syzkaller login: [ 38.718170] BUG: Bad rss-counter state mm:000000005f1a271a type:MM_FILEPAGES val:33 [ 38.719395] BUG: Bad rss-counter state mm:000000005f1a271a type:MM_ANONPAGES val:22 [ 38.754345] ================================================================== [ 38.755148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.755899] Read of size 8 at addr ffff888010095ed8 by task sshd/219 [ 38.756526] [ 38.756700] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.757398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.758184] Call Trace: [ 38.758440] <TASK> [ 38.758670] dump_stack_lvl+0x91/0xf0 [ 38.759070] print_report+0xcc/0x620 [ 38.759455] ? __virt_addr_valid+0x102/0x340 [ 38.759899] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.760400] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.760893] kasan_report+0xbe/0xf0 [ 38.761271] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.761779] vma_interval_tree_remove+0xc75/0xec0 [ 38.762268] vma_prepare+0xc54/0x11a0 [ 38.762658] __split_vma+0x5af/0x950 [ 38.763037] ? __pfx___split_vma+0x10/0x10 [ 38.763462] ? find_held_lock+0x2c/0x110 [ 38.763882] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.764355] ? lock_is_held_type+0x9f/0x120 [ 38.764790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.765281] ? mtree_range_walk+0x632/0x900 [ 38.765721] ? mas_walk+0x5c7/0x7c0 [ 38.766108] do_vmi_munmap+0x1f1/0x2b0 [ 38.766503] mmap_region+0x1f9/0x2660 [ 38.766889] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.767299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.767884] ? __pfx_lock_acquire+0x10/0x10 [ 38.768324] ? __pfx_mmap_region+0x10/0x10 [ 38.768759] ? security_mmap_addr+0x7d/0xa0 [ 38.769194] ? get_unmapped_area+0x1f5/0x3f0 [ 38.769685] do_mmap+0x854/0xf00 [ 38.770099] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.770536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.770944] ksys_mmap_pgoff+0x3af/0x500 [ 38.771313] do_syscall_64+0x3f/0x90 [ 38.771671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.772149] RIP: 0033:0x7f19423e7d82 [ 38.772510] 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 [ 38.774256] RSP: 002b:00007fffef341f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.775055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19423e7d82 [ 38.775776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1941821000 [ 38.776534] RBP: 00007f1941821000 R08: 0000000000000009 R09: 0000000000001000 [ 38.777248] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bb0be5d90 [ 38.777948] R13: 00007fffef341f40 R14: 00007fffef341f70 R15: 00007fffef3422d0 [ 38.778581] </TASK> [ 38.778805] [ 38.778963] Allocated by task 212: [ 38.779291] kasan_save_stack+0x22/0x50 [ 38.779688] kasan_set_track+0x25/0x30 [ 38.780057] __kasan_slab_alloc+0x59/0x70 [ 38.780460] kmem_cache_alloc+0x16b/0x370 [ 38.780845] vm_area_dup+0x20/0x160 [ 38.781196] __split_vma+0x170/0x950 [ 38.781554] split_vma+0xc6/0x110 [ 38.781888] mprotect_fixup+0x8d2/0xb30 [ 38.782258] do_mprotect_pkey+0x87e/0xd40 [ 38.782663] __x64_sys_mprotect+0x78/0xc0 [ 38.783065] do_syscall_64+0x3f/0x90 [ 38.783424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.784047] [ 38.784225] Freed by task 13: [ 38.784519] kasan_save_stack+0x22/0x50 [ 38.784904] kasan_set_track+0x25/0x30 [ 38.785277] kasan_save_free_info+0x2b/0x50 [ 38.785663] __kasan_slab_free+0x10a/0x190 [ 38.786083] kmem_cache_free+0x10d/0x4d0 [ 38.786460] rcu_core+0x8c8/0x2860 [ 38.786793] __do_softirq+0x1b7/0x7d4 [ 38.787135] [ 38.787295] Last potentially related work creation: [ 38.787703] kasan_save_stack+0x22/0x50 [ 38.788058] __kasan_record_aux_stack+0x8e/0xa0 [ 38.788474] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.788923] remove_vma+0x139/0x170 [ 38.789251] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.789674] do_vmi_munmap+0x1f1/0x2b0 [ 38.790035] __vm_munmap+0x138/0x3a0 [ 38.790372] __x64_sys_munmap+0x59/0x80 [ 38.790724] do_syscall_64+0x3f/0x90 [ 