syzkaller login: [ 30.726047] BUG: Bad rss-counter state mm:000000003e68419b type:MM_FILEPAGES val:33 [ 30.727505] BUG: Bad rss-counter state mm:000000003e68419b type:MM_ANONPAGES val:22 [ 30.769256] ================================================================== [ 30.770225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.771248] Read of size 8 at addr ffff88800e40d228 by task sshd/220 [ 30.772106] [ 30.772344] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.773276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.774328] Call Trace: [ 30.774672] [ 30.774985] dump_stack_lvl+0x91/0xf0 [ 30.775523] print_report+0xcc/0x620 [ 30.776088] ? __virt_addr_valid+0x102/0x340 [ 30.776685] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777354] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778009] kasan_report+0xbe/0xf0 [ 30.778518] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779189] vma_interval_tree_remove+0xc75/0xec0 [ 30.779868] vma_prepare+0xc54/0x11a0 [ 30.780397] __split_vma+0x5af/0x950 [ 30.780910] ? __pfx___split_vma+0x10/0x10 [ 30.781483] ? find_held_lock+0x2c/0x110 [ 30.782051] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782665] ? lock_is_held_type+0x9f/0x120 [ 30.783246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.783939] ? mtree_range_walk+0x632/0x900 [ 30.784542] ? mas_walk+0x5c7/0x7c0 [ 30.785059] do_vmi_munmap+0x1f1/0x2b0 [ 30.785596] mmap_region+0x1f9/0x2660 [ 30.786123] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.786676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.787449] ? __pfx_lock_acquire+0x10/0x10 [ 30.788065] ? __pfx_mmap_region+0x10/0x10 [ 30.788647] ? security_mmap_addr+0x7d/0xa0 [ 30.789227] ? get_unmapped_area+0x1f5/0x3f0 [ 30.789819] do_mmap+0x854/0xf00 [ 30.790300] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.790835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.791445] ksys_mmap_pgoff+0x3af/0x500 [ 30.792045] do_syscall_64+0x3f/0x90 [ 30.792565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793277] RIP: 0033:0x7fceb039ed82 [ 30.793772] 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 [ 30.796133] RSP: 002b:00007fff671b0998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.797118] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fceb039ed82 [ 30.798042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fceaf7d8000 [ 30.798966] RBP: 00007fceaf7d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799914] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638bee64ec0 [ 30.800833] R13: 00007fff671b09b0 R14: 00007fff671b09e0 R15: 00007fff671b0d40 [ 30.801774] [ 30.802092] [ 30.802325] Allocated by task 213: [ 30.802793] kasan_save_stack+0x22/0x50 [ 30.803341] kasan_set_track+0x25/0x30 [ 30.803917] __kasan_slab_alloc+0x59/0x70 [ 30.804484] kmem_cache_alloc+0x16b/0x370 [ 30.805042] vm_area_dup+0x20/0x160 [ 30.805537] __split_vma+0x170/0x950 [ 30.806045] split_vma+0xc6/0x110 [ 30.806518] mprotect_fixup+0x8d2/0xb30 [ 30.807061] do_mprotect_pkey+0x87e/0xd40 [ 30.807628] __x64_sys_mprotect+0x78/0xc0 [ 30.808230] do_syscall_64+0x3f/0x90 [ 30.808752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809457] [ 30.809691] Freed by task 213: [ 30.810114] kasan_save_stack+0x22/0x50 [ 30.810663] kasan_set_track+0x25/0x30 [ 30.811206] kasan_save_free_info+0x2b/0x50 [ 30.811824] __kasan_slab_free+0x10a/0x190 [ 30.812410] kmem_cache_free+0x10d/0x4d0 [ 30.812957] rcu_core+0x8c8/0x2860 [ 30.813438] __do_softirq+0x1b7/0x7d4 [ 30.813962] [ 30.814195] Last potentially related work creation: [ 30.814835] kasan_save_stack+0x22/0x50 [ 30.815381] __kasan_record_aux_stack+0x8e/0xa0 [ 30.816035] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.816744] remove_vma+0x139/0x170 [ 30.817233] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817842] do_vmi_munmap+0x1f1/0x2b0 [ 30.818374] __vm_munmap+0x138/0x3a0 [ 30.818885] __x64_sys_munmap+0x59/0x80 [ 30.819427] do_syscall_64+0x3f/0x90 [ 30.819970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820667] [ 30.820901] The buggy address belongs to the object at ffff88800e40d1d0 [ 30.820901] which belongs to the cache vm_area_struct of size 168 [ 30.822501] The buggy address is located 88 bytes inside of [ 30.822501] freed 168-byte region [ffff88800e40d1d0, ffff88800e40d278) [ 30.824066] [ 30.824301] The buggy address belongs to the physical page: [ 30.825016] page:00000000b73f1a90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe40d [ 30.826193] memcg:ffff888009432501 [ 30.826654] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.827362] page_type: 0xffffffff() [ 30.827887] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.828888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009432501 [ 30.829871] page dumped because: kasan: bad access detected [ 30.830591] [ 30.830826] Memory state around the buggy address: [ 30.831458] ffff88800e40d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.832423] ffff88800e40d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.833352] >ffff88800e40d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.834275] ^ [ 30.834883] ffff88800e40d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.835841] ffff88800e40d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.836766] ================================================================== [ 30.838044] Disabling lock debugging due to kernel taint [ 32.730248] BUG: Bad rss-counter state mm:000000005e16cc23 type:MM_FILEPAGES val:33 [ 32.731199] BUG: Bad rss-counter state mm:000000005e16cc23 type:MM_ANONPAGES val:22 [ 33.196205] BUG: Bad rss-counter state mm:000000009cf9574a type:MM_FILEPAGES val:33 [ 33.197206] BUG: Bad rss-counter state mm:000000009cf9574a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53607' (ECDSA) to the list of known hosts. 2023/06/20 18:47:46 fuzzer started 2023/06/20 18:47:47 dialing manager at localhost:36067 2023/06/20 18:47:47 checking machine... 2023/06/20 18:47:47 checking revisions... [ 33.925240] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:47:47 testing simple program... [ 33.978013] cgroup: Unknown subsys name 'net' [ 34.033925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:47:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fab29308690 CR3=000000000c69c000 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=68dd73d9601eedbb284836489ad271f7 XMM02=000000000011b140ec2efd57dc4c00df XMM03=0000000000121e487a5e330661ab4c91 XMM04=d2b0baca7168935800000000000ae988 XMM05=19e9129bd510f2350000000000131cb0 XMM06=b9667a905863dccb0000000000130b18 XMM07=e042d86d42eb936e00000000001220c8 XMM08=7a5e330661ab4c91000000000011b1a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002fe1f6c RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff856c1fc0 RBP=0000000000000001 RSP=ffff888017f0fb50 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1fc0 R15=0000000000000000 RIP=ffffffff812d8eec 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 00007f538558c900 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=00007ffec33c6000 CR3=000000000f1e8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000