syzkaller login: [ 30.602057] BUG: Bad rss-counter state mm:00000000baf5f99f type:MM_FILEPAGES val:33 [ 30.603247] BUG: Bad rss-counter state mm:00000000baf5f99f type:MM_ANONPAGES val:22 [ 30.744898] ================================================================== [ 30.745798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.746723] Read of size 8 at addr ffff88801a121df0 by task sshd/219 [ 30.747576] [ 30.747793] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.748655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.749622] Call Trace: [ 30.749938] [ 30.750220] dump_stack_lvl+0x91/0xf0 [ 30.750710] print_report+0xcc/0x620 [ 30.751191] ? __virt_addr_valid+0x102/0x340 [ 30.751735] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752343] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752979] kasan_report+0xbe/0xf0 [ 30.753450] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754065] vma_interval_tree_remove+0xc75/0xec0 [ 30.754658] vma_prepare+0xc54/0x11a0 [ 30.755143] __split_vma+0x5af/0x950 [ 30.755621] ? __pfx___split_vma+0x10/0x10 [ 30.756156] ? find_held_lock+0x2c/0x110 [ 30.756704] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.757274] ? lock_is_held_type+0x9f/0x120 [ 30.757810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.758421] ? mtree_range_walk+0x632/0x900 [ 30.758978] ? mas_walk+0x5c7/0x7c0 [ 30.759454] do_vmi_munmap+0x1f1/0x2b0 [ 30.759965] mmap_region+0x1f9/0x2660 [ 30.760456] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.760967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.761670] ? __pfx_lock_acquire+0x10/0x10 [ 30.762223] ? __pfx_mmap_region+0x10/0x10 [ 30.762742] ? security_mmap_addr+0x7d/0xa0 [ 30.763281] ? get_unmapped_area+0x1f5/0x3f0 [ 30.763843] do_mmap+0x854/0xf00 [ 30.764277] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.764793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.765363] ksys_mmap_pgoff+0x3af/0x500 [ 30.765886] do_syscall_64+0x3f/0x90 [ 30.766364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767016] RIP: 0033:0x7f75899abd82 [ 30.767473] 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 [ 30.769605] RSP: 002b:00007ffcb3014fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.770529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75899abd82 [ 30.771392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7588de5000 [ 30.772229] RBP: 00007f7588de5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.773076] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd31facb20 [ 30.773925] R13: 00007ffcb3014fd0 R14: 00007ffcb3015000 R15: 00007ffcb3015360 [ 30.774781] [ 30.775074] [ 30.775300] Allocated by task 212: [ 30.775731] kasan_save_stack+0x22/0x50 [ 30.776235] kasan_set_track+0x25/0x30 [ 30.776763] __kasan_slab_alloc+0x59/0x70 [ 30.777292] kmem_cache_alloc+0x16b/0x370 [ 30.777810] vm_area_dup+0x20/0x160 [ 30.778267] __split_vma+0x170/0x950 [ 30.778744] split_vma+0xc6/0x110 [ 30.779180] mprotect_fixup+0x8d2/0xb30 [ 30.779676] do_mprotect_pkey+0x87e/0xd40 [ 30.780200] __x64_sys_mprotect+0x78/0xc0 [ 30.780731] do_syscall_64+0x3f/0x90 [ 30.781203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781843] [ 30.782055] Freed by task 212: [ 30.782443] kasan_save_stack+0x22/0x50 [ 30.782947] kasan_set_track+0x25/0x30 [ 30.783433] kasan_save_free_info+0x2b/0x50 [ 30.783967] __kasan_slab_free+0x10a/0x190 [ 30.784500] kmem_cache_free+0x10d/0x4d0 [ 30.785005] rcu_core+0x8c8/0x2860 [ 30.785447] __do_softirq+0x1b7/0x7d4 [ 30.785919] [ 30.786131] Last potentially related work creation: [ 30.786711] kasan_save_stack+0x22/0x50 [ 30.787206] __kasan_record_aux_stack+0x8e/0xa0 [ 30.787777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.788411] remove_vma+0x139/0x170 [ 30.788879] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.789432] do_vmi_munmap+0x1f1/0x2b0 [ 30.789924] __vm_munmap+0x138/0x3a0 [ 30.790383] __x64_sys_munmap+0x59/0x80 [ 30.790872] do_syscall_64+0x3f/0x90 [ 30.791342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791975] [ 30.792190] The buggy address belongs to the object at ffff88801a121d98 [ 30.792190] which belongs to the cache vm_area_struct of size 168 [ 30.793662] The buggy address is located 88 bytes inside of [ 30.793662] freed 168-byte region [ffff88801a121d98, ffff88801a121e40) [ 30.795041] [ 30.795260] The buggy address belongs to the physical page: [ 30.795908] page:00000000f8b2c37d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a121 [ 30.796997] memcg:ffff888019d37501 [ 30.797419] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.798059] page_type: 0xffffffff() [ 30.798507] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.799425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d37501 [ 30.800324] page dumped because: kasan: bad access detected [ 30.801001] [ 30.801213] Memory state around the buggy address: [ 30.801787] ffff88801a121c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.802630] ffff88801a121d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.803471] >ffff88801a121d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804311] ^ [ 30.805116] ffff88801a121e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.805970] ffff88801a121e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.806806] ================================================================== [ 30.808068] Disabling lock debugging due to kernel taint [ 32.746979] BUG: Bad rss-counter state mm:000000004dbe7374 type:MM_FILEPAGES val:33 [ 32.748142] BUG: Bad rss-counter state mm:000000004dbe7374 type:MM_ANONPAGES val:22 [ 33.192860] BUG: Bad rss-counter state mm:0000000050f341be type:MM_FILEPAGES val:33 [ 33.193987] BUG: Bad rss-counter state mm:0000000050f341be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64826' (ECDSA) to the list of known hosts. 2023/06/20 22:14:33 fuzzer started 2023/06/20 22:14:34 dialing manager at localhost:36067 2023/06/20 22:14:34 checking machine... 2023/06/20 22:14:34 checking revisions... [ 33.909350] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:14:34 testing simple program... [ 33.953443] cgroup: Unknown subsys name 'net' [ 34.001362] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:14:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=1ffff11002cba3e7 RSI=0000000000000008 RDI=ffff8880165d1f38 RBP=ffff8880165d1b40 RSP=ffff88806ce09d50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880165d1b40 R13=dffffc0000000000 R14=ffff88800d9f7290 R15=0000000000000001 RIP=ffffffff81374562 RFL=00000216 [----AP-] 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 00007f45965b5900 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=00007f4596b6c618 CR3=000000000eb6c000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff9333c8b8 CR3=000000000de66000 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=2033333a34313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a34313a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000