syzkaller login: [ 38.767207] BUG: Bad rss-counter state mm:000000002bb7ad47 type:MM_FILEPAGES val:33 [ 38.768229] BUG: Bad rss-counter state mm:000000002bb7ad47 type:MM_ANONPAGES val:22 [ 38.806905] ================================================================== [ 38.807905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.809056] Read of size 8 at addr ffff888009433798 by task sshd/218 [ 38.810023] [ 38.810242] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.811212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.812385] Call Trace: [ 38.812710] [ 38.813085] dump_stack_lvl+0x91/0xf0 [ 38.813689] print_report+0xcc/0x620 [ 38.814174] ? __virt_addr_valid+0x102/0x340 [ 38.814835] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.815525] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.816146] kasan_report+0xbe/0xf0 [ 38.816764] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.817381] vma_interval_tree_remove+0xc75/0xec0 [ 38.817982] vma_prepare+0xc54/0x11a0 [ 38.818458] __split_vma+0x5af/0x950 [ 38.818927] ? __pfx___split_vma+0x10/0x10 [ 38.819448] ? find_held_lock+0x2c/0x110 [ 38.819968] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.820560] ? lock_is_held_type+0x9f/0x120 [ 38.821097] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.821704] ? mtree_range_walk+0x632/0x900 [ 38.822259] ? mas_walk+0x5c7/0x7c0 [ 38.822742] do_vmi_munmap+0x1f1/0x2b0 [ 38.823230] mmap_region+0x1f9/0x2660 [ 38.823710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.824223] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.824934] ? __pfx_lock_acquire+0x10/0x10 [ 38.825462] ? __pfx_mmap_region+0x10/0x10 [ 38.825993] ? security_mmap_addr+0x7d/0xa0 [ 38.826514] ? get_unmapped_area+0x1f5/0x3f0 [ 38.827057] do_mmap+0x854/0xf00 [ 38.827490] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.827977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.828543] ksys_mmap_pgoff+0x3af/0x500 [ 38.829048] do_syscall_64+0x3f/0x90 [ 38.829520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.830163] RIP: 0033:0x7f7d1d7ffd82 [ 38.830613] 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 [ 38.832708] RSP: 002b:00007ffe14188ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.833601] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d1d7ffd82 [ 38.834437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d1cc39000 [ 38.835273] RBP: 00007f7d1cc39000 R08: 0000000000000009 R09: 0000000000001000 [ 38.836107] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8490a6b20 [ 38.836954] R13: 00007ffe14188f00 R14: 00007ffe14188f30 R15: 00007ffe14189290 [ 38.837797] [ 38.838090] [ 38.838305] Allocated by task 211: [ 38.838734] kasan_save_stack+0x22/0x50 [ 38.839236] kasan_set_track+0x25/0x30 [ 38.839727] __kasan_slab_alloc+0x59/0x70 [ 38.840258] kmem_cache_alloc+0x16b/0x370 [ 38.840773] vm_area_dup+0x20/0x160 [ 38.841227] __split_vma+0x170/0x950 [ 38.841697] split_vma+0xc6/0x110 [ 38.842137] mprotect_fixup+0x8d2/0xb30 [ 38.842639] do_mprotect_pkey+0x87e/0xd40 [ 38.843163] __x64_sys_mprotect+0x78/0xc0 [ 38.843683] do_syscall_64+0x3f/0x90 [ 38.844175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.844818] [ 38.845030] Freed by task 211: [ 38.845422] kasan_save_stack+0x22/0x50 [ 38.845924] kasan_set_track+0x25/0x30 [ 38.846417] kasan_save_free_info+0x2b/0x50 [ 38.846948] __kasan_slab_free+0x10a/0x190 [ 38.847485] kmem_cache_free+0x10d/0x4d0 [ 38.848001] rcu_core+0x8c8/0x2860 [ 38.848460] __do_softirq+0x1b7/0x7d4 [ 38.848944] [ 38.849160] Last potentially related work creation: [ 38.849741] kasan_save_stack+0x22/0x50 [ 38.850241] __kasan_record_aux_stack+0x8e/0xa0 [ 38.850815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.851460] remove_vma+0x139/0x170 [ 38.851912] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.852593] do_vmi_munmap+0x1f1/0x2b0 [ 38.853081] __vm_munmap+0x138/0x3a0 [ 38.853561] __x64_sys_munmap+0x59/0x80 [ 38.854060] do_syscall_64+0x3f/0x90 [ 38.854541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.855189] [ 38.855403] Second to last potentially related work creation: [ 38.856087] kasan_save_stack+0x22/0x50 [ 38.856600] __kasan_record_aux_stack+0x8e/0xa0 [ 38.857170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.857811] remove_vma+0x139/0x170 [ 38.858276] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.858830] do_vmi_munmap+0x1f1/0x2b0 [ 38.859334] __vm_munmap+0x138/0x3a0 [ 38.859801] __x64_sys_munmap+0x59/0x80 [ 38.860316] do_syscall_64+0x3f/0x90 [ 38.860792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.861430] [ 38.861645] The buggy address belongs to the object at ffff888009433740 [ 38.861645] which belongs to the cache vm_area_struct of size 168 [ 38.863121] The buggy address is located 88 bytes inside of [ 38.863121] freed 168-byte region [ffff888009433740, ffff8880094337e8) [ 38.864555] [ 38.864769] The buggy address belongs to the physical page: [ 38.865438] page:000000001b184785 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9433 [ 38.866523] memcg:ffff88800964c801 [ 38.866953] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.867599] page_type: 0xffffffff() [ 38.868047] raw: 0100000000000200 ffff8880087a0c80 ffffea000026a3c0 dead000000000002 [ 38.868978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800964c801 [ 38.869878] page dumped because: kasan: bad access detected [ 38.870528] [ 38.870743] Memory state around the buggy address: [ 38.871322] ffff888009433680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.872191] ffff888009433700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.873041] >ffff888009433780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.873890] ^ [ 38.874386] ffff888009433800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.875240] ffff888009433880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.876091] ================================================================== [ 38.877128] Disabling lock debugging due to kernel taint [ 40.901684] BUG: Bad rss-counter state mm:0000000065598d5f type:MM_FILEPAGES val:33 [ 40.903076] BUG: Bad rss-counter state mm:0000000065598d5f type:MM_ANONPAGES val:22 [ 41.341819] BUG: Bad rss-counter state mm:0000000007f89bc4 type:MM_FILEPAGES val:33 [ 41.342994] BUG: Bad rss-counter state mm:0000000007f89bc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34007' (ECDSA) to the list of known hosts. 2023/06/20 21:06:57 fuzzer started 2023/06/20 21:06:58 dialing manager at localhost:36067 2023/06/20 21:06:58 checking machine... 2023/06/20 21:06:58 checking revisions... [ 42.110428] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:06:58 testing simple program... [ 42.150884] cgroup: Unknown subsys name 'net' [ 42.202326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:06:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d2c0f80 RCX=ffff8880084413c0 RDX=ffffea000034b000 RSI=ffff88800d1c0640 RDI=ffff8880087b23c0 RBP=0000000000000000 RSP=ffff888018d37c98 R8 =ffff88800d2c0ec0 R9 =0000000000000000 R10=ffffea0000347000 R11=000000000080003d R12=dffffc0000000000 R13=ffff888018d37cd8 R14=ffff8880084413c0 R15=ffff88800d1c0640 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007ff8ead13900 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=000055c5e234c954 CR3=0000000018eb6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007f9e1dd5f030 CR3=00000000102a0000 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=2037353a36303a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36303a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000