syzkaller login: [ 38.554117] BUG: Bad rss-counter state mm:00000000323c5528 type:MM_FILEPAGES val:33 [ 38.556007] BUG: Bad rss-counter state mm:00000000323c5528 type:MM_ANONPAGES val:22 [ 38.711982] ================================================================== [ 38.712883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.713810] Read of size 8 at addr ffff88800ee27798 by task sshd/220 [ 38.714577] [ 38.714794] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.715794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.716759] Call Trace: [ 38.717079] [ 38.717363] dump_stack_lvl+0x91/0xf0 [ 38.717987] print_report+0xcc/0x620 [ 38.718582] ? __virt_addr_valid+0x102/0x340 [ 38.719225] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.719942] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.720673] kasan_report+0xbe/0xf0 [ 38.721230] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.721978] vma_interval_tree_remove+0xc75/0xec0 [ 38.722716] vma_prepare+0xc54/0x11a0 [ 38.723198] __split_vma+0x5af/0x950 [ 38.723666] ? __pfx___split_vma+0x10/0x10 [ 38.724194] ? find_held_lock+0x2c/0x110 [ 38.724707] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.725267] ? lock_is_held_type+0x9f/0x120 [ 38.725801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.726417] ? mtree_range_walk+0x632/0x900 [ 38.726964] ? mas_walk+0x5c7/0x7c0 [ 38.727433] do_vmi_munmap+0x1f1/0x2b0 [ 38.727922] mmap_region+0x1f9/0x2660 [ 38.728405] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.728909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.729622] ? __pfx_lock_acquire+0x10/0x10 [ 38.730151] ? __pfx_mmap_region+0x10/0x10 [ 38.730693] ? security_mmap_addr+0x7d/0xa0 [ 38.731222] ? get_unmapped_area+0x1f5/0x3f0 [ 38.731767] do_mmap+0x854/0xf00 [ 38.732207] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.732704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.733272] ksys_mmap_pgoff+0x3af/0x500 [ 38.733779] do_syscall_64+0x3f/0x90 [ 38.734252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.734897] RIP: 0033:0x7fb1d5b82d82 [ 38.735349] 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 [ 38.737471] RSP: 002b:00007fffd7b310d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.738396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1d5b82d82 [ 38.739241] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1d4fbc000 [ 38.740075] RBP: 00007fb1d4fbc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.740907] R10: 0000000000000812 R11: 0000000000000206 R12: 000056125f12eb20 [ 38.741747] R13: 00007fffd7b310f0 R14: 00007fffd7b31120 R15: 00007fffd7b31480 [ 38.742612] [ 38.742912] [ 38.743123] Allocated by task 213: [ 38.743545] kasan_save_stack+0x22/0x50 [ 38.744044] kasan_set_track+0x25/0x30 [ 38.744532] __kasan_slab_alloc+0x59/0x70 [ 38.745053] kmem_cache_alloc+0x16b/0x370 [ 38.745561] vm_area_dup+0x20/0x160 [ 38.746013] __split_vma+0x170/0x950 [ 38.746484] split_vma+0xc6/0x110 [ 38.746920] mprotect_fixup+0x8d2/0xb30 [ 38.747418] do_mprotect_pkey+0x87e/0xd40 [ 38.747931] __x64_sys_mprotect+0x78/0xc0 [ 38.748450] do_syscall_64+0x3f/0x90 [ 38.748921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.749559] [ 38.749775] Freed by task 213: [ 38.750174] kasan_save_stack+0x22/0x50 [ 38.750697] kasan_set_track+0x25/0x30 [ 38.751186] kasan_save_free_info+0x2b/0x50 [ 38.751714] __kasan_slab_free+0x10a/0x190 [ 38.752244] kmem_cache_free+0x10d/0x4d0 [ 38.752743] rcu_core+0x8c8/0x2860 [ 38.753190] __do_softirq+0x1b7/0x7d4 [ 38.753665] [ 38.753877] Last potentially related work creation: [ 38.754465] kasan_save_stack+0x22/0x50 [ 38.754967] __kasan_record_aux_stack+0x8e/0xa0 [ 38.755533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.756170] remove_vma+0x139/0x170 [ 38.756704] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.757262] do_vmi_munmap+0x1f1/0x2b0 [ 38.757740] __vm_munmap+0x138/0x3a0 [ 38.758203] __x64_sys_munmap+0x59/0x80 [ 38.758712] do_syscall_64+0x3f/0x90 [ 38.759189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.759823] [ 38.760037] The buggy address belongs to the object at ffff88800ee27740 [ 38.760037] which belongs to the cache vm_area_struct of size 168 [ 38.761502] The buggy address is located 88 bytes inside of [ 38.761502] freed 168-byte region [ffff88800ee27740, ffff88800ee277e8) [ 38.762911] [ 38.763125] The buggy address belongs to the physical page: [ 38.763776] page:00000000c9584c4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee27 [ 38.764861] memcg:ffff888016bf8801 [ 38.765286] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.765918] page_type: 0xffffffff() [ 38.766365] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.767300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bf8801 [ 38.768213] page dumped because: kasan: bad access detected [ 38.768867] [ 38.769082] Memory state around the buggy address: [ 38.769665] ffff88800ee27680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.770518] ffff88800ee27700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.771373] >ffff88800ee27780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.772221] ^ [ 38.772706] ffff88800ee27800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.773563] ffff88800ee27880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.774423] ================================================================== [ 38.775386] Disabling lock debugging due to kernel taint [ 41.561022] BUG: Bad rss-counter state mm:00000000b3e13dda type:MM_FILEPAGES val:33 [ 41.562251] BUG: Bad rss-counter state mm:00000000b3e13dda type:MM_ANONPAGES val:22 [ 42.098324] BUG: Bad rss-counter state mm:00000000c7dddd46 type:MM_FILEPAGES val:33 [ 42.099546] BUG: Bad rss-counter state mm:00000000c7dddd46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53609' (ECDSA) to the list of known hosts. 2023/06/19 15:22:01 fuzzer started 2023/06/19 15:22:02 dialing manager at localhost:44161 2023/06/19 15:22:02 checking machine... 2023/06/19 15:22:02 checking revisions... [ 42.770575] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:22:02 testing simple program... [ 42.812468] cgroup: Unknown subsys name 'net' [ 42.864851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:21:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001255 RCX=ffffffff8171ac91 RDX=ffff888019cab680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888009d2c570 RSP=ffff8880141f7e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=0000000000000000 R13=0000563ea6252288 R14=ffff888009d2c580 R15=0000000000000040 RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 00007f0ce6835900 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=0000563ea6252288 CR3=000000000d7dc000 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=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81651c02 RDX=ffff88800903b680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000001 RSP=ffff8880090df1b8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=0000000000000001 R13=ffff8880197602b0 R14=ffffffffffffffff R15=ffff88801584e000 RIP=ffffffff814c0388 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 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=0000563ea622b218 CR3=0000000005482000 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=0000cf7c000000140000000000000000 XMM02=0000002cfffa58980000cf9400000014 XMM03=0e42028d100e42000000011efffa58b0 XMM04=0e48280e0a41020b46080e42100e4218 XMM05=83280e410486200e41038c180e42028d XMM06=000000500000000000000047fffa5990 XMM07=42100e42180e41200e44280e0a930203 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000