syzkaller login: [ 31.489635] BUG: Bad rss-counter state mm:0000000079a59a28 type:MM_FILEPAGES val:33 [ 31.491112] BUG: Bad rss-counter state mm:0000000079a59a28 type:MM_ANONPAGES val:22 [ 31.625420] ================================================================== [ 31.626323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.627254] Read of size 8 at addr ffff888019b3e058 by task sshd/219 [ 31.628027] [ 31.628240] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.629242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.630210] Call Trace: [ 31.630526] [ 31.630831] dump_stack_lvl+0x91/0xf0 [ 31.631321] print_report+0xcc/0x620 [ 31.631812] ? __virt_addr_valid+0x102/0x340 [ 31.632364] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632973] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633583] kasan_report+0xbe/0xf0 [ 31.634051] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.634667] vma_interval_tree_remove+0xc75/0xec0 [ 31.635261] vma_prepare+0xc54/0x11a0 [ 31.635736] __split_vma+0x5af/0x950 [ 31.636209] ? __pfx___split_vma+0x10/0x10 [ 31.636728] ? find_held_lock+0x2c/0x110 [ 31.637255] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.637817] ? lock_is_held_type+0x9f/0x120 [ 31.638344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.638947] ? mtree_range_walk+0x632/0x900 [ 31.639499] ? mas_walk+0x5c7/0x7c0 [ 31.639989] do_vmi_munmap+0x1f1/0x2b0 [ 31.640488] mmap_region+0x1f9/0x2660 [ 31.640967] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.641478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.642186] ? __pfx_lock_acquire+0x10/0x10 [ 31.642715] ? __pfx_mmap_region+0x10/0x10 [ 31.643236] ? security_mmap_addr+0x7d/0xa0 [ 31.643765] ? get_unmapped_area+0x1f5/0x3f0 [ 31.644319] do_mmap+0x854/0xf00 [ 31.644750] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.645241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.645795] ksys_mmap_pgoff+0x3af/0x500 [ 31.646298] do_syscall_64+0x3f/0x90 [ 31.646774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647422] RIP: 0033:0x7f47a9e2bd82 [ 31.647877] 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 [ 31.650014] RSP: 002b:00007fffd955f1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.650918] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47a9e2bd82 [ 31.651770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47a9265000 [ 31.652629] RBP: 00007f47a9265000 R08: 0000000000000009 R09: 0000000000001000 [ 31.653467] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c075acd90 [ 31.654303] R13: 00007fffd955f210 R14: 00007fffd955f240 R15: 00007fffd955f5a0 [ 31.655154] [ 31.655443] [ 31.655655] Allocated by task 212: [ 31.656090] kasan_save_stack+0x22/0x50 [ 31.656594] kasan_set_track+0x25/0x30 [ 31.657083] __kasan_slab_alloc+0x59/0x70 [ 31.657609] kmem_cache_alloc+0x16b/0x370 [ 31.658118] vm_area_dup+0x20/0x160 [ 31.658568] __split_vma+0x170/0x950 [ 31.659030] split_vma+0xc6/0x110 [ 31.659474] mprotect_fixup+0x8d2/0xb30 [ 31.659986] do_mprotect_pkey+0x87e/0xd40 [ 31.660498] __x64_sys_mprotect+0x78/0xc0 [ 31.661018] do_syscall_64+0x3f/0x90 [ 31.661490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.662122] [ 31.662334] Freed by task 212: [ 31.662726] kasan_save_stack+0x22/0x50 [ 31.663234] kasan_set_track+0x25/0x30 [ 31.663727] kasan_save_free_info+0x2b/0x50 [ 31.664258] __kasan_slab_free+0x10a/0x190 [ 31.664785] kmem_cache_free+0x10d/0x4d0 [ 31.665284] rcu_core+0x8c8/0x2860 [ 31.665723] __do_softirq+0x1b7/0x7d4 [ 31.666194] [ 31.666407] Last potentially related work creation: [ 31.666991] kasan_save_stack+0x22/0x50 [ 31.667486] __kasan_record_aux_stack+0x8e/0xa0 [ 31.668068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.668705] remove_vma+0x139/0x170 [ 31.669148] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.669703] do_vmi_munmap+0x1f1/0x2b0 [ 31.670183] __vm_munmap+0x138/0x3a0 [ 31.670648] __x64_sys_munmap+0x59/0x80 [ 31.671144] do_syscall_64+0x3f/0x90 [ 31.671620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672261] [ 31.672474] The buggy address belongs to the object at ffff888019b3e000 [ 31.672474] which belongs to the cache vm_area_struct of size 168 [ 31.673915] The buggy address is located 88 bytes inside of [ 31.673915] freed 168-byte region [ffff888019b3e000, ffff888019b3e0a8) [ 31.675293] [ 31.675507] The buggy address belongs to the physical page: [ 31.676187] page:00000000eb89079c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b3e [ 31.677277] memcg:ffff888019b34301 [ 31.677698] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.678339] page_type: 0xffffffff() [ 31.678786] raw: 0100000000000200 ffff8880087a0c80 ffffea000066ce00 000000000000000c [ 31.679691] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b34301 [ 31.680601] page dumped because: kasan: bad access detected [ 31.681261] [ 31.681474] Memory state around the buggy address: [ 31.682052] ffff888019b3df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.682901] ffff888019b3df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.683751] >ffff888019b3e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.684600] ^ [ 31.685323] ffff888019b3e080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.686184] ffff888019b3e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.687033] ================================================================== [ 31.688080] Disabling lock debugging due to kernel taint [ 34.307226] BUG: Bad rss-counter state mm:000000002539af76 type:MM_FILEPAGES val:33 [ 34.308277] BUG: Bad rss-counter state mm:000000002539af76 type:MM_ANONPAGES val:22 [ 34.805615] BUG: Bad rss-counter state mm:0000000050cc382e type:MM_FILEPAGES val:33 [ 34.806695] BUG: Bad rss-counter state mm:0000000050cc382e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18034' (ECDSA) to the list of known hosts. 2023/06/21 03:39:40 fuzzer started 2023/06/21 03:39:40 dialing manager at localhost:36067 2023/06/21 03:39:40 checking machine... 2023/06/21 03:39:40 checking revisions... [ 35.493675] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:39:40 testing simple program... [ 35.542517] cgroup: Unknown subsys name 'net' [ 35.582537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:39:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001b49ea5 RSP=ffff88800da4f508 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806ce361a0 R13=ffffffff818284fc R14=0000000000000040 R15=ffff88801455a000 RIP=ffffffff8135b960 RFL=00000016 [----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 00007f26c58de900 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=00007f3eb95bb650 CR3=000000000e226000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=2167cc843b54f4d600000000000ae988 XMM05=0f97a78c073a4acb0000000000134318 XMM06=dfcdbad4f1609c3700000000001331d0 XMM07=fb795ef6d65770560000000000123358 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd905f7cf8 CR3=000000000dad8000 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=39333a3330203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000