syzkaller login: [ 36.484534] BUG: Bad rss-counter state mm:00000000c7597de4 type:MM_FILEPAGES val:33 [ 36.485918] BUG: Bad rss-counter state mm:00000000c7597de4 type:MM_ANONPAGES val:22 [ 36.527168] ================================================================== [ 36.528109] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.529140] Read of size 8 at addr ffff888018786d08 by task sshd/220 [ 36.529944] [ 36.530161] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.531026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.532039] Call Trace: [ 36.532356] [ 36.532639] dump_stack_lvl+0x91/0xf0 [ 36.533125] print_report+0xcc/0x620 [ 36.533626] ? __virt_addr_valid+0x102/0x340 [ 36.534186] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.534813] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.535448] kasan_report+0xbe/0xf0 [ 36.535923] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.536539] vma_interval_tree_remove+0xc75/0xec0 [ 36.537133] vma_prepare+0xc54/0x11a0 [ 36.537622] __split_vma+0x5af/0x950 [ 36.538096] ? __pfx___split_vma+0x10/0x10 [ 36.538616] ? find_held_lock+0x2c/0x110 [ 36.539141] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.539708] ? lock_is_held_type+0x9f/0x120 [ 36.540244] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.540843] ? mtree_range_walk+0x632/0x900 [ 36.541409] ? mas_walk+0x5c7/0x7c0 [ 36.541877] do_vmi_munmap+0x1f1/0x2b0 [ 36.542363] mmap_region+0x1f9/0x2660 [ 36.542840] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.543351] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.544059] ? __pfx_lock_acquire+0x10/0x10 [ 36.544589] ? __pfx_mmap_region+0x10/0x10 [ 36.545114] ? security_mmap_addr+0x7d/0xa0 [ 36.545648] ? get_unmapped_area+0x1f5/0x3f0 [ 36.546204] do_mmap+0x854/0xf00 [ 36.546656] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.547164] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.547743] ksys_mmap_pgoff+0x3af/0x500 [ 36.548265] do_syscall_64+0x3f/0x90 [ 36.548764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.549449] RIP: 0033:0x7f2c94aa5d82 [ 36.549928] 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 [ 36.552122] RSP: 002b:00007ffc46182928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.553055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c94aa5d82 [ 36.553935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c93edf000 [ 36.554801] RBP: 00007f2c93edf000 R08: 0000000000000009 R09: 0000000000001000 [ 36.555680] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3adc42ec0 [ 36.556547] R13: 00007ffc46182940 R14: 00007ffc46182970 R15: 00007ffc46182cd0 [ 36.557457] [ 36.557759] [ 36.557976] Allocated by task 213: [ 36.558412] kasan_save_stack+0x22/0x50 [ 36.558937] kasan_set_track+0x25/0x30 [ 36.559445] __kasan_slab_alloc+0x59/0x70 [ 36.559990] kmem_cache_alloc+0x16b/0x370 [ 36.560516] vm_area_dup+0x20/0x160 [ 36.560988] __split_vma+0x170/0x950 [ 36.561476] split_vma+0xc6/0x110 [ 36.561935] mprotect_fixup+0x8d2/0xb30 [ 36.562456] do_mprotect_pkey+0x87e/0xd40 [ 36.562995] __x64_sys_mprotect+0x78/0xc0 [ 36.563533] do_syscall_64+0x3f/0x90 [ 36.564023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.564680] [ 36.564899] Freed by task 213: [ 36.565309] kasan_save_stack+0x22/0x50 [ 36.565829] kasan_set_track+0x25/0x30 [ 36.566332] kasan_save_free_info+0x2b/0x50 [ 36.566904] __kasan_slab_free+0x10a/0x190 [ 36.567448] kmem_cache_free+0x10d/0x4d0 [ 36.567923] rcu_core+0x8c8/0x2860 [ 36.568344] __do_softirq+0x1b7/0x7d4 [ 36.568793] [ 36.569000] Last potentially related work creation: [ 36.569580] kasan_save_stack+0x22/0x50 [ 36.570059] __kasan_record_aux_stack+0x8e/0xa0 [ 36.570599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.571203] remove_vma+0x139/0x170 [ 36.571629] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.572154] do_vmi_munmap+0x1f1/0x2b0 [ 36.572609] __vm_munmap+0x138/0x3a0 [ 36.573053] __x64_sys_munmap+0x59/0x80 [ 36.573529] do_syscall_64+0x3f/0x90 [ 36.573978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.574579] [ 36.574781] The buggy address belongs to the object at ffff888018786cb0 [ 36.574781] which belongs to the cache vm_area_struct of size 168 [ 36.576145] The buggy address is located 88 bytes inside of [ 36.576145] freed 168-byte region [ffff888018786cb0, ffff888018786d58) [ 36.577465] [ 36.577673] The buggy address belongs to the physical page: [ 36.578292] page:0000000033661e3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18786 [ 36.579308] memcg:ffff88800eebb601 [ 36.579711] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.580316] page_type: 0xffffffff() [ 36.580742] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.581626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eebb601 [ 36.582473] page dumped because: kasan: bad access detected [ 36.583088] [ 36.583290] Memory state around the buggy address: [ 36.583833] ffff888018786c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.584632] ffff888018786c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.585442] >ffff888018786d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.586237] ^ [ 36.586650] ffff888018786d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.587444] ffff888018786e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.588238] ================================================================== [ 36.589281] Disabling lock debugging due to kernel taint [ 38.637036] BUG: Bad rss-counter state mm:00000000642afaf5 type:MM_FILEPAGES val:33 [ 38.637601] BUG: Bad rss-counter state mm:00000000642afaf5 type:MM_ANONPAGES val:22 [ 39.194238] BUG: Bad rss-counter state mm:00000000214f64dc type:MM_FILEPAGES val:33 [ 39.195450] BUG: Bad rss-counter state mm:00000000214f64dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50724' (ECDSA) to the list of known hosts. 2023/06/20 03:41:44 fuzzer started 2023/06/20 03:41:45 dialing manager at localhost:44161 2023/06/20 03:41:45 checking machine... 2023/06/20 03:41:45 checking revisions... [ 39.866203] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:41:45 testing simple program... [ 39.920499] cgroup: Unknown subsys name 'net' [ 39.961815] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:41:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015867578 RCX=0000000000000001 RDX=1ffff11002b0ceb0 RSI=ffffffff83643857 RDI=ffff888015867580 RBP=000000000000000b RSP=ffff888015867490 R8 =0000000000000001 R9 =ffff8880158674f0 R10=0000000000038001 R11=000000000008ab76 R12=ffff888015867578 R13=0000000000000000 R14=ffff888006ae51c0 R15=ffff888015867d36 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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 00007fcdc3958900 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=00007fcdc2db9930 CR3=000000000ca26000 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=23f9bdf4fb62476800000000000ae988 XMM05=6bb97fc1c9b11cff0000000000135ba0 XMM06=22347fd12a4c858f0000000000134940 XMM07=fb795ef6d65770560000000000124e80 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb2f15 RBX=ffffffff85d978a8 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d978a8 RSP=ffff88806cf099e0 R8 =ffffffff8609fada R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d978a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fcab9156900 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=00007fcab970d618 CR3=000000000e76e000 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=563412feff00545000000000000080fe 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