syzkaller login: [ 30.927732] BUG: Bad rss-counter state mm:0000000045583f0d type:MM_FILEPAGES val:33 [ 30.929002] BUG: Bad rss-counter state mm:0000000045583f0d type:MM_ANONPAGES val:22 [ 30.965460] ================================================================== [ 30.966411] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.967324] Read of size 8 at addr ffff88800f763df0 by task sshd/219 [ 30.968180] [ 30.968394] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.969239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.970228] Call Trace: [ 30.970544] <TASK> [ 30.970833] dump_stack_lvl+0x91/0xf0 [ 30.971324] print_report+0xcc/0x620 [ 30.971803] ? __virt_addr_valid+0x102/0x340 [ 30.972353] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.972969] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.973580] kasan_report+0xbe/0xf0 [ 30.974045] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.974705] vma_interval_tree_remove+0xc75/0xec0 [ 30.975301] vma_prepare+0xc54/0x11a0 [ 30.975775] __split_vma+0x5af/0x950 [ 30.976244] ? __pfx___split_vma+0x10/0x10 [ 30.976764] ? find_held_lock+0x2c/0x110 [ 30.977279] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.977836] ? lock_is_held_type+0x9f/0x120 [ 30.978386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.978992] ? mtree_range_walk+0x632/0x900 [ 30.979538] ? mas_walk+0x5c7/0x7c0 [ 30.980012] do_vmi_munmap+0x1f1/0x2b0 [ 30.980501] mmap_region+0x1f9/0x2660 [ 30.980980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.981490] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.982198] ? __pfx_lock_acquire+0x10/0x10 [ 30.982728] ? __pfx_mmap_region+0x10/0x10 [ 30.983250] ? security_mmap_addr+0x7d/0xa0 [ 30.983773] ? get_unmapped_area+0x1f5/0x3f0 [ 30.984313] do_mmap+0x854/0xf00 [ 30.984743] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.985246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.985803] ksys_mmap_pgoff+0x3af/0x500 [ 30.986323] do_syscall_64+0x3f/0x90 [ 30.986800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987439] RIP: 0033:0x7fca40fb3d82 [ 30.987886] 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 [ 30.989980] RSP: 002b:00007ffd2ce60e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.990878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca40fb3d82 [ 30.991723] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca403ed000 [ 30.992552] RBP: 00007fca403ed000 R08: 0000000000000009 R09: 0000000000001000 [ 30.993402] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562beec3df70 [ 30.994272] R13: 00007ffd2ce60e70 R14: 00007ffd2ce60ea0 R15: 00007ffd2ce61200 [ 30.995133] </TASK> [ 30.995421] [ 30.995637] Allocated by task 212: [ 30.996063] kasan_save_stack+0x22/0x50 [ 30.996560] kasan_set_track+0x25/0x30 [ 30.997046] __kasan_slab_alloc+0x59/0x70 [ 30.997564] kmem_cache_alloc+0x16b/0x370 [ 30.998075] vm_area_dup+0x20/0x160 [ 30.998548] __split_vma+0x170/0x950 [ 30.999013] split_vma+0xc6/0x110 [ 30.999452] mprotect_fixup+0x8d2/0xb30 [ 30.999952] do_mprotect_pkey+0x87e/0xd40 [ 31.000470] __x64_sys_mprotect+0x78/0xc0 [ 31.000984] do_syscall_64+0x3f/0x90 [ 31.001460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.002110] [ 31.002342] Freed by task 212: [ 31.002739] kasan_save_stack+0x22/0x50 [ 31.003241] kasan_set_track+0x25/0x30 [ 31.003725] kasan_save_free_info+0x2b/0x50 [ 31.004251] __kasan_slab_free+0x10a/0x190 [ 31.004776] kmem_cache_free+0x10d/0x4d0 [ 31.005287] rcu_core+0x8c8/0x2860 [ 31.005734] __do_softirq+0x1b7/0x7d4 [ 31.006220] [ 31.006433] Last potentially related work creation: [ 31.007011] kasan_save_stack+0x22/0x50 [ 31.007504] __kasan_record_aux_stack+0x8e/0xa0 [ 31.008067] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.008698] remove_vma+0x139/0x170 [ 31.009144] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.009689] do_vmi_munmap+0x1f1/0x2b0 [ 31.010179] __vm_munmap+0x138/0x3a0 [ 31.010640] __x64_sys_munmap+0x59/0x80 [ 31.011129] do_syscall_64+0x3f/0x90 [ 31.011597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.012227] [ 31.012439] The buggy address belongs to the object at ffff88800f763d98 [ 31.012439] which belongs to the cache vm_area_struct of size 168 [ 31.013885] The buggy address is located 88 bytes inside of [ 31.013885] freed 168-byte region [ffff88800f763d98, ffff88800f763e40) [ 31.015289] [ 31.015502] The buggy address belongs to the physical page: [ 31.016159] page:00000000fe127098 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf763 [ 31.017239] memcg:ffff8880180a1e01 [ 31.017666] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.018309] page_type: 0xffffffff() [ 31.018758] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.019662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180a1e01 [ 31.020558] page dumped because: kasan: bad access detected [ 31.021205] [ 31.021419] Memory state around the buggy address: [ 31.021993] ffff88800f763c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.022846] ffff88800f763d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.023682] >ffff88800f763d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.024519] ^ [ 31.025318] ffff88800f763e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.026176] ffff88800f763e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.027016] ================================================================== [ 31.028128] Disabling lock debugging due to kernel taint [ 33.423618] BUG: Bad rss-counter state mm:00000000cc5e1c3e type:MM_FILEPAGES val:33 [ 33.424847] BUG: Bad rss-counter state mm:00000000cc5e1c3e type:MM_ANONPAGES val:22 [ 33.906675] BUG: Bad rss-counter state mm:00000000b1ea484e type:MM_FILEPAGES val:33 [ 33.907832] BUG: Bad rss-counter state mm:00000000b1ea484e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61705' (ECDSA) to the list of known hosts. 2023/06/20 18:17:36 fuzzer started 2023/06/20 18:17:36 dialing manager at localhost:36067 2023/06/20 18:17:36 checking machine... 2023/06/20 18:17:36 checking revisions... [ 34.514911] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:17:37 testing simple program... [ 34.563019] cgroup: Unknown subsys name 'net' [ 34.597356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:17:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f08476f00b0 CR3=000000000da60000 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=37313a3831203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff844a5103 RDX=ffff888019358000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800edc4c08 RSP=ffff888016f87ce0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000007 R13=ffff8880147e12c0 R14=00007f0847c6f000 R15=00007f0847cd7fff RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0847138900 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=00007f0847c8c044 CR3=000000001bed6000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c6106406d7224740f322e322e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000