syzkaller login: [ 30.578169] BUG: Bad rss-counter state mm:00000000ee6c7781 type:MM_FILEPAGES val:33 [ 30.579329] BUG: Bad rss-counter state mm:00000000ee6c7781 type:MM_ANONPAGES val:22 [ 30.614301] ================================================================== [ 30.615319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.616530] Read of size 8 at addr ffff888016747c20 by task sshd/220 [ 30.617535] [ 30.617798] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.619012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.620233] Call Trace: [ 30.620615] [ 30.620952] dump_stack_lvl+0x91/0xf0 [ 30.621561] print_report+0xcc/0x620 [ 30.622139] ? __virt_addr_valid+0x102/0x340 [ 30.622791] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.623518] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.624253] kasan_report+0xbe/0xf0 [ 30.624821] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.625584] vma_interval_tree_remove+0xc75/0xec0 [ 30.626479] vma_prepare+0xc54/0x11a0 [ 30.626969] __split_vma+0x5af/0x950 [ 30.627439] ? __pfx___split_vma+0x10/0x10 [ 30.627973] ? find_held_lock+0x2c/0x110 [ 30.628508] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.629085] ? lock_is_held_type+0x9f/0x120 [ 30.629648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.630258] ? mtree_range_walk+0x632/0x900 [ 30.630832] ? mas_walk+0x5c7/0x7c0 [ 30.631321] do_vmi_munmap+0x1f1/0x2b0 [ 30.631828] mmap_region+0x1f9/0x2660 [ 30.632337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.632884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.633632] ? __pfx_lock_acquire+0x10/0x10 [ 30.634196] ? __pfx_mmap_region+0x10/0x10 [ 30.634764] ? security_mmap_addr+0x7d/0xa0 [ 30.635330] ? get_unmapped_area+0x1f5/0x3f0 [ 30.635916] do_mmap+0x854/0xf00 [ 30.636370] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.636890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.637498] ksys_mmap_pgoff+0x3af/0x500 [ 30.638049] do_syscall_64+0x3f/0x90 [ 30.638564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.639252] RIP: 0033:0x7f28d1423d82 [ 30.639743] 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 [ 30.642027] RSP: 002b:00007ffc3fd8da48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.642984] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28d1423d82 [ 30.643879] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28d085d000 [ 30.644779] RBP: 00007f28d085d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.645680] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ea9481d90 [ 30.646586] R13: 00007ffc3fd8da60 R14: 00007ffc3fd8da90 R15: 00007ffc3fd8ddf0 [ 30.647492] [ 30.647800] [ 30.648022] Allocated by task 213: [ 30.648478] kasan_save_stack+0x22/0x50 [ 30.649009] kasan_set_track+0x25/0x30 [ 30.649556] __kasan_slab_alloc+0x59/0x70 [ 30.650104] kmem_cache_alloc+0x16b/0x370 [ 30.650643] vm_area_dup+0x20/0x160 [ 30.651116] __split_vma+0x170/0x950 [ 30.651619] split_vma+0xc6/0x110 [ 30.652087] mprotect_fixup+0x8d2/0xb30 [ 30.652628] do_mprotect_pkey+0x87e/0xd40 [ 30.653182] __x64_sys_mprotect+0x78/0xc0 [ 30.653751] do_syscall_64+0x3f/0x90 [ 30.654258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.654948] [ 30.655175] Freed by task 202: [ 30.655591] kasan_save_stack+0x22/0x50 [ 30.656125] kasan_set_track+0x25/0x30 [ 30.656648] kasan_save_free_info+0x2b/0x50 [ 30.657202] __kasan_slab_free+0x10a/0x190 [ 30.657781] kmem_cache_free+0x10d/0x4d0 [ 30.658314] rcu_core+0x8c8/0x2860 [ 30.658780] __do_softirq+0x1b7/0x7d4 [ 30.659282] [ 30.659506] Last potentially related work creation: [ 30.660130] kasan_save_stack+0x22/0x50 [ 30.660658] __kasan_record_aux_stack+0x8e/0xa0 [ 30.661263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.661950] remove_vma+0x139/0x170 [ 30.662422] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.663014] do_vmi_munmap+0x1f1/0x2b0 [ 30.663525] __vm_munmap+0x138/0x3a0 [ 30.664012] __x64_sys_munmap+0x59/0x80 [ 30.664537] do_syscall_64+0x3f/0x90 [ 30.665031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.665711] [ 30.665933] Second to last potentially related work creation: [ 30.666657] kasan_save_stack+0x22/0x50 [ 30.667179] __kasan_record_aux_stack+0x8e/0xa0 [ 30.667784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.668474] remove_vma+0x139/0x170 [ 30.668955] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.669569] do_vmi_munmap+0x1f1/0x2b0 [ 30.670078] mmap_region+0x1f9/0x2660 [ 30.670577] do_mmap+0x854/0xf00 [ 30.671042] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.671559] ksys_mmap_pgoff+0x3af/0x500 [ 30.672088] do_syscall_64+0x3f/0x90 [ 30.672591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673268] [ 30.673504] The buggy address belongs to the object at ffff888016747bc8 [ 30.673504] which belongs to the cache vm_area_struct of size 168 [ 30.675063] The buggy address is located 88 bytes inside of [ 30.675063] freed 168-byte region [ffff888016747bc8, ffff888016747c70) [ 30.676558] [ 30.676785] The buggy address belongs to the physical page: [ 30.677512] page:00000000dc5122af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16747 [ 30.678674] memcg:ffff88800e1a3e01 [ 30.679126] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.679878] page_type: 0xffffffff() [ 30.680328] raw: 0100000000000200 ffff8880087a0c80 ffffea00006502c0 dead000000000005 [ 30.681246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1a3e01 [ 30.682162] page dumped because: kasan: bad access detected [ 30.682825] [ 30.683040] Memory state around the buggy address: [ 30.683621] ffff888016747b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.684481] ffff888016747b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.685333] >ffff888016747c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.686197] ^ [ 30.686727] ffff888016747c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.687585] ffff888016747d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.688441] ================================================================== [ 30.689581] Disabling lock debugging due to kernel taint [ 32.659270] BUG: Bad rss-counter state mm:0000000021504357 type:MM_FILEPAGES val:33 [ 32.660425] BUG: Bad rss-counter state mm:0000000021504357 type:MM_ANONPAGES val:22 [ 33.144174] BUG: Bad rss-counter state mm:0000000051fc3716 type:MM_FILEPAGES val:33 [ 33.145439] BUG: Bad rss-counter state mm:0000000051fc3716 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55738' (ECDSA) to the list of known hosts. 2023/06/20 14:49:44 fuzzer started 2023/06/20 14:49:44 dialing manager at localhost:36067 2023/06/20 14:49:44 checking machine... 2023/06/20 14:49:44 checking revisions... [ 33.850426] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:49:44 testing simple program... [ 33.902470] cgroup: Unknown subsys name 'net' [ 33.941848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:49:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110032a8f6b RSP=ffff888019547b38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=ffffffff8560b640 R13=ffffffff81821e99 R14=ffff88800efdd390 R15=ffff888017838010 RIP=ffffffff8135b960 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdb6af14700 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=00007f8d1763e0b0 CR3=000000000fe3c000 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=39343a3431203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383433 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff88800d33a260 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800d33a264 RBP=1ffff110011c6f87 RSP=ffff888008e37c30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000202 R13=ffff88800d33a2a0 R14=ffffffff813782f8 R15=ffff88800da9ed80 RIP=ffffffff812e009a 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 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=00007f8d1763d618 CR3=000000000e246000 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