syzkaller login: [ 38.642291] BUG: Bad rss-counter state mm:0000000028e6191a type:MM_FILEPAGES val:33 [ 38.642847] BUG: Bad rss-counter state mm:0000000028e6191a type:MM_ANONPAGES val:22 [ 38.752504] ================================================================== [ 38.753256] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.754002] Read of size 8 at addr ffff88801a14bd08 by task sshd/226 [ 38.754638] [ 38.754808] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.755519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.756399] Call Trace: [ 38.756666] [ 38.756885] dump_stack_lvl+0x91/0xf0 [ 38.757264] print_report+0xcc/0x620 [ 38.757639] ? __virt_addr_valid+0x102/0x340 [ 38.758068] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.758569] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.759049] kasan_report+0xbe/0xf0 [ 38.759310] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.759648] vma_interval_tree_remove+0xc75/0xec0 [ 38.759979] vma_prepare+0xc54/0x11a0 [ 38.760242] __split_vma+0x5af/0x950 [ 38.760505] ? __pfx___split_vma+0x10/0x10 [ 38.760822] ? find_held_lock+0x2c/0x110 [ 38.761141] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.761496] ? lock_is_held_type+0x9f/0x120 [ 38.761819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.762195] ? mtree_range_walk+0x632/0x900 [ 38.762540] ? mas_walk+0x5c7/0x7c0 [ 38.762823] do_vmi_munmap+0x1f1/0x2b0 [ 38.763093] mmap_region+0x1f9/0x2660 [ 38.763355] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.763658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.764095] ? __pfx_lock_acquire+0x10/0x10 [ 38.764406] ? __pfx_mmap_region+0x10/0x10 [ 38.764720] ? security_mmap_addr+0x7d/0xa0 [ 38.765047] ? get_unmapped_area+0x1f5/0x3f0 [ 38.765386] do_mmap+0x854/0xf00 [ 38.765629] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.765904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.766219] ksys_mmap_pgoff+0x3af/0x500 [ 38.766522] do_syscall_64+0x3f/0x90 [ 38.766791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.767151] RIP: 0033:0x7f5a6897bd82 [ 38.767405] 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 [ 38.768573] RSP: 002b:00007ffdef37b388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.769079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a6897bd82 [ 38.769547] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a67db5000 [ 38.770019] RBP: 00007f5a67db5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.770507] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d222a38ec0 [ 38.771028] R13: 00007ffdef37b3a0 R14: 00007ffdef37b3d0 R15: 00007ffdef37b730 [ 38.771510] [ 38.771669] [ 38.771793] Allocated by task 219: [ 38.772057] kasan_save_stack+0x22/0x50 [ 38.772361] kasan_set_track+0x25/0x30 [ 38.772660] __kasan_slab_alloc+0x59/0x70 [ 38.772963] kmem_cache_alloc+0x16b/0x370 [ 38.773257] vm_area_dup+0x20/0x160 [ 38.773507] __split_vma+0x170/0x950 [ 38.773765] split_vma+0xc6/0x110 [ 38.774006] mprotect_fixup+0x8d2/0xb30 [ 38.774298] do_mprotect_pkey+0x87e/0xd40 [ 38.774587] __x64_sys_mprotect+0x78/0xc0 [ 38.774875] do_syscall_64+0x3f/0x90 [ 38.775137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.775491] [ 38.775609] Freed by task 219: [ 38.775825] kasan_save_stack+0x22/0x50 [ 38.776102] kasan_set_track+0x25/0x30 [ 38.776373] kasan_save_free_info+0x2b/0x50 [ 38.776662] __kasan_slab_free+0x10a/0x190 [ 38.776955] kmem_cache_free+0x10d/0x4d0 [ 38.777234] rcu_core+0x8c8/0x2860 [ 38.777477] __do_softirq+0x1b7/0x7d4 [ 38.777740] [ 38.777863] Last potentially related work creation: [ 38.778186] kasan_save_stack+0x22/0x50 [ 38.778475] __kasan_record_aux_stack+0x8e/0xa0 [ 38.778790] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.779159] remove_vma+0x139/0x170 [ 38.779428] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.779754] do_vmi_munmap+0x1f1/0x2b0 [ 38.780032] __vm_munmap+0x138/0x3a0 [ 38.780314] __x64_sys_munmap+0x59/0x80 [ 38.780610] do_syscall_64+0x3f/0x90 [ 38.780868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.781219] [ 38.781343] The buggy address belongs to the object at ffff88801a14bcb0 [ 38.781343] which belongs to the cache vm_area_struct of size 168 [ 38.782215] The buggy address is located 88 bytes inside of [ 38.782215] freed 168-byte region [ffff88801a14bcb0, ffff88801a14bd58) [ 38.783049] [ 38.783174] The buggy address belongs to the physical page: [ 38.783567] page:000000006e5944bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a14b [ 38.784213] memcg:ffff888019de3001 [ 38.784465] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.784847] page_type: 0xffffffff() [ 38.785108] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.785659] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019de3001 [ 38.786190] page dumped because: kasan: bad access detected [ 38.786593] [ 38.786725] Memory state around the buggy address: [ 38.787062] ffff88801a14bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.787570] ffff88801a14bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.788082] >ffff88801a14bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.788588] ^ [ 38.788851] ffff88801a14bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.789357] ffff88801a14be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.789869] ================================================================== [ 38.790440] Disabling lock debugging due to kernel taint [ 40.700831] BUG: Bad rss-counter state mm:0000000014960c11 type:MM_FILEPAGES val:33 [ 40.701959] BUG: Bad rss-counter state mm:0000000014960c11 type:MM_ANONPAGES val:22 [ 41.194983] BUG: Bad rss-counter state mm:00000000ba7ef6a1 type:MM_FILEPAGES val:33 [ 41.196026] BUG: Bad rss-counter state mm:00000000ba7ef6a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26666' (ECDSA) to the list of known hosts. 2023/06/20 12:25:29 fuzzer started 2023/06/20 12:25:29 dialing manager at localhost:36067 2023/06/20 12:25:29 checking machine... 2023/06/20 12:25:29 checking revisions... [ 41.984492] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:25:29 testing simple program... [ 42.050762] cgroup: Unknown subsys name 'net' [ 42.108487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:25:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015c975a0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83c1bf92 RDI=ffff888015c975ac RBP=0000000000000007 RSP=ffff888015c974b8 R8 =0000000000000001 R9 =ffff888015c97518 R10=0000000000038001 R11=00000000000238b2 R12=ffff888015c975a0 R13=0000000000000000 R14=ffff88800fd2d1c0 R15=ffff888015c97d36 RIP=ffffffff813ad506 RFL=00000246 [---Z-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 00007efc0e340900 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=00007efc0d789540 CR3=000000000d706000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c6d491525a522c6e00000000000ae988 XMM05=60363b76579b9b610000000000132220 XMM06=13e856d8d71426c80000000000130ca0 XMM07=fb795ef6d657705600000000001212c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000005d40135 RBX=ffff88801ccd31b0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff846000aa RDI=ffffffff813710d2 RBP=0000000000000200 RSP=ffff88800d687a28 R8 =00000000ec7b8bb5 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea0000670800 R14=ffffffff83675648 R15=0000000000000024 RIP=ffffffff815343b0 RFL=00000046 [---Z-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 00007f5f133d7900 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=00007fff27dde000 CR3=000000000d70e000 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=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