syzkaller login: [ 30.491948] BUG: Bad rss-counter state mm:00000000cb51f497 type:MM_FILEPAGES val:33 [ 30.493196] BUG: Bad rss-counter state mm:00000000cb51f497 type:MM_ANONPAGES val:22 [ 30.600983] ================================================================== [ 30.601718] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.602453] Read of size 8 at addr ffff888015a34310 by task sshd/220 [ 30.603074] [ 30.603240] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.603923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.604706] Call Trace: [ 30.604981] [ 30.605258] dump_stack_lvl+0x91/0xf0 [ 30.605744] print_report+0xcc/0x620 [ 30.606224] ? __virt_addr_valid+0x102/0x340 [ 30.606769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607388] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607955] kasan_report+0xbe/0xf0 [ 30.608331] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608849] vma_interval_tree_remove+0xc75/0xec0 [ 30.609324] vma_prepare+0xc54/0x11a0 [ 30.609716] __split_vma+0x5af/0x950 [ 30.610085] ? __pfx___split_vma+0x10/0x10 [ 30.610506] ? find_held_lock+0x2c/0x110 [ 30.610929] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.611376] ? lock_is_held_type+0x9f/0x120 [ 30.611802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.612278] ? mtree_range_walk+0x632/0x900 [ 30.612737] ? mas_walk+0x5c7/0x7c0 [ 30.613106] do_vmi_munmap+0x1f1/0x2b0 [ 30.613496] mmap_region+0x1f9/0x2660 [ 30.613856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.614145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.614593] ? __pfx_lock_acquire+0x10/0x10 [ 30.614908] ? __pfx_mmap_region+0x10/0x10 [ 30.615206] ? security_mmap_addr+0x7d/0xa0 [ 30.615512] ? get_unmapped_area+0x1f5/0x3f0 [ 30.615829] do_mmap+0x854/0xf00 [ 30.616083] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.616369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.616703] ksys_mmap_pgoff+0x3af/0x500 [ 30.616988] do_syscall_64+0x3f/0x90 [ 30.617256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.617653] RIP: 0033:0x7fae6ef83d82 [ 30.617927] 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 [ 30.619168] RSP: 002b:00007ffd3f873788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.619705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae6ef83d82 [ 30.620223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae6e3bd000 [ 30.620720] RBP: 00007fae6e3bd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.621190] R10: 0000000000000812 R11: 0000000000000206 R12: 000055645b2bef70 [ 30.621701] R13: 00007ffd3f8737a0 R14: 00007ffd3f8737d0 R15: 00007ffd3f873b30 [ 30.622192] [ 30.622364] [ 30.622489] Allocated by task 213: [ 30.622753] kasan_save_stack+0x22/0x50 [ 30.623036] kasan_set_track+0x25/0x30 [ 30.623308] __kasan_slab_alloc+0x59/0x70 [ 30.623607] kmem_cache_alloc+0x16b/0x370 [ 30.623895] vm_area_dup+0x20/0x160 [ 30.624161] __split_vma+0x170/0x950 [ 30.624440] split_vma+0xc6/0x110 [ 30.624724] mprotect_fixup+0x8d2/0xb30 [ 30.625004] do_mprotect_pkey+0x87e/0xd40 [ 30.625300] __x64_sys_mprotect+0x78/0xc0 [ 30.625603] do_syscall_64+0x3f/0x90 [ 30.625872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.626247] [ 30.626367] Freed by task 213: [ 30.626597] kasan_save_stack+0x22/0x50 [ 30.626878] kasan_set_track+0x25/0x30 [ 30.627153] kasan_save_free_info+0x2b/0x50 [ 30.627455] __kasan_slab_free+0x10a/0x190 [ 30.627771] kmem_cache_free+0x10d/0x4d0 [ 30.628064] rcu_core+0x8c8/0x2860 [ 30.628335] __do_softirq+0x1b7/0x7d4 [ 30.628631] [ 30.628754] Last potentially related work creation: [ 30.629079] kasan_save_stack+0x22/0x50 [ 30.629358] __kasan_record_aux_stack+0x8e/0xa0 [ 30.629705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.630081] remove_vma+0x139/0x170 [ 30.630352] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.630668] do_vmi_munmap+0x1f1/0x2b0 [ 