syzkaller login: [ 38.850913] BUG: Bad rss-counter state mm:0000000084c48440 type:MM_FILEPAGES val:33 [ 38.852115] BUG: Bad rss-counter state mm:0000000084c48440 type:MM_ANONPAGES val:22 [ 38.897514] ================================================================== [ 38.898608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.899642] Read of size 8 at addr ffff88800ecb83f8 by task sshd/220 [ 38.900484] [ 38.900718] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.901664] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.902726] Call Trace: [ 38.903074] [ 38.903385] dump_stack_lvl+0x91/0xf0 [ 38.903909] print_report+0xcc/0x620 [ 38.904439] ? __virt_addr_valid+0x102/0x340 [ 38.905026] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.905691] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906368] kasan_report+0xbe/0xf0 [ 38.906917] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907608] vma_interval_tree_remove+0xc75/0xec0 [ 38.908265] vma_prepare+0xc54/0x11a0 [ 38.908794] __split_vma+0x5af/0x950 [ 38.909326] ? __pfx___split_vma+0x10/0x10 [ 38.909912] ? find_held_lock+0x2c/0x110 [ 38.910498] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.911128] ? lock_is_held_type+0x9f/0x120 [ 38.911715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.912391] ? mtree_range_walk+0x632/0x900 [ 38.913003] ? mas_walk+0x5c7/0x7c0 [ 38.913528] do_vmi_munmap+0x1f1/0x2b0 [ 38.914070] mmap_region+0x1f9/0x2660 [ 38.914594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.915159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.915950] ? __pfx_lock_acquire+0x10/0x10 [ 38.916530] ? __pfx_mmap_region+0x10/0x10 [ 38.917116] ? security_mmap_addr+0x7d/0xa0 [ 38.917700] ? get_unmapped_area+0x1f5/0x3f0 [ 38.918310] do_mmap+0x854/0xf00 [ 38.918805] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.919378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.920025] ksys_mmap_pgoff+0x3af/0x500 [ 38.920604] do_syscall_64+0x3f/0x90 [ 38.921159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921945] RIP: 0033:0x7f70afdb1d82 [ 38.922484] 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 [ 38.924901] RSP: 002b:00007ffda5b0b078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.925934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70afdb1d82 [ 38.926933] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70af1eb000 [ 38.927904] RBP: 00007f70af1eb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.928877] R10: 0000000000000812 R11: 0000000000000206 R12: 000055847e0d0ec0 [ 38.929858] R13: 00007ffda5b0b090 R14: 00007ffda5b0b0c0 R15: 00007ffda5b0b420 [ 38.930846] [ 38.931184] [ 38.931436] Allocated by task 213: [ 38.931926] kasan_save_stack+0x22/0x50 [ 38.932506] kasan_set_track+0x25/0x30 [ 38.933078] __kasan_slab_alloc+0x59/0x70 [ 38.933686] kmem_cache_alloc+0x16b/0x370 [ 38.934284] vm_area_dup+0x20/0x160 [ 38.934808] __split_vma+0x170/0x950 [ 38.935340] split_vma+0xc6/0x110 [ 38.935850] mprotect_fixup+0x8d2/0xb30 [ 38.936426] do_mprotect_pkey+0x87e/0xd40 [ 38.937030] __x64_sys_mprotect+0x78/0xc0 [ 38.937632] do_syscall_64+0x3f/0x90 [ 38.938178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938935] [ 38.939185] Freed by task 213: [ 38.939638] kasan_save_stack+0x22/0x50 [ 38.940210] kasan_set_track+0x25/0x30 [ 38.940779] kasan_save_free_info+0x2b/0x50 [ 38.941390] __kasan_slab_free+0x10a/0x190 [ 38.941994] kmem_cache_free+0x10d/0x4d0 [ 38.942579] rcu_core+0x8c8/0x2860 [ 38.943081] __do_softirq+0x1b7/0x7d4 [ 38.943619] [ 38.943862] Last potentially related work creation: [ 38.944525] kasan_save_stack+0x22/0x50 [ 38.945103] __kasan_record_aux_stack+0x8e/0xa0 [ 38.945748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.946490] remove_vma+0x139/0x170 [ 38.947003] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.947632] do_vmi_munmap+0x1f1/0x2b0 [ 38.948180] __vm_munmap+0x138/0x3a0 [ 38.948706] __x64_sys_munmap+0x59/0x80 [ 38.949267] do_syscall_64+0x3f/0x90 [ 38.949810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.950549] [ 38.950791] The buggy address belongs to the object at ffff88800ecb83a0 [ 38.950791] which belongs to the cache vm_area_struct of size 168 [ 38.952440] The buggy address is located 88 bytes inside of [ 38.952440] freed 168-byte region [ffff88800ecb83a0, ffff88800ecb8448) [ 38.954043] [ 38.954284] The buggy address belongs to the physical page: [ 38.955036] page:00000000b00043cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecb8 [ 38.956259] memcg:ffff88800e74e701 [ 38.956745] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.957538] page_type: 0xffffffff() [ 38.958040] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389500 dead000000000005 [ 38.959088] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e74e701 [ 38.960102] page dumped because: kasan: bad access detected [ 38.960843] [ 38.961086] Memory state around the buggy address: [ 38.961743] ffff88800ecb8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.962734] ffff88800ecb8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.963697] >ffff88800ecb8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.964646] ^ [ 38.965590] ffff88800ecb8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.966551] ffff88800ecb8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.967506] ================================================================== [ 38.968929] Disabling lock debugging due to kernel taint [ 40.816188] BUG: Bad rss-counter state mm:0000000065e70564 type:MM_FILEPAGES val:33 [ 40.816884] BUG: Bad rss-counter state mm:0000000065e70564 type:MM_ANONPAGES val:22 [ 41.345223] BUG: Bad rss-counter state mm:00000000e939fb57 type:MM_FILEPAGES val:33 [ 41.346405] BUG: Bad rss-counter state mm:00000000e939fb57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32090' (ECDSA) to the list of known hosts. 2023/06/21 07:49:28 fuzzer started 2023/06/21 07:49:29 dialing manager at localhost:36067 2023/06/21 07:49:29 checking machine... 2023/06/21 07:49:29 checking revisions... [ 42.141425] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:49:29 testing simple program... [ 42.190612] cgroup: Unknown subsys name 'net' [ 42.229735] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:49:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001255 RCX=ffffffff8171ada4 RDX=ffff888016f7b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800e4d9740 RSP=ffff88800fe37e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=0000000000000001 R13=00007f5959873618 R14=ffff88800e4d9750 R15=0000000000000040 RIP=ffffffff814c0860 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f59592bc900 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=00007f5959873618 CR3=000000000c916000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fdce155ed70 CR3=000000000cae0000 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=1be0bcbc53541faf9a4c7433c8a70677 XMM02=000000000011be30ec2efd57dc4c00df XMM03=0000000000122058a61428fe029b3481 XMM04=32b23dc837ee469500000000000ae988 XMM05=19e9129bd510f2350000000000131c88 XMM06=4fda316b135da52b0000000000131b10 XMM07=e042d86d42eb936e0000000000122330 XMM08=a61428fe029b3481000000000011be90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000