syzkaller login: [ 92.466372] BUG: Bad rss-counter state mm:00000000083d3f46 type:MM_FILEPAGES val:33 [ 92.468134] BUG: Bad rss-counter state mm:00000000083d3f46 type:MM_ANONPAGES val:22 [ 92.638275] ================================================================== [ 92.639322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 92.640373] Read of size 8 at addr ffff88801580cc20 by task sshd/226 [ 92.641222] [ 92.641488] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 92.642455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 92.643538] Call Trace: [ 92.644016] [ 92.644368] dump_stack_lvl+0x91/0xf0 [ 92.644911] print_report+0xcc/0x620 [ 92.645497] ? __virt_addr_valid+0x102/0x340 [ 92.646113] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.646805] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.647490] kasan_report+0xbe/0xf0 [ 92.648018] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.648745] vma_interval_tree_remove+0xc75/0xec0 [ 92.649476] vma_prepare+0xc54/0x11a0 [ 92.650039] __split_vma+0x5af/0x950 [ 92.650593] ? __pfx___split_vma+0x10/0x10 [ 92.651213] ? find_held_lock+0x2c/0x110 [ 92.651826] do_vmi_align_munmap+0x2ba/0x11f0 [ 92.652497] ? lock_is_held_type+0x9f/0x120 [ 92.653117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 92.653837] ? mtree_range_walk+0x632/0x900 [ 92.654486] ? mas_walk+0x5c7/0x7c0 [ 92.655030] do_vmi_munmap+0x1f1/0x2b0 [ 92.655605] mmap_region+0x1f9/0x2660 [ 92.656165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 92.656769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 92.657608] ? __pfx_lock_acquire+0x10/0x10 [ 92.658241] ? __pfx_mmap_region+0x10/0x10 [ 92.658844] ? security_mmap_addr+0x7d/0xa0 [ 92.659473] ? get_unmapped_area+0x1f5/0x3f0 [ 92.660117] do_mmap+0x854/0xf00 [ 92.660637] vm_mmap_pgoff+0x1a6/0x3a0 [ 92.661220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 92.661902] ksys_mmap_pgoff+0x3af/0x500 [ 92.662501] do_syscall_64+0x3f/0x90 [ 92.663053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.663818] RIP: 0033:0x7fc3ecb33d82 [ 92.664347] 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 [ 92.666750] RSP: 002b:00007ffcdc412148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 92.667762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3ecb33d82 [ 92.668715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3ebf6d000 [ 92.669674] RBP: 00007fc3ebf6d000 R08: 0000000000000009 R09: 0000000000001000 [ 92.670626] R10: 0000000000000812 R11: 0000000000000206 R12: 000056313e433f70 [ 92.671570] R13: 00007ffcdc412160 R14: 00007ffcdc412190 R15: 00007ffcdc4124f0 [ 92.672541] [ 92.672868] [ 92.673109] Allocated by task 218: [ 92.673640] kasan_save_stack+0x22/0x50 [ 92.674227] kasan_set_track+0x25/0x30 [ 92.674806] __kasan_slab_alloc+0x59/0x70 [ 92.675409] kmem_cache_alloc+0x16b/0x370 [ 92.676006] vm_area_dup+0x20/0x160 [ 92.676531] __split_vma+0x170/0x950 [ 92.677073] split_vma+0xc6/0x110 [ 92.677623] mprotect_fixup+0x8d2/0xb30 [ 92.678211] do_mprotect_pkey+0x87e/0xd40 [ 92.678818] __x64_sys_mprotect+0x78/0xc0 [ 92.679417] do_syscall_64+0x3f/0x90 [ 92.679967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.680710] [ 92.680957] Freed by task 209: [ 92.681413] kasan_save_stack+0x22/0x50 [ 92.682019] kasan_set_track+0x25/0x30 [ 92.682592] kasan_save_free_info+0x2b/0x50 [ 92.683207] __kasan_slab_free+0x10a/0x190 [ 92.683824] kmem_cache_free+0x10d/0x4d0 [ 92.684410] rcu_core+0x8c8/0x2860 [ 92.684995] __do_softirq+0x1b7/0x7d4 [ 92.685557] [ 92.685812] Last potentially related work creation: [ 92.686494] kasan_save_stack+0x22/0x50 [ 92.687079] __kasan_record_aux_stack+0x8e/0xa0 [ 92.687744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 92.688487] remove_vma+0x139/0x170 [ 