syzkaller login: [ 35.711808] BUG: Bad rss-counter state mm:00000000df29abe6 type:MM_FILEPAGES val:33 [ 35.713074] BUG: Bad rss-counter state mm:00000000df29abe6 type:MM_ANONPAGES val:22 [ 35.752155] ================================================================== [ 35.753432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.754638] Read of size 8 at addr ffff888015b203f8 by task sshd/220 [ 35.755401] [ 35.755639] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.756630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.757635] Call Trace: [ 35.757952] [ 35.758229] dump_stack_lvl+0x91/0xf0 [ 35.758707] print_report+0xcc/0x620 [ 35.759189] ? __virt_addr_valid+0x102/0x340 [ 35.759732] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.760362] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.760981] kasan_report+0xbe/0xf0 [ 35.761450] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.762061] vma_interval_tree_remove+0xc75/0xec0 [ 35.762654] vma_prepare+0xc54/0x11a0 [ 35.763258] __split_vma+0x5af/0x950 [ 35.763723] ? __pfx___split_vma+0x10/0x10 [ 35.764241] ? find_held_lock+0x2c/0x110 [ 35.764767] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.765334] ? lock_is_held_type+0x9f/0x120 [ 35.765863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.766459] ? mtree_range_walk+0x632/0x900 [ 35.766996] ? mas_walk+0x5c7/0x7c0 [ 35.767460] do_vmi_munmap+0x1f1/0x2b0 [ 35.767952] mmap_region+0x1f9/0x2660 [ 35.768423] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.768936] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.769637] ? __pfx_lock_acquire+0x10/0x10 [ 35.770159] ? __pfx_mmap_region+0x10/0x10 [ 35.770680] ? security_mmap_addr+0x7d/0xa0 [ 35.771197] ? get_unmapped_area+0x1f5/0x3f0 [ 35.771735] do_mmap+0x854/0xf00 [ 35.772166] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.772654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.773224] ksys_mmap_pgoff+0x3af/0x500 [ 35.773722] do_syscall_64+0x3f/0x90 [ 35.774190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.774819] RIP: 0033:0x7f76faedad82 [ 35.775267] 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 [ 35.777351] RSP: 002b:00007ffe65de7218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.778229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76faedad82 [ 35.779058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76fa314000 [ 35.779879] RBP: 00007f76fa314000 R08: 0000000000000009 R09: 0000000000001000 [ 35.780705] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ada98fec0 [ 35.781530] R13: 00007ffe65de7230 R14: 00007ffe65de7260 R15: 00007ffe65de75c0 [ 35.782365] [ 35.782650] [ 35.782860] Allocated by task 212: [ 35.783276] kasan_save_stack+0x22/0x50 [ 35.783771] kasan_set_track+0x25/0x30 [ 35.784254] __kasan_slab_alloc+0x59/0x70 [ 35.784779] kmem_cache_alloc+0x16b/0x370 [ 35.785287] vm_area_dup+0x20/0x160 [ 35.785729] __split_vma+0x170/0x950 [ 35.786186] split_vma+0xc6/0x110 [ 35.786615] mprotect_fixup+0x8d2/0xb30 [ 35.787108] do_mprotect_pkey+0x87e/0xd40 [ 35.787613] __x64_sys_mprotect+0x78/0xc0 [ 35.788120] do_syscall_64+0x3f/0x90 [ 35.788583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.789217] [ 35.789427] Freed by task 212: [ 35.789808] kasan_save_stack+0x22/0x50 [ 35.790298] kasan_set_track+0x25/0x30 [ 35.790780] kasan_save_free_info+0x2b/0x50 [ 35.791298] __kasan_slab_free+0x10a/0x190 [ 35.791820] kmem_cache_free+0x10d/0x4d0 [ 35.792317] rcu_core+0x8c8/0x2860 [ 35.792767] __do_softirq+0x1b7/0x7d4 [ 35.793234] [ 35.793444] Last potentially related work creation: [ 35.794014] kasan_save_stack+0x22/0x50 [ 35.794503] __kasan_record_aux_stack+0x8e/0xa0 [ 35.795063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.795691] remove_vma+0x139/0x170 [ 35.796134] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.796677] do_vmi_munmap+0x1f1/0x2b0 [ 35.797159] __vm_munmap+0x138/0x3a0 [ 35.797618] __x64_sys_munmap+0x59/0x80 [ 35.798102] do_syscall_64+0x3f/0x90 [ 35.798565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.799190] [ 35.799400] The buggy address belongs to the object at ffff888015b203a0 [ 35.799400] which belongs to the cache vm_area_struct of size 168 [ 35.800848] The buggy address is located 88 bytes inside of [ 35.800848] freed 168-byte region [ffff888015b203a0, ffff888015b20448) [ 35.802220] [ 35.802431] The buggy address belongs to the physical page: [ 35.803077] page:000000002187391e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b20 [ 35.804194] memcg:ffff88801809ec01 [ 35.804611] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.805249] page_type: 0xffffffff() [ 35.805688] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.806586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801809ec01 [ 35.807466] page dumped because: kasan: bad access detected [ 35.808107] [ 35.808317] Memory state around the buggy address: [ 35.808895] ffff888015b20280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.809727] ffff888015b20300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.810562] >ffff888015b20380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.811392] ^ [ 35.812214] ffff888015b20400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.813060] ffff888015b20480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.813894] ================================================================== [ 35.814784] Disabling lock debugging due to kernel taint [ 37.436226] BUG: Bad rss-counter state mm:00000000d6029801 type:MM_FILEPAGES val:33 [ 37.436984] BUG: Bad rss-counter state mm:00000000d6029801 type:MM_ANONPAGES val:22 [ 37.912699] BUG: Bad rss-counter state mm:0000000018c4ecac type:MM_FILEPAGES val:33 [ 37.913389] BUG: Bad rss-counter state mm:0000000018c4ecac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35872' (ECDSA) to the list of known hosts. 2023/06/19 11:20:24 fuzzer started 2023/06/19 11:20:24 dialing manager at localhost:44161 2023/06/19 11:20:24 checking machine... 2023/06/19 11:20:24 checking revisions... [ 38.538579] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:20:24 testing simple program... [ 38.584498] cgroup: Unknown subsys name 'net' [ 38.629267] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:20:17 Registers: info registers vcpu 0 RAX=ffffffff863b2338 RBX=0000000000000001 RCX=ffffffff83640960 RDX=0000000000000000 RSI=ffffffff863b2338 RDI=ffffffff85fa3e1c RBP=ffffffff85fa3e20 RSP=ffff88806ce099f8 R8 =ffffffff863b2338 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008aa92 R12=ffffffff85fa3e1c R13=ffffffff85fa3e1c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 RFL=00000286 [--S--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 00007fc40f6fc900 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=00007ffcd347b000 CR3=000000000df50000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fefe8041640 CR3=000000000e27a000 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=2033323a30323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a30323a3131203931 XMM08=00007ff46001b8b00000004c00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000