syzkaller login: [ 38.748899] BUG: Bad rss-counter state mm:0000000025784ada type:MM_FILEPAGES val:33 [ 38.750473] BUG: Bad rss-counter state mm:0000000025784ada type:MM_ANONPAGES val:22 [ 38.924514] ================================================================== [ 38.925882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.927095] Read of size 8 at addr ffff888017c3fa50 by task sshd/227 [ 38.928115] [ 38.928403] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.929520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.930788] Call Trace: [ 38.931210] [ 38.931594] dump_stack_lvl+0x91/0xf0 [ 38.932234] print_report+0xcc/0x620 [ 38.932862] ? __virt_addr_valid+0x102/0x340 [ 38.933581] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934393] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935198] kasan_report+0xbe/0xf0 [ 38.935844] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936661] vma_interval_tree_remove+0xc75/0xec0 [ 38.937464] vma_prepare+0xc54/0x11a0 [ 38.938097] __split_vma+0x5af/0x950 [ 38.938722] ? __pfx___split_vma+0x10/0x10 [ 38.939434] ? find_held_lock+0x2c/0x110 [ 38.940133] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.940890] ? lock_is_held_type+0x9f/0x120 [ 38.941610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.942420] ? mtree_range_walk+0x632/0x900 [ 38.943160] ? mas_walk+0x5c7/0x7c0 [ 38.943820] do_vmi_munmap+0x1f1/0x2b0 [ 38.944484] mmap_region+0x1f9/0x2660 [ 38.945124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.945812] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.946772] ? __pfx_lock_acquire+0x10/0x10 [ 38.947555] ? __pfx_mmap_region+0x10/0x10 [ 38.948210] ? security_mmap_addr+0x7d/0xa0 [ 38.948866] ? get_unmapped_area+0x1f5/0x3f0 [ 38.949542] do_mmap+0x854/0xf00 [ 38.950082] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.950690] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.951409] ksys_mmap_pgoff+0x3af/0x500 [ 38.952042] do_syscall_64+0x3f/0x90 [ 38.952615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953282] RIP: 0033:0x7f3caa45bd82 [ 38.953738] 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 [ 38.955992] RSP: 002b:00007fffc3747608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.956929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3caa45bd82 [ 38.957845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ca9895000 [ 38.958762] RBP: 00007f3ca9895000 R08: 0000000000000009 R09: 0000000000001000 [ 38.959641] R10: 0000000000000812 R11: 0000000000000206 R12: 000056503e7c6f70 [ 38.960481] R13: 00007fffc3747620 R14: 00007fffc3747650 R15: 00007fffc37479b0 [ 38.961332] [ 38.961660] [ 38.961877] Allocated by task 220: [ 38.962304] kasan_save_stack+0x22/0x50 [ 38.962860] kasan_set_track+0x25/0x30 [ 38.963357] __kasan_slab_alloc+0x59/0x70 [ 38.963903] kmem_cache_alloc+0x16b/0x370 [ 38.964426] vm_area_dup+0x20/0x160 [ 38.964887] __split_vma+0x170/0x950 [ 38.965373] split_vma+0xc6/0x110 [ 38.965843] mprotect_fixup+0x8d2/0xb30 [ 38.966460] do_mprotect_pkey+0x87e/0xd40 [ 38.967015] __x64_sys_mprotect+0x78/0xc0 [ 38.967548] do_syscall_64+0x3f/0x90 [ 38.968022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968677] [ 38.968892] Freed by task 220: [ 38.969284] kasan_save_stack+0x22/0x50 [ 38.969785] kasan_set_track+0x25/0x30 [ 38.970277] kasan_save_free_info+0x2b/0x50 [ 38.970850] __kasan_slab_free+0x10a/0x190 [ 38.971407] kmem_cache_free+0x10d/0x4d0 [ 38.971965] rcu_core+0x8c8/0x2860 [ 38.972429] __do_softirq+0x1b7/0x7d4 [ 38.972954] [ 38.973170] Last potentially related work creation: [ 38.973750] kasan_save_stack+0x22/0x50 [ 38.974252] __kasan_record_aux_stack+0x8e/0xa0 [ 38.974827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.975497] remove_vma+0x139/0x170 [ 38.975949] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.976525] do_vmi_munmap+0x1f1/0x2b0 [ 38.977022] __vm_munmap+0x138/0x3a0 [ 38.977503] __x64_sys_munmap+0x59/0x80 [ 38.978005] do_syscall_64+0x3f/0x90 [ 38.978490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.979155] [ 38.979377] The buggy address belongs to the object at ffff888017c3f9f8 [ 38.979377] which belongs to the cache vm_area_struct of size 168 [ 38.980875] The buggy address is located 88 bytes inside of [ 38.980875] freed 168-byte region [ffff888017c3f9f8, ffff888017c3faa0) [ 38.982311] [ 38.982543] The buggy address belongs to the physical page: [ 38.983230] page:00000000a491cc74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c3f [ 38.984361] memcg:ffff888016aa3301 [ 38.984795] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.985469] page_type: 0xffffffff() [ 38.985942] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.986885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016aa3301 [ 38.987814] page dumped because: kasan: bad access detected [ 38.988469] [ 38.988684] Memory state around the buggy address: [ 38.989260] ffff888017c3f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.990114] ffff888017c3f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.990970] >ffff888017c3fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.991832] ^ [ 38.992528] ffff888017c3fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.993380] ffff888017c3fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.994228] ================================================================== [ 38.995184] Disabling lock debugging due to kernel taint [ 40.949986] BUG: Bad rss-counter state mm:00000000a463651e type:MM_FILEPAGES val:33 [ 40.951070] BUG: Bad rss-counter state mm:00000000a463651e type:MM_ANONPAGES val:22 [ 41.520507] BUG: Bad rss-counter state mm:000000004e701754 type:MM_FILEPAGES val:33 [ 41.521805] BUG: Bad rss-counter state mm:000000004e701754 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38304' (ECDSA) to the list of known hosts. 2023/06/20 19:26:54 fuzzer started 2023/06/20 19:26:54 dialing manager at localhost:36067 2023/06/20 19:26:54 checking machine... 2023/06/20 19:26:54 checking revisions... [ 42.262281] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:26:54 testing simple program... [ 42.317644] cgroup: Unknown subsys name 'net' [ 42.389066] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:26:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8118ddc2 RDX=00000000000018dd RSI=00000000000018dd RDI=ffffffff864efd64 RBP=ffff8880147c7a08 RSP=ffff8880147c7940 R8 =0000000000000000 R9 =ffff8880147c79f0 R10=0000000000038001 R11=00000000000b5d59 R12=ffff8880147c7a10 R13=ffff8880147c79f8 R14=ffff8880147c79f1 R15=ffff8880147c79b0 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f30f3ade900 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=00007f30f4093650 CR3=000000001ccb2000 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=1ffff11001b8ebd4 RBX=ffffea0001b78b40 RCX=0000000000000000 RDX=ffff88800c769b40 RSI=ffffffff8170bb90 RDI=ffff88800dc75ea0 RBP=0000000000000020 RSP=ffff888010267948 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000020 R11=0000000000000000 R12=0000000000000000 R13=00007fc03ca3d000 R14=ffff88800ef0c1e0 R15=dffffc0000000000 RIP=ffffffff8170bba0 RFL=00000216 [----AP-] 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=000055559991f040 CR3=000000000e9cc000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=5f65676e61686378655f78656b203a72 XMM04=000000300000002800007fc03c77eb6b XMM05=000000000000000200007ffc5f963110 XMM06=00000000000000008000000000000006 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=f1ae70f3b593b355508c0132662801da XMM11=f6b565626617696be7722f5ac2ba5a70 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000