syzkaller login: [ 69.043930] BUG: Bad rss-counter state mm:0000000066b356fc type:MM_FILEPAGES val:33 [ 69.045080] BUG: Bad rss-counter state mm:0000000066b356fc type:MM_ANONPAGES val:22 [ 69.216762] ================================================================== [ 69.217756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.218761] Read of size 8 at addr ffff88801646e3f8 by task sshd/227 [ 69.219757] [ 69.219994] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.220946] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.222019] Call Trace: [ 69.222364] [ 69.222673] dump_stack_lvl+0x91/0xf0 [ 69.223208] print_report+0xcc/0x620 [ 69.223729] ? __virt_addr_valid+0x102/0x340 [ 69.224328] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.225017] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.225683] kasan_report+0xbe/0xf0 [ 69.226212] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.226899] vma_interval_tree_remove+0xc75/0xec0 [ 69.227562] vma_prepare+0xc54/0x11a0 [ 69.228083] __split_vma+0x5af/0x950 [ 69.228606] ? __pfx___split_vma+0x10/0x10 [ 69.229202] ? find_held_lock+0x2c/0x110 [ 69.229781] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.230411] ? lock_is_held_type+0x9f/0x120 [ 69.231008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.231676] ? mtree_range_walk+0x632/0x900 [ 69.232285] ? mas_walk+0x5c7/0x7c0 [ 69.232831] do_vmi_munmap+0x1f1/0x2b0 [ 69.233371] mmap_region+0x1f9/0x2660 [ 69.233907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.234452] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.235217] ? __pfx_lock_acquire+0x10/0x10 [ 69.235794] ? __pfx_mmap_region+0x10/0x10 [ 69.236363] ? security_mmap_addr+0x7d/0xa0 [ 69.236952] ? get_unmapped_area+0x1f5/0x3f0 [ 69.237545] do_mmap+0x854/0xf00 [ 69.238023] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.238561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.239171] ksys_mmap_pgoff+0x3af/0x500 [ 69.239729] do_syscall_64+0x3f/0x90 [ 69.240256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.240988] RIP: 0033:0x7f51076ddd82 [ 69.241479] 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 [ 69.243817] RSP: 002b:00007ffc011f4cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.244834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51076ddd82 [ 69.245779] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5106b17000 [ 69.246721] RBP: 00007f5106b17000 R08: 0000000000000009 R09: 0000000000001000 [ 69.247659] R10: 0000000000000812 R11: 0000000000000206 R12: 000056304e3d9ec0 [ 69.248608] R13: 00007ffc011f4cd0 R14: 00007ffc011f4d00 R15: 00007ffc011f5060 [ 69.249567] [ 69.249892] [ 69.250130] Allocated by task 220: [ 69.250612] kasan_save_stack+0x22/0x50 [ 69.251175] kasan_set_track+0x25/0x30 [ 69.251723] __kasan_slab_alloc+0x59/0x70 [ 69.252309] kmem_cache_alloc+0x16b/0x370 [ 69.252910] vm_area_dup+0x20/0x160 [ 69.253413] __split_vma+0x170/0x950 [ 69.253929] split_vma+0xc6/0x110 [ 69.254418] mprotect_fixup+0x8d2/0xb30 [ 69.254981] do_mprotect_pkey+0x87e/0xd40 [ 69.255555] __x64_sys_mprotect+0x78/0xc0 [ 69.256139] do_syscall_64+0x3f/0x90 [ 69.256666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.257391] [ 69.257625] Freed by task 220: [ 69.258067] kasan_save_stack+0x22/0x50 [ 69.258621] kasan_set_track+0x25/0x30 [ 69.259174] kasan_save_free_info+0x2b/0x50 [ 69.259771] __kasan_slab_free+0x10a/0x190 [ 69.260355] kmem_cache_free+0x10d/0x4d0 [ 69.260986] rcu_core+0x8c8/0x2860 [ 69.261475] __do_softirq+0x1b7/0x7d4 [ 69.262003] [ 69.262240] Last potentially related work creation: [ 69.262881] kasan_save_stack+0x22/0x50 [ 69.263435] __kasan_record_aux_stack+0x8e/0xa0 [ 69.264073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.264798] remove_vma+0x139/0x170 [ 69.265302] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.265915] do_vmi_munmap+0x1f1/0x2b0 [ 69.266454] __vm_munmap+0x138/0x3a0 [ 69.266967] __x64_sys_munmap+0x59/0x80 [ 69.267517] do_syscall_64+0x3f/0x90 [ 69.268037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.268748] [ 69.268992] The buggy address belongs to the object at ffff88801646e3a0 [ 69.268992] which belongs to the cache vm_area_struct of size 168 [ 69.270600] The buggy address is located 88 bytes inside of [ 69.270600] freed 168-byte region [ffff88801646e3a0, ffff88801646e448) [ 69.272151] [ 69.272388] The buggy address belongs to the physical page: [ 69.273144] page:00000000f729c3b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1646e [ 69.274346] memcg:ffff88800e655b01 [ 69.274823] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.275531] page_type: 0xffffffff() [ 69.276031] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.277057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e655b01 [ 69.278059] page dumped because: kasan: bad access detected [ 69.278788] [ 69.279024] Memory state around the buggy address: [ 69.279664] ffff88801646e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 69.280615] ffff88801646e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 69.281568] >ffff88801646e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 69.282518] ^ [ 69.283453] ffff88801646e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 69.284397] ffff88801646e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.285353] ================================================================== [ 69.286401] Disabling lock debugging due to kernel taint [ 71.498725] BUG: Bad rss-counter state mm:0000000022b6dea5 type:MM_FILEPAGES val:33 [ 71.499345] BUG: Bad rss-counter state mm:0000000022b6dea5 type:MM_ANONPAGES val:22 [ 72.002350] BUG: Bad rss-counter state mm:00000000a20999ac type:MM_FILEPAGES val:33 [ 72.003493] BUG: Bad rss-counter state mm:00000000a20999ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2023' (ECDSA) to the list of known hosts. 2023/06/21 03:23:52 fuzzer started 2023/06/21 03:23:52 dialing manager at localhost:36067 2023/06/21 03:23:52 checking machine... 2023/06/21 03:23:52 checking revisions... [ 72.669321] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:23:52 testing simple program... [ 72.725907] cgroup: Unknown subsys name 'net' [ 72.764170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:23:52 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=0000000000000001 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=00007ffd615e5cd8 CR3=0000000005482000 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=00007f3a23eae510000055cbec2ae790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008fde9b0 RCX=0000000000000000 RDX=ffff888019e6d1c0 RSI=ffff888010227cc0 RDI=ffff88800e88fcf0 RBP=ffff888010227cc0 RSP=ffff88800e88fc98 R8 =0000000000000005 R9 =0000000000000000 R10=00000000ffffffff R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000001 R14=00000000ffffffff R15=0000562163ed0000 RIP=ffffffff8140d636 RFL=00000202 [-------] 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 00007fb01cd29700 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=00007f0fa6305ce0 CR3=00000000146be000 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=33323a3330203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3733325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323332 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000