syzkaller login: [ 38.273213] BUG: Bad rss-counter state mm:000000006f3eced5 type:MM_FILEPAGES val:33 [ 38.274439] BUG: Bad rss-counter state mm:000000006f3eced5 type:MM_ANONPAGES val:22 [ 38.415919] ================================================================== [ 38.416855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.417825] Read of size 8 at addr ffff88801608ca50 by task sshd/221 [ 38.418625] [ 38.418844] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.419803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.420774] Call Trace: [ 38.421089] [ 38.421410] dump_stack_lvl+0x91/0xf0 [ 38.421901] print_report+0xcc/0x620 [ 38.422415] ? __virt_addr_valid+0x102/0x340 [ 38.422971] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.423612] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.424223] kasan_report+0xbe/0xf0 [ 38.424700] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.425334] vma_interval_tree_remove+0xc75/0xec0 [ 38.425954] vma_prepare+0xc54/0x11a0 [ 38.426456] __split_vma+0x5af/0x950 [ 38.426921] ? __pfx___split_vma+0x10/0x10 [ 38.427462] ? find_held_lock+0x2c/0x110 [ 38.428029] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.428632] ? lock_is_held_type+0x9f/0x120 [ 38.429179] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.429848] ? mtree_range_walk+0x632/0x900 [ 38.430458] ? mas_walk+0x5c7/0x7c0 [ 38.430943] do_vmi_munmap+0x1f1/0x2b0 [ 38.431571] mmap_region+0x1f9/0x2660 [ 38.432196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.432881] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.433814] ? __pfx_lock_acquire+0x10/0x10 [ 38.434539] ? __pfx_mmap_region+0x10/0x10 [ 38.435245] ? security_mmap_addr+0x7d/0xa0 [ 38.435810] ? get_unmapped_area+0x1f5/0x3f0 [ 38.436374] do_mmap+0x854/0xf00 [ 38.436814] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.437328] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.437890] ksys_mmap_pgoff+0x3af/0x500 [ 38.438448] do_syscall_64+0x3f/0x90 [ 38.438947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.439592] RIP: 0033:0x7f4394ba0d82 [ 38.440060] 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 [ 38.442230] RSP: 002b:00007ffdabab85d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.443180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4394ba0d82 [ 38.444024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4393fda000 [ 38.444867] RBP: 00007f4393fda000 R08: 0000000000000009 R09: 0000000000001000 [ 38.445709] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d60c061b20 [ 38.446566] R13: 00007ffdabab85f0 R14: 00007ffdabab8620 R15: 00007ffdabab8980 [ 38.447441] [ 38.447734] [ 38.447945] Allocated by task 214: [ 38.448382] kasan_save_stack+0x22/0x50 [ 38.448888] kasan_set_track+0x25/0x30 [ 38.449405] __kasan_slab_alloc+0x59/0x70 [ 38.449961] kmem_cache_alloc+0x16b/0x370 [ 38.450554] vm_area_dup+0x20/0x160 [ 38.451027] __split_vma+0x170/0x950 [ 38.451523] split_vma+0xc6/0x110 [ 38.451979] mprotect_fixup+0x8d2/0xb30 [ 38.452500] do_mprotect_pkey+0x87e/0xd40 [ 38.453015] __x64_sys_mprotect+0x78/0xc0 [ 38.453547] do_syscall_64+0x3f/0x90 [ 38.454022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.454700] [ 38.454920] Freed by task 214: [ 38.455346] kasan_save_stack+0x22/0x50 [ 38.455860] kasan_set_track+0x25/0x30 [ 38.456373] kasan_save_free_info+0x2b/0x50 [ 38.456945] __kasan_slab_free+0x10a/0x190 [ 38.457557] kmem_cache_free+0x10d/0x4d0 [ 38.458214] rcu_core+0x8c8/0x2860 [ 38.458761] __do_softirq+0x1b7/0x7d4 [ 38.459237] [ 38.459464] Last potentially related work creation: [ 38.460045] kasan_save_stack+0x22/0x50 [ 38.460553] __kasan_record_aux_stack+0x8e/0xa0 [ 38.461125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.461795] remove_vma+0x139/0x170 [ 38.462276] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.462842] do_vmi_munmap+0x1f1/0x2b0 [ 38.463347] __vm_munmap+0x138/0x3a0 [ 38.463839] __x64_sys_munmap+0x59/0x80 [ 38.464349] do_syscall_64+0x3f/0x90 [ 38.464842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.465532] [ 38.465746] The buggy address belongs to the object at ffff88801608c9f8 [ 38.465746] which belongs to the cache vm_area_struct of size 168 [ 38.467229] The buggy address is located 88 bytes inside of [ 38.467229] freed 168-byte region [ffff88801608c9f8, ffff88801608caa0) [ 38.468651] [ 38.468864] The buggy address belongs to the physical page: [ 38.469538] page:00000000e1449a6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1608c [ 38.470765] memcg:ffff888009560201 [ 38.471220] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.471884] page_type: 0xffffffff() [ 38.472350] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.473322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009560201 [ 38.474298] page dumped because: kasan: bad access detected [ 38.474989] [ 38.475212] Memory state around the buggy address: [ 38.475830] ffff88801608c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.476750] ffff88801608c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.477673] >ffff88801608ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.478600] ^ [ 38.479342] ffff88801608ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.480240] ffff88801608cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.481150] ================================================================== [ 38.482224] Disabling lock debugging due to kernel taint [ 40.438292] BUG: Bad rss-counter state mm:00000000c93b0b06 type:MM_FILEPAGES val:33 [ 40.439467] BUG: Bad rss-counter state mm:00000000c93b0b06 type:MM_ANONPAGES val:22 [ 40.817099] BUG: Bad rss-counter state mm:0000000069b0ec8d type:MM_FILEPAGES val:33 [ 40.818571] BUG: Bad rss-counter state mm:0000000069b0ec8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22588' (ECDSA) to the list of known hosts. 2023/06/19 18:52:07 fuzzer started 2023/06/19 18:52:07 dialing manager at localhost:44161 2023/06/19 18:52:07 checking machine... 2023/06/19 18:52:07 checking revisions... [ 41.565805] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:52:08 testing simple program... [ 41.619914] cgroup: Unknown subsys name 'net' [ 41.659604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:52:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000080 RCX=ffffffff8372651a RDX=ffff88800f0451c0 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000081 RSP=ffff88800f1577b8 R8 =0000000000000004 R9 =000000000000000a R10=0000000000000080 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96ee0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c01e1 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 00007fdef14e6900 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=00007fdef1a9d618 CR3=00000000160a2000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f95715002d0 CR3=000000000e68a000 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=2037303a32353a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a32353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000