38.791060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.791508] [ 38.791661] Second to last potentially related work creation: [ 38.792136] kasan_save_stack+0x22/0x50 [ 38.792515] __kasan_record_aux_stack+0x8e/0xa0 [ 38.792940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.793433] remove_vma+0x139/0x170 [ 38.793783] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.794196] do_vmi_munmap+0x1f1/0x2b0 [ 38.794564] mmap_region+0x1f9/0x2660 [ 38.794940] do_mmap+0x854/0xf00 [ 38.795266] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.795636] ksys_mmap_pgoff+0x3af/0x500 [ 38.796015] do_syscall_64+0x3f/0x90 [ 38.796393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.796868] [ 38.797023] The buggy address belongs to the object at ffff888010095e80 [ 38.797023] which belongs to the cache vm_area_struct of size 168 [ 38.798040] The buggy address is located 88 bytes inside of [ 38.798040] freed 168-byte region [ffff888010095e80, ffff888010095f28) [ 38.799028] [ 38.799182] The buggy address belongs to the physical page: [ 38.799641] page:000000002580f09a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10095 [ 38.800431] memcg:ffff88800cfc8301 [ 38.800731] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.801183] page_type: 0xffffffff() [ 38.801504] raw: 0100000000000200 ffff8880087a0c80 ffffea00003850c0 dead000000000008 [ 38.802149] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfc8301 [ 38.802787] page dumped because: kasan: bad access detected [ 38.803245] [ 38.803403] Memory state around the buggy address: [ 38.803818] ffff888010095d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.804432] ffff888010095e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.805036] >ffff888010095e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.805638] ^ [ 38.806146] ffff888010095f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.806752] ffff888010095f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.807347] ================================================================== [ 38.808131] Disabling lock debugging due to kernel taint [ 41.294577] BUG: Bad rss-counter state mm:000000000c22e10e type:MM_FILEPAGES val:33 [ 41.295374] BUG: Bad rss-counter state mm:000000000c22e10e type:MM_ANONPAGES val:22 [ 41.830524] BUG: Bad rss-counter state mm:000000004c513073 type:MM_FILEPAGES val:33 [ 41.831817] BUG: Bad rss-counter state mm:000000004c513073 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39679' (ECDSA) to the list of known hosts. 2023/06/20 13:03:25 fuzzer started 2023/06/20 13:03:25 dialing manager at localhost:36067 2023/06/20 13:03:25 checking machine... 2023/06/20 13:03:25 checking revisions... [ 42.369680] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:03:25 testing simple program... [ 42.411897] cgroup: Unknown subsys name 'net' [ 42.454513] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:03:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801687ac88 RCX=ffffffff818e369f RDX=1ffff1100283940a RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880141af830 RSP=ffff8880141af7f8 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=0000000000000001 R12=0000000070810000 R13=ffff88800d5e21a0 R14=0000000000000000 R15=ffffffff856f0da0 RIP=ffffffff814c0438 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 00007f51375a7900 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=00007f5136ac6000 CR3=000000000ca46000 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=37364cba8d902b6900000000000ae988 XMM05=762e1776e7fdcd6d0000000000133e70 XMM06=dfcdbad4f1609c3700000000001329f0 XMM07=fb795ef6d657705600000000001219c0 XMM08=4f5453444600273d67736d000d0a0920 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=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=00007f0d929d9618 CR3=000000000e09e000 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=2035323a33303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a33303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000