syzkaller login: [ 40.819094] BUG: Bad rss-counter state mm:0000000003353eed type:MM_FILEPAGES val:33 [ 40.820652] BUG: Bad rss-counter state mm:0000000003353eed type:MM_ANONPAGES val:22 [ 40.995291] ================================================================== [ 40.996388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.997525] Read of size 8 at addr ffff88800e34b880 by task sshd/224 [ 40.998393] [ 40.998628] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.999519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.000550] Call Trace: [ 41.000874] [ 41.001168] dump_stack_lvl+0x91/0xf0 [ 41.001674] print_report+0xcc/0x620 [ 41.002176] ? __virt_addr_valid+0x102/0x340 [ 41.002771] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.003419] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.004074] kasan_report+0xbe/0xf0 [ 41.004571] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.005206] vma_interval_tree_remove+0xc75/0xec0 [ 41.005833] vma_prepare+0xc54/0x11a0 [ 41.006330] __split_vma+0x5af/0x950 [ 41.006823] ? __pfx___split_vma+0x10/0x10 [ 41.007370] ? find_held_lock+0x2c/0x110 [ 41.007934] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.008541] ? lock_is_held_type+0x9f/0x120 [ 41.009117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.009788] ? mtree_range_walk+0x632/0x900 [ 41.010384] ? mas_walk+0x5c7/0x7c0 [ 41.010963] do_vmi_munmap+0x1f1/0x2b0 [ 41.011495] mmap_region+0x1f9/0x2660 [ 41.012065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.012626] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.013404] ? __pfx_lock_acquire+0x10/0x10 [ 41.013990] ? __pfx_mmap_region+0x10/0x10 [ 41.014572] ? security_mmap_addr+0x7d/0xa0 [ 41.015151] ? get_unmapped_area+0x1f5/0x3f0 [ 41.015780] do_mmap+0x854/0xf00 [ 41.016260] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.016799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.017411] ksys_mmap_pgoff+0x3af/0x500 [ 41.017954] do_syscall_64+0x3f/0x90 [ 41.018476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.019189] RIP: 0033:0x7f0eec6b0d82 [ 41.019710] 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 [ 41.022083] RSP: 002b:00007ffd09784aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.023094] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0eec6b0d82 [ 41.024056] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0eebaea000 [ 41.025007] RBP: 00007f0eebaea000 R08: 0000000000000009 R09: 0000000000001000 [ 41.025952] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e020aeec0 [ 41.026903] R13: 00007ffd09784ac0 R14: 00007ffd09784af0 R15: 00007ffd09784e50 [ 41.027887] [ 41.028212] [ 41.028453] Allocated by task 217: [ 41.028930] kasan_save_stack+0x22/0x50 [ 41.029492] kasan_set_track+0x25/0x30 [ 41.030039] __kasan_slab_alloc+0x59/0x70 [ 41.030629] kmem_cache_alloc+0x16b/0x370 [ 41.031197] vm_area_dup+0x20/0x160 [ 41.031711] __split_vma+0x170/0x950 [ 41.032229] split_vma+0xc6/0x110 [ 41.032718] mprotect_fixup+0x8d2/0xb30 [ 41.033273] do_mprotect_pkey+0x87e/0xd40 [ 41.033854] __x64_sys_mprotect+0x78/0xc0 [ 41.034438] do_syscall_64+0x3f/0x90 [ 41.034967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.035710] [ 41.035945] Freed by task 204: [ 41.036372] kasan_save_stack+0x22/0x50 [ 41.036928] kasan_set_track+0x25/0x30 [ 41.037482] kasan_save_free_info+0x2b/0x50 [ 41.038073] __kasan_slab_free+0x10a/0x190 [ 41.038662] kmem_cache_free+0x10d/0x4d0 [ 41.039226] rcu_core+0x8c8/0x2860 [ 41.039742] __do_softirq+0x1b7/0x7d4 [ 41.040279] [ 41.040516] Last potentially related work creation: [ 41.041163] kasan_save_stack+0x22/0x50 [ 41.041728] __kasan_record_aux_stack+0x8e/0xa0 [ 41.042371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.043089] remove_vma+0x139/0x170 [ 41.043618] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.044243] do_vmi_munmap+0x1f1/0x2b0 [ 41.044787] __vm_munmap+0x138/0x3a0 [ 41.045311] __x64_sys_munmap+0x59/0x80 [ 41.045865] do_syscall_64+0x3f/0x90 [ 41.046386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.047091] [ 41.047329] The buggy address belongs to the object at ffff88800e34b828 [ 41.047329] which belongs to the cache vm_area_struct of size 168 [ 41.048984] The buggy address is located 88 bytes inside of [ 41.048984] freed 168-byte region [ffff88800e34b828, ffff88800e34b8d0) [ 41.050557] [ 41.050796] The buggy address belongs to the physical page: [ 41.051534] page:000000009dbe3c64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe34b [ 41.052757] memcg:ffff88800d2ee101 [ 41.053233] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.054012] page_type: 0xffffffff() [ 41.054511] raw: 0100000000000200 ffff88800879fc80 ffffea000051c500 dead000000000003 [ 41.055535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2ee101 [ 41.056555] page dumped because: kasan: bad access detected [ 41.057263] [ 41.057499] Memory state around the buggy address: [ 41.058127] ffff88800e34b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.059046] ffff88800e34b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.059989] >ffff88800e34b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.060916] ^ [ 41.061371] ffff88800e34b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.062305] ffff88800e34b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 41.063216] ================================================================== [ 41.064367] Disabling lock debugging due to kernel taint [ 43.057411] BUG: Bad rss-counter state mm:000000005c45c744 type:MM_FILEPAGES val:33 [ 43.059233] BUG: Bad rss-counter state mm:000000005c45c744 type:MM_ANONPAGES val:22 [ 43.583379] BUG: Bad rss-counter state mm:000000004741de53 type:MM_FILEPAGES val:33 [ 43.584395] BUG: Bad rss-counter state mm:000000004741de53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64178' (ECDSA) to the list of known hosts. 2023/06/19 19:38:38 fuzzer started 2023/06/19 19:38:38 dialing manager at localhost:44161 2023/06/19 19:38:38 checking machine... 2023/06/19 19:38:38 checking revisions... [ 44.316243] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:38:38 testing simple program... [ 44.370108] cgroup: Unknown subsys name 'net' [ 44.435254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:38:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ff07938 RCX=ffffffff860d6801 RDX=1ffff11001fe0f35 RSI=ffffffff8180c522 RDI=ffff88800ff07944 RBP=ffff88800ff079a8 RSP=ffff88800ff07850 R8 =ffffffff860d68fa R9 =ffff88800ff078b0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800ff07938 R13=0000000000000000 R14=ffff88800fea51c0 R15=ffff88801629e918 RIP=ffffffff813ad4f9 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 00007fbca9889900 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=00007ffeb7a29000 CR3=000000000caec000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f6dfb5e5e60 CR3=0000000015ce8000 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=2037333a38333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a38333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000