syzkaller login: [ 31.544700] BUG: Bad rss-counter state mm:0000000072342ff8 type:MM_FILEPAGES val:33 [ 31.546109] BUG: Bad rss-counter state mm:0000000072342ff8 type:MM_ANONPAGES val:22 [ 31.703717] ================================================================== [ 31.704782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.705713] Read of size 8 at addr ffff8880168d8d08 by task sshd/220 [ 31.706597] [ 31.706812] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.707681] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.708685] Call Trace: [ 31.708998] [ 31.709277] dump_stack_lvl+0x91/0xf0 [ 31.709764] print_report+0xcc/0x620 [ 31.710261] ? __virt_addr_valid+0x102/0x340 [ 31.710826] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.711443] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.712060] kasan_report+0xbe/0xf0 [ 31.712573] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.713195] vma_interval_tree_remove+0xc75/0xec0 [ 31.713793] vma_prepare+0xc54/0x11a0 [ 31.714267] __split_vma+0x5af/0x950 [ 31.714736] ? __pfx___split_vma+0x10/0x10 [ 31.715260] ? find_held_lock+0x2c/0x110 [ 31.715783] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.716366] ? lock_is_held_type+0x9f/0x120 [ 31.716912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.717517] ? mtree_range_walk+0x632/0x900 [ 31.718067] ? mas_walk+0x5c7/0x7c0 [ 31.718549] do_vmi_munmap+0x1f1/0x2b0 [ 31.719041] mmap_region+0x1f9/0x2660 [ 31.719520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.720023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.720743] ? __pfx_lock_acquire+0x10/0x10 [ 31.721282] ? __pfx_mmap_region+0x10/0x10 [ 31.721817] ? security_mmap_addr+0x7d/0xa0 [ 31.722351] ? get_unmapped_area+0x1f5/0x3f0 [ 31.722911] do_mmap+0x854/0xf00 [ 31.723351] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.723847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.724423] ksys_mmap_pgoff+0x3af/0x500 [ 31.724931] do_syscall_64+0x3f/0x90 [ 31.725416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.726065] RIP: 0033:0x7fbd7036dd82 [ 31.726523] 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 [ 31.728641] RSP: 002b:00007ffd45045ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.729545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd7036dd82 [ 31.730392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd6f7a7000 [ 31.731240] RBP: 00007fbd6f7a7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.732094] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c65580ec0 [ 31.732960] R13: 00007ffd45045ae0 R14: 00007ffd45045b10 R15: 00007ffd45045e70 [ 31.733819] [ 31.734109] [ 31.734324] Allocated by task 213: [ 31.734761] kasan_save_stack+0x22/0x50 [ 31.735265] kasan_set_track+0x25/0x30 [ 31.735768] __kasan_slab_alloc+0x59/0x70 [ 31.736304] kmem_cache_alloc+0x16b/0x370 [ 31.736821] vm_area_dup+0x20/0x160 [ 31.737279] __split_vma+0x170/0x950 [ 31.737751] split_vma+0xc6/0x110 [ 31.738189] mprotect_fixup+0x8d2/0xb30 [ 31.738690] do_mprotect_pkey+0x87e/0xd40 [ 31.739213] __x64_sys_mprotect+0x78/0xc0 [ 31.739739] do_syscall_64+0x3f/0x90 [ 31.740221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.740866] [ 31.741082] Freed by task 210: [ 31.741469] kasan_save_stack+0x22/0x50 [ 31.741973] kasan_set_track+0x25/0x30 [ 31.742469] kasan_save_free_info+0x2b/0x50 [ 31.743001] __kasan_slab_free+0x10a/0x190 [ 31.743536] kmem_cache_free+0x10d/0x4d0 [ 31.744049] rcu_core+0x8c8/0x2860 [ 31.744510] __do_softirq+0x1b7/0x7d4 [ 31.744986] [ 31.745200] Last potentially related work creation: [ 31.745787] kasan_save_stack+0x22/0x50 [ 31.746297] __kasan_record_aux_stack+0x8e/0xa0 [ 31.746879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.747525] remove_vma+0x139/0x170 [ 31.747977] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.748545] do_vmi_munmap+0x1f1/0x2b0 [ 31.749032] __vm_munmap+0x138/0x3a0 [ 31.749500] __x64_sys_munmap+0x59/0x80 [ 31.749997] do_syscall_64+0x3f/0x90 [ 31.750472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.751116] [ 31.751333] The buggy address belongs to the object at ffff8880168d8cb0 [ 31.751333] which belongs to the cache vm_area_struct of size 168 [ 31.752828] The buggy address is located 88 bytes inside of [ 31.752828] freed 168-byte region [ffff8880168d8cb0, ffff8880168d8d58) [ 31.754238] [ 31.754459] The buggy address belongs to the physical page: [ 31.755118] page:000000004d9f97b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168d8 [ 31.756211] memcg:ffff888017c41501 [ 31.756638] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.757282] page_type: 0xffffffff() [ 31.757734] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.758649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c41501 [ 31.759551] page dumped because: kasan: bad access detected [ 31.760218] [ 31.760437] Memory state around the buggy address: [ 31.761024] ffff8880168d8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.761878] ffff8880168d8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.762738] >ffff8880168d8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.763595] ^ [ 31.764032] ffff8880168d8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.764901] ffff8880168d8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.765749] ================================================================== [ 31.766726] Disabling lock debugging due to kernel taint [ 33.311805] BUG: Bad rss-counter state mm:000000008bfafbac type:MM_FILEPAGES val:33 [ 33.312532] BUG: Bad rss-counter state mm:000000008bfafbac type:MM_ANONPAGES val:22 [ 33.729122] BUG: Bad rss-counter state mm:000000001b562d40 type:MM_FILEPAGES val:33 [ 33.730147] BUG: Bad rss-counter state mm:000000001b562d40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19550' (ECDSA) to the list of known hosts. 2023/06/20 23:48:21 fuzzer started 2023/06/20 23:48:21 dialing manager at localhost:36067 2023/06/20 23:48:21 checking machine... 2023/06/20 23:48:21 checking revisions... [ 34.502535] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:48:21 testing simple program... [ 34.555822] cgroup: Unknown subsys name 'net' [ 34.612383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:48:21 Registers: info registers vcpu 0 RAX=ffffffff85d3e490 RBX=0000000000000200 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=0000000000000009 RBP=0000000000000045 RSP=ffff88806ce09e40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=fffffffffffffff6 R13=ffff88806ce09ee8 R14=ffff88806ce3a360 R15=0000000000000200 RIP=ffffffff8118deed RFL=00000002 [-------] 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 00007faa2cf4f900 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=00007ffca9124000 CR3=0000000019c76000 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=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 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=0000000000000001 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=00007fe79d2002b0 CR3=000000000cb02000 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=2030323a38343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a38343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000