syzkaller login: [ 30.533042] BUG: Bad rss-counter state mm:00000000e268f257 type:MM_FILEPAGES val:33 [ 30.534241] BUG: Bad rss-counter state mm:00000000e268f257 type:MM_ANONPAGES val:22 [ 30.691643] ================================================================== [ 30.692547] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.693494] Read of size 8 at addr ffff888018e3db38 by task sshd/220 [ 30.694263] [ 30.694477] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.695442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.696424] Call Trace: [ 30.696767] [ 30.697057] dump_stack_lvl+0x91/0xf0 [ 30.697596] print_report+0xcc/0x620 [ 30.698124] ? __virt_addr_valid+0x102/0x340 [ 30.698679] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.699295] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.699923] kasan_report+0xbe/0xf0 [ 30.700404] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.701041] vma_interval_tree_remove+0xc75/0xec0 [ 30.701648] vma_prepare+0xc54/0x11a0 [ 30.702132] __split_vma+0x5af/0x950 [ 30.702597] ? __pfx___split_vma+0x10/0x10 [ 30.703126] ? find_held_lock+0x2c/0x110 [ 30.703647] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.704214] ? lock_is_held_type+0x9f/0x120 [ 30.704781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.705398] ? mtree_range_walk+0x632/0x900 [ 30.705951] ? mas_walk+0x5c7/0x7c0 [ 30.706431] do_vmi_munmap+0x1f1/0x2b0 [ 30.706932] mmap_region+0x1f9/0x2660 [ 30.707408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.707923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.708630] ? __pfx_lock_acquire+0x10/0x10 [ 30.709180] ? __pfx_mmap_region+0x10/0x10 [ 30.709707] ? security_mmap_addr+0x7d/0xa0 [ 30.710242] ? get_unmapped_area+0x1f5/0x3f0 [ 30.710788] do_mmap+0x854/0xf00 [ 30.711231] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.711728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.712295] ksys_mmap_pgoff+0x3af/0x500 [ 30.712806] do_syscall_64+0x3f/0x90 [ 30.713294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.713940] RIP: 0033:0x7fc8cd06fd82 [ 30.714397] 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 [ 30.716512] RSP: 002b:00007fff643a7358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.717431] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8cd06fd82 [ 30.718283] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8cc4a9000 [ 30.719131] RBP: 00007fc8cc4a9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.719992] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596c336aec0 [ 30.720839] R13: 00007fff643a7370 R14: 00007fff643a73a0 R15: 00007fff643a7700 [ 30.721687] [ 30.721979] [ 30.722193] Allocated by task 213: [ 30.722623] kasan_save_stack+0x22/0x50 [ 30.723131] kasan_set_track+0x25/0x30 [ 30.723619] __kasan_slab_alloc+0x59/0x70 [ 30.724141] kmem_cache_alloc+0x16b/0x370 [ 30.724680] vm_area_dup+0x20/0x160 [ 30.725144] __split_vma+0x170/0x950 [ 30.725608] split_vma+0xc6/0x110 [ 30.726052] mprotect_fixup+0x8d2/0xb30 [ 30.726552] do_mprotect_pkey+0x87e/0xd40 [ 30.727076] __x64_sys_mprotect+0x78/0xc0 [ 30.727597] do_syscall_64+0x3f/0x90 [ 30.728073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728730] [ 30.728949] Freed by task 213: [ 30.729341] kasan_save_stack+0x22/0x50 [ 30.729841] kasan_set_track+0x25/0x30 [ 30.730333] kasan_save_free_info+0x2b/0x50 [ 30.730863] __kasan_slab_free+0x10a/0x190 [ 30.731393] kmem_cache_free+0x10d/0x4d0 [ 30.731898] rcu_core+0x8c8/0x2860 [ 30.732352] __do_softirq+0x1b7/0x7d4 [ 30.732869] [ 30.733094] Last potentially related work creation: [ 30.733678] kasan_save_stack+0x22/0x50 [ 30.734180] __kasan_record_aux_stack+0x8e/0xa0 [ 30.734752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.735399] remove_vma+0x139/0x170 [ 30.735847] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.736403] do_vmi_munmap+0x1f1/0x2b0 [ 30.736893] __vm_munmap+0x138/0x3a0 [ 30.737356] __x64_sys_munmap+0x59/0x80 [ 30.737848] do_syscall_64+0x3f/0x90 [ 30.738324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.738973] [ 