.407881] mprotect_fixup+0x8d2/0xb30 [ 31.408405] do_mprotect_pkey+0x87e/0xd40 [ 31.408935] __x64_sys_mprotect+0x78/0xc0 [ 31.409472] do_syscall_64+0x3f/0x90 [ 31.409954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410605] [ 31.410822] Freed by task 203: [ 31.411219] kasan_save_stack+0x22/0x50 [ 31.411725] kasan_set_track+0x25/0x30 [ 31.412221] kasan_save_free_info+0x2b/0x50 [ 31.412754] __kasan_slab_free+0x10a/0x190 [ 31.413295] kmem_cache_free+0x10d/0x4d0 [ 31.413803] rcu_core+0x8c8/0x2860 [ 31.414251] __do_softirq+0x1b7/0x7d4 [ 31.414741] [ 31.414958] Last potentially related work creation: [ 31.415552] kasan_save_stack+0x22/0x50 [ 31.416054] __kasan_record_aux_stack+0x8e/0xa0 [ 31.416625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.417287] remove_vma+0x139/0x170 [ 31.417736] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.418289] do_vmi_munmap+0x1f1/0x2b0 [ 31.418773] __vm_munmap+0x138/0x3a0 [ 31.419249] __x64_sys_munmap+0x59/0x80 [ 31.419757] do_syscall_64+0x3f/0x90 [ 31.420229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.420884] [ 31.421099] The buggy address belongs to the object at ffff8880101a5488 [ 31.421099] which belongs to the cache vm_area_struct of size 168 [ 31.422556] The buggy address is located 88 bytes inside of [ 31.422556] freed 168-byte region [ffff8880101a5488, ffff8880101a5530) [ 31.423946] [ 31.424160] The buggy address belongs to the physical page: [ 31.424817] page:0000000070771fa9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101a5 [ 31.425913] memcg:ffff88800d027d01 [ 31.426338] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.426986] page_type: 0xffffffff() [ 31.427440] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.428371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d027d01 [ 31.429333] page dumped because: kasan: bad access detected [ 31.430008] [ 31.430221] Memory state around the buggy address: [ 31.430807] ffff8880101a5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.431686] ffff8880101a5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.432555] >ffff8880101a5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.433409] ^ [ 31.434173] ffff8880101a5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.435038] ffff8880101a5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.435893] ================================================================== [ 31.436963] Disabling lock debugging due to kernel taint [ 33.266691] BUG: Bad rss-counter state mm:00000000b3d6ffc8 type:MM_FILEPAGES val:33 [ 33.267845] BUG: Bad rss-counter state mm:00000000b3d6ffc8 type:MM_ANONPAGES val:22 [ 33.744494] BUG: Bad rss-counter state mm:000000007acbfa59 type:MM_FILEPAGES val:33 [ 33.745701] BUG: Bad rss-counter state mm:000000007acbfa59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12250' (ECDSA) to the list of known hosts. 2023/06/19 22:40:22 fuzzer started 2023/06/19 22:40:23 dialing manager at localhost:44161 2023/06/19 22:40:23 checking machine... 2023/06/19 22:40:23 checking revisions... [ 34.461670] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:40:23 testing simple program... [ 34.502824] cgroup: Unknown subsys name 'net' [ 34.545142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:40:22 Registers: info registers vcpu 0 RAX=000055ee37301e80 RBX=000055ee372ead30 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000009 RSP=00007ffe5e326030 R8 =0000000000000000 R9 =0000000000000000 R10=000055ee372ea2b0 R11=0000000000000000 R12=0000000000000020 R13=000055ee37316340 R14=000055ee372ef730 R15=000055ee37318ad0 RIP=000055ee35ee6053 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f81fc10b8c0 00000000 00000000 GS =0000 0000000000000000 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=00007ffc6de6fe98 CR3=000000000f56e000 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=0000000000000000000000ff00000000 XMM02=ffffff0f0e0d0c0b0a09080706050403 XMM03=696e656420737365636341002f737973 XMM04=000055ee37318ce0000055ee37318cc0 XMM05=00ffff000101020100000004ffffffff XMM06=0000000300000000000055ee3731b290 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007fe8502c62fd RSP=ffff88806cf099d8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007fe8502c62fd R13=0000000000000000 R14=ffff888016cf9b40 R15=ffff88800edbdb80 RIP=ffffffff814c8416 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 00007fe84f9fc900 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=00007f078d202650 CR3=000000000d98a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=1cd750a22854e75800000000000ae988 XMM05=d5475a04c10b94900000000000135b78 XMM06=4fda316b135da52b0000000000134968 XMM07=fb795ef6d65770560000000000124ed8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000