syzkaller login: [ 38.666418] BUG: Bad rss-counter state mm:00000000c83df54c type:MM_FILEPAGES val:33 [ 38.667135] BUG: Bad rss-counter state mm:00000000c83df54c type:MM_ANONPAGES val:22 [ 38.799571] ================================================================== [ 38.800101] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.800654] Read of size 8 at addr ffff88800e690df0 by task sshd/219 [ 38.801100] [ 38.801225] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.801734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.802307] Call Trace: [ 38.802492] [ 38.802661] dump_stack_lvl+0x91/0xf0 [ 38.802946] print_report+0xcc/0x620 [ 38.803227] ? __virt_addr_valid+0x102/0x340 [ 38.803528] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.803862] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.804194] kasan_report+0xbe/0xf0 [ 38.804455] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.804793] vma_interval_tree_remove+0xc75/0xec0 [ 38.805235] vma_prepare+0xc54/0x11a0 [ 38.805536] __split_vma+0x5af/0x950 [ 38.805792] ? __pfx___split_vma+0x10/0x10 [ 38.806081] ? find_held_lock+0x2c/0x110 [ 38.806365] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.806669] ? lock_is_held_type+0x9f/0x120 [ 38.806966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.807292] ? mtree_range_walk+0x632/0x900 [ 38.807593] ? mas_walk+0x5c7/0x7c0 [ 38.807854] do_vmi_munmap+0x1f1/0x2b0 [ 38.808123] mmap_region+0x1f9/0x2660 [ 38.808384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.808661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.809054] ? __pfx_lock_acquire+0x10/0x10 [ 38.809352] ? __pfx_mmap_region+0x10/0x10 [ 38.809638] ? security_mmap_addr+0x7d/0xa0 [ 38.809926] ? get_unmapped_area+0x1f5/0x3f0 [ 38.810225] do_mmap+0x854/0xf00 [ 38.810464] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.810735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.811038] ksys_mmap_pgoff+0x3af/0x500 [ 38.811338] do_syscall_64+0x3f/0x90 [ 38.811624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.812009] RIP: 0033:0x7fe332d2ad82 [ 38.812283] 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 [ 38.813584] RSP: 002b:00007ffc8cc36d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.814137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe332d2ad82 [ 38.814633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe332164000 [ 38.815132] RBP: 00007fe332164000 R08: 0000000000000009 R09: 0000000000001000 [ 38.815624] R10: 0000000000000812 R11: 0000000000000206 R12: 00005567eda28d90 [ 38.816127] R13: 00007ffc8cc36d40 R14: 00007ffc8cc36d70 R15: 00007ffc8cc370d0 [ 38.816642] [ 38.816821] [ 38.816950] Allocated by task 212: [ 38.817211] kasan_save_stack+0x22/0x50 [ 38.817508] kasan_set_track+0x25/0x30 [ 38.817781] __kasan_slab_alloc+0x59/0x70 [ 38.818086] kmem_cache_alloc+0x16b/0x370 [ 38.818390] vm_area_dup+0x20/0x160 [ 38.818666] __split_vma+0x170/0x950 [ 38.818939] split_vma+0xc6/0x110 [ 38.819195] mprotect_fixup+0x8d2/0xb30 [ 38.819486] do_mprotect_pkey+0x87e/0xd40 [ 38.819787] __x64_sys_mprotect+0x78/0xc0 [ 38.820079] do_syscall_64+0x3f/0x90 [ 38.820355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.820726] [ 38.820848] Freed by task 203: [ 38.821074] kasan_save_stack+0x22/0x50 [ 38.821379] kasan_set_track+0x25/0x30 [ 38.821665] kasan_save_free_info+0x2b/0x50 [ 38.821974] __kasan_slab_free+0x10a/0x190 [ 38.822281] kmem_cache_free+0x10d/0x4d0 [ 38.822583] rcu_core+0x8c8/0x2860 [ 38.822852] __do_softirq+0x1b7/0x7d4 [ 38.823125] [ 38.823245] Last potentially related work creation: [ 38.823592] kasan_save_stack+0x22/0x50 [ 38.823883] __kasan_record_aux_stack+0x8e/0xa0 [ 38.824213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.824593] remove_vma+0x139/0x170 [ 38.824858] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.825184] do_vmi_munmap+0x1f1/0x2b0 [ 38.825470] __vm_munmap+0x138/0x3a0 [ 38.825736] __x64_sys_munmap+0x59/0x80 [ 38.826022] do_syscall_64+0x3f/0x90 [ 38.826304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.826674] [ 