syzkaller login: [ 57.356099] BUG: Bad rss-counter state mm:000000009592fa6d type:MM_FILEPAGES val:33 [ 57.357505] BUG: Bad rss-counter state mm:000000009592fa6d type:MM_ANONPAGES val:22 [ 57.510733] ================================================================== [ 57.511715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.512711] Read of size 8 at addr ffff88800e970058 by task sshd/219 [ 57.513657] [ 57.513993] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.515039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.516239] Call Trace: [ 57.516619] [ 57.516975] dump_stack_lvl+0x91/0xf0 [ 57.517556] print_report+0xcc/0x620 [ 57.518144] ? __virt_addr_valid+0x102/0x340 [ 57.518794] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.519584] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.520250] kasan_report+0xbe/0xf0 [ 57.520734] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.521375] vma_interval_tree_remove+0xc75/0xec0 [ 57.522000] vma_prepare+0xc54/0x11a0 [ 57.522479] __split_vma+0x5af/0x950 [ 57.522977] ? __pfx___split_vma+0x10/0x10 [ 57.523526] ? find_held_lock+0x2c/0x110 [ 57.524066] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.524634] ? lock_is_held_type+0x9f/0x120 [ 57.525189] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.525801] ? mtree_range_walk+0x632/0x900 [ 57.526368] ? mas_walk+0x5c7/0x7c0 [ 57.526844] do_vmi_munmap+0x1f1/0x2b0 [ 57.527352] mmap_region+0x1f9/0x2660 [ 57.527847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.528375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.529104] ? __pfx_lock_acquire+0x10/0x10 [ 57.529632] ? __pfx_mmap_region+0x10/0x10 [ 57.530182] ? security_mmap_addr+0x7d/0xa0 [ 57.530714] ? get_unmapped_area+0x1f5/0x3f0 [ 57.531298] do_mmap+0x854/0xf00 [ 57.531759] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.532271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.532837] ksys_mmap_pgoff+0x3af/0x500 [ 57.533359] do_syscall_64+0x3f/0x90 [ 57.533836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.534491] RIP: 0033:0x7f4260a73d82 [ 57.534964] 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 [ 57.537120] RSP: 002b:00007ffd3dbd5448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.538049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4260a73d82 [ 57.538900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f425fead000 [ 57.539776] RBP: 00007f425fead000 R08: 0000000000000009 R09: 0000000000001000 [ 57.540622] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f576caec0 [ 57.541478] R13: 00007ffd3dbd5460 R14: 00007ffd3dbd5490 R15: 00007ffd3dbd57f0 [ 57.542344] [ 57.542633] [ 57.542848] Allocated by task 212: [ 57.543285] kasan_save_stack+0x22/0x50 [ 57.543813] kasan_set_track+0x25/0x30 [ 57.544318] __kasan_slab_alloc+0x59/0x70 [ 57.544840] kmem_cache_alloc+0x16b/0x370 [ 57.545360] vm_area_dup+0x20/0x160 [ 57.545810] __split_vma+0x170/0x950 [ 57.546283] split_vma+0xc6/0x110 [ 57.546724] mprotect_fixup+0x8d2/0xb30 [ 57.547241] do_mprotect_pkey+0x87e/0xd40 [ 57.547771] __x64_sys_mprotect+0x78/0xc0 [ 57.548318] do_syscall_64+0x3f/0x90 [ 57.548791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.549441] [ 57.549658] Freed by task 212: [ 57.550065] kasan_save_stack+0x22/0x50 [ 57.550574] kasan_set_track+0x25/0x30 [ 57.551082] kasan_save_free_info+0x2b/0x50 [ 57.551630] __kasan_slab_free+0x10a/0x190 [ 57.552176] kmem_cache_free+0x10d/0x4d0 [ 57.552688] rcu_core+0x8c8/0x2860 [ 57.553144] __do_softirq+0x1b7/0x7d4 [ 57.553617] [ 57.553833] Last potentially related work creation: [ 57.554433] kasan_save_stack+0x22/0x50 [ 57.554958] __kasan_record_aux_stack+0x8e/0xa0 [ 57.555713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.556373] remove_vma+0x139/0x170 [ 57.556830] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.557408] do_vmi_munmap+0x1f1/0x2b0 [ 57.557894] __vm_munmap+0x138/0x3a0 [ 57.558368] __x64_sys_munmap+0x59/0x80 [ 57.558870] do_syscall_64+0x3f/0x90 [ 57.559363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.560037] [ 57.560251] The buggy address belongs to the object at ffff88800e970000 [ 57.560251] which belongs to the cache vm_area_struct of size 168 [ 57.561722] The buggy address is located 88 bytes inside of [ 57.561722] freed 168-byte region [ffff88800e970000, ffff88800e9700a8) [ 57.563170] [ 57.563388] The buggy address belongs to the physical page: [ 57.564086] page:000000002375e41e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe970 [ 57.565180] memcg:ffff88800d4f4c01 [ 57.565605] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.566279] page_type: 0xffffffff() [ 57.566731] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.567676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4f4c01 [ 57.568605] page dumped because: kasan: bad access detected [ 57.569274] [ 57.569489] Memory state around the buggy address: [ 57.570092] ffff88800e96ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 57.570970] ffff88800e96ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 57.571833] >ffff88800e970000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.572693] ^ [ 57.573429] ffff88800e970080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 57.574302] ffff88800e970100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.575158] ================================================================== [ 57.576115] Disabling lock debugging due to kernel taint [ 59.586169] BUG: Bad rss-counter state mm:00000000d7caf7b1 type:MM_FILEPAGES val:33 [ 59.587167] BUG: Bad rss-counter state mm:00000000d7caf7b1 type:MM_ANONPAGES val:22 [ 60.092012] BUG: Bad rss-counter state mm:00000000a4a3aa78 type:MM_FILEPAGES val:33 [ 60.093173] BUG: Bad rss-counter state mm:00000000a4a3aa78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63115' (ECDSA) to the list of known hosts. 2023/06/19 16:23:47 fuzzer started 2023/06/19 16:23:47 dialing manager at localhost:44161 2023/06/19 16:23:47 checking machine... 2023/06/19 16:23:47 checking revisions... [ 60.866388] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:23:47 testing simple program... [ 60.917048] cgroup: Unknown subsys name 'net' [ 60.971187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:23:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fed35eef650 CR3=000000000fa40000 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=2036343a33323a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a33323a3631203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f595bb62a70 CR3=0000000013a5a000 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=ac0019518f0b518e264136a282e1302f XMM02=000000000011e480eff9b2d0a8fce9cb XMM03=000000000011e5502c67c8bc2e329bc3 XMM04=e5c7d40ad67075f200000000000ae988 XMM05=dfcdbad4f1609c370000000000133ff0 XMM06=af4c676f27579eb000000000001331c8 XMM07=e042d86d42eb936e00000000001249f0 XMM08=cd2d3c6193098e04000000000011e550 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000