syzkaller login: [ 78.666546] BUG: Bad rss-counter state mm:00000000623a2f18 type:MM_FILEPAGES val:33 [ 78.668153] BUG: Bad rss-counter state mm:00000000623a2f18 type:MM_ANONPAGES val:22 [ 78.704644] ================================================================== [ 78.705699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.706733] Read of size 8 at addr ffff88800e814880 by task sshd/220 [ 78.707507] [ 78.707727] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 78.708784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.709795] Call Trace: [ 78.710133] [ 78.710430] dump_stack_lvl+0x91/0xf0 [ 78.710926] print_report+0xcc/0x620 [ 78.711416] ? __virt_addr_valid+0x102/0x340 [ 78.711981] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.712600] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.713222] kasan_report+0xbe/0xf0 [ 78.713724] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.714363] vma_interval_tree_remove+0xc75/0xec0 [ 78.714981] vma_prepare+0xc54/0x11a0 [ 78.715471] __split_vma+0x5af/0x950 [ 78.715966] ? __pfx___split_vma+0x10/0x10 [ 78.716503] ? find_held_lock+0x2c/0x110 [ 78.717036] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.717614] ? lock_is_held_type+0x9f/0x120 [ 78.718172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.718810] ? mtree_range_walk+0x632/0x900 [ 78.719376] ? mas_walk+0x5c7/0x7c0 [ 78.719864] do_vmi_munmap+0x1f1/0x2b0 [ 78.720375] mmap_region+0x1f9/0x2660 [ 78.720872] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.721388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.722131] ? __pfx_lock_acquire+0x10/0x10 [ 78.722674] ? __pfx_mmap_region+0x10/0x10 [ 78.723214] ? security_mmap_addr+0x7d/0xa0 [ 78.723766] ? get_unmapped_area+0x1f5/0x3f0 [ 78.724331] do_mmap+0x854/0xf00 [ 78.724782] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.725281] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.725871] ksys_mmap_pgoff+0x3af/0x500 [ 78.726393] do_syscall_64+0x3f/0x90 [ 78.726874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.727531] RIP: 0033:0x7f0553af6d82 [ 78.728010] 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 [ 78.730215] RSP: 002b:00007fffaceea428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.731140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0553af6d82 [ 78.732011] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0552f30000 [ 78.732877] RBP: 00007f0552f30000 R08: 0000000000000009 R09: 0000000000001000 [ 78.733752] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640aed0df60 [ 78.734629] R13: 00007fffaceea440 R14: 00007fffaceea470 R15: 00007fffaceea7d0 [ 78.735511] [ 78.735824] [ 78.736044] Allocated by task 213: [ 78.736485] kasan_save_stack+0x22/0x50 [ 78.737000] kasan_set_track+0x25/0x30 [ 78.737506] __kasan_slab_alloc+0x59/0x70 [ 78.738048] kmem_cache_alloc+0x16b/0x370 [ 78.738578] vm_area_dup+0x20/0x160 [ 78.739042] __split_vma+0x170/0x950 [ 78.739512] split_vma+0xc6/0x110 [ 78.739957] mprotect_fixup+0x8d2/0xb30 [ 78.740474] do_mprotect_pkey+0x87e/0xd40 [ 78.741012] __x64_sys_mprotect+0x78/0xc0 [ 78.741535] do_syscall_64+0x3f/0x90 [ 78.742029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.742683] [ 78.742900] Freed by task 213: [ 78.743297] kasan_save_stack+0x22/0x50 [ 78.743806] kasan_set_track+0x25/0x30 [ 78.744306] kasan_save_free_info+0x2b/0x50 [ 78.744844] __kasan_slab_free+0x10a/0x190 [ 78.745391] kmem_cache_free+0x10d/0x4d0 [ 78.745910] rcu_core+0x8c8/0x2860 [ 78.746359] __do_softirq+0x1b7/0x7d4 [ 78.746835] [ 78.747050] Last potentially related work creation: [ 78.747649] kasan_save_stack+0x22/0x50 [ 78.748166] __kasan_record_aux_stack+0x8e/0xa0 [ 78.748752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.749410] remove_vma+0x139/0x170 [ 78.749886] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.750448] do_vmi_munmap+0x1f1/0x2b0 [ 78.750945] __vm_munmap+0x138/0x3a0 [ 78.751425] __x64_sys_munmap+0x59/0x80 [ 78.751928] do_syscall_64+0x3f/0x90 [ 78.752404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.753054] [ 78.753272] Second to last potentially related work creation: [ 