syzkaller login: [ 41.917366] BUG: Bad rss-counter state mm:00000000b91e72d7 type:MM_FILEPAGES val:33 [ 41.918590] BUG: Bad rss-counter state mm:00000000b91e72d7 type:MM_ANONPAGES val:22 [ 42.067309] ================================================================== [ 42.068192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.069122] Read of size 8 at addr ffff88801a2b65c8 by task sshd/218 [ 42.069881] [ 42.070097] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.071061] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.072045] Call Trace: [ 42.072360] [ 42.072649] dump_stack_lvl+0x91/0xf0 [ 42.073143] print_report+0xcc/0x620 [ 42.073643] ? __virt_addr_valid+0x102/0x340 [ 42.074198] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.074821] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.075457] kasan_report+0xbe/0xf0 [ 42.075936] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.076553] vma_interval_tree_remove+0xc75/0xec0 [ 42.077152] vma_prepare+0xc54/0x11a0 [ 42.077631] __split_vma+0x5af/0x950 [ 42.078099] ? __pfx___split_vma+0x10/0x10 [ 42.078620] ? find_held_lock+0x2c/0x110 [ 42.079155] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.079722] ? lock_is_held_type+0x9f/0x120 [ 42.080258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.080861] ? mtree_range_walk+0x632/0x900 [ 42.081408] ? mas_walk+0x5c7/0x7c0 [ 42.081891] do_vmi_munmap+0x1f1/0x2b0 [ 42.082383] mmap_region+0x1f9/0x2660 [ 42.082862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.083379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.084084] ? __pfx_lock_acquire+0x10/0x10 [ 42.084614] ? __pfx_mmap_region+0x10/0x10 [ 42.085142] ? security_mmap_addr+0x7d/0xa0 [ 42.085667] ? get_unmapped_area+0x1f5/0x3f0 [ 42.086216] do_mmap+0x854/0xf00 [ 42.086650] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.087165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.087719] ksys_mmap_pgoff+0x3af/0x500 [ 42.088219] do_syscall_64+0x3f/0x90 [ 42.088698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.089347] RIP: 0033:0x7ff81852bd82 [ 42.089799] 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 [ 42.091920] RSP: 002b:00007ffc076fc768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.092821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff81852bd82 [ 42.093668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff817965000 [ 42.094517] RBP: 00007ff817965000 R08: 0000000000000009 R09: 0000000000001000 [ 42.095358] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582472f4ec0 [ 42.096204] R13: 00007ffc076fc780 R14: 00007ffc076fc7b0 R15: 00007ffc076fcb10 [ 42.097061] [ 42.097354] [ 42.097566] Allocated by task 211: [ 42.097990] kasan_save_stack+0x22/0x50 [ 42.098490] kasan_set_track+0x25/0x30 [ 42.098991] __kasan_slab_alloc+0x59/0x70 [ 42.099516] kmem_cache_alloc+0x16b/0x370 [ 42.100027] vm_area_dup+0x20/0x160 [ 42.100476] __split_vma+0x170/0x950 [ 42.100943] split_vma+0xc6/0x110 [ 42.101382] mprotect_fixup+0x8d2/0xb30 [ 42.101884] do_mprotect_pkey+0x87e/0xd40 [ 42.102401] __x64_sys_mprotect+0x78/0xc0 [ 42.102914] do_syscall_64+0x3f/0x90 [ 42.103390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.104031] [ 42.104243] Freed by task 211: [ 42.104636] kasan_save_stack+0x22/0x50 [ 42.105138] kasan_set_track+0x25/0x30 [ 42.105631] kasan_save_free_info+0x2b/0x50 [ 42.106157] __kasan_slab_free+0x10a/0x190 [ 42.106687] kmem_cache_free+0x10d/0x4d0 [ 42.107202] rcu_core+0x8c8/0x2860 [ 42.107643] __do_softirq+0x1b7/0x7d4 [ 42.108125] [ 42.108342] Last potentially related work creation: [ 42.108929] kasan_save_stack+0x22/0x50 [ 42.109431] __kasan_record_aux_stack+0x8e/0xa0 [ 42.109998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.110636] remove_vma+0x139/0x170 [ 42.111099] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.111652] do_vmi_munmap+0x1f1/0x2b0 [ 42.112134] __vm_munmap+0x138/0x3a0 [ 42.112598] __x64_sys_munmap+0x59/0x80 [ 42.113095] do_syscall_64+0x3f/0x90 [ 42.113561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.114197] [ 42.114410] The buggy address belongs to the object at ffff88801a2b6570 [ 42.114410] which belongs to the cache vm_area_struct of size 168 [ 42.115893] The buggy address is located 88 bytes inside of [ 42.115893] freed 168-byte region [ffff88801a2b6570, ffff88801a2b6618) [ 42.117290] [ 42.117509] The buggy address belongs to the physical page: [ 42.118162] page:00000000fe9a5f27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2b6 [ 42.119258] memcg:ffff88800d0cd201 [ 42.119683] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.120333] page_type: 0xffffffff() [ 42.120780] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.121696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0cd201 [ 42.122595] page dumped because: kasan: bad access detected [ 42.123279] [ 42.123492] Memory state around the buggy address: [ 42.124068] ffff88801a2b6480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.124924] ffff88801a2b6500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 42.125774] >ffff88801a2b6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.126615] ^ [ 42.127287] ffff88801a2b6600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 42.128136] ffff88801a2b6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.128980] ================================================================== [ 42.130030] Disabling lock debugging due to kernel taint [ 44.439388] BUG: Bad rss-counter state mm:00000000cb5d43c7 type:MM_FILEPAGES val:33 [ 44.440404] BUG: Bad rss-counter state mm:00000000cb5d43c7 type:MM_ANONPAGES val:22 [ 44.971597] BUG: Bad rss-counter state mm:0000000026d72b74 type:MM_FILEPAGES val:33 [ 44.972759] BUG: Bad rss-counter state mm:0000000026d72b74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65489' (ECDSA) to the list of known hosts. 2023/06/19 15:52:31 fuzzer started 2023/06/19 15:52:31 dialing manager at localhost:44161 2023/06/19 15:52:31 checking machine... 2023/06/19 15:52:31 checking revisions... [ 45.592636] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:52:32 testing simple program... [ 45.634425] cgroup: Unknown subsys name 'net' [ 45.694029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:52:26 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000004 RSI=ffffffff84905e40 RDI=ffff88801b43c300 RBP=ffff88801b43c2f0 RSP=ffff88800fecfd40 R8 =0000000000000003 R9 =0000000000000000 R10=ffff88801b43c293 R11=0000000000000000 R12=ffffffff85b5e328 R13=0000000000000000 R14=ffffffff87b67200 R15=0000000000000000 RIP=ffffffff812db2cc RFL=00000297 [--S-APC] 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 00007f5e7b0c0900 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=00007f5e7b677618 CR3=000000001685c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffd8bebe7b8 CR3=000000000e40c000 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=2031333a32353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000