syzkaller login: [ 32.399291] BUG: Bad rss-counter state mm:000000003e917da1 type:MM_FILEPAGES val:33 [ 32.400514] BUG: Bad rss-counter state mm:000000003e917da1 type:MM_ANONPAGES val:22 [ 32.440148] ================================================================== [ 32.441164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.442172] Read of size 8 at addr ffff88800e89e058 by task sshd/221 [ 32.443028] [ 32.443247] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.444202] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.445322] Call Trace: [ 32.445644] [ 32.445935] dump_stack_lvl+0x91/0xf0 [ 32.446425] print_report+0xcc/0x620 [ 32.446912] ? __virt_addr_valid+0x102/0x340 [ 32.447461] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.448097] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.448716] kasan_report+0xbe/0xf0 [ 32.449190] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.449824] vma_interval_tree_remove+0xc75/0xec0 [ 32.450428] vma_prepare+0xc54/0x11a0 [ 32.450903] __split_vma+0x5af/0x950 [ 32.451371] ? __pfx___split_vma+0x10/0x10 [ 32.451903] ? find_held_lock+0x2c/0x110 [ 32.452421] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.452976] ? lock_is_held_type+0x9f/0x120 [ 32.453510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.454108] ? mtree_range_walk+0x632/0x900 [ 32.454655] ? mas_walk+0x5c7/0x7c0 [ 32.455127] do_vmi_munmap+0x1f1/0x2b0 [ 32.455616] mmap_region+0x1f9/0x2660 [ 32.456115] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.456625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.457337] ? __pfx_lock_acquire+0x10/0x10 [ 32.457866] ? __pfx_mmap_region+0x10/0x10 [ 32.458392] ? security_mmap_addr+0x7d/0xa0 [ 32.458916] ? get_unmapped_area+0x1f5/0x3f0 [ 32.459464] do_mmap+0x854/0xf00 [ 32.459924] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.460414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.460978] ksys_mmap_pgoff+0x3af/0x500 [ 32.461483] do_syscall_64+0x3f/0x90 [ 32.461956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.462596] RIP: 0033:0x7fdcca1d3d82 [ 32.463053] 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 [ 32.465175] RSP: 002b:00007ffdba1eb808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.466077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcca1d3d82 [ 32.466919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcc960d000 [ 32.467760] RBP: 00007fdcc960d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.468603] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c4745bb20 [ 32.469450] R13: 00007ffdba1eb820 R14: 00007ffdba1eb850 R15: 00007ffdba1ebbb0 [ 32.470302] [ 32.470591] [ 32.470806] Allocated by task 214: [ 32.471230] kasan_save_stack+0x22/0x50 [ 32.471750] kasan_set_track+0x25/0x30 [ 32.472258] __kasan_slab_alloc+0x59/0x70 [ 32.472776] kmem_cache_alloc+0x16b/0x370 [ 32.473283] vm_area_dup+0x20/0x160 [ 32.473732] __split_vma+0x170/0x950 [ 32.474190] split_vma+0xc6/0x110 [ 32.474628] mprotect_fixup+0x8d2/0xb30 [ 32.475123] do_mprotect_pkey+0x87e/0xd40 [ 32.475634] __x64_sys_mprotect+0x78/0xc0 [ 32.476167] do_syscall_64+0x3f/0x90 [ 32.476636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.477276] [ 32.477493] Freed by task 203: [ 32.477888] kasan_save_stack+0x22/0x50 [ 32.478383] kasan_set_track+0x25/0x30 [ 32.478878] kasan_save_free_info+0x2b/0x50 [ 32.479401] __kasan_slab_free+0x10a/0x190 [ 32.479941] kmem_cache_free+0x10d/0x4d0 [ 32.480444] rcu_core+0x8c8/0x2860 [ 32.480886] __do_softirq+0x1b7/0x7d4 [ 32.481431] [ 32.481645] Last potentially related work creation: [ 32.482219] kasan_save_stack+0x22/0x50 [ 32.482721] __kasan_record_aux_stack+0x8e/0xa0 [ 32.483301] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.483952] remove_vma+0x139/0x170 [ 32.484399] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.484959] do_vmi_munmap+0x1f1/0x2b0 [ 32.485440] __vm_munmap+0x138/0x3a0 [ 32.485912] __x64_sys_munmap+0x59/0x80 [ 32.486405] do_syscall_64+0x3f/0x90 [ 32.486871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.487511] [ 32.487724] Second to last potentially related work creation: [ 32.488411] kasan_save_stack+0x22/0x50 [ 32.488919] __kasan_record_aux_stack+0x8e/0xa0 [ 32.489488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.490120] remove_vma+0x139/0x170 [ 32.490565] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.491122] do_vmi_munmap+0x1f1/0x2b0 [ 32.491618] mmap_region+0x1f9/0x2660 [ 32.492120] do_mmap+0x854/0xf00 [ 32.492552] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.493047] ksys_mmap_pgoff+0x3af/0x500 [ 32.493554] do_syscall_64+0x3f/0x90 [ 32.494027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.494673] [ 32.494885] The buggy address belongs to the object at ffff88800e89e000 [ 32.494885] which belongs to the cache vm_area_struct of size 168 [ 32.496342] The buggy address is located 88 bytes inside of [ 32.496342] freed 168-byte region [ffff88800e89e000, ffff88800e89e0a8) [ 32.497741] [ 32.497953] The buggy address belongs to the physical page: [ 32.498609] page:00000000aa49d4a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe89e [ 32.499689] memcg:ffff888009a2d201 [ 32.500130] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.500768] page_type: 0xffffffff() [ 32.501213] raw: 0100000000000200 ffff88800879fc80 ffffea00003a29c0 0000000000000006 [ 32.502128] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a2d201 [ 32.503031] page dumped because: kasan: bad access detected [ 32.503690] [ 32.503915] Memory state around the buggy address: [ 32.504494] ffff88800e89df00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.505334] ffff88800e89df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.506193] >ffff88800e89e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.507034] ^ [ 32.507754] ffff88800e89e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.508613] ffff88800e89e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.509464] ================================================================== [ 32.510378] Disabling lock debugging due to kernel taint [ 34.230282] BUG: Bad rss-counter state mm:000000008c7f3dfa type:MM_FILEPAGES val:33 [ 34.231263] BUG: Bad rss-counter state mm:000000008c7f3dfa type:MM_ANONPAGES val:22 [ 34.714537] BUG: Bad rss-counter state mm:00000000f8b1ea96 type:MM_FILEPAGES val:33 [ 34.715584] BUG: Bad rss-counter state mm:00000000f8b1ea96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17043' (ECDSA) to the list of known hosts. 2023/06/20 08:36:32 fuzzer started 2023/06/20 08:36:32 dialing manager at localhost:44161 2023/06/20 08:36:32 checking machine... 2023/06/20 08:36:32 checking revisions... [ 35.454286] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:36:32 testing simple program... [ 35.513125] cgroup: Unknown subsys name 'net' [ 35.580938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:36:30 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=00007ffdd1f6bcf8 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=00007f525a82c5100000558a31cf8790 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=ffff88800c099dd0 RBX=ffff88800bb383f8 RCX=1ffff110017034d2 RDX=dffffc0000000000 RSI=ffff88800e053e30 RDI=ffff88800bb38428 RBP=ffff8880103d9eb8 RSP=ffff88800f147c08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e053e20 R13=0000000000000000 R14=ffff88800d751c28 R15=ffff88800d751be0 RIP=ffffffff81847508 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 00007ff995929900 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=00007ff995ee10b0 CR3=000000000d678000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000