92.689007] do_vmi_align_munmap+0xd4a/0x11f0 [ 92.689663] do_vmi_munmap+0x1f1/0x2b0 [ 92.690232] __vm_munmap+0x138/0x3a0 [ 92.690782] __x64_sys_munmap+0x59/0x80 [ 92.691358] do_syscall_64+0x3f/0x90 [ 92.691910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.692655] [ 92.692909] The buggy address belongs to the object at ffff88801580cbc8 [ 92.692909] which belongs to the cache vm_area_struct of size 168 [ 92.694633] The buggy address is located 88 bytes inside of [ 92.694633] freed 168-byte region [ffff88801580cbc8, ffff88801580cc70) [ 92.696276] [ 92.696529] The buggy address belongs to the physical page: [ 92.697294] page:00000000fd58508a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1580c [ 92.698580] memcg:ffff88800e1dc201 [ 92.699077] flags: 0x100000000000200(slab|node=0|zone=1) [ 92.699833] page_type: 0xffffffff() [ 92.700356] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 92.701435] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1dc201 [ 92.702503] page dumped because: kasan: bad access detected [ 92.703285] [ 92.703537] Memory state around the buggy address: [ 92.704216] ffff88801580cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 92.705225] ffff88801580cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 92.706239] >ffff88801580cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 92.707238] ^ [ 92.707861] ffff88801580cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 92.708861] ffff88801580cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 92.709865] ================================================================== [ 92.710975] Disabling lock debugging due to kernel taint [ 94.654784] BUG: Bad rss-counter state mm:000000003480b615 type:MM_FILEPAGES val:33 [ 94.656278] BUG: Bad rss-counter state mm:000000003480b615 type:MM_ANONPAGES val:22 [ 95.079467] BUG: Bad rss-counter state mm:000000006d99db8f type:MM_FILEPAGES val:33 [ 95.080539] BUG: Bad rss-counter state mm:000000006d99db8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37446' (ECDSA) to the list of known hosts. 2023/06/19 17:14:51 fuzzer started 2023/06/19 17:14:51 dialing manager at localhost:44161 2023/06/19 17:14:51 checking machine... 2023/06/19 17:14:51 checking revisions... [ 95.839376] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:14:51 testing simple program... [ 95.886945] cgroup: Unknown subsys name 'net' [ 95.947093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:14:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800c4f6948 RCX=ffff88800c4f6948 RDX=0000000000120012 RSI=ffff88800c4f6948 RDI=ffff88800879fdc0 RBP=ffff88801460f7f8 RSP=ffff88801460f760 R8 =0000000080120011 R9 =0000000000000000 R10=ffffea0000313d80 R11=000000008011000f R12=ffffea0000313d80 R13=0000000000000000 R14=0000000000120011 R15=ffff88800879fdc0 RIP=ffffffff818094f2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f298c08b900 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=00007f298b4a3970 CR3=000000000deb8000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dce201dcf63d74a600000000000ae988 XMM05=b840c827f3f8131000000000001358d0 XMM06=6860aeb314f8829d0000000000134a18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20202000000020202020202000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002cc6f82 RSP=ffff888016637bf0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff85ba4c78 R13=ffffffff812a0f85 R14=0000000000000003 R15=0000000000000246 RIP=ffffffff8135b8e5 RFL=00000047 [---Z-PC] 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 00007f5de7d62900 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=00007f5de8319618 CR3=0000000016f7a000 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=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