syzkaller login: [ 38.693861] BUG: Bad rss-counter state mm:00000000367ae10e type:MM_FILEPAGES val:33 [ 38.695323] BUG: Bad rss-counter state mm:00000000367ae10e type:MM_ANONPAGES val:22 [ 38.863187] ================================================================== [ 38.864298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.865253] Read of size 8 at addr ffff88800e0e53f8 by task sshd/220 [ 38.866193] [ 38.866412] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.867300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.868314] Call Trace: [ 38.868633] [ 38.868921] dump_stack_lvl+0x91/0xf0 [ 38.869416] print_report+0xcc/0x620 [ 38.869896] ? __virt_addr_valid+0x102/0x340 [ 38.870455] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871076] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871704] kasan_report+0xbe/0xf0 [ 38.872297] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873016] vma_interval_tree_remove+0xc75/0xec0 [ 38.873640] vma_prepare+0xc54/0x11a0 [ 38.874145] __split_vma+0x5af/0x950 [ 38.874637] ? __pfx___split_vma+0x10/0x10 [ 38.875188] ? find_held_lock+0x2c/0x110 [ 38.875739] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.876322] ? lock_is_held_type+0x9f/0x120 [ 38.876872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.877501] ? mtree_range_walk+0x632/0x900 [ 38.878072] ? mas_walk+0x5c7/0x7c0 [ 38.878572] do_vmi_munmap+0x1f1/0x2b0 [ 38.879081] mmap_region+0x1f9/0x2660 [ 38.879589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.880129] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.880872] ? __pfx_lock_acquire+0x10/0x10 [ 38.881426] ? __pfx_mmap_region+0x10/0x10 [ 38.881976] ? security_mmap_addr+0x7d/0xa0 [ 38.882522] ? get_unmapped_area+0x1f5/0x3f0 [ 38.883088] do_mmap+0x854/0xf00 [ 38.883554] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.884063] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.884642] ksys_mmap_pgoff+0x3af/0x500 [ 38.885166] do_syscall_64+0x3f/0x90 [ 38.885661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886334] RIP: 0033:0x7f857038ad82 [ 38.886801] 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 [ 38.889009] RSP: 002b:00007ffd2a32a208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.889939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f857038ad82 [ 38.890811] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f856f7c4000 [ 38.891709] RBP: 00007f856f7c4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.892585] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d213e82f70 [ 38.893466] R13: 00007ffd2a32a220 R14: 00007ffd2a32a250 R15: 00007ffd2a32a5b0 [ 38.894360] [ 38.894660] [ 38.894883] Allocated by task 213: [ 38.895322] kasan_save_stack+0x22/0x50 [ 38.895849] kasan_set_track+0x25/0x30 [ 38.896369] __kasan_slab_alloc+0x59/0x70 [ 38.896913] kmem_cache_alloc+0x16b/0x370 [ 38.897449] vm_area_dup+0x20/0x160 [ 38.897920] __split_vma+0x170/0x950 [ 38.898411] split_vma+0xc6/0x110 [ 38.898867] mprotect_fixup+0x8d2/0xb30 [ 38.899388] do_mprotect_pkey+0x87e/0xd40 [ 38.899948] __x64_sys_mprotect+0x78/0xc0 [ 38.900478] do_syscall_64+0x3f/0x90 [ 38.900970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901641] [ 38.901861] Freed by task 19: [ 38.902254] kasan_save_stack+0x22/0x50 [ 38.902770] kasan_set_track+0x25/0x30 [ 38.903281] kasan_save_free_info+0x2b/0x50 [ 38.903847] __kasan_slab_free+0x10a/0x190 [ 38.904403] kmem_cache_free+0x10d/0x4d0 [ 38.904925] rcu_core+0x8c8/0x2860 [ 38.905383] __do_softirq+0x1b7/0x7d4 [ 38.905877] [ 38.906097] Last potentially related work creation: [ 38.906708] kasan_save_stack+0x22/0x50 [ 38.907241] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.908616] remove_vma+0x139/0x170 [ 38.909081] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.909658] do_vmi_munmap+0x1f1/0x2b0 [ 38.910163] __vm_munmap+0x138/0x3a0 [ 38.910644] __x64_sys_munmap+0x59/0x80 [ 38.911170] do_syscall_64+0x3f/0x90 [ 38.911671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912330] [ 38.912554] Second to last potentially related work creation: [ 38.913264] kasan_save_stack+0x22/0x50 [ 38.913782] __kasan_record_aux_stack+0x8e/0xa0 [ 