syzkaller login: [ 31.296633] BUG: Bad rss-counter state mm:0000000092a146af type:MM_FILEPAGES val:33 [ 31.297527] BUG: Bad rss-counter state mm:0000000092a146af type:MM_ANONPAGES val:22 [ 31.412876] ================================================================== [ 31.413619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.414232] Read of size 8 at addr ffff88800ca45968 by task sshd/219 [ 31.414743] [ 31.414891] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.415492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.416205] Call Trace: [ 31.416434] [ 31.416628] dump_stack_lvl+0x91/0xf0 [ 31.417235] print_report+0xcc/0x620 [ 31.417598] ? __virt_addr_valid+0x102/0x340 [ 31.417983] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.418398] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.418809] kasan_report+0xbe/0xf0 [ 31.419124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419580] vma_interval_tree_remove+0xc75/0xec0 [ 31.420035] vma_prepare+0xc54/0x11a0 [ 31.420405] __split_vma+0x5af/0x950 [ 31.420749] ? __pfx___split_vma+0x10/0x10 [ 31.421137] ? find_held_lock+0x2c/0x110 [ 31.421497] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.421882] ? lock_is_held_type+0x9f/0x120 [ 31.422240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.422640] ? mtree_range_walk+0x632/0x900 [ 31.423014] ? mas_walk+0x5c7/0x7c0 [ 31.423338] do_vmi_munmap+0x1f1/0x2b0 [ 31.423715] mmap_region+0x1f9/0x2660 [ 31.424095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.424447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.424983] ? __pfx_lock_acquire+0x10/0x10 [ 31.425340] ? __pfx_mmap_region+0x10/0x10 [ 31.425698] ? security_mmap_addr+0x7d/0xa0 [ 31.426054] ? get_unmapped_area+0x1f5/0x3f0 [ 31.426424] do_mmap+0x854/0xf00 [ 31.426751] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.427104] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.427488] ksys_mmap_pgoff+0x3af/0x500 [ 31.427853] do_syscall_64+0x3f/0x90 [ 31.428253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428723] RIP: 0033:0x7f3aab96ad82 [ 31.429028] 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 [ 31.430478] RSP: 002b:00007ffc4c7d7688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.431098] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3aab96ad82 [ 31.431719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3aaada4000 [ 31.432325] RBP: 00007f3aaada4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.432914] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559415b36b20 [ 31.433497] R13: 00007ffc4c7d76a0 R14: 00007ffc4c7d76d0 R15: 00007ffc4c7d7a30 [ 31.434121] [ 31.434319] [ 31.434472] Allocated by task 212: [ 31.434767] kasan_save_stack+0x22/0x50 [ 31.435119] kasan_set_track+0x25/0x30 [ 31.435464] __kasan_slab_alloc+0x59/0x70 [ 31.435823] kmem_cache_alloc+0x16b/0x370 [ 31.436241] vm_area_dup+0x20/0x160 [ 31.436563] __split_vma+0x170/0x950 [ 31.436876] split_vma+0xc6/0x110 [ 31.437163] mprotect_fixup+0x8d2/0xb30 [ 31.437501] do_mprotect_pkey+0x87e/0xd40 [ 31.437877] __x64_sys_mprotect+0x78/0xc0 [ 31.438228] do_syscall_64+0x3f/0x90 [ 31.438550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.438970] [ 31.439115] Freed by task 212: [ 31.439372] kasan_save_stack+0x22/0x50 [ 31.439705] kasan_set_track+0x25/0x30 [ 31.440076] kasan_save_free_info+0x2b/0x50 [ 31.440424] __kasan_slab_free+0x10a/0x190 [ 31.440769] kmem_cache_free+0x10d/0x4d0 [ 31.441099] rcu_core+0x8c8/0x2860 [ 31.441380] __do_softirq+0x1b7/0x7d4 [ 31.441721] [ 31.441864] Last potentially related work creation: [ 31.442250] kasan_save_stack+0x22/0x50 [ 31.442583] __kasan_record_aux_stack+0x8e/0xa0 [ 31.442978] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.443400] remove_vma+0x139/0x170 [ 31.443718] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.444131] do_vmi_munmap+0x1f1/0x2b0 [ 31.444464] __vm_munmap+0x138/0x3a0 [ 31.444797] __x64_sys_munmap+0x59/0x80 [ 31.445129] do_syscall_64+0x3f/0x90 [ 31.445435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.445882] [ 31.446028] The buggy address belongs to the object at ffff88800ca45910 [ 31.446028] which belongs to the cache vm_area_struct of size 168 [ 31.446999] The buggy address is located 88 bytes inside of [ 31.446999] freed 168-byte region [ffff88800ca45910, ffff88800ca459b8) [ 31.447950] [ 31.448102] The buggy address belongs to the physical page: [ 31.448527] page:00000000b6e06af4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca45 [ 31.449244] memcg:ffff88800e7a9101 [ 31.449524] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.449977] page_type: 0xffffffff() [ 31.450276] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393b00 dead000000000004 [ 31.450893] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7a9101 [ 31.451513] page dumped because: kasan: bad access detected [ 31.452031] [ 31.452171] Memory state around the buggy address: [ 31.452562] ffff88800ca45800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.453168] ffff88800ca45880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.453792] >ffff88800ca45900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.454377] ^ [ 31.454914] ffff88800ca45980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.455491] ffff88800ca45a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.456164] ================================================================== [ 31.456917] Disabling lock debugging due to kernel taint [ 33.370766] BUG: Bad rss-counter state mm:000000009bf09d70 type:MM_FILEPAGES val:33 [ 33.371546] BUG: Bad rss-counter state mm:000000009bf09d70 type:MM_ANONPAGES val:22 [ 33.810020] BUG: Bad rss-counter state mm:000000008cdeae4e type:MM_FILEPAGES val:33 [ 33.810811] BUG: Bad rss-counter state mm:000000008cdeae4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48847' (ECDSA) to the list of known hosts. 2023/06/21 08:58:18 fuzzer started 2023/06/21 08:58:18 dialing manager at localhost:36067 2023/06/21 08:58:18 checking machine... 2023/06/21 08:58:18 checking revisions... [ 34.361842] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:58:18 testing simple program... [ 34.392770] cgroup: Unknown subsys name 'net' [ 34.427862] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:58:17 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=00007ffdb46bde98 CR3=0000000014546000 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=2037313a38353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a38353a3830203132 XMM08=00007f50b4009df00000004300000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8608a556 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff8608a558 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09b40 R15=ffff88806cf09a98 RIP=ffffffff81131204 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 00007f36eaa46900 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=00007ffd87061000 CR3=000000000f05c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000