syzkaller login: [ 44.058640] BUG: Bad rss-counter state mm:0000000058ae3ae2 type:MM_FILEPAGES val:33 [ 44.060082] BUG: Bad rss-counter state mm:0000000058ae3ae2 type:MM_ANONPAGES val:22 [ 44.210032] ================================================================== [ 44.210932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.211876] Read of size 8 at addr ffff888009537798 by task sshd/222 [ 44.212640] [ 44.212854] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.213892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.214865] Call Trace: [ 44.215184] [ 44.215467] dump_stack_lvl+0x91/0xf0 [ 44.215951] print_report+0xcc/0x620 [ 44.216434] ? __virt_addr_valid+0x102/0x340 [ 44.216983] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.217622] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.218228] kasan_report+0xbe/0xf0 [ 44.218706] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.219333] vma_interval_tree_remove+0xc75/0xec0 [ 44.219926] vma_prepare+0xc54/0x11a0 [ 44.220414] __split_vma+0x5af/0x950 [ 44.220889] ? __pfx___split_vma+0x10/0x10 [ 44.221414] ? find_held_lock+0x2c/0x110 [ 44.221955] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.222528] ? lock_is_held_type+0x9f/0x120 [ 44.223056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.223666] ? mtree_range_walk+0x632/0x900 [ 44.224217] ? mas_walk+0x5c7/0x7c0 [ 44.224696] do_vmi_munmap+0x1f1/0x2b0 [ 44.225184] mmap_region+0x1f9/0x2660 [ 44.225669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.226177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.226897] ? __pfx_lock_acquire+0x10/0x10 [ 44.227432] ? __pfx_mmap_region+0x10/0x10 [ 44.227969] ? security_mmap_addr+0x7d/0xa0 [ 44.228504] ? get_unmapped_area+0x1f5/0x3f0 [ 44.229055] do_mmap+0x854/0xf00 [ 44.229515] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.230002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.230576] ksys_mmap_pgoff+0x3af/0x500 [ 44.231083] do_syscall_64+0x3f/0x90 [ 44.231567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.232208] RIP: 0033:0x7fc3dadb7d82 [ 44.232669] 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 [ 44.234830] RSP: 002b:00007ffe83b339c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.235734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3dadb7d82 [ 44.236594] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3da1f1000 [ 44.237478] RBP: 00007fc3da1f1000 R08: 0000000000000009 R09: 0000000000001000 [ 44.238342] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2d13f7ec0 [ 44.239194] R13: 00007ffe83b339e0 R14: 00007ffe83b33a10 R15: 00007ffe83b33d70 [ 44.240055] [ 44.240343] [ 44.240558] Allocated by task 215: [ 44.240989] kasan_save_stack+0x22/0x50 [ 44.241507] kasan_set_track+0x25/0x30 [ 44.242009] __kasan_slab_alloc+0x59/0x70 [ 44.242542] kmem_cache_alloc+0x16b/0x370 [ 44.243062] vm_area_dup+0x20/0x160 [ 44.243515] __split_vma+0x170/0x950 [ 44.243990] split_vma+0xc6/0x110 [ 44.244434] mprotect_fixup+0x8d2/0xb30 [ 44.244946] do_mprotect_pkey+0x87e/0xd40 [ 44.245489] __x64_sys_mprotect+0x78/0xc0 [ 44.246008] do_syscall_64+0x3f/0x90 [ 44.246483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.247137] [ 44.247356] Freed by task 215: [ 44.247745] kasan_save_stack+0x22/0x50 [ 44.248249] kasan_set_track+0x25/0x30 [ 44.248752] kasan_save_free_info+0x2b/0x50 [ 44.249298] __kasan_slab_free+0x10a/0x190 [ 44.249846] kmem_cache_free+0x10d/0x4d0 [ 44.250356] rcu_core+0x8c8/0x2860 [ 44.250803] __do_softirq+0x1b7/0x7d4 [ 44.251278] [ 44.251494] Last potentially related work creation: [ 44.252078] kasan_save_stack+0x22/0x50 [ 44.252584] __kasan_record_aux_stack+0x8e/0xa0 [ 44.253152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.253801] remove_vma+0x139/0x170 [ 44.254253] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.254911] do_vmi_munmap+0x1f1/0x2b0 [ 44.255394] __vm_munmap+0x138/0x3a0 [ 44.255868] __x64_sys_munmap+0x59/0x80 [ 44.256366] do_syscall_64+0x3f/0x90 [ 44.256835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.257505] [ 44.257727] The buggy address belongs to the object at ffff888009537740 [ 44.257727] which belongs to the cache vm_area_struct of size 168 [ 44.259195] The buggy address is located 88 bytes inside of [ 44.259195] freed 168-byte region [ffff888009537740, ffff8880095377e8) [ 44.260614] [ 44.260832] The buggy address belongs to the physical page: [ 44.261495] page:000000002a03192d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9537 [ 44.262591] memcg:ffff888018e42201 [ 44.263025] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.263676] page_type: 0xffffffff() [ 44.264135] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.265050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e42201 [ 44.265977] page dumped because: kasan: bad access detected [ 44.266630] [ 44.266845] Memory state around the buggy address: [ 44.267420] ffff888009537680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.268272] ffff888009537700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.269120] >ffff888009537780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.269972] ^ [ 44.270464] ffff888009537800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 44.271317] ffff888009537880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 44.272165] ================================================================== [ 44.273082] Disabling lock debugging due to kernel taint [ 46.757447] BUG: Bad rss-counter state mm:000000005b6582c8 type:MM_FILEPAGES val:33 [ 46.758373] BUG: Bad rss-counter state mm:000000005b6582c8 type:MM_ANONPAGES val:22 [ 47.313333] BUG: Bad rss-counter state mm:000000006ccc7413 type:MM_FILEPAGES val:33 [ 47.314656] BUG: Bad rss-counter state mm:000000006ccc7413 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52293' (ECDSA) to the list of known hosts. 2023/06/19 23:48:25 fuzzer started 2023/06/19 23:48:25 dialing manager at localhost:44161 2023/06/19 23:48:25 checking machine... 2023/06/19 23:48:25 checking revisions... [ 47.961897] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:48:25 testing simple program... [ 47.994069] cgroup: Unknown subsys name 'net' [ 48.036702] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:48:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff9a492918 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=00007fb1654f9510000056331ff1e790 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=1ffff11001434306 RBX=0000000000000080 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff837263b3 RDI=0000000000000005 RBP=0000000000000081 RSP=ffff888017e777c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96ee0 R14=ffff88800a1a1830 R15=0000000000000006 RIP=ffffffff837263cd 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 00007f6bbb5fe900 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=00007f6bbbbb5618 CR3=000000000e708000 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