syzkaller login: [ 31.209326] BUG: Bad rss-counter state mm:00000000955e390f type:MM_FILEPAGES val:33 [ 31.210630] BUG: Bad rss-counter state mm:00000000955e390f type:MM_ANONPAGES val:22 [ 31.373221] ================================================================== [ 31.374139] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.375100] Read of size 8 at addr ffff88800c991df0 by task sshd/219 [ 31.375948] [ 31.376165] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.377026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.377998] Call Trace: [ 31.378338] [ 31.378624] dump_stack_lvl+0x91/0xf0 [ 31.379116] print_report+0xcc/0x620 [ 31.379605] ? __virt_addr_valid+0x102/0x340 [ 31.380154] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.380776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.381391] kasan_report+0xbe/0xf0 [ 31.381868] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.382494] vma_interval_tree_remove+0xc75/0xec0 [ 31.383086] vma_prepare+0xc54/0x11a0 [ 31.383571] __split_vma+0x5af/0x950 [ 31.384038] ? __pfx___split_vma+0x10/0x10 [ 31.384562] ? find_held_lock+0x2c/0x110 [ 31.385079] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.385642] ? lock_is_held_type+0x9f/0x120 [ 31.386174] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.386794] ? mtree_range_walk+0x632/0x900 [ 31.387336] ? mas_walk+0x5c7/0x7c0 [ 31.387804] do_vmi_munmap+0x1f1/0x2b0 [ 31.388289] mmap_region+0x1f9/0x2660 [ 31.388770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.389271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.389975] ? __pfx_lock_acquire+0x10/0x10 [ 31.390507] ? __pfx_mmap_region+0x10/0x10 [ 31.391029] ? security_mmap_addr+0x7d/0xa0 [ 31.391551] ? get_unmapped_area+0x1f5/0x3f0 [ 31.392094] do_mmap+0x854/0xf00 [ 31.392532] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.393019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.393576] ksys_mmap_pgoff+0x3af/0x500 [ 31.394081] do_syscall_64+0x3f/0x90 [ 31.394571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395212] RIP: 0033:0x7f3522a5ed82 [ 31.395665] 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 [ 31.397764] RSP: 002b:00007ffc8bc709b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.398662] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3522a5ed82 [ 31.399506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3521e98000 [ 31.400340] RBP: 00007f3521e98000 R08: 0000000000000009 R09: 0000000000001000 [ 31.401182] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562280c85ec0 [ 31.402019] R13: 00007ffc8bc709d0 R14: 00007ffc8bc70a00 R15: 00007ffc8bc70d60 [ 31.402887] [ 31.403176] [ 31.403389] Allocated by task 212: [ 31.403815] kasan_save_stack+0x22/0x50 [ 31.404310] kasan_set_track+0x25/0x30 [ 31.404797] __kasan_slab_alloc+0x59/0x70 [ 31.405312] kmem_cache_alloc+0x16b/0x370 [ 31.405829] vm_area_dup+0x20/0x160 [ 31.406283] __split_vma+0x170/0x950 [ 31.406749] split_vma+0xc6/0x110 [ 31.407185] mprotect_fixup+0x8d2/0xb30 [ 31.407684] do_mprotect_pkey+0x87e/0xd40 [ 31.408198] __x64_sys_mprotect+0x78/0xc0 [ 31.408718] do_syscall_64+0x3f/0x90 [ 31.409186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.409829] [ 31.410044] Freed by task 19: [ 31.410437] kasan_save_stack+0x22/0x50 [ 31.410940] kasan_set_track+0x25/0x30 [ 31.411429] kasan_save_free_info+0x2b/0x50 [ 31.411955] __kasan_slab_free+0x10a/0x190 [ 31.412477] kmem_cache_free+0x10d/0x4d0 [ 31.412983] rcu_core+0x8c8/0x2860 [ 31.413422] __do_softirq+0x1b7/0x7d4 [ 31.413895] [ 31.414108] Last potentially related work creation: [ 31.414698] kasan_save_stack+0x22/0x50 [ 31.415195] __kasan_record_aux_stack+0x8e/0xa0 [ 31.415763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.416401] remove_vma+0x139/0x170 [ 31.416851] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.417406] do_vmi_munmap+0x1f1/0x2b0 [ 31.417893] __vm_munmap+0x138/0x3a0 [ 31.418378] __x64_sys_munmap+0x59/0x80 [ 31.418876] do_syscall_64+0x3f/0x90 [ 31.419349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.419982] [ 