syzkaller login: [ 30.003783] BUG: Bad rss-counter state mm:00000000caf5df31 type:MM_FILEPAGES val:33 [ 30.004958] BUG: Bad rss-counter state mm:00000000caf5df31 type:MM_ANONPAGES val:22 [ 30.163153] ================================================================== [ 30.164051] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.165001] Read of size 8 at addr ffff88800f59ed08 by task sshd/220 [ 30.165765] [ 30.165983] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.166923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.167880] Call Trace: [ 30.168224] [ 30.168523] dump_stack_lvl+0x91/0xf0 [ 30.169010] print_report+0xcc/0x620 [ 30.169493] ? __virt_addr_valid+0x102/0x340 [ 30.170037] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.170656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.171265] kasan_report+0xbe/0xf0 [ 30.171743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.172392] vma_interval_tree_remove+0xc75/0xec0 [ 30.173071] vma_prepare+0xc54/0x11a0 [ 30.173570] __split_vma+0x5af/0x950 [ 30.174085] ? __pfx___split_vma+0x10/0x10 [ 30.174658] ? find_held_lock+0x2c/0x110 [ 30.175260] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.175834] ? lock_is_held_type+0x9f/0x120 [ 30.176437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.177095] ? mtree_range_walk+0x632/0x900 [ 30.177731] ? mas_walk+0x5c7/0x7c0 [ 30.178187] do_vmi_munmap+0x1f1/0x2b0 [ 30.178665] mmap_region+0x1f9/0x2660 [ 30.179128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.179615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.180304] ? __pfx_lock_acquire+0x10/0x10 [ 30.180839] ? __pfx_mmap_region+0x10/0x10 [ 30.181344] ? security_mmap_addr+0x7d/0xa0 [ 30.181847] ? get_unmapped_area+0x1f5/0x3f0 [ 30.182443] do_mmap+0x854/0xf00 [ 30.182891] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.183398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.183968] ksys_mmap_pgoff+0x3af/0x500 [ 30.184649] do_syscall_64+0x3f/0x90 [ 30.185234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.186004] RIP: 0033:0x7fb0751c3d82 [ 30.186554] 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 [ 30.189087] RSP: 002b:00007ffc415bff38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.190148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0751c3d82 [ 30.191154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0745fd000 [ 30.192198] RBP: 00007fb0745fd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.193074] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee64b00ec0 [ 30.193922] R13: 00007ffc415bff50 R14: 00007ffc415bff80 R15: 00007ffc415c02e0 [ 30.194770] [ 30.195066] [ 30.195285] Allocated by task 213: [ 30.195715] kasan_save_stack+0x22/0x50 [ 30.196231] kasan_set_track+0x25/0x30 [ 30.196728] __kasan_slab_alloc+0x59/0x70 [ 30.197257] kmem_cache_alloc+0x16b/0x370 [ 30.197813] vm_area_dup+0x20/0x160 [ 30.198356] __split_vma+0x170/0x950 [ 30.198828] split_vma+0xc6/0x110 [ 30.199271] mprotect_fixup+0x8d2/0xb30 [ 30.199779] do_mprotect_pkey+0x87e/0xd40 [ 30.200334] __x64_sys_mprotect+0x78/0xc0 [ 30.200864] do_syscall_64+0x3f/0x90 [ 30.201341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.202005] [ 30.202220] Freed by task 213: [ 30.202624] kasan_save_stack+0x22/0x50 [ 30.203128] kasan_set_track+0x25/0x30 [ 30.203627] kasan_save_free_info+0x2b/0x50 [ 30.204169] __kasan_slab_free+0x10a/0x190 [ 30.204727] kmem_cache_free+0x10d/0x4d0 [ 30.205243] rcu_core+0x8c8/0x2860 [ 30.205695] __do_softirq+0x1b7/0x7d4 [ 30.206187] [ 30.206403] Last potentially related work creation: [ 30.206991] kasan_save_stack+0x22/0x50 [ 30.207494] __kasan_record_aux_stack+0x8e/0xa0 [ 30.208063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.208741] remove_vma+0x139/0x170 [ 30.209198] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.209755] do_vmi_munmap+0x1f1/0x2b0 [ 30.210241] __vm_munmap+0x138/0x3a0 [ 30.210709] __x64_sys_munmap+0x59/0x80 [ 30.211206] do_syscall_64+0x3f/0x90 [ 30.211688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.212338] [ 30.212553] The buggy address belongs to the object at ffff88800f59ecb0 [ 30.212553] which belongs to the cache vm_area_struct of size 168 [ 30.214027] The buggy address is located 88 bytes inside of [ 30.214027] freed 168-byte region [ffff88800f59ecb0, ffff88800f59ed58) [ 30.215435] [ 30.215649] The buggy address belongs to the physical page: [ 30.216315] page:000000004930aeca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf59e [ 30.217405] memcg:ffff88800f599101 [ 30.217840] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.218480] page_type: 0xffffffff() [ 30.218937] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.219859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f599101 [ 30.220782] page dumped because: kasan: bad access detected [ 30.221449] [ 30.221663] Memory state around the buggy address: [ 30.222244] ffff88800f59ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.223101] ffff88800f59ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.223949] >ffff88800f59ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.224816] ^ [ 30.225259] ffff88800f59ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.226108] ffff88800f59ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.226963] ================================================================== [ 30.228035] Disabling lock debugging due to kernel taint [ 32.399892] BUG: Bad rss-counter state mm:000000002b03b866 type:MM_FILEPAGES val:33 [ 32.400906] BUG: Bad rss-counter state mm:000000002b03b866 type:MM_ANONPAGES val:22 [ 32.882706] BUG: Bad rss-counter state mm:000000007412e057 type:MM_FILEPAGES val:33 [ 32.883760] BUG: Bad rss-counter state mm:000000007412e057 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18412' (ECDSA) to the list of known hosts. 2023/06/20 19:54:37 fuzzer started 2023/06/20 19:54:37 dialing manager at localhost:36067 2023/06/20 19:54:37 checking machine... 2023/06/20 19:54:37 checking revisions... [ 33.616671] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:54:37 testing simple program... [ 33.660709] cgroup: Unknown subsys name 'net' [ 33.717384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:54:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffb7f754bb0 CR3=000000000c786000 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=3bf4087e3eaa60a3554f7c4c657ab3c6 XMM02=2c67c8bc2e329bc3000000000011a018 XMM03=fb795ef6d65770560000000000121590 XMM04=a35557d11ddc274e00000000000ae988 XMM05=19e9129bd510f23500000000001313e8 XMM06=e3e2f56af6572c5f0000000000130250 XMM07=e042d86d42eb936e0000000000121810 XMM08=2ab2b05ee4181110000000000011a078 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800f5ac420 R13=ffff88800f5ac3d0 R14=ffffffff813782f8 R15=ffff88800d953700 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007fb3799d0900 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=00007ffea8772000 CR3=000000000e858000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000