syzkaller login: [ 30.659086] BUG: Bad rss-counter state mm:00000000274e50ce type:MM_FILEPAGES val:33 [ 30.660484] BUG: Bad rss-counter state mm:00000000274e50ce type:MM_ANONPAGES val:22 [ 30.705956] ================================================================== [ 30.707041] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.708157] Read of size 8 at addr ffff8880195abed8 by task sshd/220 [ 30.709034] [ 30.709283] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.710399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.711500] Call Trace: [ 30.711878] <TASK> [ 30.712202] dump_stack_lvl+0x91/0xf0 [ 30.712766] print_report+0xcc/0x620 [ 30.713318] ? __virt_addr_valid+0x102/0x340 [ 30.713939] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715379] kasan_report+0xbe/0xf0 [ 30.715984] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716718] vma_interval_tree_remove+0xc75/0xec0 [ 30.717436] vma_prepare+0xc54/0x11a0 [ 30.718002] __split_vma+0x5af/0x950 [ 30.718538] ? __pfx___split_vma+0x10/0x10 [ 30.719142] ? find_held_lock+0x2c/0x110 [ 30.719752] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.720443] ? lock_is_held_type+0x9f/0x120 [ 30.721071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.721772] ? mtree_range_walk+0x632/0x900 [ 30.722417] ? mas_walk+0x5c7/0x7c0 [ 30.722955] do_vmi_munmap+0x1f1/0x2b0 [ 30.723526] mmap_region+0x1f9/0x2660 [ 30.724122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.724713] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.725537] ? __pfx_lock_acquire+0x10/0x10 [ 30.726169] ? __pfx_mmap_region+0x10/0x10 [ 30.726774] ? security_mmap_addr+0x7d/0xa0 [ 30.727377] ? get_unmapped_area+0x1f5/0x3f0 [ 30.728020] do_mmap+0x854/0xf00 [ 30.728534] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.729103] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.729748] ksys_mmap_pgoff+0x3af/0x500 [ 30.730336] do_syscall_64+0x3f/0x90 [ 30.730882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.731627] RIP: 0033:0x7f63df13bd82 [ 30.732185] 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 [ 30.734614] RSP: 002b:00007fff336914f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.735649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63df13bd82 [ 30.736629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63de575000 [ 30.737610] RBP: 00007f63de575000 R08: 0000000000000009 R09: 0000000000001000 [ 30.738596] R10: 0000000000000812 R11: 0000000000000206 R12: 000056073b0bbec0 [ 30.739582] R13: 00007fff33691510 R14: 00007fff33691540 R15: 00007fff336918a0 [ 30.740593] </TASK> [ 30.740933] [ 30.741182] Allocated by task 213: [ 30.741684] kasan_save_stack+0x22/0x50 [ 30.742272] kasan_set_track+0x25/0x30 [ 30.742843] __kasan_slab_alloc+0x59/0x70 [ 30.743447] kmem_cache_alloc+0x16b/0x370 [ 30.744051] vm_area_dup+0x20/0x160 [ 30.744582] __split_vma+0x170/0x950 [ 30.745123] split_vma+0xc6/0x110 [ 30.745634] mprotect_fixup+0x8d2/0xb30 [ 30.746219] do_mprotect_pkey+0x87e/0xd40 [ 30.746823] __x64_sys_mprotect+0x78/0xc0 [ 30.747427] do_syscall_64+0x3f/0x90 [ 30.747975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748715] [ 30.748964] Freed by task 19: [ 30.749408] kasan_save_stack+0x22/0x50 [ 30.749992] kasan_set_track+0x25/0x30 [ 30.750570] kasan_save_free_info+0x2b/0x50 [ 30.751191] __kasan_slab_free+0x10a/0x190 [ 30.751824] kmem_cache_free+0x10d/0x4d0 [ 30.752400] rcu_core+0x8c8/0x2860 [ 30.752920] __do_softirq+0x1b7/0x7d4 [ 30.753479] [ 30.753728] Last potentially related work creation: [ 30.754400] kasan_save_stack+0x22/0x50 [ 30.754985] __kasan_record_aux_stack+0x8e/0xa0 [ 30.755643] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.756388] remove_vma+0x139/0x170 [ 30.756906] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.757543] do_vmi_munmap+0x1f1/0x2b0 [ 30.758098] __vm_munmap+0x138/0x3a0 [ 30.758632] __x64_sys_munmap+0x59/0x80 [ 30.759197] do_syscall_64+0x3f/0x90 [ 30.759742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760497] [ 30.760748] The buggy address belongs to the object at ffff8880195abe80 [ 30.760748] which belongs to the cache vm_area_struct of size 168 [ 30.762437] The buggy address is located 88 bytes inside of [ 30.762437] freed 168-byte region [ffff8880195abe80, ffff8880195abf28) [ 30.764050] [ 30.764298] The buggy address belongs to the physical page: [ 30.765058] page:00000000ff228f71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x195ab [ 30.766306] memcg:ffff888016555a01 [ 30.766795] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.767535] page_type: 0xffffffff() [ 30.768058] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.769103] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016555a01 [ 30.770143] page dumped because: kasan: bad access detected [ 30.770897] [ 30.771142] Memory state around the buggy address: [ 30.771818] ffff8880195abd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.772791] ffff8880195abe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.773750] >ffff8880195abe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.774706] ^ [ 30.775515] ffff8880195abf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.776501] ffff8880195abf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.777474] ================================================================== [ 30.778659] Disabling lock debugging due to kernel taint [ 32.793259] BUG: Bad rss-counter state mm:000000005fa9d471 type:MM_FILEPAGES val:33 [ 32.794347] BUG: Bad rss-counter state mm:000000005fa9d471 type:MM_ANONPAGES val:22 [ 33.189176] BUG: Bad rss-counter state mm:00000000d3d2edcc type:MM_FILEPAGES val:33 [ 33.190539] BUG: Bad rss-counter state mm:00000000d3d2edcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4520' (ECDSA) to the list of known hosts. 2023/06/20 18:20:32 fuzzer started 2023/06/20 18:20:32 dialing manager at localhost:36067 2023/06/20 18:20:33 checking machine... 2023/06/20 18:20:33 checking revisions... [ 33.790579] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:20:33 testing simple program... [ 33.843009] cgroup: Unknown subsys name 'net' [ 33.890517] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:20:32 Registers: info registers vcpu 0 RAX=000000001371c348 RBX=ffff8880164cfd68 RCX=0000000000000000 RDX=000000001371c348 RSI=ffff8880164cfc38 RDI=ffff8880103c0000 RBP=ffff8880164cfc38 RSP=ffff8880164cf9c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880103c0000 R13=000000001371c348 R14=ffff8880090b7008 R15=dffffc0000000000 RIP=ffffffff81f358f0 RFL=00000292 [--S-A--] 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 00007f0d62a97900 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=00007f0d6304e618 CR3=00000000102a8000 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=00007ffcb0e5ab98 CR3=0000000018ea4000 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=2032333a30323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000