38.914382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.915049] remove_vma+0x139/0x170 [ 38.915530] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.916101] do_vmi_munmap+0x1f1/0x2b0 [ 38.916606] mmap_region+0x1f9/0x2660 [ 38.917104] do_mmap+0x854/0xf00 [ 38.917553] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.918057] ksys_mmap_pgoff+0x7d/0x500 [ 38.918566] do_syscall_64+0x3f/0x90 [ 38.919058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919750] [ 38.919971] The buggy address belongs to the object at ffff88800e0e53a0 [ 38.919971] which belongs to the cache vm_area_struct of size 168 [ 38.921499] The buggy address is located 88 bytes inside of [ 38.921499] freed 168-byte region [ffff88800e0e53a0, ffff88800e0e5448) [ 38.922947] [ 38.923172] The buggy address belongs to the physical page: [ 38.923863] page:00000000911160bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0e5 [ 38.924986] memcg:ffff888009a6ac01 [ 38.925427] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.926092] page_type: 0xffffffff() [ 38.926563] raw: 0100000000000200 ffff8880087a0c80 ffffea000039c9c0 dead000000000004 [ 38.927515] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a6ac01 [ 38.928457] page dumped because: kasan: bad access detected [ 38.929146] [ 38.929369] Memory state around the buggy address: [ 38.929965] ffff88800e0e5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.930849] ffff88800e0e5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.931754] >ffff88800e0e5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.932633] ^ [ 38.933509] ffff88800e0e5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.934430] ffff88800e0e5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.935393] ================================================================== [ 38.936383] Disabling lock debugging due to kernel taint [ 41.192848] BUG: Bad rss-counter state mm:00000000a08bee75 type:MM_FILEPAGES val:33 [ 41.193922] BUG: Bad rss-counter state mm:00000000a08bee75 type:MM_ANONPAGES val:22 [ 41.758029] BUG: Bad rss-counter state mm:00000000e692d0a4 type:MM_FILEPAGES val:33 [ 41.759245] BUG: Bad rss-counter state mm:00000000e692d0a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57912' (ECDSA) to the list of known hosts. 2023/06/20 11:34:56 fuzzer started 2023/06/20 11:34:56 dialing manager at localhost:36067 2023/06/20 11:34:56 checking machine... 2023/06/20 11:34:56 checking revisions... [ 42.441994] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:34:57 testing simple program... [ 42.490638] cgroup: Unknown subsys name 'net' [ 42.532579] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:34:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff852bfeb0 RCX=ffffffff8451e79a RDX=1ffffffff0a57fd7 RSI=0000000000000008 RDI=ffffffff852bfeb8 RBP=ffff88800d9dfb50 RSP=ffff88800d9dfa20 R8 =0000000000000000 R9 =ffffed1001b01000 R10=ffff88800d808007 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff88800d808000 R14=0000000000000000 R15=ffff88800d808450 RIP=ffffffff8451da59 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 00007f3442d48900 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=00007f3442267000 CR3=000000000c728000 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=2a372ad6a7bf93a7624524c57b4b8fb8 XMM02=eff9b2d0a8fce9cb000000000011af50 XMM03=2c67c8bc2e329bc3000000000011b078 XMM04=264b87f8e868335600000000000ae988 XMM05=ad6d08639e112a200000000000133de8 XMM06=447220e9b9f97e620000000000132818 XMM07=fb795ef6d65770560000000000121a38 XMM08=2c67c8bc2e329bc3000000000011b078 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880097aff58 RCX=1ffff110012f5ff9 RDX=000000000000000c RSI=00007fffc7723fc8 RDI=0000000000000009 RBP=ffff8880097aff48 RSP=ffff8880097aff18 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880097aff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363c004 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 00007fcfe4551900 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=00007fcfe4b08618 CR3=0000000016588000 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=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