syzkaller login: [ 39.127309] BUG: Bad rss-counter state mm:000000009bcb31ed type:MM_FILEPAGES val:33 [ 39.128087] BUG: Bad rss-counter state mm:000000009bcb31ed type:MM_ANONPAGES val:22 [ 39.285205] ================================================================== [ 39.286135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.287069] Read of size 8 at addr ffff888019e91058 by task sshd/218 [ 39.287950] [ 39.288217] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.289073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.290041] Call Trace: [ 39.290384] [ 39.290668] dump_stack_lvl+0x91/0xf0 [ 39.291153] print_report+0xcc/0x620 [ 39.291634] ? __virt_addr_valid+0x102/0x340 [ 39.292223] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.292840] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.293452] kasan_report+0xbe/0xf0 [ 39.293926] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.294553] vma_interval_tree_remove+0xc75/0xec0 [ 39.295163] vma_prepare+0xc54/0x11a0 [ 39.295649] __split_vma+0x5af/0x950 [ 39.296143] ? __pfx___split_vma+0x10/0x10 [ 39.296679] ? find_held_lock+0x2c/0x110 [ 39.297207] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.297776] ? lock_is_held_type+0x9f/0x120 [ 39.298316] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.298927] ? mtree_range_walk+0x632/0x900 [ 39.299485] ? mas_walk+0x5c7/0x7c0 [ 39.299991] do_vmi_munmap+0x1f1/0x2b0 [ 39.300495] mmap_region+0x1f9/0x2660 [ 39.300980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.301496] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.302209] ? __pfx_lock_acquire+0x10/0x10 [ 39.302759] ? __pfx_mmap_region+0x10/0x10 [ 39.303299] ? security_mmap_addr+0x7d/0xa0 [ 39.303867] ? get_unmapped_area+0x1f5/0x3f0 [ 39.304438] do_mmap+0x854/0xf00 [ 39.304884] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.305395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.305977] ksys_mmap_pgoff+0x3af/0x500 [ 39.306504] do_syscall_64+0x3f/0x90 [ 39.307000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.307679] RIP: 0033:0x7f38af6e9d82 [ 39.308175] 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 [ 39.310400] RSP: 002b:00007ffff797f898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.311350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38af6e9d82 [ 39.312249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38aeb23000 [ 39.313129] RBP: 00007f38aeb23000 R08: 0000000000000009 R09: 0000000000001000 [ 39.314011] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559287f13ec0 [ 39.314894] R13: 00007ffff797f8b0 R14: 00007ffff797f8e0 R15: 00007ffff797fc40 [ 39.315809] [ 39.316118] [ 39.316341] Allocated by task 211: [ 39.316787] kasan_save_stack+0x22/0x50 [ 39.317313] kasan_set_track+0x25/0x30 [ 39.317826] __kasan_slab_alloc+0x59/0x70 [ 39.318373] kmem_cache_alloc+0x16b/0x370 [ 39.318909] vm_area_dup+0x20/0x160 [ 39.319385] __split_vma+0x170/0x950 [ 39.319877] split_vma+0xc6/0x110 [ 39.320331] mprotect_fixup+0x8d2/0xb30 [ 39.320857] do_mprotect_pkey+0x87e/0xd40 [ 39.321400] __x64_sys_mprotect+0x78/0xc0 [ 39.321952] do_syscall_64+0x3f/0x90 [ 39.322442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.323110] [ 39.323341] Freed by task 211: [ 39.323772] kasan_save_stack+0x22/0x50 [ 39.324293] kasan_set_track+0x25/0x30 [ 39.324809] kasan_save_free_info+0x2b/0x50 [ 39.325359] __kasan_slab_free+0x10a/0x190 [ 39.325919] kmem_cache_free+0x10d/0x4d0 [ 39.326448] rcu_core+0x8c8/0x2860 [ 39.326909] __do_softirq+0x1b7/0x7d4 [ 39.327402] [ 39.327625] Last potentially related work creation: [ 39.328273] kasan_save_stack+0x22/0x50 [ 39.328798] __kasan_record_aux_stack+0x8e/0xa0 [ 39.329450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.330123] remove_vma+0x139/0x170 [ 39.330599] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.331183] do_vmi_munmap+0x1f1/0x2b0 [ 39.331690] __vm_munmap+0x138/0x3a0 [ 39.332195] __x64_sys_munmap+0x59/0x80 [ 39.332718] do_syscall_64+0x3f/0x90 [ 39.333212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.333879] [ 39.334103] The buggy address belongs to the object at ffff888019e91000 [ 39.334103] which belongs to the cache vm_area_struct of size 168 [ 39.335642] The buggy address is located 88 bytes inside of [ 39.335642] freed 168-byte region [ffff888019e91000, ffff888019e910a8) [ 39.337113] [ 39.337338] The buggy address belongs to the physical page: [ 39.338030] page:00000000b01c64d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e91 [ 39.339176] memcg:ffff888018dd8e01 [ 39.339626] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.340358] page_type: 0xffffffff() [ 39.340827] raw: 0100000000000200 ffff88800879fc80 ffffea000067a380 0000000000000005 [ 39.341793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018dd8e01 [ 39.342736] page dumped because: kasan: bad access detected [ 39.343427] [ 39.343649] Memory state around the buggy address: [ 39.344277] ffff888019e90f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 39.345173] ffff888019e90f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.346074] >ffff888019e91000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.346965] ^ [ 39.347732] ffff888019e91080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 39.348639] ffff888019e91100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.349534] ================================================================== [ 39.350720] Disabling lock debugging due to kernel taint [ 41.558105] BUG: Bad rss-counter state mm:0000000023abdb5d type:MM_FILEPAGES val:33 [ 41.559273] BUG: Bad rss-counter state mm:0000000023abdb5d type:MM_ANONPAGES val:22 [ 42.032711] BUG: Bad rss-counter state mm:0000000053792cfa type:MM_FILEPAGES val:33 [ 42.033867] BUG: Bad rss-counter state mm:0000000053792cfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36990' (ECDSA) to the list of known hosts. 2023/06/19 13:39:27 fuzzer started 2023/06/19 13:39:27 dialing manager at localhost:44161 2023/06/19 13:39:27 checking machine... 2023/06/19 13:39:27 checking revisions... [ 42.660254] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:39:27 testing simple program... [ 42.714773] cgroup: Unknown subsys name 'net' [ 42.759987] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:39:26 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888018ee73a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180eff3 RFL=00000283 [--S---C] 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 00007f5974ca5900 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=00007f597525c618 CR3=000000000f520000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007feb39917220 CR3=0000000010234000 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=605afa17b35026a1464dc29c2d9120fb XMM02=ec2efd57dc4c00df000000000011d078 XMM03=80ec2da11aafd64d000000000011d148 XMM04=d7cb2ea503824de500000000000ae988 XMM05=9973cd3cab0b454700000000001344a8 XMM06=806171799158d96700000000001331d8 XMM07=e042d86d42eb936e0000000000123d28 XMM08=80ec2da11aafd64d000000000011d148 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000