syzkaller login: [ 28.753310] BUG: Bad rss-counter state mm:00000000f31dbd32 type:MM_FILEPAGES val:33 [ 28.754303] BUG: Bad rss-counter state mm:00000000f31dbd32 type:MM_ANONPAGES val:22 [ 28.937773] ================================================================== [ 28.939056] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.940225] Read of size 8 at addr ffff88800d983880 by task sshd/220 [ 28.941000] [ 28.941220] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.942085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.943063] Call Trace: [ 28.943405] [ 28.943726] dump_stack_lvl+0x91/0xf0 [ 28.944223] print_report+0xcc/0x620 [ 28.944748] ? __virt_addr_valid+0x102/0x340 [ 28.945295] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.945919] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.946551] kasan_report+0xbe/0xf0 [ 28.947023] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.947668] vma_interval_tree_remove+0xc75/0xec0 [ 28.948268] vma_prepare+0xc54/0x11a0 [ 28.948753] __split_vma+0x5af/0x950 [ 28.949219] ? __pfx___split_vma+0x10/0x10 [ 28.949825] ? find_held_lock+0x2c/0x110 [ 28.950350] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.950915] ? lock_is_held_type+0x9f/0x120 [ 28.951460] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.952101] ? mtree_range_walk+0x632/0x900 [ 28.952665] ? mas_walk+0x5c7/0x7c0 [ 28.953144] do_vmi_munmap+0x1f1/0x2b0 [ 28.953649] mmap_region+0x1f9/0x2660 [ 28.954128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.954651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.955374] ? __pfx_lock_acquire+0x10/0x10 [ 28.955920] ? __pfx_mmap_region+0x10/0x10 [ 28.956489] ? security_mmap_addr+0x7d/0xa0 [ 28.957021] ? get_unmapped_area+0x1f5/0x3f0 [ 28.957588] do_mmap+0x854/0xf00 [ 28.958026] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.958558] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.959122] ksys_mmap_pgoff+0x3af/0x500 [ 28.959748] do_syscall_64+0x3f/0x90 [ 28.960387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.961272] RIP: 0033:0x7f7641afed82 [ 28.961906] 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 [ 28.964830] RSP: 002b:00007ffecbafffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.966063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7641afed82 [ 28.967209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7640f38000 [ 28.968386] RBP: 00007f7640f38000 R08: 0000000000000009 R09: 0000000000001000 [ 28.969549] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f80558f70 [ 28.970690] R13: 00007ffecbafffc0 R14: 00007ffecbaffff0 R15: 00007ffecbb00350 [ 28.971857] [ 28.972263] [ 28.972550] Allocated by task 213: [ 28.973132] kasan_save_stack+0x22/0x50 [ 28.973723] kasan_set_track+0x25/0x30 [ 28.974220] __kasan_slab_alloc+0x59/0x70 [ 28.974767] kmem_cache_alloc+0x16b/0x370 [ 28.975279] vm_area_dup+0x20/0x160 [ 28.975788] __split_vma+0x170/0x950 [ 28.976257] split_vma+0xc6/0x110 [ 28.976715] mprotect_fixup+0x8d2/0xb30 [ 28.977213] do_mprotect_pkey+0x87e/0xd40 [ 28.977745] __x64_sys_mprotect+0x78/0xc0 [ 28.978265] do_syscall_64+0x3f/0x90 [ 28.978803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.979486] [ 28.979715] Freed by task 203: [ 28.980204] kasan_save_stack+0x22/0x50 [ 28.980734] kasan_set_track+0x25/0x30 [ 28.981227] kasan_save_free_info+0x2b/0x50 [ 28.981778] __kasan_slab_free+0x10a/0x190 [ 28.982316] kmem_cache_free+0x10d/0x4d0 [ 28.982837] rcu_core+0x8c8/0x2860 [ 28.983276] __do_softirq+0x1b7/0x7d4 [ 28.983788] [ 28.984003] Last potentially related work creation: [ 28.984600] kasan_save_stack+0x22/0x50 [ 28.985103] __kasan_record_aux_stack+0x8e/0xa0 [ 28.985694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.986350] remove_vma+0x139/0x170 [ 28.986822] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.987404] do_vmi_munmap+0x1f1/0x2b0 [ 28.987917] __vm_munmap+0x138/0x3a0 [ 28.988399] __x64_sys_munmap+0x59/0x80 [ 28.988902] do_syscall_64+0x3f/0x90 [ 28.989390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.990030] [ 28.990246] The buggy address belongs to the object at ffff88800d983828 [ 28.990246] which belongs to the cache vm_area_struct of size 168 [ 28.991765] The buggy address is located 88 bytes inside of [ 28.991765] freed 168-byte region [ffff88800d983828, ffff88800d9838d0) [ 28.993205] [ 28.993434] The buggy address belongs to the physical page: [ 28.994100] page:00000000c43d03f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd983 [ 28.995186] memcg:ffff88800e940d01 [ 28.995647] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.996300] page_type: 0xffffffff() [ 28.996779] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.997736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e940d01 [ 28.998645] page dumped because: kasan: bad access detected [ 28.999296] [ 28.999514] Memory state around the buggy address: [ 29.000102] ffff88800d983780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.000946] ffff88800d983800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.001821] >ffff88800d983880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.002667] ^ [ 29.003074] ffff88800d983900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.003957] ffff88800d983980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.004810] ================================================================== [ 29.005833] Disabling lock debugging due to kernel taint [ 31.730727] BUG: Bad rss-counter state mm:00000000c299d7a8 type:MM_FILEPAGES val:33 [ 31.731735] BUG: Bad rss-counter state mm:00000000c299d7a8 type:MM_ANONPAGES val:22 [ 32.246520] BUG: Bad rss-counter state mm:0000000011180b35 type:MM_FILEPAGES val:33 [ 32.247724] BUG: Bad rss-counter state mm:0000000011180b35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50727' (ECDSA) to the list of known hosts. 2023/06/20 13:39:16 fuzzer started 2023/06/20 13:39:17 dialing manager at localhost:36067 2023/06/20 13:39:17 checking machine... 2023/06/20 13:39:17 checking revisions... [ 32.882725] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:39:17 testing simple program... [ 32.931606] cgroup: Unknown subsys name 'net' [ 32.983530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:39:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880140e4068 RCX=1ffff1100281c814 RDX=ffff8880140e4078 RSI=ffffffff87b89f80 RDI=ffff88800d93a408 RBP=ffff88800d93a3f8 RSP=ffff88800c65f788 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880140e4ea8 R13=0000000000000000 R14=ffff8880140e4078 R15=ffff8880140e4068 RIP=ffffffff844d3ed2 RFL=00000013 [----A-C] 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 00007fb2d14c0900 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=00007ffc06175000 CR3=0000000010066000 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=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 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=0000000000000001 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=00007f361cdde018 CR3=000000000d5c6000 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=9c11643af79eb7bb814f18b5d6d9893b XMM02=2c67c8bc2e329bc3000000000011ba80 XMM03=fb795ef6d65770560000000000122e90 XMM04=f47ad9cb79a404e500000000000ae988 XMM05=19e9129bd510f2350000000000132d08 XMM06=a52cb584a95a9d010000000000131b70 XMM07=e042d86d42eb936e0000000000123110 XMM08=777426126b435ffa000000000011bae0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000