syzkaller login: [ 23.753995] BUG: Bad rss-counter state mm:00000000ed3b84a2 type:MM_FILEPAGES val:33 [ 23.755741] BUG: Bad rss-counter state mm:00000000ed3b84a2 type:MM_ANONPAGES val:22 [ 23.920357] ================================================================== [ 23.921355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.922337] Read of size 8 at addr ffff88800c7aded8 by task sshd/220 [ 23.923206] [ 23.923514] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.924417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.925433] Call Trace: [ 23.925769] [ 23.926074] dump_stack_lvl+0x91/0xf0 [ 23.926638] print_report+0xcc/0x620 [ 23.927142] ? __virt_addr_valid+0x102/0x340 [ 23.927718] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.928355] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.928998] kasan_report+0xbe/0xf0 [ 23.929502] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.930147] vma_interval_tree_remove+0xc75/0xec0 [ 23.930802] vma_prepare+0xc54/0x11a0 [ 23.931308] __split_vma+0x5af/0x950 [ 23.931805] ? __pfx___split_vma+0x10/0x10 [ 23.932353] ? find_held_lock+0x2c/0x110 [ 23.932895] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.933487] ? lock_is_held_type+0x9f/0x120 [ 23.934062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.934714] ? mtree_range_walk+0x632/0x900 [ 23.935300] ? mas_walk+0x5c7/0x7c0 [ 23.935798] do_vmi_munmap+0x1f1/0x2b0 [ 23.936319] mmap_region+0x1f9/0x2660 [ 23.936844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.937386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.938135] ? __pfx_lock_acquire+0x10/0x10 [ 23.938718] ? __pfx_mmap_region+0x10/0x10 [ 23.939273] ? security_mmap_addr+0x7d/0xa0 [ 23.939826] ? get_unmapped_area+0x1f5/0x3f0 [ 23.940411] do_mmap+0x854/0xf00 [ 23.940868] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.941395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.941992] ksys_mmap_pgoff+0x3af/0x500 [ 23.942545] do_syscall_64+0x3f/0x90 [ 23.943057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.943744] RIP: 0033:0x7f6941d07d82 [ 23.944238] 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 [ 23.946502] RSP: 002b:00007ffeaca38d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.947464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6941d07d82 [ 23.948368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6941141000 [ 23.949287] RBP: 00007f6941141000 R08: 0000000000000009 R09: 0000000000001000 [ 23.950220] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a1a6f3ec0 [ 23.951142] R13: 00007ffeaca38d40 R14: 00007ffeaca38d70 R15: 00007ffeaca390d0 [ 23.952080] [ 23.952381] [ 23.952600] Allocated by task 213: [ 23.953058] kasan_save_stack+0x22/0x50 [ 23.953597] kasan_set_track+0x25/0x30 [ 23.954123] __kasan_slab_alloc+0x59/0x70 [ 23.954679] kmem_cache_alloc+0x16b/0x370 [ 23.955214] vm_area_dup+0x20/0x160 [ 23.955692] __split_vma+0x170/0x950 [ 23.956181] split_vma+0xc6/0x110 [ 23.956633] mprotect_fixup+0x8d2/0xb30 [ 23.957180] do_mprotect_pkey+0x87e/0xd40 [ 23.957750] __x64_sys_mprotect+0x78/0xc0 [ 23.958315] do_syscall_64+0x3f/0x90 [ 23.958844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.959613] [ 23.959877] Freed by task 213: [ 23.960349] kasan_save_stack+0x22/0x50 [ 23.960960] kasan_set_track+0x25/0x30 [ 23.961598] kasan_save_free_info+0x2b/0x50 [ 23.962217] __kasan_slab_free+0x10a/0x190 [ 23.962871] kmem_cache_free+0x10d/0x4d0 [ 23.963503] rcu_core+0x8c8/0x2860 [ 23.964056] __do_softirq+0x1b7/0x7d4 [ 23.964808] [ 23.965091] Last potentially related work creation: [ 23.965807] kasan_save_stack+0x22/0x50 [ 23.966487] __kasan_record_aux_stack+0x8e/0xa0 [ 23.967231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.968040] remove_vma+0x139/0x170 [ 23.968647] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.969371] do_vmi_munmap+0x1f1/0x2b0 [ 23.970001] __vm_munmap+0x138/0x3a0 [ 23.970613] __x64_sys_munmap+0x59/0x80 [ 23.971250] do_syscall_64+0x3f/0x90 [ 23.971860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.972624] [ 23.972889] The buggy address belongs to the object at ffff88800c7ade80 [ 23.972889] which belongs to the cache vm_area_struct of size 168 [ 23.974520] The buggy address is located 88 bytes inside of [ 23.974520] freed 168-byte region [ffff88800c7ade80, ffff88800c7adf28) [ 23.976162] [ 23.976402] The buggy address belongs to the physical page: [ 23.977218] page:000000008b10365b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7ad [ 23.978552] memcg:ffff88800d975001 [ 23.979063] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.979812] page_type: 0xffffffff() [ 23.980351] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6480 dead000000000008 [ 23.981398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d975001 [ 23.982474] page dumped because: kasan: bad access detected [ 23.983251] [ 23.983496] Memory state around the buggy address: [ 23.984194] ffff88800c7add80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.985233] ffff88800c7ade00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 23.986236] >ffff88800c7ade80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.987271] ^ [ 23.988110] ffff88800c7adf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 23.989121] ffff88800c7adf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.990131] ================================================================== [ 23.991288] Disabling lock debugging due to kernel taint [ 26.372974] BUG: Bad rss-counter state mm:00000000c3187e67 type:MM_FILEPAGES val:33 [ 26.374236] BUG: Bad rss-counter state mm:00000000c3187e67 type:MM_ANONPAGES val:22 [ 26.834334] BUG: Bad rss-counter state mm:000000008bf921d6 type:MM_FILEPAGES val:33 [ 26.835436] BUG: Bad rss-counter state mm:000000008bf921d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15595' (ECDSA) to the list of known hosts. 2023/06/21 05:00:30 fuzzer started 2023/06/21 05:00:30 dialing manager at localhost:36067 2023/06/21 05:00:30 checking machine... 2023/06/21 05:00:30 checking revisions... [ 27.555016] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:00:30 testing simple program... [ 27.603382] cgroup: Unknown subsys name 'net' [ 27.663001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:00:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff1100d9c1329 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ead RFL=00000212 [----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 00007f1dfbbca900 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=00007ffec0db6000 CR3=000000000e2c6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=0000000000000001 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=00007fcbecdeb8d0 CR3=000000000c69a000 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=2039323a30303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000