syzkaller login: [ 30.521681] BUG: Bad rss-counter state mm:00000000b845b779 type:MM_FILEPAGES val:33 [ 30.522731] BUG: Bad rss-counter state mm:00000000b845b779 type:MM_ANONPAGES val:22 [ 30.698106] ================================================================== [ 30.699184] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.700201] Read of size 8 at addr ffff888015e694e0 by task sshd/222 [ 30.701035] [ 30.701320] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.702277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.703338] Call Trace: [ 30.703705] [ 30.704029] dump_stack_lvl+0x91/0xf0 [ 30.704561] print_report+0xcc/0x620 [ 30.705075] ? __virt_addr_valid+0x102/0x340 [ 30.705660] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706317] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707006] kasan_report+0xbe/0xf0 [ 30.707536] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708221] vma_interval_tree_remove+0xc75/0xec0 [ 30.708953] vma_prepare+0xc54/0x11a0 [ 30.709626] __split_vma+0x5af/0x950 [ 30.710208] ? __pfx___split_vma+0x10/0x10 [ 30.710788] ? find_held_lock+0x2c/0x110 [ 30.711368] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.712127] ? lock_is_held_type+0x9f/0x120 [ 30.712767] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.713445] ? mtree_range_walk+0x632/0x900 [ 30.714154] ? mas_walk+0x5c7/0x7c0 [ 30.714692] do_vmi_munmap+0x1f1/0x2b0 [ 30.715275] mmap_region+0x1f9/0x2660 [ 30.715920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.716512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.717291] ? __pfx_lock_acquire+0x10/0x10 [ 30.717907] ? __pfx_mmap_region+0x10/0x10 [ 30.718499] ? security_mmap_addr+0x7d/0xa0 [ 30.719158] ? get_unmapped_area+0x1f5/0x3f0 [ 30.719758] do_mmap+0x854/0xf00 [ 30.720278] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.720835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.721472] ksys_mmap_pgoff+0x3af/0x500 [ 30.722056] do_syscall_64+0x3f/0x90 [ 30.722583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.723307] RIP: 0033:0x7fcef0648d82 [ 30.723822] 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 [ 30.726251] RSP: 002b:00007ffdb02ff318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.727319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcef0648d82 [ 30.728273] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fceefa82000 [ 30.729198] RBP: 00007fceefa82000 R08: 0000000000000009 R09: 0000000000001000 [ 30.730154] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e4872ab20 [ 30.731087] R13: 00007ffdb02ff330 R14: 00007ffdb02ff360 R15: 00007ffdb02ff6c0 [ 30.732084] [ 30.732415] [ 30.732651] Allocated by task 215: [ 30.733150] kasan_save_stack+0x22/0x50 [ 30.733702] kasan_set_track+0x25/0x30 [ 30.734244] __kasan_slab_alloc+0x59/0x70 [ 30.734813] kmem_cache_alloc+0x16b/0x370 [ 30.735378] vm_area_dup+0x20/0x160 [ 30.735907] __split_vma+0x170/0x950 [ 30.736469] split_vma+0xc6/0x110 [ 30.736962] mprotect_fixup+0x8d2/0xb30 [ 30.737509] do_mprotect_pkey+0x87e/0xd40 [ 30.738078] __x64_sys_mprotect+0x78/0xc0 [ 30.738652] do_syscall_64+0x3f/0x90 [ 30.739269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.740182] [ 30.740462] Freed by task 19: [ 30.740889] kasan_save_stack+0x22/0x50 [ 30.741440] kasan_set_track+0x25/0x30 [ 30.741985] kasan_save_free_info+0x2b/0x50 [ 30.742596] __kasan_slab_free+0x10a/0x190 [ 30.743182] kmem_cache_free+0x10d/0x4d0 [ 30.743745] rcu_core+0x8c8/0x2860 [ 30.744264] __do_softirq+0x1b7/0x7d4 [ 30.744777] [ 30.745034] Last potentially related work creation: [ 30.745667] kasan_save_stack+0x22/0x50 [ 30.746211] __kasan_record_aux_stack+0x8e/0xa0 [ 30.746834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.747524] remove_vma+0x139/0x170 [ 30.748057] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.748665] do_vmi_munmap+0x1f1/0x2b0 [ 30.749237] __vm_munmap+0x138/0x3a0 [ 30.749751] __x64_sys_munmap+0x59/0x80 [ 30.750325] do_syscall_64+0x3f/0x90 [ 30.750867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.751565] [ 30.751800] The buggy address belongs to the object at ffff888015e69488 [ 30.751800] which belongs to the cache vm_area_struct of size 168 [ 30.753395] The buggy address is located 88 bytes inside of [ 30.753395] freed 168-byte region [ffff888015e69488, ffff888015e69530) [ 30.754951] [ 30.755190] The buggy address belongs to the physical page: [ 30.755922] page:0000000004a974e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e69 [ 30.757159] memcg:ffff8880167ca201 [ 30.757634] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.758353] page_type: 0xffffffff() [ 30.758854] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.759875] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167ca201 [ 30.760881] page dumped because: kasan: bad access detected [ 30.761616] [ 30.761855] Memory state around the buggy address: [ 30.762493] ffff888015e69380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.763445] ffff888015e69400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.764389] >ffff888015e69480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.765336] ^ [ 30.766173] ffff888015e69500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.767121] ffff888015e69580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.768083] ================================================================== [ 30.769231] Disabling lock debugging due to kernel taint [ 32.751534] BUG: Bad rss-counter state mm:000000009c611e9f type:MM_FILEPAGES val:33 [ 32.752789] BUG: Bad rss-counter state mm:000000009c611e9f type:MM_ANONPAGES val:22 [ 33.238514] BUG: Bad rss-counter state mm:000000000c2efe1a type:MM_FILEPAGES val:33 [ 33.239685] BUG: Bad rss-counter state mm:000000000c2efe1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51800' (ECDSA) to the list of known hosts. 2023/06/20 21:04:04 fuzzer started 2023/06/20 21:04:05 dialing manager at localhost:36067 2023/06/20 21:04:05 checking machine... 2023/06/20 21:04:05 checking revisions... [ 34.010949] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:04:05 testing simple program... [ 34.052581] cgroup: Unknown subsys name 'net' [ 34.106948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:04:04 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888006827b68 RCX=ffffffff818bebc3 RDX=ffffed1000d04f72 RSI=0000000000000004 RDI=ffff888006827b88 RBP=ffff888006827b88 RSP=ffff888006827928 R8 =0000000000000001 R9 =ffffed1000d04f71 R10=ffff888006827b8b R11=0000000000000000 R12=00000000fffffffc R13=ffff888015d73680 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff818bebc8 RFL=00000246 [---Z-P-] 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 00007f341be23700 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=00007f751ca6e618 CR3=000000000d796000 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=25252525252525252525252525252525 XMM01=00000000000000ffffffffffff00ff00 XMM02=0000000000000000ffffffffff000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=1ffff110011b4f8f RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888008da7c68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85616758 R15=0000000000000000 RIP=ffffffff812d8f5c RFL=00000046 [---Z-P-] 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=00007fa4f151f3f0 CR3=000000000c51c000 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=826413255cffc0909046c46c6a3d0a93 XMM02=000000000011b070eff9b2d0a8fce9cb XMM03=000000000011b1402c67c8bc2e329bc3 XMM04=b996cbbd1244873e00000000000ae988 XMM05=59d5b690e0af863b0000000000131c60 XMM06=d770cae21ebfe03d0000000000130ac8 XMM07=e042d86d42eb936e0000000000122068 XMM08=bdf552917fffddea000000000011b140 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000