syzkaller login: [ 30.688211] BUG: Bad rss-counter state mm:000000000ccae05e type:MM_FILEPAGES val:33 [ 30.689492] BUG: Bad rss-counter state mm:000000000ccae05e type:MM_ANONPAGES val:22 [ 30.838977] ================================================================== [ 30.840040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.841148] Read of size 8 at addr ffff888018c91228 by task sshd/221 [ 30.842168] [ 30.842423] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.843299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.844300] Call Trace: [ 30.844625] [ 30.844907] dump_stack_lvl+0x91/0xf0 [ 30.845403] print_report+0xcc/0x620 [ 30.845890] ? __virt_addr_valid+0x102/0x340 [ 30.846445] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847077] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847700] kasan_report+0xbe/0xf0 [ 30.848183] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848804] vma_interval_tree_remove+0xc75/0xec0 [ 30.849423] vma_prepare+0xc54/0x11a0 [ 30.849900] __split_vma+0x5af/0x950 [ 30.850371] ? __pfx___split_vma+0x10/0x10 [ 30.850935] ? find_held_lock+0x2c/0x110 [ 30.851463] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.852037] ? lock_is_held_type+0x9f/0x120 [ 30.852580] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.853189] ? mtree_range_walk+0x632/0x900 [ 30.853755] ? mas_walk+0x5c7/0x7c0 [ 30.854237] do_vmi_munmap+0x1f1/0x2b0 [ 30.854736] mmap_region+0x1f9/0x2660 [ 30.855228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.855738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.856457] ? __pfx_lock_acquire+0x10/0x10 [ 30.856991] ? __pfx_mmap_region+0x10/0x10 [ 30.857534] ? security_mmap_addr+0x7d/0xa0 [ 30.858067] ? get_unmapped_area+0x1f5/0x3f0 [ 30.858631] do_mmap+0x854/0xf00 [ 30.859080] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.859580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.860150] ksys_mmap_pgoff+0x3af/0x500 [ 30.860665] do_syscall_64+0x3f/0x90 [ 30.861154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861816] RIP: 0033:0x7fdd23020d82 [ 30.862287] 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 [ 30.864455] RSP: 002b:00007ffd71fba0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.865380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd23020d82 [ 30.866238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd2245a000 [ 30.867100] RBP: 00007fdd2245a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.867964] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fe0876ec0 [ 30.868827] R13: 00007ffd71fba0d0 R14: 00007ffd71fba100 R15: 00007ffd71fba460 [ 30.869703] [ 30.869999] [ 30.870221] Allocated by task 214: [ 30.870663] kasan_save_stack+0x22/0x50 [ 30.871176] kasan_set_track+0x25/0x30 [ 30.871678] __kasan_slab_alloc+0x59/0x70 [ 30.872214] kmem_cache_alloc+0x16b/0x370 [ 30.872735] vm_area_dup+0x20/0x160 [ 30.873191] __split_vma+0x170/0x950 [ 30.873666] split_vma+0xc6/0x110 [ 30.874102] mprotect_fixup+0x8d2/0xb30 [ 30.874608] do_mprotect_pkey+0x87e/0xd40 [ 30.875127] __x64_sys_mprotect+0x78/0xc0 [ 30.875656] do_syscall_64+0x3f/0x90 [ 30.876131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876786] [ 30.876998] Freed by task 13: [ 30.877392] kasan_save_stack+0x22/0x50 [ 30.877904] kasan_set_track+0x25/0x30 [ 30.878410] kasan_save_free_info+0x2b/0x50 [ 30.878958] __kasan_slab_free+0x10a/0x190 [ 30.879502] kmem_cache_free+0x10d/0x4d0 [ 30.880014] rcu_core+0x8c8/0x2860 [ 30.880467] __do_softirq+0x1b7/0x7d4 [ 30.881028] [ 30.881308] Last potentially related work creation: [ 30.881987] kasan_save_stack+0x22/0x50 [ 30.882528] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883817] remove_vma+0x139/0x170 [ 30.884272] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.884855] do_vmi_munmap+0x1f1/0x2b0 [ 30.885342] __vm_munmap+0x138/0x3a0 [ 30.885825] __x64_sys_munmap+0x59/0x80 [ 30.886328] do_syscall_64+0x3f/0x90 [ 30.886851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887499] [ 30.887718] The buggy address belongs to the object at ffff888018c911d0 [ 30.887718] which belongs to the cache vm_area_struct of size 168 [ 30.889213] The buggy address is located 88 bytes inside of [ 30.889213] freed 168-byte region [ffff888018c911d0, ffff888018c91278) [ 30.890628] [ 30.890848] The buggy address belongs to the physical page: [ 30.891506] page:000000001de2ef47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c91 [ 30.892629] memcg:ffff888015d07201 [ 30.893068] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.893753] page_type: 0xffffffff() [ 30.894362] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.895603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d07201 [ 30.896758] page dumped because: kasan: bad access detected [ 30.897389] [ 30.897602] Memory state around the buggy address: [ 30.898172] ffff888018c91100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.898990] ffff888018c91180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.899806] >ffff888018c91200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.900626] ^ [ 30.901155] ffff888018c91280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.901984] ffff888018c91300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.902823] ================================================================== [ 30.903767] Disabling lock debugging due to kernel taint [ 32.805860] BUG: Bad rss-counter state mm:00000000233cf02f type:MM_FILEPAGES val:33 [ 32.806865] BUG: Bad rss-counter state mm:00000000233cf02f type:MM_ANONPAGES val:22 [ 33.292119] BUG: Bad rss-counter state mm:00000000a89a601e type:MM_FILEPAGES val:33 [ 33.293016] BUG: Bad rss-counter state mm:00000000a89a601e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63537' (ECDSA) to the list of known hosts. 2023/06/21 03:30:31 fuzzer started 2023/06/21 03:30:32 dialing manager at localhost:36067 2023/06/21 03:30:32 checking machine... 2023/06/21 03:30:32 checking revisions... [ 34.040386] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:30:32 testing simple program... [ 34.084777] cgroup: Unknown subsys name 'net' [ 34.124137] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:30:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff836827e6 RCX=0000000000000001 RDX=1ffff110031f3eec RSI=ffff888018f9fae0 RDI=ffffffff836827e6 RBP=ffffffff836827e6 RSP=ffff888018f9f6b8 R8 =0000000000000001 R9 =ffff888018f9f748 R10=0000000000038001 R11=000000000008b60d R12=0000000000000001 R13=0000000000000000 R14=ffff888015e01b40 R15=0000000000000000 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007fcd22520900 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=00007ffe570bd000 CR3=000000000d9a8000 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=00007fddd120bb10 CR3=000000000f3cc000 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=1ec99c447b6148855e4ce22e670d8067 XMM02=2c67c8bc2e329bc3000000000011d2e0 XMM03=fb795ef6d65770560000000000121a80 XMM04=42afc4213f0c3db000000000000ae988 XMM05=e4cb8bb95a7664b60000000000131950 XMM06=c291bd5c70af25b900000000001317d8 XMM07=e042d86d42eb936e0000000000121d00 XMM08=8f82f7124826a68d000000000011d340 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000