syzkaller login: [ 33.249487] BUG: Bad rss-counter state mm:0000000002bcfc27 type:MM_FILEPAGES val:33 [ 33.250636] BUG: Bad rss-counter state mm:0000000002bcfc27 type:MM_ANONPAGES val:22 [ 33.402816] ================================================================== [ 33.403931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.405066] Read of size 8 at addr ffff88800e2f2df0 by task sshd/222 [ 33.406224] [ 33.406494] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.407559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.408771] Call Trace: [ 33.409165] [ 33.409519] dump_stack_lvl+0x91/0xf0 [ 33.410115] print_report+0xcc/0x620 [ 33.410669] ? __virt_addr_valid+0x102/0x340 [ 33.411218] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.411847] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.412467] kasan_report+0xbe/0xf0 [ 33.412946] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.413577] vma_interval_tree_remove+0xc75/0xec0 [ 33.414204] vma_prepare+0xc54/0x11a0 [ 33.414682] __split_vma+0x5af/0x950 [ 33.415153] ? __pfx___split_vma+0x10/0x10 [ 33.415681] ? find_held_lock+0x2c/0x110 [ 33.416214] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.416776] ? lock_is_held_type+0x9f/0x120 [ 33.417325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.417939] ? mtree_range_walk+0x632/0x900 [ 33.418496] ? mas_walk+0x5c7/0x7c0 [ 33.418980] do_vmi_munmap+0x1f1/0x2b0 [ 33.419475] mmap_region+0x1f9/0x2660 [ 33.419962] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.420478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.421192] ? __pfx_lock_acquire+0x10/0x10 [ 33.421722] ? __pfx_mmap_region+0x10/0x10 [ 33.422274] ? security_mmap_addr+0x7d/0xa0 [ 33.422804] ? get_unmapped_area+0x1f5/0x3f0 [ 33.423362] do_mmap+0x854/0xf00 [ 33.423799] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.424293] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.424851] ksys_mmap_pgoff+0x3af/0x500 [ 33.425361] do_syscall_64+0x3f/0x90 [ 33.425844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.426498] RIP: 0033:0x7f0d306b3d82 [ 33.426959] 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 [ 33.429081] RSP: 002b:00007ffff18d5718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.429978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d306b3d82 [ 33.430852] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d2faed000 [ 33.431700] RBP: 00007f0d2faed000 R08: 0000000000000009 R09: 0000000000001000 [ 33.432539] R10: 0000000000000812 R11: 0000000000000206 R12: 000056203330aec0 [ 33.433387] R13: 00007ffff18d5730 R14: 00007ffff18d5760 R15: 00007ffff18d5ac0 [ 33.434260] [ 33.434553] [ 33.434767] Allocated by task 215: [ 33.435196] kasan_save_stack+0x22/0x50 [ 33.435701] kasan_set_track+0x25/0x30 [ 33.436197] __kasan_slab_alloc+0x59/0x70 [ 33.436717] kmem_cache_alloc+0x16b/0x370 [ 33.437243] vm_area_dup+0x20/0x160 [ 33.437700] __split_vma+0x170/0x950 [ 33.438177] split_vma+0xc6/0x110 [ 33.438614] mprotect_fixup+0x8d2/0xb30 [ 33.439127] do_mprotect_pkey+0x87e/0xd40 [ 33.439651] __x64_sys_mprotect+0x78/0xc0 [ 33.440184] do_syscall_64+0x3f/0x90 [ 33.440658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.441301] [ 33.441524] Freed by task 215: [ 33.441919] kasan_save_stack+0x22/0x50 [ 33.442447] kasan_set_track+0x25/0x30 [ 33.442945] kasan_save_free_info+0x2b/0x50 [ 33.443484] __kasan_slab_free+0x10a/0x190 [ 33.444016] kmem_cache_free+0x10d/0x4d0 [ 33.444524] rcu_core+0x8c8/0x2860 [ 33.444973] __do_softirq+0x1b7/0x7d4 [ 33.445446] [ 33.445663] Last potentially related work creation: [ 33.446259] kasan_save_stack+0x22/0x50 [ 33.446858] __kasan_record_aux_stack+0x8e/0xa0 [ 33.447432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.448074] remove_vma+0x139/0x170 [ 33.448527] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.449083] do_vmi_munmap+0x1f1/0x2b0 [ 33.449567] __vm_munmap+0x138/0x3a0 [ 33.450035] __x64_sys_munmap+0x59/0x80 [ 33.450548] do_syscall_64+0x3f/0x90 [ 33.451021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.451661] [ 33.451875] The buggy address belongs to the object at ffff88800e2f2d98 [ 33.451875] which belongs to the cache vm_area_struct of size 168 [ 33.453329] The buggy address is located 88 bytes inside of [ 33.453329] freed 168-byte region [ffff88800e2f2d98, ffff88800e2f2e40) [ 33.454731] [ 33.454953] The buggy address belongs to the physical page: [ 33.455615] page:00000000e59710ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2f2 [ 33.456690] memcg:ffff88800e490301 [ 33.457123] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.457768] page_type: 0xffffffff() [ 33.458236] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.459153] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e490301 [ 33.460059] page dumped because: kasan: bad access detected [ 33.460720] [ 33.460942] Memory state around the buggy address: [ 33.461527] ffff88800e2f2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.462387] ffff88800e2f2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.463258] >ffff88800e2f2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.464106] ^ [ 33.464918] ffff88800e2f2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.465775] ffff88800e2f2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.466636] ================================================================== [ 33.467572] Disabling lock debugging due to kernel taint [ 35.465115] BUG: Bad rss-counter state mm:0000000063d66652 type:MM_FILEPAGES val:33 [ 35.466251] BUG: Bad rss-counter state mm:0000000063d66652 type:MM_ANONPAGES val:22 [ 36.027190] BUG: Bad rss-counter state mm:00000000ec82fe9c type:MM_FILEPAGES val:33 [ 36.028353] BUG: Bad rss-counter state mm:00000000ec82fe9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64570' (ECDSA) to the list of known hosts. 2023/06/19 16:00:47 fuzzer started 2023/06/19 16:00:47 dialing manager at localhost:44161 2023/06/19 16:00:47 checking machine... 2023/06/19 16:00:47 checking revisions... [ 36.730612] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:00:48 testing simple program... [ 36.780375] cgroup: Unknown subsys name 'net' [ 36.834308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe440b82a8 CR3=00000000147aa000 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=2037343a30303a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a30303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11003502e8a RSP=ffff88801a817430 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000a5100000a51 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007fb0a3d89900 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=00007fb0a4340618 CR3=000000000c808000 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