syzkaller login: [ 30.533992] BUG: Bad rss-counter state mm:00000000f311cb0f type:MM_FILEPAGES val:33 [ 30.534714] BUG: Bad rss-counter state mm:00000000f311cb0f type:MM_ANONPAGES val:22 [ 30.662659] ================================================================== [ 30.663315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.663954] Read of size 8 at addr ffff888016bbfd08 by task sshd/220 [ 30.664478] [ 30.664617] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.665189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.665979] Call Trace: [ 30.666214] [ 30.666399] dump_stack_lvl+0x91/0xf0 [ 30.666712] print_report+0xcc/0x620 [ 30.667259] ? __virt_addr_valid+0x102/0x340 [ 30.667607] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668002] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668433] kasan_report+0xbe/0xf0 [ 30.668739] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669136] vma_interval_tree_remove+0xc75/0xec0 [ 30.669543] vma_prepare+0xc54/0x11a0 [ 30.669863] __split_vma+0x5af/0x950 [ 30.670189] ? __pfx___split_vma+0x10/0x10 [ 30.670543] ? find_held_lock+0x2c/0x110 [ 30.670896] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.671276] ? lock_is_held_type+0x9f/0x120 [ 30.671634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.672029] ? mtree_range_walk+0x632/0x900 [ 30.672423] ? mas_walk+0x5c7/0x7c0 [ 30.672737] do_vmi_munmap+0x1f1/0x2b0 [ 30.673048] mmap_region+0x1f9/0x2660 [ 30.673363] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.673705] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.674181] ? __pfx_lock_acquire+0x10/0x10 [ 30.674518] ? __pfx_mmap_region+0x10/0x10 [ 30.674856] ? security_mmap_addr+0x7d/0xa0 [ 30.675193] ? get_unmapped_area+0x1f5/0x3f0 [ 30.675542] do_mmap+0x854/0xf00 [ 30.675823] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.676143] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.676586] ksys_mmap_pgoff+0x3af/0x500 [ 30.676926] do_syscall_64+0x3f/0x90 [ 30.677232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677655] RIP: 0033:0x7fa2d5530d82 [ 30.677989] 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 [ 30.679448] RSP: 002b:00007ffc056a44c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.680022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2d5530d82 [ 30.680629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2d496a000 [ 30.681169] RBP: 00007fa2d496a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.681703] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d25183980 [ 30.682272] R13: 00007ffc056a44e0 R14: 00007ffc056a4510 R15: 00007ffc056a4870 [ 30.682858] [ 30.683049] [ 30.683186] Allocated by task 213: [ 30.683467] kasan_save_stack+0x22/0x50 [ 30.683803] kasan_set_track+0x25/0x30 [ 30.684109] __kasan_slab_alloc+0x59/0x70 [ 30.684482] kmem_cache_alloc+0x16b/0x370 [ 30.684830] vm_area_dup+0x20/0x160 [ 30.685135] __split_vma+0x170/0x950 [ 30.685454] split_vma+0xc6/0x110 [ 30.685763] mprotect_fixup+0x8d2/0xb30 [ 30.686092] do_mprotect_pkey+0x87e/0xd40 [ 30.686454] __x64_sys_mprotect+0x78/0xc0 [ 30.686818] do_syscall_64+0x3f/0x90 [ 30.687152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687596] [ 30.687742] Freed by task 19: [ 30.688007] kasan_save_stack+0x22/0x50 [ 30.688417] kasan_set_track+0x25/0x30 [ 30.688760] kasan_save_free_info+0x2b/0x50 [ 30.689101] __kasan_slab_free+0x10a/0x190 [ 30.689426] kmem_cache_free+0x10d/0x4d0 [ 30.689745] rcu_core+0x8c8/0x2860 [ 30.690030] __do_softirq+0x1b7/0x7d4 [ 30.690343] [ 30.690493] Last potentially related work creation: [ 30.690904] kasan_save_stack+0x22/0x50 [ 30.691248] __kasan_record_aux_stack+0x8e/0xa0 [ 30.691645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692083] remove_vma+0x139/0x170 [ 30.692447] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.692840] do_vmi_munmap+0x1f1/0x2b0 [ 30.693167] __vm_munmap+0x138/0x3a0 [ 30.693491] __x64_sys_munmap+0x59/0x80 [ 30.693836] do_syscall_64+0x3f/0x90 [ 30.694136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.694586] [ 30.694744] Second to last potentially related work creation: [ 30.695220] kasan_save_stack+0x22/0x50 [ 30.695551] __kasan_record_aux_stack+0x8e/0xa0 [ 30.695904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.696338] remove_vma+0x139/0x170 [ 30.696653] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.697034] do_vmi_munmap+0x1f1/0x2b0 [ 30.697364] mmap_region+0x1f9/0x2660 [ 30.697686] do_mmap+0x854/0xf00 [ 30.697980] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.698314] ksys_mmap_pgoff+0x3af/0x500 [ 30.698631] do_syscall_64+0x3f/0x90 [ 30.698945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699353] [ 30.699491] The buggy address belongs to the object at ffff888016bbfcb0 [ 30.699491] which belongs to the cache vm_area_struct of size 168 [ 30.700495] The buggy address is located 88 bytes inside of [ 30.700495] freed 168-byte region [ffff888016bbfcb0, ffff888016bbfd58) [ 30.701430] [ 30.701570] The buggy address belongs to the physical page: [ 30.702037] page:0000000044b37ddb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bbf [ 30.702797] memcg:ffff888016835b01 [ 30.703096] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.703548] page_type: 0xffffffff() [ 30.703864] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f7740 dead000000000008 [ 30.704552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016835b01 [ 30.705142] page dumped because: kasan: bad access detected [ 30.705594] [ 30.705738] Memory state around the buggy address: [ 30.706121] ffff888016bbfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.706764] ffff888016bbfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.707341] >ffff888016bbfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.707924] ^ [ 30.708214] ffff888016bbfd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.708859] ffff888016bbfe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.709429] ================================================================== [ 30.710158] Disabling lock debugging due to kernel taint [ 32.196638] BUG: Bad rss-counter state mm:000000007bb287ba type:MM_FILEPAGES val:33 [ 32.197359] BUG: Bad rss-counter state mm:000000007bb287ba type:MM_ANONPAGES val:22 [ 32.566803] BUG: Bad rss-counter state mm:000000004a88e3e7 type:MM_FILEPAGES val:33 [ 32.567486] BUG: Bad rss-counter state mm:000000004a88e3e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42815' (ECDSA) to the list of known hosts. 2023/06/21 08:55:30 fuzzer started 2023/06/21 08:55:30 dialing manager at localhost:36067 2023/06/21 08:55:30 checking machine... 2023/06/21 08:55:30 checking revisions... [ 33.129765] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:55:30 testing simple program... [ 33.170795] cgroup: Unknown subsys name 'net' [ 33.213081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:55:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffdd9222708 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=00007f23355a9510000055ebd3ff0790 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002d5eef6 RSP=ffff888016af7798 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff888018eb5030 RIP=ffffffff8135b930 RFL=00000247 [---Z-PC] 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 00007f8fedb8f900 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=00007f8fee146618 CR3=000000001c936000 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=563412feff00545000000000000080fe 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