syzkaller login: [ 38.921215] BUG: Bad rss-counter state mm:00000000c7da6fdf type:MM_FILEPAGES val:33 [ 38.922611] BUG: Bad rss-counter state mm:00000000c7da6fdf type:MM_ANONPAGES val:22 [ 39.023391] ================================================================== [ 39.024307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.025254] Read of size 8 at addr ffff88800eea85c8 by task sshd/219 [ 39.026031] [ 39.026252] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.027239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.028213] Call Trace: [ 39.028545] [ 39.028854] dump_stack_lvl+0x91/0xf0 [ 39.029348] print_report+0xcc/0x620 [ 39.029830] ? __virt_addr_valid+0x102/0x340 [ 39.030379] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.031007] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.031638] kasan_report+0xbe/0xf0 [ 39.032114] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.032746] vma_interval_tree_remove+0xc75/0xec0 [ 39.033344] vma_prepare+0xc54/0x11a0 [ 39.033825] __split_vma+0x5af/0x950 [ 39.034296] ? __pfx___split_vma+0x10/0x10 [ 39.034826] ? find_held_lock+0x2c/0x110 [ 39.035357] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.035921] ? lock_is_held_type+0x9f/0x120 [ 39.036458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.037063] ? mtree_range_walk+0x632/0x900 [ 39.037614] ? mas_walk+0x5c7/0x7c0 [ 39.038093] do_vmi_munmap+0x1f1/0x2b0 [ 39.038592] mmap_region+0x1f9/0x2660 [ 39.039104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.039622] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.040344] ? __pfx_lock_acquire+0x10/0x10 [ 39.040887] ? __pfx_mmap_region+0x10/0x10 [ 39.041425] ? security_mmap_addr+0x7d/0xa0 [ 39.041966] ? get_unmapped_area+0x1f5/0x3f0 [ 39.042519] do_mmap+0x854/0xf00 [ 39.042973] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.043472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.044033] ksys_mmap_pgoff+0x3af/0x500 [ 39.044548] do_syscall_64+0x3f/0x90 [ 39.045035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.045698] RIP: 0033:0x7f68c4dafd82 [ 39.046161] 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 [ 39.048323] RSP: 002b:00007ffdc3643358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.049236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68c4dafd82 [ 39.050094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68c41e9000 [ 39.050944] RBP: 00007f68c41e9000 R08: 0000000000000009 R09: 0000000000001000 [ 39.051806] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de9199eec0 [ 39.052657] R13: 00007ffdc3643370 R14: 00007ffdc36433a0 R15: 00007ffdc3643700 [ 39.053518] [ 39.053809] [ 39.054026] Allocated by task 212: [ 39.054457] kasan_save_stack+0x22/0x50 [ 39.054981] kasan_set_track+0x25/0x30 [ 39.055482] __kasan_slab_alloc+0x59/0x70 [ 39.056011] kmem_cache_alloc+0x16b/0x370 [ 39.056530] vm_area_dup+0x20/0x160 [ 39.056993] __split_vma+0x170/0x950 [ 39.057466] split_vma+0xc6/0x110 [ 39.057910] mprotect_fixup+0x8d2/0xb30 [ 39.058410] do_mprotect_pkey+0x87e/0xd40 [ 39.058943] __x64_sys_mprotect+0x78/0xc0 [ 39.059474] do_syscall_64+0x3f/0x90 [ 39.059958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.060597] [ 39.060818] Freed by task 203: [ 39.061213] kasan_save_stack+0x22/0x50 [ 39.061724] kasan_set_track+0x25/0x30 [ 39.062230] kasan_save_free_info+0x2b/0x50 [ 39.062769] __kasan_slab_free+0x10a/0x190 [ 39.063317] kmem_cache_free+0x10d/0x4d0 [ 39.063836] rcu_core+0x8c8/0x2860 [ 39.064281] __do_softirq+0x1b7/0x7d4 [ 39.064762] [ 39.064979] Last potentially related work creation: [ 39.065571] kasan_save_stack+0x22/0x50 [ 39.066078] __kasan_record_aux_stack+0x8e/0xa0 [ 39.066651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.067307] remove_vma+0x139/0x170 [ 39.067758] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.068316] do_vmi_munmap+0x1f1/0x2b0 [ 39.068803] __vm_munmap+0x138/0x3a0 [ 39.069273] __x64_sys_munmap+0x59/0x80 [ 39.069777] do_syscall_64+0x3f/0x90 [ 39.070262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.070906] [ 39.071145] The buggy address belongs to the object at ffff88800eea8570 [ 39.071145] which belongs to the cache vm_area_struct of size 168 [ 39.072627] The buggy address is located 88 bytes inside of [ 39.072627] freed 168-byte region [ffff88800eea8570, ffff88800eea8618) [ 39.074047] [ 39.074259] The buggy address belongs to the physical page: [ 39.074927] page:00000000a03b68fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeea8 [ 39.076028] memcg:ffff888014462701 [ 39.076459] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.077123] page_type: 0xffffffff() [ 39.077580] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.078514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014462701 [ 39.079454] page dumped because: kasan: bad access detected [ 39.080129] [ 39.080347] Memory state around the buggy address: [ 39.080931] ffff88800eea8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.081784] ffff88800eea8500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.082651] >ffff88800eea8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.083544] ^ [ 39.084228] ffff88800eea8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.085103] ffff88800eea8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.085963] ================================================================== [ 39.087035] Disabling lock debugging due to kernel taint [ 41.216213] BUG: Bad rss-counter state mm:00000000c082baad type:MM_FILEPAGES val:33 [ 41.217168] BUG: Bad rss-counter state mm:00000000c082baad type:MM_ANONPAGES val:22 [ 41.711125] BUG: Bad rss-counter state mm:00000000868ad0a2 type:MM_FILEPAGES val:33 [ 41.712340] BUG: Bad rss-counter state mm:00000000868ad0a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13144' (ECDSA) to the list of known hosts. 2023/06/20 11:03:33 fuzzer started 2023/06/20 11:03:34 dialing manager at localhost:36067 2023/06/20 11:03:34 checking machine... 2023/06/20 11:03:34 checking revisions... [ 42.389118] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:03:34 testing simple program... [ 42.436776] cgroup: Unknown subsys name 'net' [ 42.475943] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:03:33 Registers: info registers vcpu 0 RAX=ffffffff85d3d350 RBX=0000000000000000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813c95c0 RSP=ffff88801455f910 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88800f2b9e50 R13=fffffbfff0ac57e1 R14=ffffffff8562bf08 R15=dffffc0000000000 RIP=ffffffff8180f036 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 00007f2ccd9a7900 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=00007ff9d096a650 CR3=000000000d82c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a6331d3ea5ab2ea400000000000ae988 XMM05=2ff0095a2ce8cb320000000000132f80 XMM06=806171799158d9670000000000131a00 XMM07=fb795ef6d65770560000000000121f68 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000564d17615734 CR3=000000001692e000 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=2033333a33303a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a33303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000