syzkaller login: [ 59.930287] BUG: Bad rss-counter state mm:00000000570881c4 type:MM_FILEPAGES val:33 [ 59.931608] BUG: Bad rss-counter state mm:00000000570881c4 type:MM_ANONPAGES val:22 [ 60.076019] ================================================================== [ 60.077046] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.078361] Read of size 8 at addr ffff888017c0e4e0 by task sshd/219 [ 60.079241] [ 60.079516] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.080577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.081726] Call Trace: [ 60.082069] [ 60.082383] dump_stack_lvl+0x91/0xf0 [ 60.082954] print_report+0xcc/0x620 [ 60.083501] ? __virt_addr_valid+0x102/0x340 [ 60.084123] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.084819] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.085557] kasan_report+0xbe/0xf0 [ 60.086097] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.086907] vma_interval_tree_remove+0xc75/0xec0 [ 60.087590] vma_prepare+0xc54/0x11a0 [ 60.088130] __split_vma+0x5af/0x950 [ 60.088680] ? __pfx___split_vma+0x10/0x10 [ 60.089323] ? find_held_lock+0x2c/0x110 [ 60.090010] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.090654] ? lock_is_held_type+0x9f/0x120 [ 60.091253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.091963] ? mtree_range_walk+0x632/0x900 [ 60.092648] ? mas_walk+0x5c7/0x7c0 [ 60.093239] do_vmi_munmap+0x1f1/0x2b0 [ 60.093804] mmap_region+0x1f9/0x2660 [ 60.094328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.094925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.095836] ? __pfx_lock_acquire+0x10/0x10 [ 60.096449] ? __pfx_mmap_region+0x10/0x10 [ 60.097049] ? security_mmap_addr+0x7d/0xa0 [ 60.097705] ? get_unmapped_area+0x1f5/0x3f0 [ 60.098408] do_mmap+0x854/0xf00 [ 60.098949] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.099482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.100129] ksys_mmap_pgoff+0x3af/0x500 [ 60.100741] do_syscall_64+0x3f/0x90 [ 60.101377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.102155] RIP: 0033:0x7fcd9f510d82 [ 60.102689] 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 [ 60.105222] RSP: 002b:00007ffc668904d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.106261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd9f510d82 [ 60.107319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd9e94a000 [ 60.108282] RBP: 00007fcd9e94a000 R08: 0000000000000009 R09: 0000000000001000 [ 60.109275] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d398cdec0 [ 60.110317] R13: 00007ffc668904f0 R14: 00007ffc66890520 R15: 00007ffc66890880 [ 60.111323] [ 60.111675] [ 60.111920] Allocated by task 212: [ 60.112485] kasan_save_stack+0x22/0x50 [ 60.113076] kasan_set_track+0x25/0x30 [ 60.113650] __kasan_slab_alloc+0x59/0x70 [ 60.114221] kmem_cache_alloc+0x16b/0x370 [ 60.114858] vm_area_dup+0x20/0x160 [ 60.115451] __split_vma+0x170/0x950 [ 60.116012] split_vma+0xc6/0x110 [ 60.116506] mprotect_fixup+0x8d2/0xb30 [ 60.117087] do_mprotect_pkey+0x87e/0xd40 [ 60.117731] __x64_sys_mprotect+0x78/0xc0 [ 60.118404] do_syscall_64+0x3f/0x90 [ 60.118992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.119721] [ 60.119989] Freed by task 212: [ 60.120423] kasan_save_stack+0x22/0x50 [ 60.121161] kasan_set_track+0x25/0x30 [ 60.121732] kasan_save_free_info+0x2b/0x50 [ 60.122326] __kasan_slab_free+0x10a/0x190 [ 60.122952] kmem_cache_free+0x10d/0x4d0 [ 60.123609] rcu_core+0x8c8/0x2860 [ 60.124153] __do_softirq+0x1b7/0x7d4 [ 60.124720] [ 60.124965] Last potentially related work creation: [ 60.125665] kasan_save_stack+0x22/0x50 [ 60.126266] __kasan_record_aux_stack+0x8e/0xa0 [ 60.126989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.127728] remove_vma+0x139/0x170 [ 60.128233] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.128898] do_vmi_munmap+0x1f1/0x2b0 [ 60.129579] __vm_munmap+0x138/0x3a0 [ 60.130125] __x64_sys_munmap+0x59/0x80 [ 60.130714] do_syscall_64+0x3f/0x90 [ 60.131250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.132043] [ 60.132310] The buggy address belongs to the object at ffff888017c0e488 [ 60.132310] which belongs to the cache vm_area_struct of size 168 [ 60.134036] The buggy address is located 88 bytes inside of [ 60.134036] freed 168-byte region [ffff888017c0e488, ffff888017c0e530) [ 60.135721] [ 60.135969] The buggy address belongs to the physical page: [ 60.136719] page:0000000000a1c4bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c0e [ 60.138160] memcg:ffff8880167c4201 [ 60.138793] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.139828] page_type: 0xffffffff() [ 60.140493] raw: 0100000000000200 ffff88800879fc80 ffffea00005fd540 dead000000000007 [ 60.141886] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167c4201 [ 60.143065] page dumped because: kasan: bad access detected [ 60.143841] [ 60.144088] Memory state around the buggy address: [ 60.144810] ffff888017c0e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.145818] ffff888017c0e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.146802] >ffff888017c0e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.147789] ^ [ 60.148665] ffff888017c0e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 60.149678] ffff888017c0e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.150665] ================================================================== [ 60.151760] Disabling lock debugging due to kernel taint [ 62.088094] BUG: Bad rss-counter state mm:000000001c797190 type:MM_FILEPAGES val:33 [ 62.089634] BUG: Bad rss-counter state mm:000000001c797190 type:MM_ANONPAGES val:22 [ 62.580268] BUG: Bad rss-counter state mm:0000000067cf6c62 type:MM_FILEPAGES val:33 [ 62.581177] BUG: Bad rss-counter state mm:0000000067cf6c62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15545' (ECDSA) to the list of known hosts. 2023/06/20 06:37:35 fuzzer started 2023/06/20 06:37:36 dialing manager at localhost:44161 2023/06/20 06:37:36 checking machine... 2023/06/20 06:37:36 checking revisions... [ 63.364394] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:37:36 testing simple program... [ 63.411477] cgroup: Unknown subsys name 'net' [ 63.456440] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:37:14 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=000055e68d274000 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=00007f7fd5fa3510000055e68d270790 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=1ffff11001aff58f RBX=ffff88800d7fac48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d7fac78 RBP=ffff88800d74acf0 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800d71a780 R14=ffffffff8186b9c5 R15=ffff888019fcf780 RIP=ffffffff8184636c 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 00007f47aa8a7900 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=00007f47aae5e618 CR3=00000000146ae000 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