syzkaller login: [ 28.765362] BUG: Bad rss-counter state mm:00000000503ff59f type:MM_FILEPAGES val:33 [ 28.766837] BUG: Bad rss-counter state mm:00000000503ff59f type:MM_ANONPAGES val:22 [ 28.920873] ================================================================== [ 28.921805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.922757] Read of size 8 at addr ffff888018ef35c8 by task sshd/220 [ 28.923530] [ 28.923753] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.924722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.925708] Call Trace: [ 28.926043] <TASK> [ 28.926333] dump_stack_lvl+0x91/0xf0 [ 28.926824] print_report+0xcc/0x620 [ 28.927308] ? __virt_addr_valid+0x102/0x340 [ 28.927861] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.928482] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.929106] kasan_report+0xbe/0xf0 [ 28.929585] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.930225] vma_interval_tree_remove+0xc75/0xec0 [ 28.930834] vma_prepare+0xc54/0x11a0 [ 28.931315] __split_vma+0x5af/0x950 [ 28.931790] ? __pfx___split_vma+0x10/0x10 [ 28.932316] ? find_held_lock+0x2c/0x110 [ 28.932836] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.933411] ? lock_is_held_type+0x9f/0x120 [ 28.933986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.934608] ? mtree_range_walk+0x632/0x900 [ 28.935182] ? mas_walk+0x5c7/0x7c0 [ 28.935667] do_vmi_munmap+0x1f1/0x2b0 [ 28.936170] mmap_region+0x1f9/0x2660 [ 28.936660] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.937178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.937924] ? __pfx_lock_acquire+0x10/0x10 [ 28.938466] ? __pfx_mmap_region+0x10/0x10 [ 28.939015] ? security_mmap_addr+0x7d/0xa0 [ 28.939557] ? get_unmapped_area+0x1f5/0x3f0 [ 28.940120] do_mmap+0x854/0xf00 [ 28.940572] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.941078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.941649] ksys_mmap_pgoff+0x3af/0x500 [ 28.942180] do_syscall_64+0x3f/0x90 [ 28.942668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.943321] RIP: 0033:0x7f59b13acd82 [ 28.943781] 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 [ 28.945951] RSP: 002b:00007ffecc056af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.946891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59b13acd82 [ 28.947760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59b07e6000 [ 28.948621] RBP: 00007f59b07e6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.949471] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f96718fec0 [ 28.950334] R13: 00007ffecc056b10 R14: 00007ffecc056b40 R15: 00007ffecc056ea0 [ 28.951201] </TASK> [ 28.951496] [ 28.951711] Allocated by task 213: [ 28.952141] kasan_save_stack+0x22/0x50 [ 28.952644] kasan_set_track+0x25/0x30 [ 28.953137] __kasan_slab_alloc+0x59/0x70 [ 28.953668] kmem_cache_alloc+0x16b/0x370 [ 28.954212] vm_area_dup+0x20/0x160 [ 28.954667] __split_vma+0x170/0x950 [ 28.955138] split_vma+0xc6/0x110 [ 28.955586] mprotect_fixup+0x8d2/0xb30 [ 28.956094] do_mprotect_pkey+0x87e/0xd40 [ 28.956623] __x64_sys_mprotect+0x78/0xc0 [ 28.957158] do_syscall_64+0x3f/0x90 [ 28.957651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.958320] [ 28.958545] Freed by task 213: [ 28.958952] kasan_save_stack+0x22/0x50 [ 28.959466] kasan_set_track+0x25/0x30 [ 28.959960] kasan_save_free_info+0x2b/0x50 [ 28.960520] __kasan_slab_free+0x10a/0x190 [ 28.961065] kmem_cache_free+0x10d/0x4d0 [ 28.961572] rcu_core+0x8c8/0x2860 [ 28.962021] __do_softirq+0x1b7/0x7d4 [ 28.962496] [ 28.962709] Last potentially related work creation: [ 28.963293] kasan_save_stack+0x22/0x50 [ 28.963792] __kasan_record_aux_stack+0x8e/0xa0 [ 28.964365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.965002] remove_vma+0x139/0x170 [ 28.965450] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.966014] do_vmi_munmap+0x1f1/0x2b0 [ 28.966495] __vm_munmap+0x138/0x3a0 [ 28.966967] __x64_sys_munmap+0x59/0x80 [ 28.967460] do_syscall_64+0x3f/0x90 [ 28.967935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.968571] [ 28.968786] The buggy address belongs to the object at ffff888018ef3570 [ 28.968786] which belongs to the cache vm_area_struct of size 168 [ 28.970264] The buggy address is located 88 bytes inside of [ 28.970264] freed 168-byte region [ffff888018ef3570, ffff888018ef3618) [ 28.971648] [ 28.971860] The buggy address belongs to the physical page: [ 28.972507] page:00000000f46308e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ef3 [ 28.973584] memcg:ffff88800edeca01 [ 28.974029] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.974668] page_type: 0xffffffff() [ 28.975117] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.976027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edeca01 [ 28.976927] page dumped because: kasan: bad access detected [ 28.977584] [ 28.977809] Memory state around the buggy address: [ 28.978381] ffff888018ef3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.979223] ffff888018ef3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.980061] >ffff888018ef3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.980899] ^ [ 28.981552] ffff888018ef3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.982414] ffff888018ef3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.983254] ================================================================== [ 28.984351] Disabling lock debugging due to kernel taint [ 30.907861] BUG: Bad rss-counter state mm:000000000ccae254 type:MM_FILEPAGES val:33 [ 30.909073] BUG: Bad rss-counter state mm:000000000ccae254 type:MM_ANONPAGES val:22 [ 31.307187] BUG: Bad rss-counter state mm:0000000076275c7b type:MM_FILEPAGES val:33 [ 31.308849] BUG: Bad rss-counter state mm:0000000076275c7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38160' (ECDSA) to the list of known hosts. 2023/06/21 02:43:06 fuzzer started 2023/06/21 02:43:06 dialing manager at localhost:36067 2023/06/21 02:43:06 checking machine... 2023/06/21 02:43:06 checking revisions... [ 32.021849] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:43:06 testing simple program... [ 32.068872] cgroup: Unknown subsys name 'net' [ 32.125093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:43:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000001b RCX=ffffffff811f7e49 RDX=ffff888014380000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888019df1640 RSP=ffff88801437f8b8 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000001b R11=63206e6f69737365 R12=ffffffff854f6380 R13=0000000000000000 R14=ffff88800893f308 R15=1ffff1100286ff1d RIP=ffffffff811f7e4b RFL=00000206 [-----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 00007f0a2766e900 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=00007f0a26a72600 CR3=000000000d6f4000 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=56760b006260d983234cbf63c6e0b099 XMM02=eff9b2d0a8fce9cb000000000011cfb0 XMM03=2c67c8bc2e329bc3000000000011d0d8 XMM04=f92f139f833ca32100000000000ae988 XMM05=02ce26f803c14a260000000000132748 XMM06=4fda316b135da52b0000000000131538 XMM07=fb795ef6d65770560000000000121810 XMM08=2c67c8bc2e329bc3000000000011d0d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888015dd51c0 RCX=0000000000000000 RDX=ffff888015dd51c0 RSI=ffffffff8171b21d RDI=ffff888015dd5858 RBP=0000000000000000 RSP=ffff888018dbfe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007ffd39bb021c R14=0000000000000000 R15=0000000000000040 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f79bc7c3900 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=00007ffd39bb021c CR3=000000000d6a4000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000