syzkaller login: [ 30.707724] BUG: Bad rss-counter state mm:000000006e648214 type:MM_FILEPAGES val:33 [ 30.708915] BUG: Bad rss-counter state mm:000000006e648214 type:MM_ANONPAGES val:22 [ 30.744824] ================================================================== [ 30.745549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.746283] Read of size 8 at addr ffff888019dd1140 by task sshd/220 [ 30.746884] [ 30.747062] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.747742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.748575] Call Trace: [ 30.748826] [ 30.749052] dump_stack_lvl+0x91/0xf0 [ 30.749457] print_report+0xcc/0x620 [ 30.749841] ? __virt_addr_valid+0x102/0x340 [ 30.750279] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751266] kasan_report+0xbe/0xf0 [ 30.751643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752132] vma_interval_tree_remove+0xc75/0xec0 [ 30.752612] vma_prepare+0xc54/0x11a0 [ 30.752994] __split_vma+0x5af/0x950 [ 30.753396] ? __pfx___split_vma+0x10/0x10 [ 30.753817] ? find_held_lock+0x2c/0x110 [ 30.754238] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754690] ? lock_is_held_type+0x9f/0x120 [ 30.755125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755610] ? mtree_range_walk+0x632/0x900 [ 30.756055] ? mas_walk+0x5c7/0x7c0 [ 30.756438] do_vmi_munmap+0x1f1/0x2b0 [ 30.756827] mmap_region+0x1f9/0x2660 [ 30.757225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.757635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.758210] ? __pfx_lock_acquire+0x10/0x10 [ 30.758637] ? __pfx_mmap_region+0x10/0x10 [ 30.759059] ? security_mmap_addr+0x7d/0xa0 [ 30.759492] ? get_unmapped_area+0x1f5/0x3f0 [ 30.759936] do_mmap+0x854/0xf00 [ 30.760292] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.760685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.761136] ksys_mmap_pgoff+0x3af/0x500 [ 30.761555] do_syscall_64+0x3f/0x90 [ 30.761939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762459] RIP: 0033:0x7f59bf7b5d82 [ 30.762820] 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 [ 30.764499] RSP: 002b:00007ffc5e326868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.765236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59bf7b5d82 [ 30.765917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59bebef000 [ 30.766583] RBP: 00007f59bebef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.767262] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e77bbf8b20 [ 30.767928] R13: 00007ffc5e326880 R14: 00007ffc5e3268b0 R15: 00007ffc5e326c10 [ 30.768612] [ 30.768842] [ 30.769011] Allocated by task 213: [ 30.769364] kasan_save_stack+0x22/0x50 [ 30.769764] kasan_set_track+0x25/0x30 [ 30.770157] __kasan_slab_alloc+0x59/0x70 [ 30.770574] kmem_cache_alloc+0x16b/0x370 [ 30.770985] vm_area_dup+0x20/0x160 [ 30.771351] __split_vma+0x170/0x950 [ 30.771750] split_vma+0xc6/0x110 [ 30.772101] mprotect_fixup+0x8d2/0xb30 [ 30.772498] do_mprotect_pkey+0x87e/0xd40 [ 30.772911] __x64_sys_mprotect+0x78/0xc0 [ 30.773341] do_syscall_64+0x3f/0x90 [ 30.773715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774228] [ 30.774398] Freed by task 213: [ 30.774716] kasan_save_stack+0x22/0x50 [ 30.775117] kasan_set_track+0x25/0x30 [ 30.775509] kasan_save_free_info+0x2b/0x50 [ 30.775928] __kasan_slab_free+0x10a/0x190 [ 30.776350] kmem_cache_free+0x10d/0x4d0 [ 30.776751] rcu_core+0x8c8/0x2860 [ 30.777098] __do_softirq+0x1b7/0x7d4 [ 30.777487] [ 30.777661] Last potentially related work creation: [ 30.778118] kasan_save_stack+0x22/0x50 [ 30.778512] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779475] remove_vma+0x139/0x170 [ 30.779854] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780283] do_vmi_munmap+0x1f1/0x2b0 [ 30.780649] __vm_munmap+0x138/0x3a0 [ 30.781003] __x64_sys_munmap+0x59/0x80 [ 30.781392] do_syscall_64+0x3f/0x90 [ 30.781749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782268] [ 30.782451] The buggy address belongs to the object at ffff888019dd10e8 [ 30.782451] which belongs to the cache vm_area_struct of size 168 [ 30.783655] The buggy address is located 88 bytes inside of [ 30.783655] freed 168-byte region [ffff888019dd10e8, ffff888019dd1190) [ 30.784864] [ 30.785035] The buggy address belongs to the physical page: [ 30.785557] page:00000000a35c4d2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dd1 [ 30.786408] memcg:ffff88800c550501 [ 30.786740] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.787250] page_type: 0xffffffff() [ 30.787607] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.788320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c550501 [ 30.789021] page dumped because: kasan: bad access detected [ 30.789651] [ 30.789815] Memory state around the buggy address: [ 30.790278] ffff888019dd1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.791106] ffff888019dd1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.791887] >ffff888019dd1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.792691] ^ [ 30.793183] ffff888019dd1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.793845] ffff888019dd1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.794481] ================================================================== [ 30.795360] Disabling lock debugging due to kernel taint [ 32.719272] BUG: Bad rss-counter state mm:000000000ed3be10 type:MM_FILEPAGES val:32 [ 32.720653] BUG: Bad rss-counter state mm:000000000ed3be10 type:MM_ANONPAGES val:22 [ 33.196752] BUG: Bad rss-counter state mm:00000000183e7566 type:MM_FILEPAGES val:33 [ 33.197807] BUG: Bad rss-counter state mm:00000000183e7566 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27631' (ECDSA) to the list of known hosts. 2023/06/21 09:33:34 fuzzer started 2023/06/21 09:33:34 dialing manager at localhost:36067 2023/06/21 09:33:34 checking machine... 2023/06/21 09:33:34 checking revisions... [ 33.900634] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:33:34 testing simple program... [ 33.952593] cgroup: Unknown subsys name 'net' [ 34.011904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:33:34 Registers: info registers vcpu 0 RAX=ffffed100393cf7f RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81803bfc RDI=ffffffff8560b640 RBP=1ffff1100393cf7f RSP=ffff88801c9e7be8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff81803bfc R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff812d86a2 RFL=00000282 [--S----] 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 00007f8e1c402900 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=00007f8e1c9ba0b0 CR3=000000001ca38000 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=33333a3930203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303438 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000599a80 RBX=ffff88801666a1b0 RCX=0000000000599a80 RDX=0000000000000000 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806cf09dc0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffff88800844f780 R13=ffffea0000665600 R14=ffffffff813782f8 R15=ffff88800ece1880 RIP=ffffffff8180ef91 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 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=00007fee2763d6d0 CR3=0000000017da2000 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=2033333a33333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a33333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000