syzkaller login: [ 40.773908] BUG: Bad rss-counter state mm:00000000d2efa0d9 type:MM_FILEPAGES val:33 [ 40.776083] BUG: Bad rss-counter state mm:00000000d2efa0d9 type:MM_ANONPAGES val:22 [ 40.953968] ================================================================== [ 40.954955] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.955961] Read of size 8 at addr ffff8880102a0df0 by task sshd/229 [ 40.956891] [ 40.957175] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.958106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.959164] Call Trace: [ 40.959506] [ 40.959813] dump_stack_lvl+0x91/0xf0 [ 40.960371] print_report+0xcc/0x620 [ 40.960894] ? __virt_addr_valid+0x102/0x340 [ 40.961488] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.962143] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.962808] kasan_report+0xbe/0xf0 [ 40.963336] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.964019] vma_interval_tree_remove+0xc75/0xec0 [ 40.964693] vma_prepare+0xc54/0x11a0 [ 40.965219] __split_vma+0x5af/0x950 [ 40.965734] ? __pfx___split_vma+0x10/0x10 [ 40.966317] ? find_held_lock+0x2c/0x110 [ 40.966895] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.967514] ? lock_is_held_type+0x9f/0x120 [ 40.968114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.968798] ? mtree_range_walk+0x632/0x900 [ 40.969410] ? mas_walk+0x5c7/0x7c0 [ 40.969935] do_vmi_munmap+0x1f1/0x2b0 [ 40.970478] mmap_region+0x1f9/0x2660 [ 40.971017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.971588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.972402] ? __pfx_lock_acquire+0x10/0x10 [ 40.972998] ? __pfx_mmap_region+0x10/0x10 [ 40.973588] ? security_mmap_addr+0x7d/0xa0 [ 40.974179] ? get_unmapped_area+0x1f5/0x3f0 [ 40.974793] do_mmap+0x854/0xf00 [ 40.975283] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.975834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.976465] ksys_mmap_pgoff+0x3af/0x500 [ 40.977025] do_syscall_64+0x3f/0x90 [ 40.977555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.978273] RIP: 0033:0x7f46546fad82 [ 40.978778] 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 [ 40.981154] RSP: 002b:00007fffe78dfb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.982160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46546fad82 [ 40.983103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4653b34000 [ 40.984058] RBP: 00007f4653b34000 R08: 0000000000000009 R09: 0000000000001000 [ 40.985001] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556628576b20 [ 40.985945] R13: 00007fffe78dfb60 R14: 00007fffe78dfb90 R15: 00007fffe78dfef0 [ 40.986902] [ 40.987232] [ 40.987470] Allocated by task 222: [ 40.987951] kasan_save_stack+0x22/0x50 [ 40.988517] kasan_set_track+0x25/0x30 [ 40.989069] __kasan_slab_alloc+0x59/0x70 [ 40.989650] kmem_cache_alloc+0x16b/0x370 [ 40.990218] vm_area_dup+0x20/0x160 [ 40.990726] __split_vma+0x170/0x950 [ 40.991246] split_vma+0xc6/0x110 [ 40.991735] mprotect_fixup+0x8d2/0xb30 [ 40.992312] do_mprotect_pkey+0x87e/0xd40 [ 40.992889] __x64_sys_mprotect+0x78/0xc0 [ 40.993469] do_syscall_64+0x3f/0x90 [ 40.993994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.994703] [ 40.994939] Freed by task 222: [ 40.995377] kasan_save_stack+0x22/0x50 [ 40.995943] kasan_set_track+0x25/0x30 [ 40.996500] kasan_save_free_info+0x2b/0x50 [ 40.997089] __kasan_slab_free+0x10a/0x190 [ 40.997677] kmem_cache_free+0x10d/0x4d0 [ 40.998315] rcu_core+0x8c8/0x2860 [ 40.998816] __do_softirq+0x1b7/0x7d4 [ 40.999351] [ 40.999590] Last potentially related work creation: [ 41.000259] kasan_save_stack+0x22/0x50 [ 41.000815] __kasan_record_aux_stack+0x8e/0xa0 [ 41.001459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.002179] remove_vma+0x139/0x170 [ 41.002678] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.003298] do_vmi_munmap+0x1f1/0x2b0 [ 41.003839] __vm_munmap+0x138/0x3a0 [ 41.004367] __x64_sys_munmap+0x59/0x80 [ 41.004915] do_syscall_64+0x3f/0x90 [ 41.005438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.006146] [ 41.006384] The buggy address belongs to the object at ffff8880102a0d98 [ 41.006384] which belongs to the cache vm_area_struct of size 168 [ 41.008016] The buggy address is located 88 bytes inside of [ 41.008016] freed 168-byte region [ffff8880102a0d98, ffff8880102a0e40) [ 41.009585] [ 41.009825] The buggy address belongs to the physical page: [ 41.010562] page:00000000fdf70a8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a0 [ 41.011786] memcg:ffff88800b865f01 [ 41.012280] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.013008] page_type: 0xffffffff() [ 41.013511] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.014537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b865f01 [ 41.015556] page dumped because: kasan: bad access detected [ 41.016299] [ 41.016537] Memory state around the buggy address: [ 41.017180] ffff8880102a0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 41.018133] ffff8880102a0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 41.019093] >ffff8880102a0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.020034] ^ [ 41.020945] ffff8880102a0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.021904] ffff8880102a0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.022856] ================================================================== [ 41.023993] Disabling lock debugging due to kernel taint [ 43.321562] BUG: Bad rss-counter state mm:00000000b142ef2a type:MM_FILEPAGES val:33 [ 43.322793] BUG: Bad rss-counter state mm:00000000b142ef2a type:MM_ANONPAGES val:22 [ 43.744797] BUG: Bad rss-counter state mm:0000000017716100 type:MM_FILEPAGES val:33 [ 43.745859] BUG: Bad rss-counter state mm:0000000017716100 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35691' (ECDSA) to the list of known hosts. 2023/06/20 08:27:39 fuzzer started 2023/06/20 08:27:40 dialing manager at localhost:44161 2023/06/20 08:27:40 checking machine... 2023/06/20 08:27:40 checking revisions... [ 44.547151] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:27:40 testing simple program... [ 44.602465] cgroup: Unknown subsys name 'net' [ 44.674375] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:27:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7d51c08650 CR3=000000000fbac000 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=2039333a37323a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3833 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3833325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000007f0 RBX=000055614c0be750 RCX=00000000fc000000 RDX=0000000000000000 RSI=000055614c0d51e0 RDI=000055614c0c5610 RBP=000055614c0d51e0 RSP=00007ffc1b67d998 R8 =0000000000000000 R9 =000000000000001b R10=00007ffc1b67d757 R11=0000000000000000 R12=00007ffc1b67d9e0 R13=000055614c0b2ce0 R14=00007f7d516536f8 R15=000055614c0d51e0 RIP=00007f7d51ba200e RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7d51653900 00000000 00000000 GS =0000 0000000000000000 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=00007f7d51c0b0b0 CR3=000000001629c000 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=707465675f6c697475646f6d6d61705f XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000