syzkaller login: [ 38.051066] BUG: Bad rss-counter state mm:00000000cf355a80 type:MM_FILEPAGES val:33 [ 38.051999] BUG: Bad rss-counter state mm:00000000cf355a80 type:MM_ANONPAGES val:22 [ 38.166559] ================================================================== [ 38.167239] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.167894] Read of size 8 at addr ffff8880181eb3f8 by task sshd/219 [ 38.168430] [ 38.168591] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.169250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.169934] Call Trace: [ 38.170158] <TASK> [ 38.170369] dump_stack_lvl+0x91/0xf0 [ 38.170858] print_report+0xcc/0x620 [ 38.171198] ? __virt_addr_valid+0x102/0x340 [ 38.171582] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.172007] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.172433] kasan_report+0xbe/0xf0 [ 38.172761] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.173233] vma_interval_tree_remove+0xc75/0xec0 [ 38.173654] vma_prepare+0xc54/0x11a0 [ 38.174018] __split_vma+0x5af/0x950 [ 38.174367] ? __pfx___split_vma+0x10/0x10 [ 38.174738] ? find_held_lock+0x2c/0x110 [ 38.175124] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.175519] ? lock_is_held_type+0x9f/0x120 [ 38.175899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.176337] ? mtree_range_walk+0x632/0x900 [ 38.176718] ? mas_walk+0x5c7/0x7c0 [ 38.177117] do_vmi_munmap+0x1f1/0x2b0 [ 38.177460] mmap_region+0x1f9/0x2660 [ 38.177795] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.178168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.178664] ? __pfx_lock_acquire+0x10/0x10 [ 38.179067] ? __pfx_mmap_region+0x10/0x10 [ 38.179435] ? security_mmap_addr+0x7d/0xa0 [ 38.179806] ? get_unmapped_area+0x1f5/0x3f0 [ 38.180236] do_mmap+0x854/0xf00 [ 38.180543] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.180935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.181322] ksys_mmap_pgoff+0x3af/0x500 [ 38.181691] do_syscall_64+0x3f/0x90 [ 38.182031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.182493] RIP: 0033:0x7f3743500d82 [ 38.182812] 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 [ 38.184323] RSP: 002b:00007ffdf91b8868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.185024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3743500d82 [ 38.185615] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f374293a000 [ 38.186249] RBP: 00007f374293a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.186838] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c22c33fec0 [ 38.187435] R13: 00007ffdf91b8880 R14: 00007ffdf91b88b0 R15: 00007ffdf91b8c10 [ 38.188035] </TASK> [ 38.188240] [ 38.188390] Allocated by task 212: [ 38.188684] kasan_save_stack+0x22/0x50 [ 38.189088] kasan_set_track+0x25/0x30 [ 38.189357] __kasan_slab_alloc+0x59/0x70 [ 38.189639] kmem_cache_alloc+0x16b/0x370 [ 38.189922] vm_area_dup+0x20/0x160 [ 38.190171] __split_vma+0x170/0x950 [ 38.190423] split_vma+0xc6/0x110 [ 38.190662] mprotect_fixup+0x8d2/0xb30 [ 38.190961] do_mprotect_pkey+0x87e/0xd40 [ 38.191241] __x64_sys_mprotect+0x78/0xc0 [ 38.191520] do_syscall_64+0x3f/0x90 [ 38.191777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.192134] [ 38.192251] Freed by task 212: [ 38.192462] kasan_save_stack+0x22/0x50 [ 38.192732] kasan_set_track+0x25/0x30 [ 38.193023] kasan_save_free_info+0x2b/0x50 [ 38.193327] __kasan_slab_free+0x10a/0x190 [ 38.193621] kmem_cache_free+0x10d/0x4d0 [ 38.193896] rcu_core+0x8c8/0x2860 [ 38.194138] __do_softirq+0x1b7/0x7d4 [ 38.194397] [ 38.194517] Last potentially related work creation: [ 38.194831] kasan_save_stack+0x22/0x50 [ 38.195106] __kasan_record_aux_stack+0x8e/0xa0 [ 38.195418] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.195764] remove_vma+0x139/0x170 [ 38.196007] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.196312] do_vmi_munmap+0x1f1/0x2b0 [ 38.196576] __vm_munmap+0x138/0x3a0 [ 38.196829] __x64_sys_munmap+0x59/0x80 [ 38.199452] do_syscall_64+0x3f/0x90 [ 38.199782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.200219] [ 38.200373] Second to last potentially related work creation: [ 38.200839] kasan_save_stack+0x22/0x50 [ 38.201204] __kasan_record_aux_stack+0x8e/0xa0 [ 38.201591] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.202009] remove_vma+0x139/0x170 [ 38.202309] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.202704] do_vmi_munmap+0x1f1/0x2b0 [ 38.203013] mmap_region+0x1f9/0x2660 [ 38.203306] do_mmap+0x854/0xf00 [ 38.203579] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.203885] ksys_mmap_pgoff+0x3af/0x500 [ 38.204209] do_syscall_64+0x3f/0x90 [ 38.204512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.204939] [ 38.205088] The buggy address belongs to the object at ffff8880181eb3a0 [ 38.205088] which belongs to the cache vm_area_struct of size 168 [ 38.206080] The buggy address is located 88 bytes inside of [ 38.206080] freed 168-byte region [ffff8880181eb3a0, ffff8880181eb448) [ 38.207019] [ 38.207156] The buggy address belongs to the physical page: [ 38.207594] page:00000000b521a9b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181eb [ 38.208370] memcg:ffff88800abc9001 [ 38.208644] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.209152] page_type: 0xffffffff() [ 38.209451] raw: 0100000000000200 ffff88800879fc80 ffffea00003cb8c0 dead000000000003 [ 38.210072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800abc9001 [ 38.210659] page dumped because: kasan: bad access detected [ 38.211108] [ 38.211257] Memory state around the buggy address: [ 38.211675] ffff8880181eb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.212277] ffff8880181eb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.212904] >ffff8880181eb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.213508] ^ [ 38.214077] ffff8880181eb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.214650] ffff8880181eb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.215227] ================================================================== [ 38.215958] Disabling lock debugging due to kernel taint [ 40.193148] BUG: Bad rss-counter state mm:00000000bdab4e5a type:MM_FILEPAGES val:33 [ 40.193811] BUG: Bad rss-counter state mm:00000000bdab4e5a type:MM_ANONPAGES val:22 [ 40.631097] BUG: Bad rss-counter state mm:000000009b6ece65 type:MM_FILEPAGES val:33 [ 40.631813] BUG: Bad rss-counter state mm:000000009b6ece65 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20516' (ECDSA) to the list of known hosts. 2023/06/20 09:19:39 fuzzer started 2023/06/20 09:19:39 dialing manager at localhost:44161 2023/06/20 09:19:39 checking machine... 2023/06/20 09:19:39 checking revisions... [ 41.152468] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:19:39 testing simple program... [ 41.184083] cgroup: Unknown subsys name 'net' [ 41.216817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:19:36 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=00007fff0da8a508 CR3=00000000165c8000 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=2039333a39313a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a39313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7082 RBX=ffffffff85db8410 RCX=ffffffff81370a39 RDX=0000000000000000 RSI=ffffffff860d0c26 RDI=ffffffff85db8410 RBP=ffffffff85db8410 RSP=ffff88806cf099b8 R8 =ffffffff860d0c26 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fc0f R12=ffffffff85db8410 R13=ffffffff85db8410 R14=ffffffff85db8410 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f4bd754f900 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=00007f4bd7b06618 CR3=000000000eab8000 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