syzkaller login: [ 30.673407] BUG: Bad rss-counter state mm:0000000016d7a36e type:MM_FILEPAGES val:33 [ 30.674406] BUG: Bad rss-counter state mm:0000000016d7a36e type:MM_ANONPAGES val:22 [ 30.853938] ================================================================== [ 30.854979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856040] Read of size 8 at addr ffff88800cf41310 by task sshd/220 [ 30.857020] [ 30.857263] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859333] Call Trace: [ 30.859691] [ 30.860007] dump_stack_lvl+0x91/0xf0 [ 30.860564] print_report+0xcc/0x620 [ 30.861114] ? __virt_addr_valid+0x102/0x340 [ 30.861735] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862426] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863123] kasan_report+0xbe/0xf0 [ 30.863708] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864437] vma_interval_tree_remove+0xc75/0xec0 [ 30.865145] vma_prepare+0xc54/0x11a0 [ 30.865705] __split_vma+0x5af/0x950 [ 30.866263] ? __pfx___split_vma+0x10/0x10 [ 30.866884] ? find_held_lock+0x2c/0x110 [ 30.867515] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.868197] ? lock_is_held_type+0x9f/0x120 [ 30.868840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.869568] ? mtree_range_walk+0x632/0x900 [ 30.870226] ? mas_walk+0x5c7/0x7c0 [ 30.870787] do_vmi_munmap+0x1f1/0x2b0 [ 30.871391] mmap_region+0x1f9/0x2660 [ 30.871965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.872585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.873449] ? __pfx_lock_acquire+0x10/0x10 [ 30.874082] ? __pfx_mmap_region+0x10/0x10 [ 30.874722] ? security_mmap_addr+0x7d/0xa0 [ 30.875377] ? get_unmapped_area+0x1f5/0x3f0 [ 30.876033] do_mmap+0x854/0xf00 [ 30.876574] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.877176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.877862] ksys_mmap_pgoff+0x3af/0x500 [ 30.878486] do_syscall_64+0x3f/0x90 [ 30.879076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879896] RIP: 0033:0x7f43cfc1ed82 [ 30.880386] 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 [ 30.882507] RSP: 002b:00007ffdd809ae78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.883418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f43cfc1ed82 [ 30.884264] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f43cf058000 [ 30.885102] RBP: 00007f43cf058000 R08: 0000000000000009 R09: 0000000000001000 [ 30.885944] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a4d5fbec0 [ 30.886786] R13: 00007ffdd809ae90 R14: 00007ffdd809aec0 R15: 00007ffdd809b220 [ 30.887654] [ 30.887949] [ 30.888168] Allocated by task 213: [ 30.888595] kasan_save_stack+0x22/0x50 [ 30.889099] kasan_set_track+0x25/0x30 [ 30.889595] __kasan_slab_alloc+0x59/0x70 [ 30.890125] kmem_cache_alloc+0x16b/0x370 [ 30.890639] vm_area_dup+0x20/0x160 [ 30.891094] __split_vma+0x170/0x950 [ 30.891578] split_vma+0xc6/0x110 [ 30.892017] mprotect_fixup+0x8d2/0xb30 [ 30.892524] do_mprotect_pkey+0x87e/0xd40 [ 30.893039] __x64_sys_mprotect+0x78/0xc0 [ 30.893562] do_syscall_64+0x3f/0x90 [ 30.894041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894682] [ 30.894897] Freed by task 13: [ 30.895274] kasan_save_stack+0x22/0x50 [ 30.895788] kasan_set_track+0x25/0x30 [ 30.896285] kasan_save_free_info+0x2b/0x50 [ 30.896821] __kasan_slab_free+0x10a/0x190 [ 30.897362] kmem_cache_free+0x10d/0x4d0 [ 30.897880] rcu_core+0x8c8/0x2860 [ 30.898324] __do_softirq+0x1b7/0x7d4 [ 30.898817] [ 30.899034] Last potentially related work creation: [ 30.899623] kasan_save_stack+0x22/0x50 [ 30.900124] __kasan_record_aux_stack+0x8e/0xa0 [ 30.900696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901355] remove_vma+0x139/0x170 [ 30.901810] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902380] do_vmi_munmap+0x1f1/0x2b0 [ 30.902866] __vm_munmap+0x138/0x3a0 [ 30.903353] __x64_sys_munmap+0x59/0x80 [ 30.903846] do_syscall_64+0x3f/0x90 [ 30.904317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904959] [ 30.905173] The buggy address belongs to the object at ffff88800cf412b8 [ 30.905173] which belongs to the cache vm_area_struct of size 168 [ 30.906639] The buggy address is located 88 bytes inside of [ 30.906639] freed 168-byte region [ffff88800cf412b8, ffff88800cf41360) [ 30.908050] [ 30.908270] The buggy address belongs to the physical page: [ 30.908925] page:000000006f018d62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf41 [ 30.910012] memcg:ffff88800e267601 [ 30.910435] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911084] page_type: 0xffffffff() [ 30.911557] raw: 0100000000000200 ffff8880087a0c80 ffffea000033d100 dead000000000002 [ 30.912472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e267601 [ 30.913378] page dumped because: kasan: bad access detected [ 30.914041] [ 30.914253] Memory state around the buggy address: [ 30.914832] ffff88800cf41200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.915702] ffff88800cf41280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.916552] >ffff88800cf41300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.917409] ^ [ 30.917878] ffff88800cf41380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.918738] ffff88800cf41400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.919606] ================================================================== [ 30.920597] Disabling lock debugging due to kernel taint [ 32.835735] BUG: Bad rss-counter state mm:00000000ab778547 type:MM_FILEPAGES val:33 [ 32.837011] BUG: Bad rss-counter state mm:00000000ab778547 type:MM_ANONPAGES val:22 [ 33.325022] BUG: Bad rss-counter state mm:0000000090632994 type:MM_FILEPAGES val:33 [ 33.326171] BUG: Bad rss-counter state mm:0000000090632994 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4103' (ECDSA) to the list of known hosts. 2023/06/20 15:47:13 fuzzer started 2023/06/20 15:47:13 dialing manager at localhost:36067 2023/06/20 15:47:13 checking machine... 2023/06/20 15:47:13 checking revisions... [ 34.017833] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:47:13 testing simple program... [ 34.082591] cgroup: Unknown subsys name 'net' [ 34.137029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:47:13 Registers: info registers vcpu 0 RAX=1ffffffff0c0aef5 RBX=ffffffff860577a8 RCX=ffffffff866212de RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff860577a8 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff860577ac R13=ffffffff85d7a9c4 R14=ffffffff860577a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 0000000000000000 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=00007ffdcbcebd08 CR3=0000000005482000 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=00007fbd1be805100000560984b02790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000331c60ed RCX=ffff88806ca30768 RDX=000000000000000d RSI=0000000000000002 RDI=000000004799b3ad RBP=ffff88800f6bca30 RSP=ffff8880175a75f0 R8 =00000000c46c2e7d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff8880175a7658 R15=000000000000000d RIP=ffffffff822704ed 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 00007fd10d573900 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=00007fd10db2a618 CR3=000000000f5b4000 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