syzkaller login: [ 30.910428] BUG: Bad rss-counter state mm:0000000032f03c2a type:MM_FILEPAGES val:33 [ 30.911458] BUG: Bad rss-counter state mm:0000000032f03c2a type:MM_ANONPAGES val:22 [ 31.079552] ================================================================== [ 31.080671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.081665] Read of size 8 at addr ffff888015a3ba50 by task sshd/221 [ 31.082546] [ 31.082774] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.083656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.084689] Call Trace: [ 31.085010] [ 31.085302] dump_stack_lvl+0x91/0xf0 [ 31.085803] print_report+0xcc/0x620 [ 31.086306] ? __virt_addr_valid+0x102/0x340 [ 31.086865] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.087499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088167] kasan_report+0xbe/0xf0 [ 31.088671] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089313] vma_interval_tree_remove+0xc75/0xec0 [ 31.089943] vma_prepare+0xc54/0x11a0 [ 31.090445] __split_vma+0x5af/0x950 [ 31.090936] ? __pfx___split_vma+0x10/0x10 [ 31.091495] ? find_held_lock+0x2c/0x110 [ 31.092051] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.092680] ? lock_is_held_type+0x9f/0x120 [ 31.093258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.093901] ? mtree_range_walk+0x632/0x900 [ 31.094494] ? mas_walk+0x5c7/0x7c0 [ 31.094993] do_vmi_munmap+0x1f1/0x2b0 [ 31.095520] mmap_region+0x1f9/0x2660 [ 31.096025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.096566] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.097289] ? __pfx_lock_acquire+0x10/0x10 [ 31.097832] ? __pfx_mmap_region+0x10/0x10 [ 31.098370] ? security_mmap_addr+0x7d/0xa0 [ 31.098907] ? get_unmapped_area+0x1f5/0x3f0 [ 31.099469] do_mmap+0x854/0xf00 [ 31.099913] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.100431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.101001] ksys_mmap_pgoff+0x3af/0x500 [ 31.101521] do_syscall_64+0x3f/0x90 [ 31.102009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102665] RIP: 0033:0x7fe763301d82 [ 31.103139] 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 [ 31.105276] RSP: 002b:00007ffc6fd2b658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.106190] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe763301d82 [ 31.107041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe76273b000 [ 31.107906] RBP: 00007fe76273b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.108785] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9d6d8fec0 [ 31.109646] R13: 00007ffc6fd2b670 R14: 00007ffc6fd2b6a0 R15: 00007ffc6fd2ba00 [ 31.110513] [ 31.110810] [ 31.111031] Allocated by task 214: [ 31.111460] kasan_save_stack+0x22/0x50 [ 31.111969] kasan_set_track+0x25/0x30 [ 31.112484] __kasan_slab_alloc+0x59/0x70 [ 31.113013] kmem_cache_alloc+0x16b/0x370 [ 31.113537] vm_area_dup+0x20/0x160 [ 31.113991] __split_vma+0x170/0x950 [ 31.114469] split_vma+0xc6/0x110 [ 31.114912] mprotect_fixup+0x8d2/0xb30 [ 31.115417] do_mprotect_pkey+0x87e/0xd40 [ 31.115936] __x64_sys_mprotect+0x78/0xc0 [ 31.116473] do_syscall_64+0x3f/0x90 [ 31.116960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.117612] [ 31.117828] Freed by task 13: [ 31.118214] kasan_save_stack+0x22/0x50 [ 31.118726] kasan_set_track+0x25/0x30 [ 31.119226] kasan_save_free_info+0x2b/0x50 [ 31.119771] __kasan_slab_free+0x10a/0x190 [ 31.120311] kmem_cache_free+0x10d/0x4d0 [ 31.120843] rcu_core+0x8c8/0x2860 [ 31.121300] __do_softirq+0x1b7/0x7d4 [ 31.121781] [ 31.122002] Last potentially related work creation: [ 31.122590] kasan_save_stack+0x22/0x50 [ 31.123101] __kasan_record_aux_stack+0x8e/0xa0 [ 31.123677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.124325] remove_vma+0x139/0x170 [ 31.124792] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.125348] do_vmi_munmap+0x1f1/0x2b0 [ 31.125839] __vm_munmap+0x138/0x3a0 [ 31.126314] __x64_sys_munmap+0x59/0x80 [ 31.126817] do_syscall_64+0x3f/0x90 [ 31.127306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.127958] [ 31.128178] The buggy address belongs to the object at ffff888015a3b9f8 [ 31.128178] which belongs to the cache vm_area_struct of size 168 [ 31.129667] The buggy address is located 88 bytes inside of [ 31.129667] freed 168-byte region [ffff888015a3b9f8, ffff888015a3baa0) [ 31.131080] [ 31.131296] The buggy address belongs to the physical page: [ 31.131955] page:00000000cfdde4ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a3b [ 31.133082] memcg:ffff888015a32501 [ 31.133510] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.134164] page_type: 0xffffffff() [ 31.134617] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b6080 dead000000000002 [ 31.135546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a32501 [ 31.136484] page dumped because: kasan: bad access detected [ 31.137156] [ 31.137378] Memory state around the buggy address: [ 31.137975] ffff888015a3b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.138853] ffff888015a3b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.139724] >ffff888015a3ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.140594] ^ [ 31.141307] ffff888015a3ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.142175] ffff888015a3bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.143029] ================================================================== [ 31.144050] Disabling lock debugging due to kernel taint [ 32.892000] BUG: Bad rss-counter state mm:0000000061e61c0d type:MM_FILEPAGES val:33 [ 32.892803] BUG: Bad rss-counter state mm:0000000061e61c0d type:MM_ANONPAGES val:22 [ 33.270051] BUG: Bad rss-counter state mm:0000000068992791 type:MM_FILEPAGES val:33 [ 33.270740] BUG: Bad rss-counter state mm:0000000068992791 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27710' (ECDSA) to the list of known hosts. 2023/06/21 04:17:51 fuzzer started 2023/06/21 04:17:51 dialing manager at localhost:36067 2023/06/21 04:17:51 checking machine... 2023/06/21 04:17:51 checking revisions... [ 34.001082] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:17:51 testing simple program... [ 34.044965] cgroup: Unknown subsys name 'net' [ 34.084973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:17:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f2ef8134f60 CR3=000000000d4f8000 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=064a0a4e2ab4e49f574f1a9050aefdec XMM02=000000000011dae0ec2efd57dc4c00df XMM03=00000000001216a8b6e7730ea58efcd1 XMM04=d00d4c4b3170554700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131220 XMM06=8a632279b21abf5e00000000001303f8 XMM07=e042d86d42eb936e0000000000121928 XMM08=b6e7730ea58efcd1000000000011db40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fec69a36618 CR3=0000000019e80000 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=2030353a37313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a37313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000