31.420195] Second to last potentially related work creation: [ 31.420873] kasan_save_stack+0x22/0x50 [ 31.421371] __kasan_record_aux_stack+0x8e/0xa0 [ 31.421947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.422588] remove_vma+0x139/0x170 [ 31.423036] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.423587] do_vmi_munmap+0x1f1/0x2b0 [ 31.424068] mmap_region+0x1f9/0x2660 [ 31.424542] do_mmap+0x854/0xf00 [ 31.424969] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.425451] ksys_mmap_pgoff+0x7d/0x500 [ 31.425940] do_syscall_64+0x3f/0x90 [ 31.426416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.427057] [ 31.427271] The buggy address belongs to the object at ffff88800c991d98 [ 31.427271] which belongs to the cache vm_area_struct of size 168 [ 31.428741] The buggy address is located 88 bytes inside of [ 31.428741] freed 168-byte region [ffff88800c991d98, ffff88800c991e40) [ 31.430145] [ 31.430379] The buggy address belongs to the physical page: [ 31.431040] page:00000000a30e35e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc991 [ 31.432109] memcg:ffff88800e7dac01 [ 31.432532] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.433166] page_type: 0xffffffff() [ 31.433616] raw: 0100000000000200 ffff8880087a0c80 ffffea000051e500 dead000000000002 [ 31.434534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7dac01 [ 31.435427] page dumped because: kasan: bad access detected [ 31.436075] [ 31.436287] Memory state around the buggy address: [ 31.436864] ffff88800c991c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.437711] ffff88800c991d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.438577] >ffff88800c991d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.439410] ^ [ 31.440212] ffff88800c991e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.441060] ffff88800c991e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.441899] ================================================================== [ 31.443001] Disabling lock debugging due to kernel taint [ 33.691327] BUG: Bad rss-counter state mm:00000000354aa5a2 type:MM_FILEPAGES val:33 [ 33.692560] BUG: Bad rss-counter state mm:00000000354aa5a2 type:MM_ANONPAGES val:22 [ 34.074869] BUG: Bad rss-counter state mm:0000000007dec2b3 type:MM_FILEPAGES val:33 [ 34.075911] BUG: Bad rss-counter state mm:0000000007dec2b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7552' (ECDSA) to the list of known hosts. 2023/06/20 14:25:28 fuzzer started 2023/06/20 14:25:28 dialing manager at localhost:36067 2023/06/20 14:25:28 checking machine... 2023/06/20 14:25:28 checking revisions... [ 34.802458] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:25:28 testing simple program... [ 34.850071] cgroup: Unknown subsys name 'net' [ 34.907251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:25:28 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=00007f847e808cc0 CR3=0000000008c70000 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=c524c41c770a3a9a3b458ac757a1dcbe XMM02=eff9b2d0a8fce9cb000000000011abb8 XMM03=2c67c8bc2e329bc3000000000011ace0 XMM04=274a7919a09c388800000000000ae988 XMM05=39ce565ca72494850000000000134448 XMM06=dfcdbad4f1609c3700000000001332e0 XMM07=fb795ef6d65770560000000000122180 XMM08=2c67c8bc2e329bc3000000000011ace0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100269b613 RBX=ffff8880134db068 RCX=1ffff11002637fdc RDX=dffffc0000000000 RSI=ffff888016196890 RDI=ffff8880134db098 RBP=ffff8880131bfeb0 RSP=ffff88800f09fc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888016196758 R13=0000000000000000 R14=ffff88801a99caf8 R15=ffff88801a99cab0 RIP=ffffffff8184767e 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 00007f28b72e1900 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=00007f28b78990b0 CR3=000000001d0c2000 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=2038323a35323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a35323a3431203032 XMM08=64696720303d64697520612f6e3d6469 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000