38.826800] Second to last potentially related work creation: [ 38.827197] kasan_save_stack+0x22/0x50 [ 38.827492] __kasan_record_aux_stack+0x8e/0xa0 [ 38.827828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.828205] remove_vma+0x139/0x170 [ 38.828476] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.828797] do_vmi_munmap+0x1f1/0x2b0 [ 38.829079] mmap_region+0x1f9/0x2660 [ 38.829368] do_mmap+0x854/0xf00 [ 38.829618] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.829903] ksys_mmap_pgoff+0x3af/0x500 [ 38.830198] do_syscall_64+0x3f/0x90 [ 38.830474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.830854] [ 38.830981] The buggy address belongs to the object at ffff88800e690d98 [ 38.830981] which belongs to the cache vm_area_struct of size 168 [ 38.831856] The buggy address is located 88 bytes inside of [ 38.831856] freed 168-byte region [ffff88800e690d98, ffff88800e690e40) [ 38.832698] [ 38.832822] The buggy address belongs to the physical page: [ 38.833211] page:000000000965013b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe690 [ 38.833852] memcg:ffff88800e774601 [ 38.834105] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.834480] page_type: 0xffffffff() [ 38.834742] raw: 0100000000000200 ffff8880087a0c80 ffffea0000400fc0 dead000000000004 [ 38.835288] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e774601 [ 38.835824] page dumped because: kasan: bad access detected [ 38.836204] [ 38.836334] Memory state around the buggy address: [ 38.836672] ffff88800e690c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.837183] ffff88800e690d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.837701] >ffff88800e690d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.838217] ^ [ 38.838684] ffff88800e690e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.839197] ffff88800e690e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.839714] ================================================================== [ 38.840360] Disabling lock debugging due to kernel taint [ 40.937643] BUG: Bad rss-counter state mm:00000000791fd532 type:MM_FILEPAGES val:33 [ 40.939219] BUG: Bad rss-counter state mm:00000000791fd532 type:MM_ANONPAGES val:22 [ 41.424952] BUG: Bad rss-counter state mm:00000000fbeb58e0 type:MM_FILEPAGES val:33 [ 41.425914] BUG: Bad rss-counter state mm:00000000fbeb58e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40594' (ECDSA) to the list of known hosts. 2023/06/21 00:20:23 fuzzer started 2023/06/21 00:20:23 dialing manager at localhost:36067 2023/06/21 00:20:23 checking machine... 2023/06/21 00:20:23 checking revisions... [ 42.243036] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:20:23 testing simple program... [ 42.292554] cgroup: Unknown subsys name 'net' [ 42.334282] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:20:23 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=000000000000000c RCX=0000000000000001 RDX=0000000000092cc0 RSI=000000000000000d RDI=ffff888015ca77e0 RBP=dffffc0000000000 RSP=ffff888015ca76f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000092cc0 R14=ffff888015ca7780 R15=0000000000092cc0 RIP=ffffffff813ad651 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 00007f84f0363900 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=00007f84ef7ded60 CR3=000000000f5ee000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=98b01cb0a184ec0c00000000000ae988 XMM05=0614f1dddbf4fcd00000000000134060 XMM06=4fda316b135da52b0000000000132ae0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff1100d9e13a8 RCX=0000000000000000 RDX=1ffff11002c35b10 RSI=ffffffff813ed998 RDI=ffff8880161ad898 RBP=ffff8880161ad1c0 RSP=ffff88806cf09d38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffffffffffffff R13=ffff8880161ad880 R14=ffff88800fd07398 R15=ffffffffffffffff RIP=ffffffff813ed9f1 RFL=00000046 [---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 00007f8d78748900 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=00007f8d78cff618 CR3=000000001a28e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000