syzkaller login: [ 226.776045] BUG: Bad rss-counter state mm:00000000f5234583 type:MM_FILEPAGES val:33 [ 226.776740] BUG: Bad rss-counter state mm:00000000f5234583 type:MM_ANONPAGES val:22 [ 226.964483] ================================================================== [ 226.965642] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 226.966870] Read of size 8 at addr ffff888019e2aed8 by task sshd/221 [ 226.967811] [ 226.968060] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 226.969259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 226.970393] Call Trace: [ 226.970753] [ 226.971071] dump_stack_lvl+0x91/0xf0 [ 226.971619] print_report+0xcc/0x620 [ 226.972182] ? __virt_addr_valid+0x102/0x340 [ 226.972795] ? vma_interval_tree_remove+0xc75/0xec0 [ 226.973573] ? vma_interval_tree_remove+0xc75/0xec0 [ 226.974332] kasan_report+0xbe/0xf0 [ 226.975034] ? vma_interval_tree_remove+0xc75/0xec0 [ 226.975859] vma_interval_tree_remove+0xc75/0xec0 [ 226.976610] vma_prepare+0xc54/0x11a0 [ 226.977201] __split_vma+0x5af/0x950 [ 226.977797] ? __pfx___split_vma+0x10/0x10 [ 226.978447] ? find_held_lock+0x2c/0x110 [ 226.979093] do_vmi_align_munmap+0x2ba/0x11f0 [ 226.979835] ? lock_is_held_type+0x9f/0x120 [ 226.980518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 226.981318] ? mtree_range_walk+0x632/0x900 [ 226.982027] ? mas_walk+0x5c7/0x7c0 [ 226.982634] do_vmi_munmap+0x1f1/0x2b0 [ 226.983249] mmap_region+0x1f9/0x2660 [ 226.983841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 226.984449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 226.985358] ? __pfx_lock_acquire+0x10/0x10 [ 226.986126] ? __pfx_mmap_region+0x10/0x10 [ 226.986782] ? security_mmap_addr+0x7d/0xa0 [ 226.987425] ? get_unmapped_area+0x1f5/0x3f0 [ 226.988131] do_mmap+0x854/0xf00 [ 226.988689] vm_mmap_pgoff+0x1a6/0x3a0 [ 226.989289] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 226.990075] ksys_mmap_pgoff+0x3af/0x500 [ 226.990732] do_syscall_64+0x3f/0x90 [ 226.991333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 226.992189] RIP: 0033:0x7f39ceae4d82 [ 226.992776] 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 [ 226.995445] RSP: 002b:00007fffd2bcf548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 226.996671] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39ceae4d82 [ 226.997794] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39cdf1e000 [ 226.998859] RBP: 00007f39cdf1e000 R08: 0000000000000009 R09: 0000000000001000 [ 226.999948] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c50be8a980 [ 227.001019] R13: 00007fffd2bcf560 R14: 00007fffd2bcf590 R15: 00007fffd2bcf8f0 [ 227.002101] [ 227.002472] [ 227.002756] Allocated by task 214: [ 227.003309] kasan_save_stack+0x22/0x50 [ 227.003974] kasan_set_track+0x25/0x30 [ 227.004608] __kasan_slab_alloc+0x59/0x70 [ 227.005242] kmem_cache_alloc+0x16b/0x370 [ 227.005872] vm_area_dup+0x20/0x160 [ 227.006418] __split_vma+0x170/0x950 [ 227.006984] split_vma+0xc6/0x110 [ 227.007505] mprotect_fixup+0x8d2/0xb30 [ 227.008182] do_mprotect_pkey+0x87e/0xd40 [ 227.009024] __x64_sys_mprotect+0x78/0xc0 [ 227.009678] do_syscall_64+0x3f/0x90 [ 227.010258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 227.011065] [ 227.011325] Freed by task 214: [ 227.011831] kasan_save_stack+0x22/0x50 [ 227.012470] kasan_set_track+0x25/0x30 [ 227.013088] kasan_save_free_info+0x2b/0x50 [ 227.013782] __kasan_slab_free+0x10a/0x190 [ 227.014450] kmem_cache_free+0x10d/0x4d0 [ 227.015133] rcu_core+0x8c8/0x2860 [ 227.015733] __do_softirq+0x1b7/0x7d4 [ 227.016324] [ 227.016621] Last potentially related work creation: [ 227.017335] kasan_save_stack+0x22/0x50 [ 227.017949] __kasan_record_aux_stack+0x8e/0xa0 [ 227.018635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 227.019558] remove_vma+0x139/0x170 [ 227.020138] do_vmi_align_munmap+0xd4a/0x11f0 [ 227.020837] do_vmi_munmap+0x1f1/0x2b0 [ 227.021452] __vm_munmap+0x138/0x3a0 [ 227.022037] __x64_sys_munmap+0x59/0x80 [ 227.022673] do_syscall_64+0x3f/0x90 [ 227.023243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 227.024076] [ 227.024337] The buggy address belongs to the object at ffff888019e2ae80 [ 227.024337] which belongs to the cache vm_area_struct of size 168 [ 227.026237] The buggy address is located 88 bytes inside of [ 227.026237] freed 168-byte region [ffff888019e2ae80, ffff888019e2af28) [ 227.028049] [ 227.028311] The buggy address belongs to the physical page: [ 227.029122] page:00000000bcd00ca8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e2a [ 227.030617] memcg:ffff888016456a01 [ 227.031137] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 227.032031] page_type: 0xffffffff() [ 227.032598] raw: 0100000000000200 ffff88800879fc80 ffffea0000330d00 dead000000000003 [ 227.033765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016456a01 [ 227.034909] page dumped because: kasan: bad access detected [ 227.035759] [ 227.036021] Memory state around the buggy address: [ 227.036754] ffff888019e2ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 227.037834] ffff888019e2ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 227.038932] >ffff888019e2ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 227.040146] ^ [ 227.041079] ffff888019e2af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 227.042188] ffff888019e2af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 227.043455] ================================================================== [ 227.045140] Disabling lock debugging due to kernel taint [ 229.333871] BUG: Bad rss-counter state mm:0000000051ab7b7d type:MM_FILEPAGES val:33 [ 229.335048] BUG: Bad rss-counter state mm:0000000051ab7b7d type:MM_ANONPAGES val:22 [ 229.881078] BUG: Bad rss-counter state mm:000000001dfd9b1d type:MM_FILEPAGES val:33 [ 229.882250] BUG: Bad rss-counter state mm:000000001dfd9b1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23340' (ECDSA) to the list of known hosts. 2023/06/19 20:40:39 fuzzer started 2023/06/19 20:40:39 dialing manager at localhost:44161 2023/06/19 20:40:39 checking machine... 2023/06/19 20:40:39 checking revisions... [ 230.491516] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:40:39 testing simple program... [ 230.554124] cgroup: Unknown subsys name 'net' [ 230.592859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:37:23 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=00007f0cd6b4acb0 CR3=0000000016b32000 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=30343a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303436 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=dffffc0000000000 RBX=ffffffff813ad6d0 RCX=ffff88801467f178 RDX=1ffff110028cfe26 RSI=ffff88801467f170 RDI=ffffffff813ad6d0 RBP=ffff88801467f130 RSP=ffff88801467f0a8 R8 =0000000000000001 R9 =ffff88801467f118 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801467f1a0 R13=0000000000000000 R14=ffff88800f701b40 R15=ffff88800d0f5260 RIP=ffffffff811fc7a0 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 00007fe3719bc900 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=00007fe371986008 CR3=000000001c5b6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000