syzkaller login: [ 38.821911] BUG: Bad rss-counter state mm:00000000c1c9a58a type:MM_FILEPAGES val:33 [ 38.822712] BUG: Bad rss-counter state mm:00000000c1c9a58a type:MM_ANONPAGES val:22 [ 38.947898] ================================================================== [ 38.948596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.949250] Read of size 8 at addr ffff88800fded4e0 by task sshd/218 [ 38.949795] [ 38.949955] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.950578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.951258] Call Trace: [ 38.951485] [ 38.951709] dump_stack_lvl+0x91/0xf0 [ 38.952219] print_report+0xcc/0x620 [ 38.952581] ? __virt_addr_valid+0x102/0x340 [ 38.952973] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.953419] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.953862] kasan_report+0xbe/0xf0 [ 38.954201] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954661] vma_interval_tree_remove+0xc75/0xec0 [ 38.955103] vma_prepare+0xc54/0x11a0 [ 38.955448] __split_vma+0x5af/0x950 [ 38.955824] ? __pfx___split_vma+0x10/0x10 [ 38.956216] ? find_held_lock+0x2c/0x110 [ 38.956590] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.956991] ? lock_is_held_type+0x9f/0x120 [ 38.957379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.957826] ? mtree_range_walk+0x632/0x900 [ 38.958236] ? mas_walk+0x5c7/0x7c0 [ 38.958583] do_vmi_munmap+0x1f1/0x2b0 [ 38.958934] mmap_region+0x1f9/0x2660 [ 38.959279] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.959674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.960185] ? __pfx_lock_acquire+0x10/0x10 [ 38.960566] ? __pfx_mmap_region+0x10/0x10 [ 38.960940] ? security_mmap_addr+0x7d/0xa0 [ 38.961319] ? get_unmapped_area+0x1f5/0x3f0 [ 38.961709] do_mmap+0x854/0xf00 [ 38.962024] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.962374] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.962772] ksys_mmap_pgoff+0x3af/0x500 [ 38.963133] do_syscall_64+0x3f/0x90 [ 38.963487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963965] RIP: 0033:0x7f3ef9562d82 [ 38.964322] 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 [ 38.965867] RSP: 002b:00007ffc66c4ac28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.966531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ef9562d82 [ 38.967138] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ef899c000 [ 38.967797] RBP: 00007f3ef899c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.968420] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b875afec0 [ 38.969014] R13: 00007ffc66c4ac40 R14: 00007ffc66c4ac70 R15: 00007ffc66c4afd0 [ 38.969629] [ 38.969834] [ 38.969991] Allocated by task 211: [ 38.970295] kasan_save_stack+0x22/0x50 [ 38.970657] kasan_set_track+0x25/0x30 [ 38.971005] __kasan_slab_alloc+0x59/0x70 [ 38.971372] kmem_cache_alloc+0x16b/0x370 [ 38.971748] vm_area_dup+0x20/0x160 [ 38.972065] __split_vma+0x170/0x950 [ 38.972400] split_vma+0xc6/0x110 [ 38.972712] mprotect_fixup+0x8d2/0xb30 [ 38.973063] do_mprotect_pkey+0x87e/0xd40 [ 38.973428] __x64_sys_mprotect+0x78/0xc0 [ 38.973792] do_syscall_64+0x3f/0x90 [ 38.974129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.974579] [ 38.974729] Freed by task 211: [ 38.975003] kasan_save_stack+0x22/0x50 [ 38.975359] kasan_set_track+0x25/0x30 [ 38.975746] kasan_save_free_info+0x2b/0x50 [ 38.976122] __kasan_slab_free+0x10a/0x190 [ 38.976496] kmem_cache_free+0x10d/0x4d0 [ 38.976851] rcu_core+0x8c8/0x2860 [ 38.977171] __do_softirq+0x1b7/0x7d4 [ 38.977667] [ 38.977823] Last potentially related work creation: [ 38.978258] kasan_save_stack+0x22/0x50 [ 38.978637] __kasan_record_aux_stack+0x8e/0xa0 [ 38.979067] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.979606] remove_vma+0x139/0x170 [ 38.979946] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.980354] do_vmi_munmap+0x1f1/0x2b0 [ 38.980716] __vm_munmap+0x138/0x3a0 [ 38.981069] __x64_sys_munmap+0x59/0x80 [ 38.981438] do_syscall_64+0x3f/0x90 [ 38.981793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982270] [ 38.982424] The buggy address belongs to the object at ffff88800fded488 [ 38.982424] which belongs to the cache vm_area_struct of size 168 [ 38.983530] The buggy address is located 88 bytes inside of [ 38.983530] freed 168-byte region [ffff88800fded488, ffff88800fded530) [ 38.984589] [ 38.984760] The buggy address belongs to the physical page: [ 38.985251] page:00000000c8dab9d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfded [ 38.986048] memcg:ffff88800d957c01 [ 38.986381] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.986852] page_type: 0xffffffff() [ 38.987180] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.987888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d957c01 [ 38.988560] page dumped because: kasan: bad access detected [ 38.989046] [ 38.989202] Memory state around the buggy address: [ 38.989628] ffff88800fded380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.990256] ffff88800fded400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.990879] >ffff88800fded480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.991530] ^ [ 38.992099] ffff88800fded500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.992755] ffff88800fded580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.993400] ================================================================== [ 38.994308] Disabling lock debugging due to kernel taint [ 40.892324] BUG: Bad rss-counter state mm:00000000b8ea81ff type:MM_FILEPAGES val:33 [ 40.893054] BUG: Bad rss-counter state mm:00000000b8ea81ff type:MM_ANONPAGES val:22 [ 41.262704] BUG: Bad rss-counter state mm:000000005db7e41e type:MM_FILEPAGES val:33 [ 41.263638] BUG: Bad rss-counter state mm:000000005db7e41e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20187' (ECDSA) to the list of known hosts. 2023/06/21 09:15:58 fuzzer started 2023/06/21 09:15:58 dialing manager at localhost:36067 2023/06/21 09:15:58 checking machine... 2023/06/21 09:15:58 checking revisions... [ 41.863868] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:15:58 testing simple program... [ 41.901396] cgroup: Unknown subsys name 'net' [ 41.948528] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:15:58 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000b14edd89 RCX=ffff88806cb6ec48 RDX=0000000000000010 RSI=0000000000000002 RDI=00000000947496e2 RBP=ffff88800c9b48d0 RSP=ffff8880191cf4b8 R8 =000000009d3351c4 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff8880191cf520 R15=0000000000000010 RIP=ffffffff822704d3 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 00007f3f40a82900 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=00007ffc8c72b000 CR3=000000000c5c6000 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=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=00007f9976b1a050 CR3=00000000141c6000 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=d18cbf6083e9989f994333148e9514e4 XMM02=000000000011b2f0ec2efd57dc4c00df XMM03=0000000000121c903766f1548b235a13 XMM04=e8ae845b56c8bef500000000000ae988 XMM05=96e89b34fd579f2e0000000000132960 XMM06=bdf2e299e47b49d50000000000131690 XMM07=e042d86d42eb936e0000000000121f10 XMM08=3766f1548b235a13000000000011b350 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000