syzkaller login: [ 61.198710] BUG: Bad rss-counter state mm:0000000028dcb69f type:MM_FILEPAGES val:33 [ 61.199762] BUG: Bad rss-counter state mm:0000000028dcb69f type:MM_ANONPAGES val:22 [ 61.282214] ================================================================== [ 61.283141] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.284089] Read of size 8 at addr ffff88801acc9880 by task sshd/226 [ 61.284845] [ 61.285060] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.286007] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.287032] Call Trace: [ 61.287345] [ 61.287652] dump_stack_lvl+0x91/0xf0 [ 61.288136] print_report+0xcc/0x620 [ 61.288626] ? __virt_addr_valid+0x102/0x340 [ 61.289169] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.289774] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.290379] kasan_report+0xbe/0xf0 [ 61.290848] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.291454] vma_interval_tree_remove+0xc75/0xec0 [ 61.292066] vma_prepare+0xc54/0x11a0 [ 61.292551] __split_vma+0x5af/0x950 [ 61.293032] ? __pfx___split_vma+0x10/0x10 [ 61.293548] ? find_held_lock+0x2c/0x110 [ 61.294065] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.294623] ? lock_is_held_type+0x9f/0x120 [ 61.295171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.295778] ? mtree_range_walk+0x632/0x900 [ 61.296320] ? mas_walk+0x5c7/0x7c0 [ 61.296791] do_vmi_munmap+0x1f1/0x2b0 [ 61.297284] mmap_region+0x1f9/0x2660 [ 61.297757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.298268] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.298979] ? __pfx_lock_acquire+0x10/0x10 [ 61.299509] ? __pfx_mmap_region+0x10/0x10 [ 61.300057] ? security_mmap_addr+0x7d/0xa0 [ 61.300583] ? get_unmapped_area+0x1f5/0x3f0 [ 61.301135] do_mmap+0x854/0xf00 [ 61.301565] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.302062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.302614] ksys_mmap_pgoff+0x3af/0x500 [ 61.303118] do_syscall_64+0x3f/0x90 [ 61.303593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.304242] RIP: 0033:0x7fd1e65add82 [ 61.304688] 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 [ 61.306788] RSP: 002b:00007ffc026ba758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.307696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1e65add82 [ 61.308528] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1e59e7000 [ 61.309362] RBP: 00007fd1e59e7000 R08: 0000000000000009 R09: 0000000000001000 [ 61.310195] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b345cf5ec0 [ 61.311031] R13: 00007ffc026ba770 R14: 00007ffc026ba7a0 R15: 00007ffc026bab00 [ 61.311884] [ 61.312177] [ 61.312393] Allocated by task 219: [ 61.312830] kasan_save_stack+0x22/0x50 [ 61.313324] kasan_set_track+0x25/0x30 [ 61.313812] __kasan_slab_alloc+0x59/0x70 [ 61.314329] kmem_cache_alloc+0x16b/0x370 [ 61.314833] vm_area_dup+0x20/0x160 [ 61.315279] __split_vma+0x170/0x950 [ 61.315754] split_vma+0xc6/0x110 [ 61.316190] mprotect_fixup+0x8d2/0xb30 [ 61.316681] do_mprotect_pkey+0x87e/0xd40 [ 61.317192] __x64_sys_mprotect+0x78/0xc0 [ 61.317704] do_syscall_64+0x3f/0x90 [ 61.318174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.318804] [ 61.319013] Freed by task 219: [ 61.319404] kasan_save_stack+0x22/0x50 [ 61.319911] kasan_set_track+0x25/0x30 [ 61.320399] kasan_save_free_info+0x2b/0x50 [ 61.320921] __kasan_slab_free+0x10a/0x190 [ 61.321469] kmem_cache_free+0x10d/0x4d0 [ 61.321970] rcu_core+0x8c8/0x2860 [ 61.322408] __do_softirq+0x1b7/0x7d4 [ 61.322876] [ 61.323091] Last potentially related work creation: [ 61.323673] kasan_save_stack+0x22/0x50 [ 61.324168] __kasan_record_aux_stack+0x8e/0xa0 [ 61.324730] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.325366] remove_vma+0x139/0x170 [ 61.325810] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.326360] do_vmi_munmap+0x1f1/0x2b0 [ 61.326836] __vm_munmap+0x138/0x3a0 [ 61.327368] __x64_sys_munmap+0x59/0x80 [ 61.327866] do_syscall_64+0x3f/0x90 [ 61.328334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.328966] [ 61.329184] The buggy address belongs to the object at ffff88801acc9828 [ 61.329184] which belongs to the cache vm_area_struct of size 168 [ 61.330621] The buggy address is located 88 bytes inside of [ 61.330621] freed 168-byte region [ffff88801acc9828, ffff88801acc98d0) [ 61.331993] [ 61.332205] The buggy address belongs to the physical page: [ 61.332847] page:00000000cc52cff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1acc9 [ 61.333916] memcg:ffff88801acab601 [ 61.334331] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.334968] page_type: 0xffffffff() [ 61.335418] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.336342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801acab601 [ 61.337234] page dumped because: kasan: bad access detected [ 61.337882] [ 61.338092] Memory state around the buggy address: [ 61.338661] ffff88801acc9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.339509] ffff88801acc9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.340360] >ffff88801acc9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.341202] ^ [ 61.341606] ffff88801acc9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.342449] ffff88801acc9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.343291] ================================================================== [ 61.344201] Disabling lock debugging due to kernel taint [ 63.470783] BUG: Bad rss-counter state mm:0000000005cdb26e type:MM_FILEPAGES val:33 [ 63.472086] BUG: Bad rss-counter state mm:0000000005cdb26e type:MM_ANONPAGES val:22 [ 63.935786] BUG: Bad rss-counter state mm:0000000079d140c5 type:MM_FILEPAGES val:33 [ 63.936898] BUG: Bad rss-counter state mm:0000000079d140c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41807' (ECDSA) to the list of known hosts. 2023/06/20 13:55:49 fuzzer started 2023/06/20 13:55:50 dialing manager at localhost:36067 2023/06/20 13:55:50 checking machine... 2023/06/20 13:55:50 checking revisions... [ 64.707166] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:55:50 testing simple program... [ 64.760629] cgroup: Unknown subsys name 'net' [ 64.808399] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:55:49 Registers: info registers vcpu 0 RAX=000000003c00912a RBX=00000000b8f59262 RCX=ffff88800d8f7970 RDX=0000000000000007 RSI=0000000000000008 RDI=0000000025f5ffd5 RBP=00000000000001d0 RSP=ffff88800d8f78d0 R8 =00000000b264c774 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000800 R14=ffff88800d8f7958 R15=0000000000000007 RIP=ffffffff8227047f RFL=00000282 [--S----] 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 00007f2bf286a900 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=00007ffd9d372000 CR3=000000000de72000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007ff6865b20c0 CR3=0000000015bcc000 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=35353a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3533325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303032 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000