syzkaller login: [ 40.673639] BUG: Bad rss-counter state mm:000000002dfe666a type:MM_FILEPAGES val:33 [ 40.674811] BUG: Bad rss-counter state mm:000000002dfe666a type:MM_ANONPAGES val:22 [ 40.715211] ================================================================== [ 40.716463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.717657] Read of size 8 at addr ffff888019d66228 by task sshd/219 [ 40.718727] [ 40.718985] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.720055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.721348] Call Trace: [ 40.721720] [ 40.722052] dump_stack_lvl+0x91/0xf0 [ 40.722616] print_report+0xcc/0x620 [ 40.723176] ? __virt_addr_valid+0x102/0x340 [ 40.723825] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.724571] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.725302] kasan_report+0xbe/0xf0 [ 40.725872] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.726623] vma_interval_tree_remove+0xc75/0xec0 [ 40.727340] vma_prepare+0xc54/0x11a0 [ 40.727938] __split_vma+0x5af/0x950 [ 40.728407] ? __pfx___split_vma+0x10/0x10 [ 40.728924] ? find_held_lock+0x2c/0x110 [ 40.729447] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.730001] ? lock_is_held_type+0x9f/0x120 [ 40.730523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.731121] ? mtree_range_walk+0x632/0x900 [ 40.731668] ? mas_walk+0x5c7/0x7c0 [ 40.732150] do_vmi_munmap+0x1f1/0x2b0 [ 40.732637] mmap_region+0x1f9/0x2660 [ 40.733110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.733614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.734309] ? __pfx_lock_acquire+0x10/0x10 [ 40.734833] ? __pfx_mmap_region+0x10/0x10 [ 40.735351] ? security_mmap_addr+0x7d/0xa0 [ 40.735882] ? get_unmapped_area+0x1f5/0x3f0 [ 40.736427] do_mmap+0x854/0xf00 [ 40.736858] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.737345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.737898] ksys_mmap_pgoff+0x3af/0x500 [ 40.738391] do_syscall_64+0x3f/0x90 [ 40.738859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.739488] RIP: 0033:0x7fc4f0a25d82 [ 40.739955] 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 [ 40.742048] RSP: 002b:00007ffd443eeff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.742933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4f0a25d82 [ 40.743762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4efe5f000 [ 40.744591] RBP: 00007fc4efe5f000 R08: 0000000000000009 R09: 0000000000001000 [ 40.745421] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a4f778b20 [ 40.746251] R13: 00007ffd443ef010 R14: 00007ffd443ef040 R15: 00007ffd443ef3a0 [ 40.747101] [ 40.747388] [ 40.747599] Allocated by task 212: [ 40.748031] kasan_save_stack+0x22/0x50 [ 40.748526] kasan_set_track+0x25/0x30 [ 40.749010] __kasan_slab_alloc+0x59/0x70 [ 40.749525] kmem_cache_alloc+0x16b/0x370 [ 40.750032] vm_area_dup+0x20/0x160 [ 40.750476] __split_vma+0x170/0x950 [ 40.750929] split_vma+0xc6/0x110 [ 40.751360] mprotect_fixup+0x8d2/0xb30 [ 40.751869] do_mprotect_pkey+0x87e/0xd40 [ 40.752376] __x64_sys_mprotect+0x78/0xc0 [ 40.752891] do_syscall_64+0x3f/0x90 [ 40.753355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.753981] [ 40.754192] Freed by task 203: [ 40.754580] kasan_save_stack+0x22/0x50 [ 40.755077] kasan_set_track+0x25/0x30 [ 40.755561] kasan_save_free_info+0x2b/0x50 [ 40.756094] __kasan_slab_free+0x10a/0x190 [ 40.756613] kmem_cache_free+0x10d/0x4d0 [ 40.757114] rcu_core+0x8c8/0x2860 [ 40.757551] __do_softirq+0x1b7/0x7d4 [ 40.758017] [ 40.758227] Last potentially related work creation: [ 40.758802] kasan_save_stack+0x22/0x50 [ 40.759295] __kasan_record_aux_stack+0x8e/0xa0 [ 40.759916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.760545] remove_vma+0x139/0x170 [ 40.760987] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.761530] do_vmi_munmap+0x1f1/0x2b0 [ 40.762004] __vm_munmap+0x138/0x3a0 [ 40.762467] __x64_sys_munmap+0x59/0x80 [ 40.762954] do_syscall_64+0x3f/0x90 [ 40.763421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.764061] [ 40.764273] The buggy address belongs to the object at ffff888019d661d0 [ 40.764273] which belongs to the cache vm_area_struct of size 168 [ 40.765712] The buggy address is located 88 bytes inside of [ 40.765712] freed 168-byte region [ffff888019d661d0, ffff888019d66278) [ 40.767147] [ 40.767364] The buggy address belongs to the physical page: [ 40.768043] page:000000003ec1837c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d66 [ 40.769158] memcg:ffff88800efcc501 [ 40.769590] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.770238] page_type: 0xffffffff() [ 40.770714] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.771642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efcc501 [ 40.772571] page dumped because: kasan: bad access detected [ 40.773240] [ 40.773456] Memory state around the buggy address: [ 40.774037] ffff888019d66100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.774899] ffff888019d66180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.775778] >ffff888019d66200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.776625] ^ [ 40.777188] ffff888019d66280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.778069] ffff888019d66300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.778924] ================================================================== [ 40.779870] Disabling lock debugging due to kernel taint [ 42.847556] BUG: Bad rss-counter state mm:00000000dfb0a015 type:MM_FILEPAGES val:33 [ 42.848821] BUG: Bad rss-counter state mm:00000000dfb0a015 type:MM_ANONPAGES val:22 [ 43.387167] BUG: Bad rss-counter state mm:00000000d6822279 type:MM_FILEPAGES val:33 [ 43.388449] BUG: Bad rss-counter state mm:00000000d6822279 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31313' (ECDSA) to the list of known hosts. 2023/06/19 14:02:27 fuzzer started 2023/06/19 14:02:27 dialing manager at localhost:44161 2023/06/19 14:02:27 checking machine... 2023/06/19 14:02:27 checking revisions... [ 44.103377] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:02:27 testing simple program... [ 44.157775] cgroup: Unknown subsys name 'net' [ 44.195691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:02:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880197f3028 RCX=0000000000000000 RDX=1ffff11001df2f90 RSI=ffffffff8189dd3a RDI=ffff88800ef97c8c RBP=ffff88800ef97c80 RSP=ffff88800ef97a90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=ffff88800ef97c88 R14=ffff88800ef97c68 R15=ffff88800ef97c48 RIP=ffffffff8189dd64 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 00007f77dacc0900 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=00007ffc4fd1b000 CR3=000000000e0fc000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2e82585a60 CR3=000000000ca02000 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=3893361d6c05a8bc594b17ba27ce2a8a XMM02=2c67c8bc2e329bc3000000000011d168 XMM03=fb795ef6d65770560000000000123f30 XMM04=3992712dbe02f4a700000000000ae988 XMM05=dfcdbad4f1609c3700000000001337f8 XMM06=0fb5519720fdd11b00000000001329d0 XMM07=e042d86d42eb936e00000000001241b0 XMM08=5d6ca197da6667e3000000000011d1c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000