syzkaller login: [ 56.236001] BUG: Bad rss-counter state mm:0000000023a4a5f1 type:MM_FILEPAGES val:33 [ 56.237931] BUG: Bad rss-counter state mm:0000000023a4a5f1 type:MM_ANONPAGES val:22 [ 56.392607] ================================================================== [ 56.393516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.394460] Read of size 8 at addr ffff888016b1bc20 by task sshd/221 [ 56.395244] [ 56.395468] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.396386] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.397363] Call Trace: [ 56.397718] [ 56.398031] dump_stack_lvl+0x91/0xf0 [ 56.398527] print_report+0xcc/0x620 [ 56.399008] ? __virt_addr_valid+0x102/0x340 [ 56.399573] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.400184] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.400807] kasan_report+0xbe/0xf0 [ 56.401281] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.401910] vma_interval_tree_remove+0xc75/0xec0 [ 56.402544] vma_prepare+0xc54/0x11a0 [ 56.403030] __split_vma+0x5af/0x950 [ 56.403512] ? __pfx___split_vma+0x10/0x10 [ 56.404033] ? find_held_lock+0x2c/0x110 [ 56.404548] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.405113] ? lock_is_held_type+0x9f/0x120 [ 56.405644] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.406257] ? mtree_range_walk+0x632/0x900 [ 56.406805] ? mas_walk+0x5c7/0x7c0 [ 56.407274] do_vmi_munmap+0x1f1/0x2b0 [ 56.407768] mmap_region+0x1f9/0x2660 [ 56.408248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.408755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.409471] ? __pfx_lock_acquire+0x10/0x10 [ 56.410039] ? __pfx_mmap_region+0x10/0x10 [ 56.410566] ? security_mmap_addr+0x7d/0xa0 [ 56.411110] ? get_unmapped_area+0x1f5/0x3f0 [ 56.411667] do_mmap+0x854/0xf00 [ 56.412113] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.412617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.413182] ksys_mmap_pgoff+0x3af/0x500 [ 56.413691] do_syscall_64+0x3f/0x90 [ 56.414182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.414829] RIP: 0033:0x7f84a317dd82 [ 56.415286] 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 [ 56.417510] RSP: 002b:00007ffe844f5b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.418465] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84a317dd82 [ 56.419347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84a25b7000 [ 56.420229] RBP: 00007f84a25b7000 R08: 0000000000000009 R09: 0000000000001000 [ 56.421104] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555923b2aec0 [ 56.421997] R13: 00007ffe844f5b20 R14: 00007ffe844f5b50 R15: 00007ffe844f5eb0 [ 56.422890] [ 56.423196] [ 56.423416] Allocated by task 214: [ 56.423862] kasan_save_stack+0x22/0x50 [ 56.424388] kasan_set_track+0x25/0x30 [ 56.424897] __kasan_slab_alloc+0x59/0x70 [ 56.425445] kmem_cache_alloc+0x16b/0x370 [ 56.425978] vm_area_dup+0x20/0x160 [ 56.426449] __split_vma+0x170/0x950 [ 56.426930] split_vma+0xc6/0x110 [ 56.427382] mprotect_fixup+0x8d2/0xb30 [ 56.427902] do_mprotect_pkey+0x87e/0xd40 [ 56.428443] __x64_sys_mprotect+0x78/0xc0 [ 56.428986] do_syscall_64+0x3f/0x90 [ 56.429473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.430160] [ 56.430385] Freed by task 214: [ 56.430790] kasan_save_stack+0x22/0x50 [ 56.431312] kasan_set_track+0x25/0x30 [ 56.431822] kasan_save_free_info+0x2b/0x50 [ 56.432376] __kasan_slab_free+0x10a/0x190 [ 56.432925] kmem_cache_free+0x10d/0x4d0 [ 56.433457] rcu_core+0x8c8/0x2860 [ 56.433917] __do_softirq+0x1b7/0x7d4 [ 56.434426] [ 56.434650] Last potentially related work creation: [ 56.435256] kasan_save_stack+0x22/0x50 [ 56.435774] __kasan_record_aux_stack+0x8e/0xa0 [ 56.436366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.437032] remove_vma+0x139/0x170 [ 56.437498] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.438095] do_vmi_munmap+0x1f1/0x2b0 [ 56.438598] __vm_munmap+0x138/0x3a0 [ 56.439084] __x64_sys_munmap+0x59/0x80 [ 56.439595] do_syscall_64+0x3f/0x90 [ 56.440084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.440746] [ 56.440966] The buggy address belongs to the object at ffff888016b1bbc8 [ 56.440966] which belongs to the cache vm_area_struct of size 168 [ 56.442504] The buggy address is located 88 bytes inside of [ 56.442504] freed 168-byte region [ffff888016b1bbc8, ffff888016b1bc70) [ 56.443969] [ 56.444188] The buggy address belongs to the physical page: [ 56.444873] page:000000003a838177 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b1b [ 56.446006] memcg:ffff88801478b201 [ 56.446451] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.447118] page_type: 0xffffffff() [ 56.447584] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.448538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801478b201 [ 56.449478] page dumped because: kasan: bad access detected [ 56.450180] [ 56.450404] Memory state around the buggy address: [ 56.451004] ffff888016b1bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.451891] ffff888016b1bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 56.452774] >ffff888016b1bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 56.453653] ^ [ 56.454213] ffff888016b1bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 56.455102] ffff888016b1bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 56.455991] ================================================================== [ 56.457084] Disabling lock debugging due to kernel taint [ 58.333473] BUG: Bad rss-counter state mm:0000000046d428bb type:MM_FILEPAGES val:33 [ 58.334287] BUG: Bad rss-counter state mm:0000000046d428bb type:MM_ANONPAGES val:22 [ 58.753217] BUG: Bad rss-counter state mm:0000000046c15743 type:MM_FILEPAGES val:33 [ 58.755312] BUG: Bad rss-counter state mm:0000000046c15743 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61002' (ECDSA) to the list of known hosts. 2023/06/19 14:03:13 fuzzer started 2023/06/19 14:03:13 dialing manager at localhost:44161 2023/06/19 14:03:13 checking machine... 2023/06/19 14:03:13 checking revisions... [ 59.505815] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:03:13 testing simple program... [ 59.547640] cgroup: Unknown subsys name 'net' [ 59.596060] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:02:47 Registers: info registers vcpu 0 RAX=1ffff110027953b5 RBX=ffff888013ca9d78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013ca9da8 RBP=ffff888013b0c780 RSP=ffff8880139c79e8 R8 =0000000000000001 R9 =ffffed1002738f31 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801ca00c00 R14=ffffffff83677d48 R15=0000000000000001 RIP=ffffffff81846362 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 00007f849b18f900 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=00007fffcb430000 CR3=000000000fcf8000 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=00007f98ac9316a0 CR3=000000000c7d8000 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=1649e09e5a1303854d4174f04900cb40 XMM02=000000000011c7e8eff9b2d0a8fce9cb XMM03=000000000011c8b82c67c8bc2e329bc3 XMM04=d70a7f14ea98895e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133880 XMM06=3f5ee7c841a5884400000000001326e8 XMM07=e042d86d42eb936e0000000000124018 XMM08=2b43106310c857f6000000000011c8b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000