syzkaller login: [ 31.110209] BUG: Bad rss-counter state mm:000000007de7bf1f type:MM_FILEPAGES val:33 [ 31.111339] BUG: Bad rss-counter state mm:000000007de7bf1f type:MM_ANONPAGES val:22 [ 31.290192] ================================================================== [ 31.291273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.292407] Read of size 8 at addr ffff888019f72140 by task sshd/219 [ 31.293232] [ 31.293470] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.294432] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.295481] Call Trace: [ 31.295828] [ 31.296140] dump_stack_lvl+0x91/0xf0 [ 31.296677] print_report+0xcc/0x620 [ 31.297207] ? __virt_addr_valid+0x102/0x340 [ 31.297806] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299163] kasan_report+0xbe/0xf0 [ 31.299673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300353] vma_interval_tree_remove+0xc75/0xec0 [ 31.301008] vma_prepare+0xc54/0x11a0 [ 31.301535] __split_vma+0x5af/0x950 [ 31.302068] ? __pfx___split_vma+0x10/0x10 [ 31.302657] ? find_held_lock+0x2c/0x110 [ 31.303225] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.303843] ? lock_is_held_type+0x9f/0x120 [ 31.304433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.305094] ? mtree_range_walk+0x632/0x900 [ 31.305698] ? mas_walk+0x5c7/0x7c0 [ 31.306232] do_vmi_munmap+0x1f1/0x2b0 [ 31.306769] mmap_region+0x1f9/0x2660 [ 31.307298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.307860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.308644] ? __pfx_lock_acquire+0x10/0x10 [ 31.309234] ? __pfx_mmap_region+0x10/0x10 [ 31.309809] ? security_mmap_addr+0x7d/0xa0 [ 31.310406] ? get_unmapped_area+0x1f5/0x3f0 [ 31.311007] do_mmap+0x854/0xf00 [ 31.311490] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.312033] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.312647] ksys_mmap_pgoff+0x3af/0x500 [ 31.313203] do_syscall_64+0x3f/0x90 [ 31.313730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314466] RIP: 0033:0x7f8730ef6d82 [ 31.314964] 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 [ 31.317298] RSP: 002b:00007ffc7a136258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.318296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8730ef6d82 [ 31.319215] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8730330000 [ 31.320134] RBP: 00007f8730330000 R08: 0000000000000009 R09: 0000000000001000 [ 31.321047] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c06c203ec0 [ 31.321990] R13: 00007ffc7a136270 R14: 00007ffc7a1362a0 R15: 00007ffc7a136600 [ 31.322911] [ 31.323224] [ 31.323460] Allocated by task 212: [ 31.323922] kasan_save_stack+0x22/0x50 [ 31.324472] kasan_set_track+0x25/0x30 [ 31.325010] __kasan_slab_alloc+0x59/0x70 [ 31.325578] kmem_cache_alloc+0x16b/0x370 [ 31.326149] vm_area_dup+0x20/0x160 [ 31.326641] __split_vma+0x170/0x950 [ 31.327147] split_vma+0xc6/0x110 [ 31.327622] mprotect_fixup+0x8d2/0xb30 [ 31.328172] do_mprotect_pkey+0x87e/0xd40 [ 31.328734] __x64_sys_mprotect+0x78/0xc0 [ 31.329296] do_syscall_64+0x3f/0x90 [ 31.329815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330525] [ 31.330758] Freed by task 19: [ 31.331169] kasan_save_stack+0x22/0x50 [ 31.331713] kasan_set_track+0x25/0x30 [ 31.332251] kasan_save_free_info+0x2b/0x50 [ 31.332825] __kasan_slab_free+0x10a/0x190 [ 31.333406] kmem_cache_free+0x10d/0x4d0 [ 31.333978] rcu_core+0x8c8/0x2860 [ 31.334461] __do_softirq+0x1b7/0x7d4 [ 31.334987] [ 31.335224] Last potentially related work creation: [ 31.335858] kasan_save_stack+0x22/0x50 [ 31.336410] __kasan_record_aux_stack+0x8e/0xa0 [ 31.337030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.337721] remove_vma+0x139/0x170 [ 31.338214] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.338822] do_vmi_munmap+0x1f1/0x2b0 [ 31.339343] __vm_munmap+0x138/0x3a0 [ 31.339839] __x64_sys_munmap+0x59/0x80 [ 31.340374] do_syscall_64+0x3f/0x90 [ 31.340879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.341576] [ 31.341809] The buggy address belongs to the object at ffff888019f720e8 [ 31.341809] which belongs to the cache vm_area_struct of size 168 [ 31.343375] The buggy address is located 88 bytes inside of [ 31.343375] freed 168-byte region [ffff888019f720e8, ffff888019f72190) [ 31.344892] [ 31.345126] The buggy address belongs to the physical page: [ 31.345849] page:00000000befdc414 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f72 [ 31.347062] memcg:ffff888019fec801 [ 31.347535] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.348235] page_type: 0xffffffff() [ 31.348732] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.349740] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fec801 [ 31.350739] page dumped because: kasan: bad access detected [ 31.351467] [ 31.351712] Memory state around the buggy address: [ 31.352339] ffff888019f72000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.353293] ffff888019f72080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.354230] >ffff888019f72100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.355163] ^ [ 31.355843] ffff888019f72180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.356732] ffff888019f72200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.357617] ================================================================== [ 31.358781] Disabling lock debugging due to kernel taint [ 32.877204] BUG: Bad rss-counter state mm:0000000049c2296d type:MM_FILEPAGES val:33 [ 32.878214] BUG: Bad rss-counter state mm:0000000049c2296d type:MM_ANONPAGES val:22 [ 33.368986] BUG: Bad rss-counter state mm:00000000a8742430 type:MM_FILEPAGES val:33 [ 33.370081] BUG: Bad rss-counter state mm:00000000a8742430 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14594' (ECDSA) to the list of known hosts. 2023/06/20 19:35:03 fuzzer started 2023/06/20 19:35:04 dialing manager at localhost:36067 2023/06/20 19:35:04 checking machine... 2023/06/20 19:35:04 checking revisions... [ 34.113626] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:35:04 testing simple program... [ 34.161399] cgroup: Unknown subsys name 'net' [ 34.211651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:35:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff888016a6f5e8 RDX=1ffff11002d4deb4 RSI=1ffff11002d4deab RDI=ffff888016a6f548 RBP=ffff888016a6f5a0 RSP=ffff888016a6f488 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888016a6f548 R11=00000000000b6a61 R12=ffffed1002d4deab R13=ffffed1002d4deaa R14=ffff888016a6f590 R15=ffff888016a6f548 RIP=ffffffff8113062c 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 00007f0d5d61e700 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=00007f3ad547d700 CR3=00000000098bc000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32373436352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323734 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=ffff88800c670001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800c66fe01 RSI=ffff88800c66fe08 RDI=ffff88806cf09a60 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff863b40b6 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008ab47 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88800c66fe10 R15=ffff88806cf09a50 RIP=ffffffff81131039 RFL=00000202 [-------] 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 00007fa328f5c900 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=00007ffea11fe000 CR3=0000000019c0a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000