syzkaller login: [ 38.781731] BUG: Bad rss-counter state mm:0000000033ec6fa3 type:MM_FILEPAGES val:33 [ 38.782849] BUG: Bad rss-counter state mm:0000000033ec6fa3 type:MM_ANONPAGES val:22 [ 38.940318] ================================================================== [ 38.941194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.942175] Read of size 8 at addr ffff88800dcc2880 by task sshd/219 [ 38.942940] [ 38.943154] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.943987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.944930] Call Trace: [ 38.945242] [ 38.945524] dump_stack_lvl+0x91/0xf0 [ 38.945997] print_report+0xcc/0x620 [ 38.946468] ? __virt_addr_valid+0x102/0x340 [ 38.947026] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947623] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948216] kasan_report+0xbe/0xf0 [ 38.948679] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949284] vma_interval_tree_remove+0xc75/0xec0 [ 38.949863] vma_prepare+0xc54/0x11a0 [ 38.950326] __split_vma+0x5af/0x950 [ 38.950790] ? __pfx___split_vma+0x10/0x10 [ 38.951305] ? find_held_lock+0x2c/0x110 [ 38.951809] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.952357] ? lock_is_held_type+0x9f/0x120 [ 38.952883] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.953474] ? mtree_range_walk+0x632/0x900 [ 38.954013] ? mas_walk+0x5c7/0x7c0 [ 38.954474] do_vmi_munmap+0x1f1/0x2b0 [ 38.954966] mmap_region+0x1f9/0x2660 [ 38.955433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.955930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.956628] ? __pfx_lock_acquire+0x10/0x10 [ 38.957147] ? __pfx_mmap_region+0x10/0x10 [ 38.957670] ? security_mmap_addr+0x7d/0xa0 [ 38.958187] ? get_unmapped_area+0x1f5/0x3f0 [ 38.958734] do_mmap+0x854/0xf00 [ 38.959164] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.959643] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.960195] ksys_mmap_pgoff+0x3af/0x500 [ 38.960690] do_syscall_64+0x3f/0x90 [ 38.961151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961781] RIP: 0033:0x7f33684d1d82 [ 38.962223] 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 [ 38.964323] RSP: 002b:00007fff195649a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.965232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33684d1d82 [ 38.966090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f336790b000 [ 38.966960] RBP: 00007f336790b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.967804] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c921432ec0 [ 38.968651] R13: 00007fff195649c0 R14: 00007fff195649f0 R15: 00007fff19564d50 [ 38.969499] [ 38.969799] [ 38.970017] Allocated by task 212: [ 38.970440] kasan_save_stack+0x22/0x50 [ 38.970951] kasan_set_track+0x25/0x30 [ 38.971446] __kasan_slab_alloc+0x59/0x70 [ 38.971967] kmem_cache_alloc+0x16b/0x370 [ 38.972488] vm_area_dup+0x20/0x160 [ 38.972941] __split_vma+0x170/0x950 [ 38.973404] split_vma+0xc6/0x110 [ 38.973838] mprotect_fixup+0x8d2/0xb30 [ 38.974334] do_mprotect_pkey+0x87e/0xd40 [ 38.974864] __x64_sys_mprotect+0x78/0xc0 [ 38.975393] do_syscall_64+0x3f/0x90 [ 38.975863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976508] [ 38.976721] Freed by task 212: [ 38.977110] kasan_save_stack+0x22/0x50 [ 38.977615] kasan_set_track+0x25/0x30 [ 38.978111] kasan_save_free_info+0x2b/0x50 [ 38.978657] __kasan_slab_free+0x10a/0x190 [ 38.979186] kmem_cache_free+0x10d/0x4d0 [ 38.979691] rcu_core+0x8c8/0x2860 [ 38.980136] __do_softirq+0x1b7/0x7d4 [ 38.980620] [ 38.980839] Last potentially related work creation: [ 38.981433] kasan_save_stack+0x22/0x50 [ 38.981943] __kasan_record_aux_stack+0x8e/0xa0 [ 38.982527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.983171] remove_vma+0x139/0x170 [ 38.983620] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.984180] do_vmi_munmap+0x1f1/0x2b0 [ 38.984658] __vm_munmap+0x138/0x3a0 [ 38.985136] __x64_sys_munmap+0x59/0x80 [ 38.985640] do_syscall_64+0x3f/0x90 [ 38.986256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986947] [ 38.987168] The buggy address belongs to the object at ffff88800dcc2828 [ 38.987168] which belongs to the cache vm_area_struct of size 168 [ 38.988700] The buggy address is located 88 bytes inside of [ 38.988700] freed 168-byte region [ffff88800dcc2828, ffff88800dcc28d0) [ 38.990169] [ 38.990387] The buggy address belongs to the physical page: [ 38.991070] page:00000000b51c2b29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcc2 [ 38.992203] memcg:ffff88800d410e01 [ 38.992643] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.993357] page_type: 0xffffffff() [ 38.993817] raw: 0100000000000200 ffff8880087a0c80 ffffea0000373000 dead000000000003 [ 38.994800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d410e01 [ 38.995727] page dumped because: kasan: bad access detected [ 38.996389] [ 38.996608] Memory state around the buggy address: [ 38.997192] ffff88800dcc2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.998062] ffff88800dcc2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.998982] >ffff88800dcc2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.999889] ^ [ 39.000323] ffff88800dcc2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.001204] ffff88800dcc2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.002102] ================================================================== [ 39.003106] Disabling lock debugging due to kernel taint [ 41.630282] BUG: Bad rss-counter state mm:000000000872be91 type:MM_FILEPAGES val:33 [ 41.631362] BUG: Bad rss-counter state mm:000000000872be91 type:MM_ANONPAGES val:22 [ 42.130781] BUG: Bad rss-counter state mm:00000000efc56d66 type:MM_FILEPAGES val:33 [ 42.131776] BUG: Bad rss-counter state mm:00000000efc56d66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54911' (ECDSA) to the list of known hosts. 2023/06/20 13:41:45 fuzzer started 2023/06/20 13:41:45 dialing manager at localhost:36067 2023/06/20 13:41:45 checking machine... 2023/06/20 13:41:45 checking revisions... [ 42.919126] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:41:45 testing simple program... [ 42.968780] cgroup: Unknown subsys name 'net' [ 43.011785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:41:45 Registers: info registers vcpu 0 RAX=ffffed100307bfd3 RBX=ffffed100307bfd4 RCX=ffffffff811fc4a4 RDX=0000000000000001 RSI=0000000000000008 RDI=ffff8880183dfe98 RBP=ffffed100307bfd3 RSP=ffff8880183dfe38 R8 =0000000000000001 R9 =ffffed100307bfd3 R10=ffff8880183dfe9f R11=00000000000b6a61 R12=ffff888010293ef8 R13=ffff888010293680 R14=0000000000000000 R15=ffff88800e376500 RIP=ffffffff8180f0a8 RFL=00000283 [--S---C] 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 00007f48db4a1900 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=00007efd17604000 CR3=000000000c9b2000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffcd64b0ee8 CR3=0000000005482000 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=00007f3a81fd75100000560eb1ef8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000