syzkaller login: [ 30.516087] BUG: Bad rss-counter state mm:00000000d3cd8f6f type:MM_FILEPAGES val:33 [ 30.517415] BUG: Bad rss-counter state mm:00000000d3cd8f6f type:MM_ANONPAGES val:22 [ 30.677233] ================================================================== [ 30.678142] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.679067] Read of size 8 at addr ffff888016c7b880 by task sshd/219 [ 30.679829] [ 30.680043] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.680977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.681967] Call Trace: [ 30.682299] [ 30.682576] dump_stack_lvl+0x91/0xf0 [ 30.683069] print_report+0xcc/0x620 [ 30.683551] ? __virt_addr_valid+0x102/0x340 [ 30.684104] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.684720] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.685333] kasan_report+0xbe/0xf0 [ 30.685801] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.686468] vma_interval_tree_remove+0xc75/0xec0 [ 30.687079] vma_prepare+0xc54/0x11a0 [ 30.687553] __split_vma+0x5af/0x950 [ 30.688031] ? __pfx___split_vma+0x10/0x10 [ 30.688560] ? find_held_lock+0x2c/0x110 [ 30.689083] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.689649] ? lock_is_held_type+0x9f/0x120 [ 30.690199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.690810] ? mtree_range_walk+0x632/0x900 [ 30.691359] ? mas_walk+0x5c7/0x7c0 [ 30.691833] do_vmi_munmap+0x1f1/0x2b0 [ 30.692317] mmap_region+0x1f9/0x2660 [ 30.692801] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.693319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.694043] ? __pfx_lock_acquire+0x10/0x10 [ 30.694570] ? __pfx_mmap_region+0x10/0x10 [ 30.695100] ? security_mmap_addr+0x7d/0xa0 [ 30.695626] ? get_unmapped_area+0x1f5/0x3f0 [ 30.696170] do_mmap+0x854/0xf00 [ 30.696607] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.697097] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.697659] ksys_mmap_pgoff+0x3af/0x500 [ 30.698172] do_syscall_64+0x3f/0x90 [ 30.698659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699302] RIP: 0033:0x7fba65113d82 [ 30.699753] 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 [ 30.701862] RSP: 002b:00007fffe6c44d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.702774] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba65113d82 [ 30.703612] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba6454d000 [ 30.704447] RBP: 00007fba6454d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.705274] R10: 0000000000000812 R11: 0000000000000206 R12: 000056536a887ec0 [ 30.706117] R13: 00007fffe6c44d50 R14: 00007fffe6c44d80 R15: 00007fffe6c450e0 [ 30.706962] [ 30.707251] [ 30.707466] Allocated by task 212: [ 30.707894] kasan_save_stack+0x22/0x50 [ 30.708398] kasan_set_track+0x25/0x30 [ 30.708887] __kasan_slab_alloc+0x59/0x70 [ 30.709406] kmem_cache_alloc+0x16b/0x370 [ 30.709930] vm_area_dup+0x20/0x160 [ 30.710380] __split_vma+0x170/0x950 [ 30.710844] split_vma+0xc6/0x110 [ 30.711276] mprotect_fixup+0x8d2/0xb30 [ 30.711767] do_mprotect_pkey+0x87e/0xd40 [ 30.712286] __x64_sys_mprotect+0x78/0xc0 [ 30.712803] do_syscall_64+0x3f/0x90 [ 30.713274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.713924] [ 30.714141] Freed by task 212: [ 30.714528] kasan_save_stack+0x22/0x50 [ 30.715023] kasan_set_track+0x25/0x30 [ 30.715529] kasan_save_free_info+0x2b/0x50 [ 30.716058] __kasan_slab_free+0x10a/0x190 [ 30.716586] kmem_cache_free+0x10d/0x4d0 [ 30.717087] rcu_core+0x8c8/0x2860 [ 30.717523] __do_softirq+0x1b7/0x7d4 [ 30.718003] [ 30.718220] Last potentially related work creation: [ 30.718798] kasan_save_stack+0x22/0x50 [ 30.719294] __kasan_record_aux_stack+0x8e/0xa0 [ 30.719860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.720508] remove_vma+0x139/0x170 [ 30.720962] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.721525] do_vmi_munmap+0x1f1/0x2b0 [ 30.722025] __vm_munmap+0x138/0x3a0 [ 30.722487] __x64_sys_munmap+0x59/0x80 [ 30.722975] do_syscall_64+0x3f/0x90 [ 30.723447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724081] [ 30.724293] The buggy address belongs to the object at ffff888016c7b828 [ 30.724293] which belongs to the cache vm_area_struct of size 168 [ 30.725737] The buggy address is located 88 bytes inside of [ 30.725737] freed 168-byte region [ffff888016c7b828, ffff888016c7b8d0) [ 30.727126] [ 30.727346] The buggy address belongs to the physical page: [ 30.728010] page:000000004cda6077 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c7b [ 30.729097] memcg:ffff88800fa4ad01 [ 30.729516] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.730163] page_type: 0xffffffff() [ 30.730608] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.731525] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fa4ad01 [ 30.732421] page dumped because: kasan: bad access detected [ 30.733089] [ 30.733305] Memory state around the buggy address: [ 30.733891] ffff888016c7b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.734737] ffff888016c7b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.735587] >ffff888016c7b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.736433] ^ [ 30.736847] ffff888016c7b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.737691] ffff888016c7b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.738542] ================================================================== [ 30.739821] Disabling lock debugging due to kernel taint [ 32.711989] BUG: Bad rss-counter state mm:00000000aa0c7405 type:MM_FILEPAGES val:33 [ 32.713183] BUG: Bad rss-counter state mm:00000000aa0c7405 type:MM_ANONPAGES val:22 [ 33.140186] BUG: Bad rss-counter state mm:0000000007b16193 type:MM_FILEPAGES val:33 [ 33.141383] BUG: Bad rss-counter state mm:0000000007b16193 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64026' (ECDSA) to the list of known hosts. 2023/06/21 10:14:08 fuzzer started 2023/06/21 10:14:09 dialing manager at localhost:36067 2023/06/21 10:14:09 checking machine... 2023/06/21 10:14:09 checking revisions... [ 33.793690] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:14:09 testing simple program... [ 33.843645] cgroup: Unknown subsys name 'net' [ 33.893872] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:14:08 Registers: info registers vcpu 0 RAX=ffffed1001b5c603 RBX=ffffed1001b5c604 RCX=ffffffff81830707 RDX=ffffed1001b5c604 RSI=0000000000000004 RDI=ffff88800dae3018 RBP=ffffed1001b5c603 RSP=ffff8880145df868 R8 =0000000000000000 R9 =ffffed1001b5c603 R10=ffff88800dae301b R11=00000000000b6a61 R12=0000000000000408 R13=ffffffff87b6a200 R14=ffff88800ed7fe80 R15=ffff88800dae3018 RIP=ffffffff8180f186 RFL=00000082 [--S----] 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 00007f073b41e700 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=00007f8214286618 CR3=000000001683c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732038303a3431 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343337 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=1ffff110019f458f RBX=ffff88800cfa2c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cfa2c78 RBP=ffff888018253000 RSP=ffff88806cf09da8 R8 =0000000000000001 R9 =ffffed100d9e13a9 R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888018251000 R14=ffffffff811f7e84 R15=ffff88800ed7fe80 RIP=ffffffff818464e2 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 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=00007f09e247fc50 CR3=000000000f6f4000 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=ffb1f9e128484589dd4d2f3761a30a13 XMM02=2c67c8bc2e329bc3000000000011a110 XMM03=fb795ef6d65770560000000000121a90 XMM04=2751e8d486135f7900000000000ae988 XMM05=dfcdbad4f1609c3700000000001318e8 XMM06=99754504ecf61bcf0000000000130750 XMM07=e042d86d42eb936e0000000000121d10 XMM08=4af150a68e1cd8a7000000000011a170 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000