syzkaller login: [ 63.039240] BUG: Bad rss-counter state mm:000000008df720f0 type:MM_FILEPAGES val:33 [ 63.040505] BUG: Bad rss-counter state mm:000000008df720f0 type:MM_ANONPAGES val:22 [ 63.226730] ================================================================== [ 63.227742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.228779] Read of size 8 at addr ffff88800cbda228 by task sshd/221 [ 63.229763] [ 63.230032] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.230995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.232084] Call Trace: [ 63.232440] [ 63.232760] dump_stack_lvl+0x91/0xf0 [ 63.233339] print_report+0xcc/0x620 [ 63.233885] ? __virt_addr_valid+0x102/0x340 [ 63.234495] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.235188] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.235875] kasan_report+0xbe/0xf0 [ 63.236405] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.237110] vma_interval_tree_remove+0xc75/0xec0 [ 63.237787] vma_prepare+0xc54/0x11a0 [ 63.238327] __split_vma+0x5af/0x950 [ 63.238861] ? __pfx___split_vma+0x10/0x10 [ 63.239456] ? find_held_lock+0x2c/0x110 [ 63.240033] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.240660] ? lock_is_held_type+0x9f/0x120 [ 63.241276] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.241948] ? mtree_range_walk+0x632/0x900 [ 63.242558] ? mas_walk+0x5c7/0x7c0 [ 63.243090] do_vmi_munmap+0x1f1/0x2b0 [ 63.243636] mmap_region+0x1f9/0x2660 [ 63.244170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.244735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.245541] ? __pfx_lock_acquire+0x10/0x10 [ 63.246133] ? __pfx_mmap_region+0x10/0x10 [ 63.246718] ? security_mmap_addr+0x7d/0xa0 [ 63.247308] ? get_unmapped_area+0x1f5/0x3f0 [ 63.247916] do_mmap+0x854/0xf00 [ 63.248404] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.248968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.249595] ksys_mmap_pgoff+0x3af/0x500 [ 63.250157] do_syscall_64+0x3f/0x90 [ 63.250713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.251434] RIP: 0033:0x7fb7aabc5d82 [ 63.251939] 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 [ 63.254295] RSP: 002b:00007ffc8c3490b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.255293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7aabc5d82 [ 63.256234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7a9fff000 [ 63.257179] RBP: 00007fb7a9fff000 R08: 0000000000000009 R09: 0000000000001000 [ 63.258119] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b90ca99ec0 [ 63.259060] R13: 00007ffc8c3490d0 R14: 00007ffc8c349100 R15: 00007ffc8c349460 [ 63.260016] [ 63.260342] [ 63.260583] Allocated by task 214: [ 63.261068] kasan_save_stack+0x22/0x50 [ 63.261624] kasan_set_track+0x25/0x30 [ 63.262168] __kasan_slab_alloc+0x59/0x70 [ 63.262793] kmem_cache_alloc+0x16b/0x370 [ 63.263360] vm_area_dup+0x20/0x160 [ 63.263862] __split_vma+0x170/0x950 [ 63.264369] split_vma+0xc6/0x110 [ 63.264847] mprotect_fixup+0x8d2/0xb30 [ 63.265412] do_mprotect_pkey+0x87e/0xd40 [ 63.265981] __x64_sys_mprotect+0x78/0xc0 [ 63.266546] do_syscall_64+0x3f/0x90 [ 63.267062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.267762] [ 63.268000] Freed by task 214: [ 63.268426] kasan_save_stack+0x22/0x50 [ 63.269002] kasan_set_track+0x25/0x30 [ 63.269542] kasan_save_free_info+0x2b/0x50 [ 63.270125] __kasan_slab_free+0x10a/0x190 [ 63.270709] kmem_cache_free+0x10d/0x4d0 [ 63.271332] rcu_core+0x8c8/0x2860 [ 63.271816] __do_softirq+0x1b7/0x7d4 [ 63.272338] [ 63.272573] Last potentially related work creation: [ 63.273221] kasan_save_stack+0x22/0x50 [ 63.273774] __kasan_record_aux_stack+0x8e/0xa0 [ 63.274405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.275118] remove_vma+0x139/0x170 [ 63.275612] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.276230] do_vmi_munmap+0x1f1/0x2b0 [ 63.276774] __vm_munmap+0x138/0x3a0 [ 63.277299] __x64_sys_munmap+0x59/0x80 [ 63.277841] do_syscall_64+0x3f/0x90 [ 63.278358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.279069] [ 63.279308] The buggy address belongs to the object at ffff88800cbda1d0 [ 63.279308] which belongs to the cache vm_area_struct of size 168 [ 63.280939] The buggy address is located 88 bytes inside of [ 63.280939] freed 168-byte region [ffff88800cbda1d0, ffff88800cbda278) [ 63.282449] [ 63.282686] The buggy address belongs to the physical page: [ 63.283405] page:000000008cb8a571 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbda [ 63.284581] memcg:ffff888019c56e01 [ 63.285051] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.285752] page_type: 0xffffffff() [ 63.286240] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.287236] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c56e01 [ 63.288219] page dumped because: kasan: bad access detected [ 63.288960] [ 63.289197] Memory state around the buggy address: [ 63.289834] ffff88800cbda100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.290765] ffff88800cbda180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 63.291690] >ffff88800cbda200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 63.292608] ^ [ 63.293221] ffff88800cbda280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.294150] ffff88800cbda300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.295069] ================================================================== [ 63.296075] Disabling lock debugging due to kernel taint [ 65.344843] BUG: Bad rss-counter state mm:00000000bcfb40db type:MM_FILEPAGES val:33 [ 65.346145] BUG: Bad rss-counter state mm:00000000bcfb40db type:MM_ANONPAGES val:22 [ 65.796812] BUG: Bad rss-counter state mm:0000000020e70510 type:MM_FILEPAGES val:33 [ 65.797981] BUG: Bad rss-counter state mm:0000000020e70510 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64811' (ECDSA) to the list of known hosts. 2023/06/20 07:49:21 fuzzer started 2023/06/20 07:49:21 dialing manager at localhost:44161 2023/06/20 07:49:21 checking machine... 2023/06/20 07:49:21 checking revisions... [ 66.349307] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:49:21 testing simple program... [ 66.400960] cgroup: Unknown subsys name 'net' [ 66.455414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:49:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800dfb67a0 RCX=ffffffff81370c98 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff888016687d20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce35000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff813710bc RFL=00000016 [----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 00007fbdbb668900 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=00007fbdbbc200b0 CR3=0000000016a5c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007f2d17b470b0 CR3=0000000019f1e000 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=2031323a39343a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000