30.630938] __vm_munmap+0x138/0x3a0 [ 30.631202] __x64_sys_munmap+0x59/0x80 [ 30.631481] do_syscall_64+0x3f/0x90 [ 30.631762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.632118] [ 30.632236] The buggy address belongs to the object at ffff888015a342b8 [ 30.632236] which belongs to the cache vm_area_struct of size 168 [ 30.633085] The buggy address is located 88 bytes inside of [ 30.633085] freed 168-byte region [ffff888015a342b8, ffff888015a34360) [ 30.633924] [ 30.634045] The buggy address belongs to the physical page: [ 30.634412] page:0000000003e654c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a34 [ 30.635033] memcg:ffff888015815801 [ 30.635284] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.635662] page_type: 0xffffffff() [ 30.635919] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.636428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015815801 [ 30.636972] page dumped because: kasan: bad access detected [ 30.637357] [ 30.637481] Memory state around the buggy address: [ 30.637823] ffff888015a34200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.638350] ffff888015a34280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.638854] >ffff888015a34300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.639361] ^ [ 30.639633] ffff888015a34380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.640106] ffff888015a34400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.640651] ================================================================== [ 30.641189] Disabling lock debugging due to kernel taint [ 32.663136] BUG: Bad rss-counter state mm:000000004c4b0ad3 type:MM_FILEPAGES val:33 [ 32.664296] BUG: Bad rss-counter state mm:000000004c4b0ad3 type:MM_ANONPAGES val:22 [ 33.038857] BUG: Bad rss-counter state mm:000000000dc6cd94 type:MM_FILEPAGES val:33 [ 33.039848] BUG: Bad rss-counter state mm:000000000dc6cd94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26516' (ECDSA) to the list of known hosts. 2023/06/20 13:58:09 fuzzer started 2023/06/20 13:58:09 dialing manager at localhost:36067 2023/06/20 13:58:09 checking machine... 2023/06/20 13:58:09 checking revisions... [ 33.821916] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:58:09 testing simple program... [ 33.866973] cgroup: Unknown subsys name 'net' [ 33.902766] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:58:08 Registers: info registers vcpu 0 RAX=0000607f92e0bf98 RBX=00000000000002f8 RCX=0000000000000028 RDX=1ffff11002051019 RSI=1ffffffff0ba7c92 RDI=ffff8880102880c8 RBP=ffff888010288000 RSP=ffff88800da3f6d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888009c6e000 R13=00000000000002f8 R14=0000000000000000 R15=ffff88806ce361f0 RIP=ffffffff8182df7f RFL=00000006 [-----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 00007fc0f725f900 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=00007fc0f66e1600 CR3=0000000009cd4000 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=3260b64a36aa979e424f007440d3f709 XMM02=ec2efd57dc4c00df00000000001201c8 XMM03=6d8a781142bccd530000000000120298 XMM04=31ddfe3612ab8e7c00000000000ae988 XMM05=a9a946aa8c1f99220000000000133f60 XMM06=4fda316b135da52b0000000000133000 XMM07=fb795ef6d657705600000000001232e8 XMM08=2c67c8bc2e329bc30000000000120238 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=ffff888016a01b40 RCX=ffff88806cf0a000 RDX=ffff88806cf02000 RSI=0000000000000002 RDI=ffff88806cf09a48 RBP=ffff88806cf09ab8 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806cf09a98 R11=1ffff1100d9e7479 R12=ffff88806cf09a98 R13=ffff88806cf09ac0 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff8108dfb1 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 00007f33a3f3c900 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=00007f33a44f3618 CR3=000000001a2ec000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000