syzkaller login: [ 30.247895] BUG: Bad rss-counter state mm:00000000b5600c80 type:MM_FILEPAGES val:33 [ 30.249588] BUG: Bad rss-counter state mm:00000000b5600c80 type:MM_ANONPAGES val:22 [ 30.408256] ================================================================== [ 30.409326] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.410568] Read of size 8 at addr ffff88800d8804e0 by task sshd/219 [ 30.411484] [ 30.411753] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.412875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.414038] Call Trace: [ 30.414385] [ 30.414691] dump_stack_lvl+0x91/0xf0 [ 30.415359] print_report+0xcc/0x620 [ 30.415868] ? __virt_addr_valid+0x102/0x340 [ 30.416417] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.417122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.417823] kasan_report+0xbe/0xf0 [ 30.418351] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.419039] vma_interval_tree_remove+0xc75/0xec0 [ 30.419706] vma_prepare+0xc54/0x11a0 [ 30.420243] __split_vma+0x5af/0x950 [ 30.420782] ? __pfx___split_vma+0x10/0x10 [ 30.421364] ? find_held_lock+0x2c/0x110 [ 30.421948] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.422582] ? lock_is_held_type+0x9f/0x120 [ 30.423133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.423742] ? mtree_range_walk+0x632/0x900 [ 30.424303] ? mas_walk+0x5c7/0x7c0 [ 30.424806] do_vmi_munmap+0x1f1/0x2b0 [ 30.425306] mmap_region+0x1f9/0x2660 [ 30.425793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.426314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.427029] ? __pfx_lock_acquire+0x10/0x10 [ 30.427565] ? __pfx_mmap_region+0x10/0x10 [ 30.428095] ? security_mmap_addr+0x7d/0xa0 [ 30.428634] ? get_unmapped_area+0x1f5/0x3f0 [ 30.429186] do_mmap+0x854/0xf00 [ 30.429630] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.430189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.430809] ksys_mmap_pgoff+0x3af/0x500 [ 30.431312] do_syscall_64+0x3f/0x90 [ 30.431793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.432443] RIP: 0033:0x7f26ae8d8d82 [ 30.432908] 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 [ 30.435048] RSP: 002b:00007fff5ff2afb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.435952] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26ae8d8d82 [ 30.436815] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26add12000 [ 30.437745] RBP: 00007f26add12000 R08: 0000000000000009 R09: 0000000000001000 [ 30.438567] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604569e3ec0 [ 30.439396] R13: 00007fff5ff2afd0 R14: 00007fff5ff2b000 R15: 00007fff5ff2b360 [ 30.440231] [ 30.440517] [ 30.440739] Allocated by task 212: [ 30.441162] kasan_save_stack+0x22/0x50 [ 30.441655] kasan_set_track+0x25/0x30 [ 30.442135] __kasan_slab_alloc+0x59/0x70 [ 30.442646] kmem_cache_alloc+0x16b/0x370 [ 30.443149] vm_area_dup+0x20/0x160 [ 30.443596] __split_vma+0x170/0x950 [ 30.444051] split_vma+0xc6/0x110 [ 30.444481] mprotect_fixup+0x8d2/0xb30 [ 30.444989] do_mprotect_pkey+0x87e/0xd40 [ 30.445499] __x64_sys_mprotect+0x78/0xc0 [ 30.446008] do_syscall_64+0x3f/0x90 [ 30.446471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.447094] [ 30.447308] Freed by task 212: [ 30.447690] kasan_save_stack+0x22/0x50 [ 30.448190] kasan_set_track+0x25/0x30 [ 30.448694] kasan_save_free_info+0x2b/0x50 [ 30.449233] __kasan_slab_free+0x10a/0x190 [ 30.449772] kmem_cache_free+0x10d/0x4d0 [ 30.450292] rcu_core+0x8c8/0x2860 [ 30.450727] __do_softirq+0x1b7/0x7d4 [ 30.451254] [ 30.451465] Last potentially related work creation: [ 30.452033] kasan_save_stack+0x22/0x50 [ 30.452520] __kasan_record_aux_stack+0x8e/0xa0 [ 30.453090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.453720] remove_vma+0x139/0x170 [ 30.454159] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.454699] do_vmi_munmap+0x1f1/0x2b0 [ 30.455171] __vm_munmap+0x138/0x3a0 [ 30.455628] __x64_sys_munmap+0x59/0x80 [ 30.456112] do_syscall_64+0x3f/0x90 [ 30.456575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.457211] [ 30.457419] The buggy address belongs to the object at ffff88800d880488 [ 30.457419] which belongs to the cache vm_area_struct of size 168 [ 30.458837] The buggy address is located 88 bytes inside of [ 30.458837] freed 168-byte region [ffff88800d880488, ffff88800d880530) [ 30.460202] [ 30.460414] The buggy address belongs to the physical page: [ 30.461058] page:00000000cd58da4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd880 [ 30.462113] memcg:ffff88800d28f201 [ 30.462530] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.463155] page_type: 0xffffffff() [ 30.463594] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384f00 dead000000000004 [ 30.464491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d28f201 [ 30.465385] page dumped because: kasan: bad access detected [ 30.466023] [ 30.466232] Memory state around the buggy address: [ 30.466794] ffff88800d880380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.467629] ffff88800d880400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.468464] >ffff88800d880480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.469313] ^ [ 30.470071] ffff88800d880500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.470899] ffff88800d880580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.471727] ================================================================== [ 30.472633] Disabling lock debugging due to kernel taint [ 32.530464] BUG: Bad rss-counter state mm:00000000ec19e2ac type:MM_FILEPAGES val:33 [ 32.531651] BUG: Bad rss-counter state mm:00000000ec19e2ac type:MM_ANONPAGES val:22 [ 32.996306] BUG: Bad rss-counter state mm:00000000a6294a83 type:MM_FILEPAGES val:33 [ 32.997514] BUG: Bad rss-counter state mm:00000000a6294a83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61713' (ECDSA) to the list of known hosts. 2023/06/21 00:56:47 fuzzer started 2023/06/21 00:56:47 dialing manager at localhost:36067 2023/06/21 00:56:47 checking machine... 2023/06/21 00:56:47 checking revisions... [ 33.653823] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:56:47 testing simple program... [ 33.713300] cgroup: Unknown subsys name 'net' [ 33.767650] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:56:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c9b6000 RCX=ffffffff8367549e RDX=ffff88801a0751c0 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888015e67788 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888010325200 R13=0000000000000000 R14=0000000000000000 R15=ffff88800ca8f600 RIP=ffffffff814c0860 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 00007fa73bd72900 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=00007fa73c329618 CR3=000000000e8d2000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f9d176a7730 CR3=000000000fbbc000 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=2037343a36353a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a36353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000