syzkaller login: [ 31.982291] BUG: Bad rss-counter state mm:00000000e43a6de3 type:MM_FILEPAGES val:33 [ 31.983545] BUG: Bad rss-counter state mm:00000000e43a6de3 type:MM_ANONPAGES val:22 [ 32.027030] ================================================================== [ 32.028170] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.029309] Read of size 8 at addr ffff88800e6df798 by task sshd/219 [ 32.030161] [ 32.030409] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.031391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.032441] Call Trace: [ 32.032785] [ 32.033090] dump_stack_lvl+0x91/0xf0 [ 32.033631] print_report+0xcc/0x620 [ 32.034163] ? __virt_addr_valid+0x102/0x340 [ 32.034770] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.035457] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.036139] kasan_report+0xbe/0xf0 [ 32.036668] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.037359] vma_interval_tree_remove+0xc75/0xec0 [ 32.038049] vma_prepare+0xc54/0x11a0 [ 32.038582] __split_vma+0x5af/0x950 [ 32.039107] ? __pfx___split_vma+0x10/0x10 [ 32.039693] ? find_held_lock+0x2c/0x110 [ 32.040268] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.040889] ? lock_is_held_type+0x9f/0x120 [ 32.041514] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.042189] ? mtree_range_walk+0x632/0x900 [ 32.042808] ? mas_walk+0x5c7/0x7c0 [ 32.043346] do_vmi_munmap+0x1f1/0x2b0 [ 32.043893] mmap_region+0x1f9/0x2660 [ 32.044418] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.044987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.045812] ? __pfx_lock_acquire+0x10/0x10 [ 32.046385] ? __pfx_mmap_region+0x10/0x10 [ 32.046950] ? security_mmap_addr+0x7d/0xa0 [ 32.047518] ? get_unmapped_area+0x1f5/0x3f0 [ 32.048105] do_mmap+0x854/0xf00 [ 32.048570] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.049098] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.049725] ksys_mmap_pgoff+0x3af/0x500 [ 32.050266] do_syscall_64+0x3f/0x90 [ 32.050783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.051485] RIP: 0033:0x7f8290c85d82 [ 32.051979] 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 [ 32.054270] RSP: 002b:00007ffc014ffda8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.055245] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8290c85d82 [ 32.056160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82900bf000 [ 32.057067] RBP: 00007f82900bf000 R08: 0000000000000009 R09: 0000000000001000 [ 32.057982] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615e82bc980 [ 32.058889] R13: 00007ffc014ffdc0 R14: 00007ffc014ffdf0 R15: 00007ffc01500150 [ 32.059806] [ 32.060117] [ 32.060347] Allocated by task 212: [ 32.060809] kasan_save_stack+0x22/0x50 [ 32.061367] kasan_set_track+0x25/0x30 [ 32.061902] __kasan_slab_alloc+0x59/0x70 [ 32.062465] kmem_cache_alloc+0x16b/0x370 [ 32.063022] vm_area_dup+0x20/0x160 [ 32.063510] __split_vma+0x170/0x950 [ 32.064010] split_vma+0xc6/0x110 [ 32.064478] mprotect_fixup+0x8d2/0xb30 [ 32.065018] do_mprotect_pkey+0x87e/0xd40 [ 32.065586] __x64_sys_mprotect+0x78/0xc0 [ 32.066148] do_syscall_64+0x3f/0x90 [ 32.066657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.067348] [ 32.067579] Freed by task 212: [ 32.067998] kasan_save_stack+0x22/0x50 [ 32.068539] kasan_set_track+0x25/0x30 [ 32.069074] kasan_save_free_info+0x2b/0x50 [ 32.069661] __kasan_slab_free+0x10a/0x190 [ 32.070235] kmem_cache_free+0x10d/0x4d0 [ 32.070786] rcu_core+0x8c8/0x2860 [ 32.071264] __do_softirq+0x1b7/0x7d4 [ 32.071774] [ 32.072006] Last potentially related work creation: [ 32.072628] kasan_save_stack+0x22/0x50 [ 32.073174] __kasan_record_aux_stack+0x8e/0xa0 [ 32.073794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.074482] remove_vma+0x139/0x170 [ 32.074968] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.075569] do_vmi_munmap+0x1f1/0x2b0 [ 32.076087] __vm_munmap+0x138/0x3a0 [ 32.076592] __x64_sys_munmap+0x59/0x80 [ 32.077129] do_syscall_64+0x3f/0x90 [ 32.077635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.078332] [ 32.078564] The buggy address belongs to the object at ffff88800e6df740 [ 32.078564] which belongs to the cache vm_area_struct of size 168 [ 32.080143] The buggy address is located 88 bytes inside of [ 32.080143] freed 168-byte region [ffff88800e6df740, ffff88800e6df7e8) [ 32.081677] [ 32.081908] The buggy address belongs to the physical page: [ 32.082614] page:00000000a6d28d1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6df [ 32.083783] memcg:ffff888006856f01 [ 32.084243] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.084945] page_type: 0xffffffff() [ 32.085429] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.086419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006856f01 [ 32.087398] page dumped because: kasan: bad access detected [ 32.088115] [ 32.088346] Memory state around the buggy address: [ 32.088964] ffff88800e6df680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.089886] ffff88800e6df700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.090801] >ffff88800e6df780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.091716] ^ [ 32.092248] ffff88800e6df800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.093203] ffff88800e6df880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.094121] ================================================================== [ 32.095335] Disabling lock debugging due to kernel taint [ 33.692916] BUG: Bad rss-counter state mm:00000000cebcbfb9 type:MM_FILEPAGES val:33 [ 33.694145] BUG: Bad rss-counter state mm:00000000cebcbfb9 type:MM_ANONPAGES val:22 [ 34.297117] BUG: Bad rss-counter state mm:00000000fab7231a type:MM_FILEPAGES val:33 [ 34.298455] BUG: Bad rss-counter state mm:00000000fab7231a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52931' (ECDSA) to the list of known hosts. 2023/06/21 10:05:41 fuzzer started 2023/06/21 10:05:41 dialing manager at localhost:36067 2023/06/21 10:05:41 checking machine... 2023/06/21 10:05:41 checking revisions... [ 35.003149] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:05:41 testing simple program... [ 35.059982] cgroup: Unknown subsys name 'net' [ 35.118864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:05:41 Registers: info registers vcpu 0 RAX=ffffea000037c500 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888014777620 RSP=ffff888014777560 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f140 R13=ffff88806ce3dc90 R14=ffff88806ce3dc90 R15=ffff88806ce3dc70 RIP=ffffffff81806fdf RFL=00000086 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f294b231900 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=000055bb3d14a818 CR3=000000000ca90000 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=a975f8a02b03604f00000000000ae988 XMM05=74008aaa2b8748580000000000132cd0 XMM06=59d5b690e0af863b0000000000131e18 XMM07=fb795ef6d65770560000000000121fb8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363d305 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001c13f1e RSI=ffff88800e09fda8 RDI=ffffffff8363d305 RBP=ffff88800e09f8f0 RSP=ffff88800e09f888 R8 =0000000000000001 R9 =ffff88800e09f8d8 R10=0000000000038001 R11=000000000009a984 R12=ffff88800e09f960 R13=0000000000000000 R14=ffff888017f10000 R15=0000000000000cc0 RIP=ffffffff811303b9 RFL=00000246 [---Z-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1ba811d900 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=00007f1ba86d2650 CR3=0000000019d14000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000