syzkaller login: [ 38.899886] BUG: Bad rss-counter state mm:00000000c441eb9d type:MM_FILEPAGES val:33 [ 38.900908] BUG: Bad rss-counter state mm:00000000c441eb9d type:MM_ANONPAGES val:22 [ 39.012217] ================================================================== [ 39.013026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.013546] Read of size 8 at addr ffff888016f0ded8 by task sshd/220 [ 39.013968] [ 39.014093] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.014652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.015198] Call Trace: [ 39.015377] [ 39.015536] dump_stack_lvl+0x91/0xf0 [ 39.015815] print_report+0xcc/0x620 [ 39.016081] ? __virt_addr_valid+0x102/0x340 [ 39.016397] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.016763] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017101] kasan_report+0xbe/0xf0 [ 39.017363] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017705] vma_interval_tree_remove+0xc75/0xec0 [ 39.018041] vma_prepare+0xc54/0x11a0 [ 39.018307] __split_vma+0x5af/0x950 [ 39.018566] ? __pfx___split_vma+0x10/0x10 [ 39.018865] ? find_held_lock+0x2c/0x110 [ 39.019159] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.019472] ? lock_is_held_type+0x9f/0x120 [ 39.019772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.020105] ? mtree_range_walk+0x632/0x900 [ 39.020421] ? mas_walk+0x5c7/0x7c0 [ 39.020679] do_vmi_munmap+0x1f1/0x2b0 [ 39.020952] mmap_region+0x1f9/0x2660 [ 39.021218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.021505] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.021906] ? __pfx_lock_acquire+0x10/0x10 [ 39.022211] ? __pfx_mmap_region+0x10/0x10 [ 39.022503] ? security_mmap_addr+0x7d/0xa0 [ 39.022795] ? get_unmapped_area+0x1f5/0x3f0 [ 39.023100] do_mmap+0x854/0xf00 [ 39.023346] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.023625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.023940] ksys_mmap_pgoff+0x3af/0x500 [ 39.024238] do_syscall_64+0x3f/0x90 [ 39.024508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.024875] RIP: 0033:0x7ffb9834fd82 [ 39.025132] 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 [ 39.026322] RSP: 002b:00007ffc1ca1cf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.026830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb9834fd82 [ 39.027306] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb97789000 [ 39.027789] RBP: 00007ffb97789000 R08: 0000000000000009 R09: 0000000000001000 [ 39.028274] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0ee003980 [ 39.028749] R13: 00007ffc1ca1cfa0 R14: 00007ffc1ca1cfd0 R15: 00007ffc1ca1d330 [ 39.029223] [ 39.029386] [ 39.029505] Allocated by task 213: [ 39.029743] kasan_save_stack+0x22/0x50 [ 39.030017] kasan_set_track+0x25/0x30 [ 39.030294] __kasan_slab_alloc+0x59/0x70 [ 39.030585] kmem_cache_alloc+0x16b/0x370 [ 39.030874] vm_area_dup+0x20/0x160 [ 39.031129] __split_vma+0x170/0x950 [ 39.031386] split_vma+0xc6/0x110 [ 39.031632] mprotect_fixup+0x8d2/0xb30 [ 39.031923] do_mprotect_pkey+0x87e/0xd40 [ 39.032224] __x64_sys_mprotect+0x78/0xc0 [ 39.032515] do_syscall_64+0x3f/0x90 [ 39.032778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033131] [ 39.033250] Freed by task 213: [ 39.033471] kasan_save_stack+0x22/0x50 [ 39.033752] kasan_set_track+0x25/0x30 [ 39.034021] kasan_save_free_info+0x2b/0x50 [ 39.034320] __kasan_slab_free+0x10a/0x190 [ 39.034616] kmem_cache_free+0x10d/0x4d0 [ 39.034906] rcu_core+0x8c8/0x2860 [ 39.035155] __do_softirq+0x1b7/0x7d4 [ 39.035416] [ 39.035535] Last potentially related work creation: [ 39.035862] kasan_save_stack+0x22/0x50 [ 39.036175] __kasan_record_aux_stack+0x8e/0xa0 [ 39.036494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.036860] remove_vma+0x139/0x170 [ 39.037109] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.037415] do_vmi_munmap+0x1f1/0x2b0 [ 39.037688] __vm_munmap+0x138/0x3a0 [ 39.037949] __x64_sys_munmap+0x59/0x80 [ 39.038225] do_syscall_64+0x3f/0x90 [ 39.038485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038844] [ 39.038966] The buggy address belongs to the object at ffff888016f0de80 [ 39.038966] which belongs to the cache vm_area_struct of size 168 [ 39.039786] The buggy address is located 88 bytes inside of [ 39.039786] freed 168-byte region [ffff888016f0de80, ffff888016f0df28) [ 39.040588] [ 39.040714] The buggy address belongs to the physical page: [ 39.041086] page:00000000710bf21d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f0d [ 39.041696] memcg:ffff88800d56e901 [ 39.041934] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.042321] page_type: 0xffffffff() [ 39.042594] raw: 0100000000000200 ffff88800879fc80 ffffea0000639b80 dead000000000004 [ 39.043128] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d56e901 [ 39.043675] page dumped because: kasan: bad access detected [ 39.044057] [ 39.044194] Memory state around the buggy address: [ 39.044546] ffff888016f0dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.045049] ffff888016f0de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.045552] >ffff888016f0de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.046056] ^ [ 39.046499] ffff888016f0df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.047010] ffff888016f0df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.047521] ================================================================== [ 39.048092] Disabling lock debugging due to kernel taint [ 40.823614] BUG: Bad rss-counter state mm:00000000fe9bf7c1 type:MM_FILEPAGES val:33 [ 40.824383] BUG: Bad rss-counter state mm:00000000fe9bf7c1 type:MM_ANONPAGES val:22 [ 41.266773] BUG: Bad rss-counter state mm:000000000d3197a8 type:MM_FILEPAGES val:33 [ 41.267556] BUG: Bad rss-counter state mm:000000000d3197a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22439' (ECDSA) to the list of known hosts. 2023/06/19 16:32:57 fuzzer started 2023/06/19 16:32:57 dialing manager at localhost:44161 2023/06/19 16:32:57 checking machine... 2023/06/19 16:32:57 checking revisions... [ 42.007697] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:32:57 testing simple program... [ 42.063957] cgroup: Unknown subsys name 'net' [ 42.135172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:32:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f019178 RCX=ffffffff812e00e5 RDX=1ffff11001e0322f RSI=ffffffff87b86f80 RDI=ffff88800ebf7b00 RBP=ffff88800d11b000 RSP=ffff888008d7fcc8 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=0000000000000283 R13=ffff88800ebf7af8 R14=ffffffff818d9dc6 R15=ffff88800dd93100 RIP=ffffffff84513679 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 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=00007f1d472ed618 CR3=000000000da26000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb834b3cad0 CR3=0000000019f9a000 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=2037353a32333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000