syzkaller login: [ 34.046266] BUG: Bad rss-counter state mm:000000006f950b0d type:MM_FILEPAGES val:33 [ 34.047566] BUG: Bad rss-counter state mm:000000006f950b0d type:MM_ANONPAGES val:22 [ 34.213610] ================================================================== [ 34.214740] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.215898] Read of size 8 at addr ffff88800e8bbc20 by task sshd/220 [ 34.217022] [ 34.217291] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.218358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.219560] Call Trace: [ 34.219980] [ 34.220293] dump_stack_lvl+0x91/0xf0 [ 34.220799] print_report+0xcc/0x620 [ 34.221307] ? __virt_addr_valid+0x102/0x340 [ 34.221875] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.222520] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.223156] kasan_report+0xbe/0xf0 [ 34.223655] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.224305] vma_interval_tree_remove+0xc75/0xec0 [ 34.224924] vma_prepare+0xc54/0x11a0 [ 34.225417] __split_vma+0x5af/0x950 [ 34.225908] ? __pfx___split_vma+0x10/0x10 [ 34.226453] ? find_held_lock+0x2c/0x110 [ 34.226996] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.227603] ? lock_is_held_type+0x9f/0x120 [ 34.228167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.228793] ? mtree_range_walk+0x632/0x900 [ 34.229365] ? mas_walk+0x5c7/0x7c0 [ 34.229859] do_vmi_munmap+0x1f1/0x2b0 [ 34.230369] mmap_region+0x1f9/0x2660 [ 34.230869] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.231399] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.232145] ? __pfx_lock_acquire+0x10/0x10 [ 34.232688] ? __pfx_mmap_region+0x10/0x10 [ 34.233239] ? security_mmap_addr+0x7d/0xa0 [ 34.233793] ? get_unmapped_area+0x1f5/0x3f0 [ 34.234357] do_mmap+0x854/0xf00 [ 34.234809] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.235325] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.235910] ksys_mmap_pgoff+0x3af/0x500 [ 34.236445] do_syscall_64+0x3f/0x90 [ 34.236936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.237607] RIP: 0033:0x7f258ebfdd82 [ 34.238079] 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 [ 34.240290] RSP: 002b:00007ffc0dc0ae08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.241229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f258ebfdd82 [ 34.242105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f258e037000 [ 34.242978] RBP: 00007f258e037000 R08: 0000000000000009 R09: 0000000000001000 [ 34.243866] R10: 0000000000000812 R11: 0000000000000206 R12: 000055add490ef70 [ 34.244737] R13: 00007ffc0dc0ae20 R14: 00007ffc0dc0ae50 R15: 00007ffc0dc0b1b0 [ 34.245621] [ 34.245920] [ 34.246139] Allocated by task 213: [ 34.246578] kasan_save_stack+0x22/0x50 [ 34.247102] kasan_set_track+0x25/0x30 [ 34.247631] __kasan_slab_alloc+0x59/0x70 [ 34.248175] kmem_cache_alloc+0x16b/0x370 [ 34.248708] vm_area_dup+0x20/0x160 [ 34.249184] __split_vma+0x170/0x950 [ 34.249660] split_vma+0xc6/0x110 [ 34.250118] mprotect_fixup+0x8d2/0xb30 [ 34.250642] do_mprotect_pkey+0x87e/0xd40 [ 34.251183] __x64_sys_mprotect+0x78/0xc0 [ 34.251731] do_syscall_64+0x3f/0x90 [ 34.252221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.252879] [ 34.253105] Freed by task 213: [ 34.253512] kasan_save_stack+0x22/0x50 [ 34.254030] kasan_set_track+0x25/0x30 [ 34.254539] kasan_save_free_info+0x2b/0x50 [ 34.255089] __kasan_slab_free+0x10a/0x190 [ 34.255657] kmem_cache_free+0x10d/0x4d0 [ 34.256194] rcu_core+0x8c8/0x2860 [ 34.256659] __do_softirq+0x1b7/0x7d4 [ 34.257148] [ 34.257372] Last potentially related work creation: [ 34.258022] kasan_save_stack+0x22/0x50 [ 34.258542] __kasan_record_aux_stack+0x8e/0xa0 [ 34.259133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.259809] remove_vma+0x139/0x170 [ 34.260276] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.260862] do_vmi_munmap+0x1f1/0x2b0 [ 34.261365] __vm_munmap+0x138/0x3a0 [ 34.261845] __x64_sys_munmap+0x59/0x80 [ 34.262362] do_syscall_64+0x3f/0x90 [ 