syzkaller login: [ 32.411724] BUG: Bad rss-counter state mm:00000000eb78b549 type:MM_FILEPAGES val:33 [ 32.412986] BUG: Bad rss-counter state mm:00000000eb78b549 type:MM_ANONPAGES val:22 [ 32.450651] ================================================================== [ 32.451624] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.452550] Read of size 8 at addr ffff888019e7ddf0 by task sshd/220 [ 32.453308] [ 32.453529] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.454407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.455372] Call Trace: [ 32.455689] [ 32.455988] dump_stack_lvl+0x91/0xf0 [ 32.456490] print_report+0xcc/0x620 [ 32.456976] ? __virt_addr_valid+0x102/0x340 [ 32.457525] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.458144] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.458770] kasan_report+0xbe/0xf0 [ 32.459242] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.459879] vma_interval_tree_remove+0xc75/0xec0 [ 32.460482] vma_prepare+0xc54/0x11a0 [ 32.460960] __split_vma+0x5af/0x950 [ 32.461435] ? __pfx___split_vma+0x10/0x10 [ 32.461964] ? find_held_lock+0x2c/0x110 [ 32.462513] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.463076] ? lock_is_held_type+0x9f/0x120 [ 32.463625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.464224] ? mtree_range_walk+0x632/0x900 [ 32.464776] ? mas_walk+0x5c7/0x7c0 [ 32.465257] do_vmi_munmap+0x1f1/0x2b0 [ 32.465766] mmap_region+0x1f9/0x2660 [ 32.466252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.466780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.467499] ? __pfx_lock_acquire+0x10/0x10 [ 32.468040] ? __pfx_mmap_region+0x10/0x10 [ 32.468583] ? security_mmap_addr+0x7d/0xa0 [ 32.469123] ? get_unmapped_area+0x1f5/0x3f0 [ 32.469678] do_mmap+0x854/0xf00 [ 32.470121] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.470650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.471244] ksys_mmap_pgoff+0x3af/0x500 [ 32.471757] do_syscall_64+0x3f/0x90 [ 32.472242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.472901] RIP: 0033:0x7f8fce7fdd82 [ 32.473359] 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 [ 32.475505] RSP: 002b:00007ffdcc151518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.476398] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fce7fdd82 [ 32.477239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fcdc37000 [ 32.478090] RBP: 00007f8fcdc37000 R08: 0000000000000009 R09: 0000000000001000 [ 32.478959] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f08d8eeb20 [ 32.479797] R13: 00007ffdcc151530 R14: 00007ffdcc151560 R15: 00007ffdcc1518c0 [ 32.480642] [ 32.480932] [ 32.481145] Allocated by task 213: [ 32.481569] kasan_save_stack+0x22/0x50 [ 32.482068] kasan_set_track+0x25/0x30 [ 32.482580] __kasan_slab_alloc+0x59/0x70 [ 32.483093] kmem_cache_alloc+0x16b/0x370 [ 32.483603] vm_area_dup+0x20/0x160 [ 32.484051] __split_vma+0x170/0x950 [ 32.484511] split_vma+0xc6/0x110 [ 32.484945] mprotect_fixup+0x8d2/0xb30 [ 32.485446] do_mprotect_pkey+0x87e/0xd40 [ 32.485960] __x64_sys_mprotect+0x78/0xc0 [ 32.486488] do_syscall_64+0x3f/0x90 [ 32.486955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.487590] [ 32.487806] Freed by task 213: [ 32.488192] kasan_save_stack+0x22/0x50 [ 32.488688] kasan_set_track+0x25/0x30 [ 32.489174] kasan_save_free_info+0x2b/0x50 [ 32.489702] __kasan_slab_free+0x10a/0x190 [ 32.490231] kmem_cache_free+0x10d/0x4d0 [ 32.490748] rcu_core+0x8c8/0x2860 [ 32.491190] __do_softirq+0x1b7/0x7d4 [ 32.491661] [ 32.491877] Last potentially related work creation: [ 32.492455] kasan_save_stack+0x22/0x50 [ 32.492953] __kasan_record_aux_stack+0x8e/0xa0 [ 32.493521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.494149] remove_vma+0x139/0x170 [ 32.494606] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.495156] do_vmi_munmap+0x1f1/0x2b0 [ 32.495634] __vm_munmap+0x138/0x3a0 [ 32.496095] __x64_sys_munmap+0x59/0x80 [ 32.496584] do_syscall_64+0x3f/0x90 [ 32.497051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.497685] [ 32.497895] The buggy address belongs to the object at ffff888019e7dd98 [ 32.497895] which belongs to the cache vm_area_struct of size 168 [ 32.499363] The buggy address is located 88 bytes inside of [ 32.499363] freed 168-byte region [ffff888019e7dd98, ffff888019e7de40) [ 32.500749] [ 32.500986] The buggy address belongs to the physical page: [ 32.501660] page:0000000048059c3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e7d [ 32.502796] memcg:ffff888006821901 [ 32.503225] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.503941] page_type: 0xffffffff() [ 32.504394] raw: 0100000000000200 ffff88800879fc80 ffffea0000679d80 dead000000000003 [ 32.505327] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006821901 [ 32.506259] page dumped because: kasan: bad access detected [ 32.506946] [ 32.507168] Memory state around the buggy address: [ 32.507749] ffff888019e7dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.508617] ffff888019e7dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.509499] >ffff888019e7dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.510381] ^ [ 32.511211] ffff888019e7de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.512088] ffff888019e7de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.512964] ================================================================== [ 32.513969] Disabling lock debugging due to kernel taint [ 34.497180] BUG: Bad rss-counter state mm:00000000a3c679f7 type:MM_FILEPAGES val:33 [ 34.498650] BUG: Bad rss-counter state mm:00000000a3c679f7 type:MM_ANONPAGES val:22 [ 35.009567] BUG: Bad rss-counter state mm:000000001d458249 type:MM_FILEPAGES val:33 [ 35.010841] BUG: Bad rss-counter state mm:000000001d458249 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35721' (ECDSA) to the list of known hosts. 2023/06/19 10:58:15 fuzzer started 2023/06/19 10:58:15 dialing manager at localhost:44161 2023/06/19 10:58:15 checking machine... 2023/06/19 10:58:15 checking revisions... [ 35.720619] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:58:15 testing simple program... [ 35.767764] cgroup: Unknown subsys name 'net' [ 35.826033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:13 Registers: info registers vcpu 0 RAX=ffffffff85d3c0a0 RBX=ffff88800e702000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffffffffffff RDI=ffff88800e702100 RBP=ffffea000074de80 RSP=ffff8880090dfa70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff88801b80a290 R13=ffff88801b80a401 R14=0000000000000001 R15=ffff88801b80a298 RIP=ffffffff81657027 RFL=00000006 [-----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 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=000055d1e3671d44 CR3=0000000005482000 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=38353a3031203931206e754a3e35333c XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303333 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009a27280 RCX=ffffffff83ab403d RDX=ffff888015d49b40 RSI=0000000000000004 RDI=ffffffff87f94e40 RBP=ffffffff87f94e40 RSP=ffff888016a9f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000b2b00000b2b R12=0000000000000000 R13=0000000000000050 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8180fd28 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 00007f54c9c69900 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=00007f54ca220618 CR3=000000001a03c000 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