syzkaller login: [ 31.533741] BUG: Bad rss-counter state mm:000000004908ab5b type:MM_FILEPAGES val:33 [ 31.534985] BUG: Bad rss-counter state mm:000000004908ab5b type:MM_ANONPAGES val:22 [ 31.574935] ================================================================== [ 31.576152] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.577195] Read of size 8 at addr ffff88800cd36058 by task sshd/221 [ 31.578289] [ 31.578538] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.579595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.580775] Call Trace: [ 31.581165] [ 31.581506] dump_stack_lvl+0x91/0xf0 [ 31.582101] print_report+0xcc/0x620 [ 31.582662] ? __virt_addr_valid+0x102/0x340 [ 31.583402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584210] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584889] kasan_report+0xbe/0xf0 [ 31.585414] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.586087] vma_interval_tree_remove+0xc75/0xec0 [ 31.586688] vma_prepare+0xc54/0x11a0 [ 31.587163] __split_vma+0x5af/0x950 [ 31.587642] ? __pfx___split_vma+0x10/0x10 [ 31.588233] ? find_held_lock+0x2c/0x110 [ 31.588826] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.589466] ? lock_is_held_type+0x9f/0x120 [ 31.590056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.590654] ? mtree_range_walk+0x632/0x900 [ 31.591201] ? mas_walk+0x5c7/0x7c0 [ 31.591672] do_vmi_munmap+0x1f1/0x2b0 [ 31.592210] mmap_region+0x1f9/0x2660 [ 31.592756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.593334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.594139] ? __pfx_lock_acquire+0x10/0x10 [ 31.594744] ? __pfx_mmap_region+0x10/0x10 [ 31.595344] ? security_mmap_addr+0x7d/0xa0 [ 31.595946] ? get_unmapped_area+0x1f5/0x3f0 [ 31.596584] do_mmap+0x854/0xf00 [ 31.597078] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.597647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.598241] ksys_mmap_pgoff+0x3af/0x500 [ 31.598747] do_syscall_64+0x3f/0x90 [ 31.599277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.600014] RIP: 0033:0x7ff21771fd82 [ 31.600556] 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 [ 31.602846] RSP: 002b:00007ffdbab8f888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.603747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff21771fd82 [ 31.604698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff216b59000 [ 31.605643] RBP: 00007ff216b59000 R08: 0000000000000009 R09: 0000000000001000 [ 31.606587] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e09b5cb20 [ 31.607523] R13: 00007ffdbab8f8a0 R14: 00007ffdbab8f8d0 R15: 00007ffdbab8fc30 [ 31.608500] [ 31.608824] [ 31.609069] Allocated by task 214: [ 31.609547] kasan_save_stack+0x22/0x50 [ 31.610108] kasan_set_track+0x25/0x30 [ 31.610665] __kasan_slab_alloc+0x59/0x70 [ 31.611242] kmem_cache_alloc+0x16b/0x370 [ 31.611815] vm_area_dup+0x20/0x160 [ 31.612324] __split_vma+0x170/0x950 [ 31.612841] split_vma+0xc6/0x110 [ 31.613348] mprotect_fixup+0x8d2/0xb30 [ 31.613938] do_mprotect_pkey+0x87e/0xd40 [ 31.614552] __x64_sys_mprotect+0x78/0xc0 [ 31.615168] do_syscall_64+0x3f/0x90 [ 31.615795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.616573] [ 31.616826] Freed by task 214: [ 31.617278] kasan_save_stack+0x22/0x50 [ 31.617872] kasan_set_track+0x25/0x30 [ 31.618447] kasan_save_free_info+0x2b/0x50 [ 31.619056] __kasan_slab_free+0x10a/0x190 [ 31.619669] kmem_cache_free+0x10d/0x4d0 [ 31.620271] rcu_core+0x8c8/0x2860 [ 31.620786] __do_softirq+0x1b7/0x7d4 [ 31.621340] [ 31.621592] Last potentially related work creation: [ 31.622239] kasan_save_stack+0x22/0x50 [ 31.622742] __kasan_record_aux_stack+0x8e/0xa0 [ 31.623313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.623963] remove_vma+0x139/0x170 [ 31.624507] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.625152] do_vmi_munmap+0x1f1/0x2b0 [ 31.625725] __vm_munmap+0x138/0x3a0 [ 31.626227] __x64_sys_munmap+0x59/0x80 [ 31.626726] do_syscall_64+0x3f/0x90 [ 31.627248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.628000] [ 31.628270] The buggy address belongs to the object at ffff88800cd36000 [ 31.628270] which belongs to the cache vm_area_struct of size 168 [ 31.630015] The buggy address is located 88 bytes inside of [ 31.630015] freed 168-byte region [ffff88800cd36000, ffff88800cd360a8) [ 31.631557] [ 31.631777] The buggy address belongs to the physical page: [ 31.632443] page:000000005ccbd0fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd36 [ 31.633527] memcg:ffff888018e8e001 [ 31.633956] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.634601] page_type: 0xffffffff() [ 31.635050] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.635976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e8e001 [ 31.636886] page dumped because: kasan: bad access detected [ 31.637562] [ 31.637784] Memory state around the buggy address: [ 31.638370] ffff88800cd35f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 31.639220] ffff88800cd35f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.640085] >ffff88800cd36000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.640937] ^ [ 31.641665] ffff88800cd36080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.642518] ffff88800cd36100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.643378] ================================================================== [ 31.644330] Disabling lock debugging due to kernel taint [ 34.626950] BUG: Bad rss-counter state mm:00000000f12cdf5e type:MM_FILEPAGES val:33 [ 34.627989] BUG: Bad rss-counter state mm:00000000f12cdf5e type:MM_ANONPAGES val:22 [ 35.203340] BUG: Bad rss-counter state mm:0000000059bf6df0 type:MM_FILEPAGES val:33 [ 35.204572] BUG: Bad rss-counter state mm:0000000059bf6df0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4753' (ECDSA) to the list of known hosts. 2023/06/20 22:02:56 fuzzer started 2023/06/20 22:02:56 dialing manager at localhost:36067 2023/06/20 22:02:56 checking machine... 2023/06/20 22:02:56 checking revisions... [ 35.838744] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:02:56 testing simple program... [ 35.894139] cgroup: Unknown subsys name 'net' [ 35.943185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c1329 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09930 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f79dfb9d900 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=00007f79e0154618 CR3=0000000019d28000 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=00007f193fd316d0 CR3=00000000094f2000 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=64aa0a51d578c8abaa4e18ee6ee56c20 XMM02=000000000011c8d8ec2efd57dc4c00df XMM03=00000000001232786e60603a6eb72a61 XMM04=a484be56a6721c2300000000000ae988 XMM05=e4cb8bb95a7664b600000000001330f0 XMM06=98363ebbac372f880000000000131f58 XMM07=e042d86d42eb936e0000000000123c60 XMM08=6e60603a6eb72a61000000000011c938 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000