syzkaller login: [ 38.813163] BUG: Bad rss-counter state mm:000000000de7b83e type:MM_FILEPAGES val:33 [ 38.815109] BUG: Bad rss-counter state mm:000000000de7b83e type:MM_ANONPAGES val:22 [ 38.983874] ================================================================== [ 38.984934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.986015] Read of size 8 at addr ffff888017d26968 by task sshd/219 [ 38.987005] [ 38.987258] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.988240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.989370] Call Trace: [ 38.989741] [ 38.990103] dump_stack_lvl+0x91/0xf0 [ 38.990666] print_report+0xcc/0x620 [ 38.991227] ? __virt_addr_valid+0x102/0x340 [ 38.991862] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.992566] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.993279] kasan_report+0xbe/0xf0 [ 38.993859] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.994598] vma_interval_tree_remove+0xc75/0xec0 [ 38.995318] vma_prepare+0xc54/0x11a0 [ 38.995885] __split_vma+0x5af/0x950 [ 38.996455] ? __pfx___split_vma+0x10/0x10 [ 38.997089] ? find_held_lock+0x2c/0x110 [ 38.997714] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.998409] ? lock_is_held_type+0x9f/0x120 [ 38.999057] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.999777] ? mtree_range_walk+0x632/0x900 [ 39.000435] ? mas_walk+0x5c7/0x7c0 [ 39.001001] do_vmi_munmap+0x1f1/0x2b0 [ 39.001587] mmap_region+0x1f9/0x2660 [ 39.002165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.002762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.003607] ? __pfx_lock_acquire+0x10/0x10 [ 39.004234] ? __pfx_mmap_region+0x10/0x10 [ 39.004857] ? security_mmap_addr+0x7d/0xa0 [ 39.005487] ? get_unmapped_area+0x1f5/0x3f0 [ 39.006153] do_mmap+0x854/0xf00 [ 39.006670] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.007256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.007921] ksys_mmap_pgoff+0x3af/0x500 [ 39.008524] do_syscall_64+0x3f/0x90 [ 39.009087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.009871] RIP: 0033:0x7f244a085d82 [ 39.010409] 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 [ 39.012923] RSP: 002b:00007fff1b822cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.013996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f244a085d82 [ 39.014995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24494bf000 [ 39.015984] RBP: 00007f24494bf000 R08: 0000000000000009 R09: 0000000000001000 [ 39.017195] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fa000fec0 [ 39.018288] R13: 00007fff1b822ce0 R14: 00007fff1b822d10 R15: 00007fff1b823070 [ 39.019297] [ 39.019635] [ 39.019885] Allocated by task 212: [ 39.020382] kasan_save_stack+0x22/0x50 [ 39.020970] kasan_set_track+0x25/0x30 [ 39.021559] __kasan_slab_alloc+0x59/0x70 [ 39.022178] kmem_cache_alloc+0x16b/0x370 [ 39.022779] vm_area_dup+0x20/0x160 [ 39.023303] __split_vma+0x170/0x950 [ 39.023847] split_vma+0xc6/0x110 [ 39.024356] mprotect_fixup+0x8d2/0xb30 [ 39.024937] do_mprotect_pkey+0x87e/0xd40 [ 39.025547] __x64_sys_mprotect+0x78/0xc0 [ 39.026151] do_syscall_64+0x3f/0x90 [ 39.026706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027455] [ 39.027704] Freed by task 212: [ 39.028161] kasan_save_stack+0x22/0x50 [ 39.028739] kasan_set_track+0x25/0x30 [ 39.029314] kasan_save_free_info+0x2b/0x50 [ 39.029951] __kasan_slab_free+0x10a/0x190 [ 39.030568] kmem_cache_free+0x10d/0x4d0 [ 39.031148] rcu_core+0x8c8/0x2860 [ 39.031652] __do_softirq+0x1b7/0x7d4 [ 39.032198] [ 39.032440] Last potentially related work creation: [ 39.033113] kasan_save_stack+0x22/0x50 [ 39.033687] __kasan_record_aux_stack+0x8e/0xa0 [ 39.034347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.035078] remove_vma+0x139/0x170 [ 39.035593] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.036231] do_vmi_munmap+0x1f1/0x2b0 [ 39.036782] __vm_munmap+0x138/0x3a0 [ 39.037316] __x64_sys_munmap+0x59/0x80 [ 39.037900] do_syscall_64+0x3f/0x90 [ 39.038447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.039185] [ 39.039430] The buggy address belongs to the object at ffff888017d26910 [ 39.039430] which belongs to the cache vm_area_struct of size 168 [ 39.041107] The buggy address is located 88 bytes inside of [ 39.041107] freed 168-byte region [ffff888017d26910, ffff888017d269b8) [ 39.042721] [ 39.042964] The buggy address belongs to the physical page: [ 39.043721] page:00000000aa499b62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d26 [ 39.044967] memcg:ffff88800e6bb501 [ 39.045445] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.046203] page_type: 0xffffffff() [ 39.046708] raw: 0100000000000200 ffff8880087a0c80 ffffea000036d680 dead000000000008 [ 39.047741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6bb501 [ 39.048761] page dumped because: kasan: bad access detected [ 39.049510] [ 39.049754] Memory state around the buggy address: [ 39.050413] ffff888017d26800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.051385] ffff888017d26880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.052347] >ffff888017d26900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.053313] ^ [ 39.054196] ffff888017d26980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.055177] ffff888017d26a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.056159] ================================================================== [ 39.057322] Disabling lock debugging due to kernel taint [ 41.050047] BUG: Bad rss-counter state mm:00000000214f5081 type:MM_FILEPAGES val:33 [ 41.051203] BUG: Bad rss-counter state mm:00000000214f5081 type:MM_ANONPAGES val:22 [ 41.543254] BUG: Bad rss-counter state mm:00000000ea56eac7 type:MM_FILEPAGES val:33 [ 41.544545] BUG: Bad rss-counter state mm:00000000ea56eac7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44756' (ECDSA) to the list of known hosts. 2023/06/21 06:14:46 fuzzer started 2023/06/21 06:14:46 dialing manager at localhost:36067 2023/06/21 06:14:46 checking machine... 2023/06/21 06:14:46 checking revisions... [ 42.316732] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:14:46 testing simple program... [ 42.376888] cgroup: Unknown subsys name 'net' [ 42.423021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:14:46 Registers: info registers vcpu 0 RAX=ffffffff818dac68 RBX=ffffffff85e0bef8 RCX=ffffffff818dae7a RDX=0000000000000000 RSI=ffffffff8614dcd6 RDI=ffffffff85e0bef8 RBP=ffffffff85e0befc RSP=ffff88806ce099e0 R8 =ffffffff8614dcd6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002454d R12=ffffffff85e0bef8 R13=ffffffff85e0bef8 R14=ffffffff85e0bef8 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0fefce9900 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=00007f0fef100100 CR3=0000000008c70000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3f5228900046ec8200000000000ae988 XMM05=327e86888a85f75900000000001336e0 XMM06=dfcdbad4f1609c370000000000131b58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000741f3053 RBX=000000001a47decb RCX=ffff888018387abc RDX=000000000000000d RSI=0000000000000011 RDI=000000001027b7a4 RBP=ffff888008442000 RSP=ffff888018387a30 R8 =00000000ffffffff R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff888018387a98 R15=000000000000000d RIP=ffffffff82270447 RFL=00000213 [----A-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 00007f1c4afe8900 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=00007f1c4b59f618 CR3=0000000017d2c000 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=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