34.262860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.263522] [ 34.263755] Second to last potentially related work creation: [ 34.264458] kasan_save_stack+0x22/0x50 [ 34.264975] __kasan_record_aux_stack+0x8e/0xa0 [ 34.265569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.266226] remove_vma+0x139/0x170 [ 34.266693] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.267279] do_vmi_munmap+0x1f1/0x2b0 [ 34.267800] __vm_munmap+0x138/0x3a0 [ 34.268290] elf_map+0x26f/0x310 [ 34.268759] load_elf_binary+0x3417/0x5030 [ 34.269313] bprm_execve+0x803/0x1940 [ 34.269793] do_execveat_common+0x734/0x8e0 [ 34.270339] __x64_sys_execve+0x93/0xc0 [ 34.270838] do_syscall_64+0x3f/0x90 [ 34.271327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.271997] [ 34.272225] The buggy address belongs to the object at ffff88800e8bbbc8 [ 34.272225] which belongs to the cache vm_area_struct of size 168 [ 34.273753] The buggy address is located 88 bytes inside of [ 34.273753] freed 168-byte region [ffff88800e8bbbc8, ffff88800e8bbc70) [ 34.275206] [ 34.275432] The buggy address belongs to the physical page: [ 34.276131] page:00000000ea6d1bee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8bb [ 34.277248] memcg:ffff88800e5b9901 [ 34.277687] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.278420] page_type: 0xffffffff() [ 34.278886] raw: 0100000000000200 ffff88800879fc80 ffffea00003ac880 dead000000000003 [ 34.279855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5b9901 [ 34.280813] page dumped because: kasan: bad access detected [ 34.281496] [ 34.281722] Memory state around the buggy address: [ 34.282321] ffff88800e8bbb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.283214] ffff88800e8bbb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.284089] >ffff88800e8bbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.284939] ^ [ 34.285488] ffff88800e8bbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.286356] ffff88800e8bbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.287218] ================================================================== [ 34.288189] Disabling lock debugging due to kernel taint [ 37.139611] BUG: Bad rss-counter state mm:0000000069cd33a9 type:MM_FILEPAGES val:33 [ 37.140667] BUG: Bad rss-counter state mm:0000000069cd33a9 type:MM_ANONPAGES val:22 [ 37.722732] BUG: Bad rss-counter state mm:00000000739a3aa3 type:MM_FILEPAGES val:33 [ 37.724004] BUG: Bad rss-counter state mm:00000000739a3aa3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50075' (ECDSA) to the list of known hosts. 2023/06/19 19:10:04 fuzzer started 2023/06/19 19:10:04 dialing manager at localhost:44161 2023/06/19 19:10:04 checking machine... 2023/06/19 19:10:04 checking revisions... [ 38.373179] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:10:05 testing simple program... [ 38.435039] cgroup: Unknown subsys name 'net' [ 38.490194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:10:01 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=00007f0175bacd80 CR3=000000000f54a000 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=3c8b2c239a5dee8f194e0c04783ee8ba XMM02=ec2efd57dc4c00df000000000011e848 XMM03=8646c34960815dec000000000011e918 XMM04=e06a5a8d81717f4c00000000000ae988 XMM05=b02b4ae11c01444e0000000000137638 XMM06=e4cb8bb95a7664b600000000001364f0 XMM07=fb795ef6d65770560000000000125248 XMM08=2c67c8bc2e329bc3000000000011e8b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b40 RCX=0000000000000001 RDX=1ffff1100d9e1369 RSI=ffffffff81807ebb RDI=ffff88806cf09b48 RBP=0000000000000011 RSP=ffff88806cf09a58 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020de7 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff88800eff9b40 R15=ffff88800dacdd80 RIP=ffffffff813ad46e 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 00007fcedae72900 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=00007fcedb429618 CR3=000000000cbe6000 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