syzkaller login: [ 32.516498] BUG: Bad rss-counter state mm:00000000479c9f4b type:MM_FILEPAGES val:33 [ 32.517512] BUG: Bad rss-counter state mm:00000000479c9f4b type:MM_ANONPAGES val:22 [ 32.679854] ================================================================== [ 32.680800] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.681754] Read of size 8 at addr ffff888015a32798 by task sshd/219 [ 32.682532] [ 32.682890] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.683765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.684743] Call Trace: [ 32.685073] [ 32.685358] dump_stack_lvl+0x91/0xf0 [ 32.685866] print_report+0xcc/0x620 [ 32.686349] ? __virt_addr_valid+0x102/0x340 [ 32.686935] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.687567] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.688184] kasan_report+0xbe/0xf0 [ 32.688667] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.689301] vma_interval_tree_remove+0xc75/0xec0 [ 32.689901] vma_prepare+0xc54/0x11a0 [ 32.690379] __split_vma+0x5af/0x950 [ 32.690863] ? __pfx___split_vma+0x10/0x10 [ 32.691399] ? find_held_lock+0x2c/0x110 [ 32.691927] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.692488] ? lock_is_held_type+0x9f/0x120 [ 32.693026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.693636] ? mtree_range_walk+0x632/0x900 [ 32.694183] ? mas_walk+0x5c7/0x7c0 [ 32.694666] do_vmi_munmap+0x1f1/0x2b0 [ 32.695155] mmap_region+0x1f9/0x2660 [ 32.695636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.696170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.696891] ? __pfx_lock_acquire+0x10/0x10 [ 32.697438] ? __pfx_mmap_region+0x10/0x10 [ 32.697969] ? security_mmap_addr+0x7d/0xa0 [ 32.698517] ? get_unmapped_area+0x1f5/0x3f0 [ 32.699076] do_mmap+0x854/0xf00 [ 32.699519] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.700020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.700595] ksys_mmap_pgoff+0x3af/0x500 [ 32.701105] do_syscall_64+0x3f/0x90 [ 32.701589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.702256] RIP: 0033:0x7f0d98261d82 [ 32.702725] 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 [ 32.704911] RSP: 002b:00007fff1e1688d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.705817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d98261d82 [ 32.706680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d9769b000 [ 32.707534] RBP: 00007f0d9769b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.708388] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1c588cb20 [ 32.709240] R13: 00007fff1e1688f0 R14: 00007fff1e168920 R15: 00007fff1e168c80 [ 32.710096] [ 32.710397] [ 32.710614] Allocated by task 212: [ 32.711048] kasan_save_stack+0x22/0x50 [ 32.711558] kasan_set_track+0x25/0x30 [ 32.712051] __kasan_slab_alloc+0x59/0x70 [ 32.712575] kmem_cache_alloc+0x16b/0x370 [ 32.713098] vm_area_dup+0x20/0x160 [ 32.713549] __split_vma+0x170/0x950 [ 32.714017] split_vma+0xc6/0x110 [ 32.714461] mprotect_fixup+0x8d2/0xb30 [ 32.714969] do_mprotect_pkey+0x87e/0xd40 [ 32.715494] __x64_sys_mprotect+0x78/0xc0 [ 32.716015] do_syscall_64+0x3f/0x90 [ 32.716495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.717138] [ 32.717358] Freed by task 209: [ 32.717748] kasan_save_stack+0x22/0x50 [ 32.718247] kasan_set_track+0x25/0x30 [ 32.718758] kasan_save_free_info+0x2b/0x50 [ 32.719291] __kasan_slab_free+0x10a/0x190 [ 32.719859] kmem_cache_free+0x10d/0x4d0 [ 32.720396] rcu_core+0x8c8/0x2860 [ 32.720842] __do_softirq+0x1b7/0x7d4 [ 32.721342] [ 32.721562] Last potentially related work creation: [ 32.722173] kasan_save_stack+0x22/0x50 [ 32.722702] __kasan_record_aux_stack+0x8e/0xa0 [ 32.723308] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.723985] remove_vma+0x139/0x170 [ 32.724457] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.725042] do_vmi_munmap+0x1f1/0x2b0 [ 32.725537] __vm_munmap+0x138/0x3a0 [ 32.726020] __x64_sys_munmap+0x59/0x80 [ 32.726538] do_syscall_64+0x3f/0x90 [ 32.727026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.727702] [ 32.727922] The buggy address belongs to the object at ffff888015a32740 [ 32.727922] which belongs to the cache vm_area_struct of size 168 [ 32.729449] The buggy address is located 88 bytes inside of [ 32.729449] freed 168-byte region [ffff888015a32740, ffff888015a327e8) [ 32.730890] [ 32.731106] The buggy address belongs to the physical page: [ 32.731795] page:00000000149d9b1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a32 [ 32.732942] memcg:ffff8880163abb01 [ 32.733378] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.734053] page_type: 0xffffffff() [ 32.734537] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.735490] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163abb01 [ 32.736419] page dumped because: kasan: bad access detected [ 32.737100] [ 32.737324] Memory state around the buggy address: [ 32.737934] ffff888015a32680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.738834] ffff888015a32700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.739713] >ffff888015a32780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.740581] ^ [ 32.741077] ffff888015a32800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.741946] ffff888015a32880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.742827] ================================================================== [ 32.743818] Disabling lock debugging due to kernel taint [ 34.882499] BUG: Bad rss-counter state mm:00000000cab3a0df type:MM_FILEPAGES val:33 [ 34.883463] BUG: Bad rss-counter state mm:00000000cab3a0df type:MM_ANONPAGES val:22 [ 35.356585] BUG: Bad rss-counter state mm:000000001950b4cf type:MM_FILEPAGES val:33 [ 35.357972] BUG: Bad rss-counter state mm:000000001950b4cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8775' (ECDSA) to the list of known hosts. 2023/06/19 11:20:06 fuzzer started 2023/06/19 11:20:06 dialing manager at localhost:44161 2023/06/19 11:20:06 checking machine... 2023/06/19 11:20:06 checking revisions... [ 36.093684] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:20:07 testing simple program... [ 36.140903] cgroup: Unknown subsys name 'net' [ 36.203204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:20:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11001bdcfa8 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800dee7d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007fcd1ff65900 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=00007fcd2051a650 CR3=000000000edac000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fff14a3ecd8 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=00007f676a426510000055f292a51790 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