syzkaller login: [ 32.252269] BUG: Bad rss-counter state mm:000000008da638d6 type:MM_FILEPAGES val:33 [ 32.253287] BUG: Bad rss-counter state mm:000000008da638d6 type:MM_ANONPAGES val:22 [ 32.419891] ================================================================== [ 32.420814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.421782] Read of size 8 at addr ffff8880144f2058 by task sshd/220 [ 32.422572] [ 32.422792] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.423842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.424845] Call Trace: [ 32.425175] [ 32.425486] dump_stack_lvl+0x91/0xf0 [ 32.425986] print_report+0xcc/0x620 [ 32.426472] ? __virt_addr_valid+0x102/0x340 [ 32.427036] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.427682] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.428305] kasan_report+0xbe/0xf0 [ 32.428789] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.429417] vma_interval_tree_remove+0xc75/0xec0 [ 32.430030] vma_prepare+0xc54/0x11a0 [ 32.430510] __split_vma+0x5af/0x950 [ 32.430986] ? __pfx___split_vma+0x10/0x10 [ 32.431518] ? find_held_lock+0x2c/0x110 [ 32.432060] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.432634] ? lock_is_held_type+0x9f/0x120 [ 32.433174] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.433783] ? mtree_range_walk+0x632/0x900 [ 32.434339] ? mas_walk+0x5c7/0x7c0 [ 32.434820] do_vmi_munmap+0x1f1/0x2b0 [ 32.435312] mmap_region+0x1f9/0x2660 [ 32.435816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.436333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.437052] ? __pfx_lock_acquire+0x10/0x10 [ 32.437584] ? __pfx_mmap_region+0x10/0x10 [ 32.438116] ? security_mmap_addr+0x7d/0xa0 [ 32.438646] ? get_unmapped_area+0x1f5/0x3f0 [ 32.439214] do_mmap+0x854/0xf00 [ 32.439666] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.440165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.440736] ksys_mmap_pgoff+0x3af/0x500 [ 32.441245] do_syscall_64+0x3f/0x90 [ 32.441729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.442392] RIP: 0033:0x7fd212363d82 [ 32.442860] 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 [ 32.445052] RSP: 002b:00007fff6243c6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.445976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd212363d82 [ 32.446828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd21179d000 [ 32.447688] RBP: 00007fd21179d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.448544] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bd0659ec0 [ 32.449384] R13: 00007fff6243c6d0 R14: 00007fff6243c700 R15: 00007fff6243ca60 [ 32.450246] [ 32.450542] [ 32.450761] Allocated by task 213: [ 32.451193] kasan_save_stack+0x22/0x50 [ 32.451716] kasan_set_track+0x25/0x30 [ 32.452220] __kasan_slab_alloc+0x59/0x70 [ 32.452750] kmem_cache_alloc+0x16b/0x370 [ 32.453277] vm_area_dup+0x20/0x160 [ 32.453729] __split_vma+0x170/0x950 [ 32.454198] split_vma+0xc6/0x110 [ 32.454643] mprotect_fixup+0x8d2/0xb30 [ 32.455149] do_mprotect_pkey+0x87e/0xd40 [ 32.455696] __x64_sys_mprotect+0x78/0xc0 [ 32.456223] do_syscall_64+0x3f/0x90 [ 32.456696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.457354] [ 32.457573] Freed by task 19: [ 32.457959] kasan_save_stack+0x22/0x50 [ 32.458466] kasan_set_track+0x25/0x30 [ 32.458966] kasan_save_free_info+0x2b/0x50 [ 32.459504] __kasan_slab_free+0x10a/0x190 [ 32.460061] kmem_cache_free+0x10d/0x4d0 [ 32.460573] rcu_core+0x8c8/0x2860 [ 32.461024] __do_softirq+0x1b7/0x7d4 [ 32.461508] [ 32.461722] Last potentially related work creation: [ 32.462317] kasan_save_stack+0x22/0x50 [ 32.462823] __kasan_record_aux_stack+0x8e/0xa0 [ 32.463396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.464046] remove_vma+0x139/0x170 [ 32.464599] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.465163] do_vmi_munmap+0x1f1/0x2b0 [ 32.465656] __vm_munmap+0x138/0x3a0 [ 32.466124] __x64_sys_munmap+0x59/0x80 [ 32.466623] do_syscall_64+0x3f/0x90 [ 32.467102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.467759] [ 32.467975] The buggy address belongs to the object at ffff8880144f2000 [ 32.467975] which belongs to the cache vm_area_struct of size 168 [ 32.469456] The buggy address is located 88 bytes inside of [ 32.469456] freed 168-byte region [ffff8880144f2000, ffff8880144f20a8) [ 32.470875] [ 32.471091] The buggy address belongs to the physical page: [ 32.471753] page:00000000366cf5cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144f2 [ 32.472852] memcg:ffff8880144f3001 [ 32.473286] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.473945] page_type: 0xffffffff() [ 32.474400] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.475323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144f3001 [ 32.476261] page dumped because: kasan: bad access detected [ 32.476932] [ 32.477148] Memory state around the buggy address: [ 32.477733] ffff8880144f1f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.478593] ffff8880144f1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.479451] >ffff8880144f2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.480314] ^ [ 32.481054] ffff8880144f2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.481910] ffff8880144f2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.482766] ================================================================== [ 32.483722] Disabling lock debugging due to kernel taint [ 34.541454] BUG: Bad rss-counter state mm:000000002b9c7984 type:MM_FILEPAGES val:33 [ 34.542422] BUG: Bad rss-counter state mm:000000002b9c7984 type:MM_ANONPAGES val:22 [ 35.020870] BUG: Bad rss-counter state mm:000000001a0f5188 type:MM_FILEPAGES val:33 [ 35.021855] BUG: Bad rss-counter state mm:000000001a0f5188 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38927' (ECDSA) to the list of known hosts. 2023/06/19 14:32:44 fuzzer started 2023/06/19 14:32:45 dialing manager at localhost:44161 2023/06/19 14:32:45 checking machine... 2023/06/19 14:32:45 checking revisions... [ 35.762261] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:32:45 testing simple program... [ 35.812233] cgroup: Unknown subsys name 'net' [ 35.873773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:32:43 Registers: info registers vcpu 0 RAX=1ffff11001767085 RBX=ffff88800bb383f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800bb38428 RBP=ffff8880100319f8 RSP=ffff888018267888 R8 =0000000000000001 R9 =ffffed100304cf05 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800c92a400 R14=ffffffff83677d2f R15=ffff88800db14f00 RIP=ffffffff81846362 RFL=00000046 [---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 00007fc0a2b44700 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=00007ff148460a20 CR3=000000000c708000 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=63736964203a31313a32333837332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323338 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=dffffc0000000000 RBX=ffff88806cf09a70 RCX=0000000000000002 RDX=1ffff1100d9e1350 RSI=ffff88806cf09dd8 RDI=ffff88806cf09a80 RBP=ffff88806cf09dd8 RSP=ffff88806cf099c8 R8 =ffffffff86137cb0 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09de0 R15=ffff88806cf09a70 RIP=ffffffff81130468 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 00007f0f7024e900 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=00007f0f7022d020 CR3=0000000018294000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000