syzkaller login: [ 30.094686] BUG: Bad rss-counter state mm:0000000009a360b0 type:MM_FILEPAGES val:33 [ 30.096813] BUG: Bad rss-counter state mm:0000000009a360b0 type:MM_ANONPAGES val:22 [ 30.264228] ================================================================== [ 30.265141] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.266198] Read of size 8 at addr ffff888018bad058 by task sshd/220 [ 30.267004] [ 30.267225] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.268121] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.269112] Call Trace: [ 30.269443] [ 30.269761] dump_stack_lvl+0x91/0xf0 [ 30.270259] print_report+0xcc/0x620 [ 30.270780] ? __virt_addr_valid+0x102/0x340 [ 30.271341] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.271986] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.272631] kasan_report+0xbe/0xf0 [ 30.273106] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.273770] vma_interval_tree_remove+0xc75/0xec0 [ 30.274372] vma_prepare+0xc54/0x11a0 [ 30.274880] __split_vma+0x5af/0x950 [ 30.275353] ? __pfx___split_vma+0x10/0x10 [ 30.275899] ? find_held_lock+0x2c/0x110 [ 30.276424] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.277026] ? lock_is_held_type+0x9f/0x120 [ 30.277590] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.278216] ? mtree_range_walk+0x632/0x900 [ 30.278780] ? mas_walk+0x5c7/0x7c0 [ 30.279252] do_vmi_munmap+0x1f1/0x2b0 [ 30.279770] mmap_region+0x1f9/0x2660 [ 30.280248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.280782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.281507] ? __pfx_lock_acquire+0x10/0x10 [ 30.282084] ? __pfx_mmap_region+0x10/0x10 [ 30.282635] ? security_mmap_addr+0x7d/0xa0 [ 30.283168] ? get_unmapped_area+0x1f5/0x3f0 [ 30.283738] do_mmap+0x854/0xf00 [ 30.284176] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.284688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.285257] ksys_mmap_pgoff+0x3af/0x500 [ 30.285806] do_syscall_64+0x3f/0x90 [ 30.286288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286978] RIP: 0033:0x7f3dc341fd82 [ 30.287433] 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 [ 30.289614] RSP: 002b:00007ffd9b0628f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.290549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3dc341fd82 [ 30.291408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3dc2859000 [ 30.292289] RBP: 00007f3dc2859000 R08: 0000000000000009 R09: 0000000000001000 [ 30.293162] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617b07beb20 [ 30.294067] R13: 00007ffd9b062910 R14: 00007ffd9b062940 R15: 00007ffd9b062ca0 [ 30.294947] [ 30.295237] [ 30.295454] Allocated by task 213: [ 30.295897] kasan_save_stack+0x22/0x50 [ 30.296402] kasan_set_track+0x25/0x30 [ 30.296921] __kasan_slab_alloc+0x59/0x70 [ 30.297450] kmem_cache_alloc+0x16b/0x370 [ 30.297993] vm_area_dup+0x20/0x160 [ 30.298452] __split_vma+0x170/0x950 [ 30.298944] split_vma+0xc6/0x110 [ 30.299384] mprotect_fixup+0x8d2/0xb30 [ 30.299893] do_mprotect_pkey+0x87e/0xd40 [ 30.300418] __x64_sys_mprotect+0x78/0xc0 [ 30.300951] do_syscall_64+0x3f/0x90 [ 30.301433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.302104] [ 30.302325] Freed by task 213: [ 30.302743] kasan_save_stack+0x22/0x50 [ 30.303267] kasan_set_track+0x25/0x30 [ 30.303790] kasan_save_free_info+0x2b/0x50 [ 30.304352] __kasan_slab_free+0x10a/0x190 [ 30.304924] kmem_cache_free+0x10d/0x4d0 [ 30.305457] rcu_core+0x8c8/0x2860 [ 30.305961] __do_softirq+0x1b7/0x7d4 [ 30.306457] [ 30.306693] Last potentially related work creation: [ 30.307308] kasan_save_stack+0x22/0x50 [ 30.307839] __kasan_record_aux_stack+0x8e/0xa0 [ 30.308432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.309110] remove_vma+0x139/0x170 [ 30.309598] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.310195] do_vmi_munmap+0x1f1/0x2b0 [ 30.310726] __vm_munmap+0x138/0x3a0 [ 30.311199] __x64_sys_munmap+0x59/0x80 [ 30.311705] do_syscall_64+0x3f/0x90 [ 30.312184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.312843] [ 30.313056] The buggy address belongs to the object at ffff888018bad000 [ 30.313056] which belongs to the cache vm_area_struct of size 168 [ 30.314587] The buggy address is located 88 bytes inside of [ 30.314587] freed 168-byte region [ffff888018bad000, ffff888018bad0a8) [ 30.316018] [ 30.316234] The buggy address belongs to the physical page: [ 30.316903] page:00000000c50db546 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18bad [ 30.318034] memcg:ffff88800f216301 [ 30.318469] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.319137] page_type: 0xffffffff() [ 30.319605] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.320522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f216301 [ 30.321451] page dumped because: kasan: bad access detected [ 30.322144] [ 30.322363] Memory state around the buggy address: [ 30.322960] ffff888018bacf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.323821] ffff888018bacf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.324691] >ffff888018bad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.325560] ^ [ 30.326304] ffff888018bad080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.327164] ffff888018bad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.328026] ================================================================== [ 30.329096] Disabling lock debugging due to kernel taint [ 32.328314] BUG: Bad rss-counter state mm:00000000ec74bfb0 type:MM_FILEPAGES val:33 [ 32.329388] BUG: Bad rss-counter state mm:00000000ec74bfb0 type:MM_ANONPAGES val:22 [ 32.871245] BUG: Bad rss-counter state mm:000000001d25d228 type:MM_FILEPAGES val:33 [ 32.872432] BUG: Bad rss-counter state mm:000000001d25d228 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6957' (ECDSA) to the list of known hosts. 2023/06/20 06:40:16 fuzzer started 2023/06/20 06:40:16 dialing manager at localhost:44161 2023/06/20 06:40:16 checking machine... 2023/06/20 06:40:16 checking revisions... [ 33.511289] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:40:17 testing simple program... [ 33.562588] cgroup: Unknown subsys name 'net' [ 33.632699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:40:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000039500 RCX=0000000000000000 RDX=1ffff11002bbc6d3 RSI=0000000000000004 RDI=ffff88806ce39f00 RBP=ffff88800fd8fc30 RSP=ffff88800fd8fb00 R8 =0000000000000001 R9 =ffffed1001fb1f52 R10=0000000000000003 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff888015de3680 R14=ffff88800fd8fca0 R15=ffff888019811cc0 RIP=ffffffff84516e1a RFL=00000012 [----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 00007f959a7cb900 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=00007f959ad82618 CR3=000000000e250000 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=00007f2050d15b40 CR3=000000000e0c8000 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=2036313a30343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a30343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000