syzkaller login: [ 31.130011] BUG: Bad rss-counter state mm:000000002779d698 type:MM_FILEPAGES val:33 [ 31.131934] BUG: Bad rss-counter state mm:000000002779d698 type:MM_ANONPAGES val:22 [ 31.279622] ================================================================== [ 31.280554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.281513] Read of size 8 at addr ffff8880181bab38 by task sshd/220 [ 31.282387] [ 31.282607] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.283512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.284499] Call Trace: [ 31.284823] [ 31.285116] dump_stack_lvl+0x91/0xf0 [ 31.285653] print_report+0xcc/0x620 [ 31.286161] ? __virt_addr_valid+0x102/0x340 [ 31.286730] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287351] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287982] kasan_report+0xbe/0xf0 [ 31.288473] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289120] vma_interval_tree_remove+0xc75/0xec0 [ 31.289738] vma_prepare+0xc54/0x11a0 [ 31.290229] __split_vma+0x5af/0x950 [ 31.290724] ? __pfx___split_vma+0x10/0x10 [ 31.291264] ? find_held_lock+0x2c/0x110 [ 31.291806] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.292382] ? lock_is_held_type+0x9f/0x120 [ 31.292946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.293584] ? mtree_range_walk+0x632/0x900 [ 31.294153] ? mas_walk+0x5c7/0x7c0 [ 31.294663] do_vmi_munmap+0x1f1/0x2b0 [ 31.295167] mmap_region+0x1f9/0x2660 [ 31.295660] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.296169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.296882] ? __pfx_lock_acquire+0x10/0x10 [ 31.297439] ? __pfx_mmap_region+0x10/0x10 [ 31.297981] ? security_mmap_addr+0x7d/0xa0 [ 31.298516] ? get_unmapped_area+0x1f5/0x3f0 [ 31.299070] do_mmap+0x854/0xf00 [ 31.299529] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.300034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.300600] ksys_mmap_pgoff+0x3af/0x500 [ 31.301105] do_syscall_64+0x3f/0x90 [ 31.301601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302249] RIP: 0033:0x7f36a264fd82 [ 31.302709] 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 [ 31.304830] RSP: 002b:00007fff927fb7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.305753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36a264fd82 [ 31.306600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36a1a89000 [ 31.307442] RBP: 00007f36a1a89000 R08: 0000000000000009 R09: 0000000000001000 [ 31.308341] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624f4cc5ec0 [ 31.309195] R13: 00007fff927fb7c0 R14: 00007fff927fb7f0 R15: 00007fff927fbb50 [ 31.310059] [ 31.310351] [ 31.310565] Allocated by task 213: [ 31.310992] kasan_save_stack+0x22/0x50 [ 31.311503] kasan_set_track+0x25/0x30 [ 31.311996] __kasan_slab_alloc+0x59/0x70 [ 31.312521] kmem_cache_alloc+0x16b/0x370 [ 31.313033] vm_area_dup+0x20/0x160 [ 31.313501] __split_vma+0x170/0x950 [ 31.313966] split_vma+0xc6/0x110 [ 31.314406] mprotect_fixup+0x8d2/0xb30 [ 31.314910] do_mprotect_pkey+0x87e/0xd40 [ 31.315423] __x64_sys_mprotect+0x78/0xc0 [ 31.315944] do_syscall_64+0x3f/0x90 [ 31.316420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317067] [ 31.317279] Freed by task 213: [ 31.317690] kasan_save_stack+0x22/0x50 [ 31.318186] kasan_set_track+0x25/0x30 [ 31.318672] kasan_save_free_info+0x2b/0x50 [ 31.319203] __kasan_slab_free+0x10a/0x190 [ 31.319729] kmem_cache_free+0x10d/0x4d0 [ 31.320248] rcu_core+0x8c8/0x2860 [ 31.320691] __do_softirq+0x1b7/0x7d4 [ 31.321163] [ 31.321386] Last potentially related work creation: [ 31.321960] kasan_save_stack+0x22/0x50 [ 31.322454] __kasan_record_aux_stack+0x8e/0xa0 [ 31.323020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.323661] remove_vma+0x139/0x170 [ 31.324108] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.324656] do_vmi_munmap+0x1f1/0x2b0 [ 31.325136] __vm_munmap+0x138/0x3a0 [ 31.325620] __x64_sys_munmap+0x59/0x80 [ 31.326119] do_syscall_64+0x3f/0x90 [ 31.326589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327226] [ 31.327438] The buggy address belongs to the object at ffff8880181baae0 [ 31.327438] which belongs to the cache vm_area_struct of size 168 [ 31.328907] The buggy address is located 88 bytes inside of [ 31.328907] freed 168-byte region [ffff8880181baae0, ffff8880181bab88) [ 31.330314] [ 31.330527] The buggy address belongs to the physical page: [ 31.331177] page:00000000bdbca616 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181ba [ 31.332258] memcg:ffff8880093fcb01 [ 31.332681] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.333320] page_type: 0xffffffff() [ 31.333782] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.334730] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093fcb01 [ 31.335638] page dumped because: kasan: bad access detected [ 31.336294] [ 31.336520] Memory state around the buggy address: [ 31.337172] ffff8880181baa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.338147] ffff8880181baa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.339119] >ffff8880181bab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.340081] ^ [ 31.340773] ffff8880181bab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.341765] ffff8880181bac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.342736] ================================================================== [ 31.343870] Disabling lock debugging due to kernel taint [ 33.257780] BUG: Bad rss-counter state mm:000000008b0f887d type:MM_FILEPAGES val:33 [ 33.258994] BUG: Bad rss-counter state mm:000000008b0f887d type:MM_ANONPAGES val:22 [ 33.720374] BUG: Bad rss-counter state mm:00000000444d51a5 type:MM_FILEPAGES val:33 [ 33.721912] BUG: Bad rss-counter state mm:00000000444d51a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4373' (ECDSA) to the list of known hosts. 2023/06/20 21:13:54 fuzzer started 2023/06/20 21:13:54 dialing manager at localhost:36067 2023/06/20 21:13:54 checking machine... 2023/06/20 21:13:54 checking revisions... [ 34.403694] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:13:55 testing simple program... [ 34.461892] cgroup: Unknown subsys name 'net' [ 34.500093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:13:54 Registers: info registers vcpu 0 RAX=00000000fffffffe RBX=00007fff4c8ab1a0 RCX=00005566f3c68010 RDX=000000000000001d RSI=0000000000000002 RDI=0000000000000000 RBP=00007fff4c8aa610 RSP=00007fff4c8aa570 R8 =00005566f2137345 R9 =ffffffffffffff01 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007fff4c8aa570 R14=0000000000000000 R15=00007fff4c8ab2a8 RIP=00005566f21373d3 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f011bcbe900 00000000 00000000 GS =0000 0000000000000000 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=00007f011b1dc000 CR3=000000000c58a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=12a9b98fa61b9a1200000000000ae988 XMM05=d3fe982368b899210000000000132d10 XMM06=3fb05290197133a50000000000131ab0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e1385 RSI=ffffffff812bc70c RDI=ffff88806cf09b6c RBP=ffff88806cf09c28 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020ee5 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015a71b40 R15=ffff88800f17cc60 RIP=ffffffff813ad549 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd14b183900 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=00007fd14b148008 CR3=0000000016b0a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000