30.739184] Second to last potentially related work creation: [ 30.739865] kasan_save_stack+0x22/0x50 [ 30.740360] __kasan_record_aux_stack+0x8e/0xa0 [ 30.740948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.741584] remove_vma+0x139/0x170 [ 30.742034] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.742598] do_vmi_munmap+0x1f1/0x2b0 [ 30.743082] mmap_region+0x1f9/0x2660 [ 30.743555] do_mmap+0x854/0xf00 [ 30.743986] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.744475] ksys_mmap_pgoff+0x3af/0x500 [ 30.744989] do_syscall_64+0x3f/0x90 [ 30.745463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746104] [ 30.746320] The buggy address belongs to the object at ffff888018e3dae0 [ 30.746320] which belongs to the cache vm_area_struct of size 168 [ 30.747798] The buggy address is located 88 bytes inside of [ 30.747798] freed 168-byte region [ffff888018e3dae0, ffff888018e3db88) [ 30.749204] [ 30.749416] The buggy address belongs to the physical page: [ 30.750072] page:00000000059ff34a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e3d [ 30.751166] memcg:ffff888016848e01 [ 30.751592] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.752288] page_type: 0xffffffff() [ 30.752748] raw: 0100000000000200 ffff8880087a0c80 ffffea0000674080 dead00000000000b [ 30.753664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016848e01 [ 30.754563] page dumped because: kasan: bad access detected [ 30.755226] [ 30.755444] Memory state around the buggy address: [ 30.756027] ffff888018e3da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.756892] ffff888018e3da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.757746] >ffff888018e3db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.758590] ^ [ 30.759196] ffff888018e3db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.760060] ffff888018e3dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.760931] ================================================================== [ 30.761942] Disabling lock debugging due to kernel taint [ 32.942200] BUG: Bad rss-counter state mm:0000000048d75689 type:MM_FILEPAGES val:33 [ 32.943326] BUG: Bad rss-counter state mm:0000000048d75689 type:MM_ANONPAGES val:22 [ 33.501298] BUG: Bad rss-counter state mm:000000005010c2ad type:MM_FILEPAGES val:33 [ 33.502550] BUG: Bad rss-counter state mm:000000005010c2ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8928' (ECDSA) to the list of known hosts. 2023/06/20 14:04:40 fuzzer started 2023/06/20 14:04:40 dialing manager at localhost:36067 2023/06/20 14:04:41 checking machine... 2023/06/20 14:04:41 checking revisions... [ 34.137365] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:04:41 testing simple program... [ 34.195216] cgroup: Unknown subsys name 'net' [ 34.255706] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:04:40 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007f75166e8477 RCX=ffffffff813a0add RDX=ffff888016cd0000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88801a3df7d0 R8 =0000000000000006 R9 =00007f75166e8477 R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888016cd0000 R15=0000000000092cc0 RIP=ffffffff814c086b 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 00007f75161f5900 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=00007ffe27c1d000 CR3=000000000e578000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffb333694 RBX=ffffffff85d899fc RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88806cf09990 R8 =ffffffff8608a556 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 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=00007fb199c35a60 CR3=000000000d8de000 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=4c2d8eb1d21b49bb154b5a7471a56836 XMM02=000000000011dbc0eff9b2d0a8fce9cb XMM03=000000000011dc902c67c8bc2e329bc3 XMM04=30a2b883c6a68f5100000000000ae988 XMM05=19e9129bd510f2350000000000133488 XMM06=4fda316b135da52b0000000000133310 XMM07=e042d86d42eb936e0000000000122578 XMM08=ca2f4d1af8d8597c000000000011dc90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000