syzkaller login: [ 31.408696] BUG: Bad rss-counter state mm:000000006768d4b1 type:MM_FILEPAGES val:33 [ 31.410025] BUG: Bad rss-counter state mm:000000006768d4b1 type:MM_ANONPAGES val:22 [ 31.447192] ================================================================== [ 31.448245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.449284] Read of size 8 at addr ffff888016ae7c20 by task sshd/220 [ 31.450059] [ 31.450280] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.451169] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.452153] Call Trace: [ 31.452485] [ 31.452775] dump_stack_lvl+0x91/0xf0 [ 31.453267] print_report+0xcc/0x620 [ 31.453760] ? __virt_addr_valid+0x102/0x340 [ 31.454326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.454945] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.455576] kasan_report+0xbe/0xf0 [ 31.456058] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.456709] vma_interval_tree_remove+0xc75/0xec0 [ 31.457315] vma_prepare+0xc54/0x11a0 [ 31.457795] __split_vma+0x5af/0x950 [ 31.458270] ? __pfx___split_vma+0x10/0x10 [ 31.458797] ? find_held_lock+0x2c/0x110 [ 31.459317] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.459888] ? lock_is_held_type+0x9f/0x120 [ 31.460450] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.461058] ? mtree_range_walk+0x632/0x900 [ 31.461612] ? mas_walk+0x5c7/0x7c0 [ 31.462092] do_vmi_munmap+0x1f1/0x2b0 [ 31.462582] mmap_region+0x1f9/0x2660 [ 31.463063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.463570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.464280] ? __pfx_lock_acquire+0x10/0x10 [ 31.464833] ? __pfx_mmap_region+0x10/0x10 [ 31.465367] ? security_mmap_addr+0x7d/0xa0 [ 31.465904] ? get_unmapped_area+0x1f5/0x3f0 [ 31.466460] do_mmap+0x854/0xf00 [ 31.466904] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.467401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.467969] ksys_mmap_pgoff+0x3af/0x500 [ 31.468511] do_syscall_64+0x3f/0x90 [ 31.468991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.469646] RIP: 0033:0x7f06703e0d82 [ 31.470103] 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 [ 31.472233] RSP: 002b:00007ffed5179c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.473160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06703e0d82 [ 31.474011] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f066f81a000 [ 31.474858] RBP: 00007f066f81a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.475707] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f7c6c7ec0 [ 31.476581] R13: 00007ffed5179c60 R14: 00007ffed5179c90 R15: 00007ffed5179ff0 [ 31.477438] [ 31.477732] [ 31.477947] Allocated by task 213: [ 31.478377] kasan_save_stack+0x22/0x50 [ 31.478883] kasan_set_track+0x25/0x30 [ 31.479372] __kasan_slab_alloc+0x59/0x70 [ 31.479894] kmem_cache_alloc+0x16b/0x370 [ 31.480415] vm_area_dup+0x20/0x160 [ 31.480874] __split_vma+0x170/0x950 [ 31.481347] split_vma+0xc6/0x110 [ 31.481783] mprotect_fixup+0x8d2/0xb30 [ 31.482282] do_mprotect_pkey+0x87e/0xd40 [ 31.482798] __x64_sys_mprotect+0x78/0xc0 [ 31.483320] do_syscall_64+0x3f/0x90 [ 31.483792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.484444] [ 31.484663] Freed by task 19: [ 31.485044] kasan_save_stack+0x22/0x50 [ 31.485550] kasan_set_track+0x25/0x30 [ 31.486045] kasan_save_free_info+0x2b/0x50 [ 31.486578] __kasan_slab_free+0x10a/0x190 [ 31.487112] kmem_cache_free+0x10d/0x4d0 [ 31.487620] rcu_core+0x8c8/0x2860 [ 31.488064] __do_softirq+0x1b7/0x7d4 [ 31.488558] [ 31.488776] Last potentially related work creation: [ 31.489363] kasan_save_stack+0x22/0x50 [ 31.489863] __kasan_record_aux_stack+0x8e/0xa0 [ 31.490432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.491076] remove_vma+0x139/0x170 [ 31.491531] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.492086] do_vmi_munmap+0x1f1/0x2b0 [ 31.492585] __vm_munmap+0x138/0x3a0 [ 31.493054] __x64_sys_munmap+0x59/0x80 [ 31.493550] do_syscall_64+0x3f/0x90 [ 31.494021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.494672] [ 31.494889] The buggy address belongs to the object at ffff888016ae7bc8 [ 31.494889] which belongs to the cache vm_area_struct of size 168 [ 31.496398] The buggy address is located 88 bytes inside of [ 31.496398] freed 168-byte region [ffff888016ae7bc8, ffff888016ae7c70) [ 31.497797] [ 31.498012] The buggy address belongs to the physical page: [ 31.498692] page:0000000021ea13f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ae7 [ 31.499793] memcg:ffff88800da85c01 [ 31.500226] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.500909] page_type: 0xffffffff() [ 31.501364] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.502313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da85c01 [ 31.503239] page dumped because: kasan: bad access detected [ 31.503907] [ 31.504136] Memory state around the buggy address: [ 31.504748] ffff888016ae7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.505628] ffff888016ae7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.506511] >ffff888016ae7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.507371] ^ [ 31.507900] ffff888016ae7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.508762] ffff888016ae7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.509624] ================================================================== [ 31.510858] Disabling lock debugging due to kernel taint [ 33.319844] BUG: Bad rss-counter state mm:00000000c3acd283 type:MM_FILEPAGES val:33 [ 33.321046] BUG: Bad rss-counter state mm:00000000c3acd283 type:MM_ANONPAGES val:22 [ 33.731810] BUG: Bad rss-counter state mm:00000000eef0417b type:MM_FILEPAGES val:33 [ 33.732863] BUG: Bad rss-counter state mm:00000000eef0417b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20689' (ECDSA) to the list of known hosts. 2023/06/20 19:40:36 fuzzer started 2023/06/20 19:40:36 dialing manager at localhost:36067 2023/06/20 19:40:36 checking machine... 2023/06/20 19:40:36 checking revisions... [ 34.394301] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:40:36 testing simple program... [ 34.439768] cgroup: Unknown subsys name 'net' [ 34.482433] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:40:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fdc1fcee000 CR3=000000000c95a000 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=e1a0ad54a4c025ade44f6a83d8f68a7d XMM02=000000000011a2c0ec2efd57dc4c00df XMM03=0000000000121c080ef513a65fa013c9 XMM04=f593f373c14051bb00000000000ae988 XMM05=123d651f3932b22f0000000000131f60 XMM06=4fda316b135da52b0000000000131958 XMM07=e042d86d42eb936e0000000000121e88 XMM08=0ef513a65fa013c9000000000011a320 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e66bcf0 RBX=ffff88806cf09ee8 RCX=1ffff11001ccd79e RDX=ffff8880192266f0 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000008 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88801627ce60 RIP=ffffffff8137fcd9 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 00007f1090326900 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=00007fffd948d000 CR3=000000000da36000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000