78.753960] kasan_save_stack+0x22/0x50 [ 78.754470] __kasan_record_aux_stack+0x8e/0xa0 [ 78.755052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.755699] remove_vma+0x139/0x170 [ 78.756154] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.756716] do_vmi_munmap+0x1f1/0x2b0 [ 78.757219] __vm_munmap+0x138/0x3a0 [ 78.757701] elf_map+0x26f/0x310 [ 78.758158] load_elf_binary+0xd82/0x5030 [ 78.758684] bprm_execve+0x803/0x1940 [ 78.759166] do_execveat_common+0x734/0x8e0 [ 78.759697] __x64_sys_execve+0x93/0xc0 [ 78.760194] do_syscall_64+0x3f/0x90 [ 78.760675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.761328] [ 78.761546] The buggy address belongs to the object at ffff88800e814828 [ 78.761546] which belongs to the cache vm_area_struct of size 168 [ 78.763045] The buggy address is located 88 bytes inside of [ 78.763045] freed 168-byte region [ffff88800e814828, ffff88800e8148d0) [ 78.764460] [ 78.764678] The buggy address belongs to the physical page: [ 78.765339] page:00000000a89fe932 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe814 [ 78.766448] memcg:ffff888008e8ff01 [ 78.766874] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 78.767581] page_type: 0xffffffff() [ 78.768035] raw: 0100000000000200 ffff88800879fc80 ffffea000039a780 dead000000000005 [ 78.768965] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008e8ff01 [ 78.769890] page dumped because: kasan: bad access detected [ 78.770554] [ 78.770770] Memory state around the buggy address: [ 78.771357] ffff88800e814780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 78.772225] ffff88800e814800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 78.773097] >ffff88800e814880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 78.773964] ^ [ 78.774385] ffff88800e814900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.775252] ffff88800e814980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 78.776185] ================================================================== [ 78.777275] Disabling lock debugging due to kernel taint [ 81.037369] BUG: Bad rss-counter state mm:00000000cfcd31fc type:MM_FILEPAGES val:33 [ 81.038460] BUG: Bad rss-counter state mm:00000000cfcd31fc type:MM_ANONPAGES val:22 [ 81.505161] BUG: Bad rss-counter state mm:000000001a262125 type:MM_FILEPAGES val:33 [ 81.506620] BUG: Bad rss-counter state mm:000000001a262125 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27162' (ECDSA) to the list of known hosts. 2023/06/19 12:48:56 fuzzer started 2023/06/19 12:48:56 dialing manager at localhost:44161 2023/06/19 12:48:56 checking machine... 2023/06/19 12:48:56 checking revisions... [ 82.258615] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:48:56 testing simple program... [ 82.310152] cgroup: Unknown subsys name 'net' [ 82.362773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:48:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81894b1b RDX=ffff88800fa83680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016aca028 RSP=ffff88801467f578 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88801467f78c R13=0000000000000081 R14=ffffffff856f0b20 R15=ffff888016820035 RIP=ffffffff814c0245 RFL=00000293 [--S-A-C] 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 00007f9a4e0a0900 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=000055a150a19318 CR3=000000000c73c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=6cfd59be595416f400000000000ae988 XMM05=25f750c32612b5e3000000000013b810 XMM06=4fda316b135da52b000000000013a540 XMM07=fb795ef6d65770560000000000129038 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=1ffff1100d9e1355 RSI=ffff88806cf09fe0 RDI=ffff88806cf09aa8 RBP=ffff88806cf09fe0 RSP=ffff88806cf099f0 R8 =ffffffff864b4f3c R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09fe8 R15=ffff88806cf09a98 RIP=ffffffff8113046e 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 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=00007fff7f6acde8 CR3=0000000005482000 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=00007f1cdb706510000055783e4a6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000