syzkaller login: [ 34.529928] BUG: Bad rss-counter state mm:000000003a42b3fb type:MM_FILEPAGES val:33 [ 34.530878] BUG: Bad rss-counter state mm:000000003a42b3fb type:MM_ANONPAGES val:22 [ 34.709581] ================================================================== [ 34.710693] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.711866] Read of size 8 at addr ffff88800c917c20 by task sshd/219 [ 34.712699] [ 34.712947] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.713914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.714968] Call Trace: [ 34.715311] [ 34.715619] dump_stack_lvl+0x91/0xf0 [ 34.716186] print_report+0xcc/0x620 [ 34.716733] ? __virt_addr_valid+0x102/0x340 [ 34.717355] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.718059] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.718964] kasan_report+0xbe/0xf0 [ 34.719679] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.720612] vma_interval_tree_remove+0xc75/0xec0 [ 34.721503] vma_prepare+0xc54/0x11a0 [ 34.722242] __split_vma+0x5af/0x950 [ 34.722949] ? __pfx___split_vma+0x10/0x10 [ 34.723735] ? find_held_lock+0x2c/0x110 [ 34.724504] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.725304] ? lock_is_held_type+0x9f/0x120 [ 34.726091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.726965] ? mtree_range_walk+0x632/0x900 [ 34.727643] ? mas_walk+0x5c7/0x7c0 [ 34.728158] do_vmi_munmap+0x1f1/0x2b0 [ 34.728686] mmap_region+0x1f9/0x2660 [ 34.729214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.729761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.730537] ? __pfx_lock_acquire+0x10/0x10 [ 34.731135] ? __pfx_mmap_region+0x10/0x10 [ 34.731716] ? security_mmap_addr+0x7d/0xa0 [ 34.732292] ? get_unmapped_area+0x1f5/0x3f0 [ 34.732902] do_mmap+0x854/0xf00 [ 34.733538] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.734292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.735111] ksys_mmap_pgoff+0x3af/0x500 [ 34.735860] do_syscall_64+0x3f/0x90 [ 34.736540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.737447] RIP: 0033:0x7f1a9880cd82 [ 34.738107] 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 [ 34.740581] RSP: 002b:00007ffcebb83cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.741566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a9880cd82 [ 34.742716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a97c46000 [ 34.743905] RBP: 00007f1a97c46000 R08: 0000000000000009 R09: 0000000000001000 [ 34.744993] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5bfa8fec0 [ 34.745928] R13: 00007ffcebb83cd0 R14: 00007ffcebb83d00 R15: 00007ffcebb84060 [ 34.746867] [ 34.747191] [ 34.747419] Allocated by task 212: [ 34.747885] kasan_save_stack+0x22/0x50 [ 34.748421] kasan_set_track+0x25/0x30 [ 34.748941] __kasan_slab_alloc+0x59/0x70 [ 34.749501] kmem_cache_alloc+0x16b/0x370 [ 34.750085] vm_area_dup+0x20/0x160 [ 34.750573] __split_vma+0x170/0x950 [ 34.751075] split_vma+0xc6/0x110 [ 34.751545] mprotect_fixup+0x8d2/0xb30 [ 34.752088] do_mprotect_pkey+0x87e/0xd40 [ 34.752766] __x64_sys_mprotect+0x78/0xc0 [ 34.753486] do_syscall_64+0x3f/0x90 [ 34.754179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.754868] [ 34.755106] Freed by task 19: [ 34.755512] kasan_save_stack+0x22/0x50 [ 34.756039] kasan_set_track+0x25/0x30 [ 34.756552] kasan_save_free_info+0x2b/0x50 [ 34.757109] __kasan_slab_free+0x10a/0x190 [ 34.757676] kmem_cache_free+0x10d/0x4d0 [ 34.758252] rcu_core+0x8c8/0x2860 [ 34.758717] __do_softirq+0x1b7/0x7d4 [ 34.759215] [ 34.759440] Last potentially related work creation: [ 34.760059] kasan_save_stack+0x22/0x50 [ 34.760586] __kasan_record_aux_stack+0x8e/0xa0 [ 34.761192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.761867] remove_vma+0x139/0x170 [ 34.762350] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.762935] do_vmi_munmap+0x1f1/0x2b0 [ 34.763446] __vm_munmap+0x138/0x3a0 [ 34.763939] __x64_sys_munmap+0x59/0x80 [ 34.764608] do_syscall_64+0x3f/0x90 [ 34.765128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.765811] [ 34.766059] The buggy address belongs to the object at ffff88800c917bc8 [ 34.766059] which belongs to the cache vm_area_struct of size 168 [ 34.767652] The buggy address is located 88 bytes inside of [ 34.767652] freed 168-byte region [ffff88800c917bc8, ffff88800c917c70) [ 34.769214] [ 34.769447] The buggy address belongs to the physical page: [ 34.770189] page:000000006c868687 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc917 [ 34.771426] memcg:ffff88800bf2d401 [ 34.771873] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.772544] page_type: 0xffffffff() [ 34.773019] raw: 0100000000000200 ffff88800879fc80 ffffea0000395040 dead000000000008 [ 34.773983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf2d401 [ 34.774926] page dumped because: kasan: bad access detected [ 34.775608] [ 34.775835] Memory state around the buggy address: [ 34.776436] ffff88800c917b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.777323] ffff88800c917b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.778220] >ffff88800c917c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.779109] ^ [ 34.779674] ffff88800c917c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.780600] ffff88800c917d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.781524] ================================================================== [ 34.782633] Disabling lock debugging due to kernel taint [ 36.804582] BUG: Bad rss-counter state mm:00000000e56d19f7 type:MM_FILEPAGES val:33 [ 36.805785] BUG: Bad rss-counter state mm:00000000e56d19f7 type:MM_ANONPAGES val:22 [ 37.182973] BUG: Bad rss-counter state mm:00000000bd578c95 type:MM_FILEPAGES val:33 [ 37.183981] BUG: Bad rss-counter state mm:00000000bd578c95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61100' (ECDSA) to the list of known hosts. 2023/06/19 19:51:07 fuzzer started 2023/06/19 19:51:07 dialing manager at localhost:44161 2023/06/19 19:51:07 checking machine... 2023/06/19 19:51:07 checking revisions... [ 37.976458] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:51:07 testing simple program... [ 38.023022] cgroup: Unknown subsys name 'net' [ 38.083453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:51:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016a16c80 RCX=0000000000000000 RDX=1ffff11002d42dab RSI=0000000000000004 RDI=ffff888016a16d5c RBP=ffff888016a16d5c RSP=ffff88800edffaf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000280 R11=00000000000b6996 R12=0000000000000140 R13=ffff88801bc4e100 R14=0000000000000cc0 R15=ffff888008f76500 RIP=ffffffff8180fd54 RFL=00000246 [---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 00007fc0a2a59900 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=00007fc0a3010618 CR3=0000000014706000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe357e9ab60 CR3=000000000ea06000 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=c27f2e78ebe9e0b3e74589add369385f XMM02=000000000011f8c0ec2efd57dc4c00df XMM03=0000000000124028bd6ec16c71ad6383 XMM04=d0a4fe57c939d59c00000000000ae988 XMM05=dfcdbad4f1609c370000000000133bb0 XMM06=1e0e3d3245fdf9e10000000000132a18 XMM07=e042d86d42eb936e00000000001242a8 XMM08=bd6ec16c71ad6383000000000011f920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000