syzkaller login: [ 38.322329] BUG: Bad rss-counter state mm:0000000097df6025 type:MM_FILEPAGES val:33 [ 38.324115] BUG: Bad rss-counter state mm:0000000097df6025 type:MM_ANONPAGES val:22 [ 38.503626] ================================================================== [ 38.504635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.505736] Read of size 8 at addr ffff88800e95a5c8 by task sshd/220 [ 38.506578] [ 38.506816] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.507779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.508846] Call Trace: [ 38.509197] [ 38.509514] dump_stack_lvl+0x91/0xf0 [ 38.510053] print_report+0xcc/0x620 [ 38.510586] ? __virt_addr_valid+0x102/0x340 [ 38.511204] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.511882] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.512564] kasan_report+0xbe/0xf0 [ 38.513084] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.513762] vma_interval_tree_remove+0xc75/0xec0 [ 38.514421] vma_prepare+0xc54/0x11a0 [ 38.514951] __split_vma+0x5af/0x950 [ 38.515494] ? __pfx___split_vma+0x10/0x10 [ 38.516076] ? find_held_lock+0x2c/0x110 [ 38.516649] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.517269] ? lock_is_held_type+0x9f/0x120 [ 38.517859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.518529] ? mtree_range_walk+0x632/0x900 [ 38.519148] ? mas_walk+0x5c7/0x7c0 [ 38.519668] do_vmi_munmap+0x1f1/0x2b0 [ 38.520208] mmap_region+0x1f9/0x2660 [ 38.520737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.521305] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.522095] ? __pfx_lock_acquire+0x10/0x10 [ 38.522688] ? __pfx_mmap_region+0x10/0x10 [ 38.523277] ? security_mmap_addr+0x7d/0xa0 [ 38.523864] ? get_unmapped_area+0x1f5/0x3f0 [ 38.524464] do_mmap+0x854/0xf00 [ 38.524948] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.525491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.526108] ksys_mmap_pgoff+0x3af/0x500 [ 38.526672] do_syscall_64+0x3f/0x90 [ 38.527218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.527924] RIP: 0033:0x7f3945510d82 [ 38.528429] 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 [ 38.530761] RSP: 002b:00007ffd67e7c2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.531766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3945510d82 [ 38.532695] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f394494a000 [ 38.533628] RBP: 00007f394494a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.534564] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fba1156980 [ 38.535651] R13: 00007ffd67e7c2f0 R14: 00007ffd67e7c320 R15: 00007ffd67e7c680 [ 38.536881] [ 38.537304] [ 38.537554] Allocated by task 213: [ 38.538026] kasan_save_stack+0x22/0x50 [ 38.538578] kasan_set_track+0x25/0x30 [ 38.539133] __kasan_slab_alloc+0x59/0x70 [ 38.539705] kmem_cache_alloc+0x16b/0x370 [ 38.540275] vm_area_dup+0x20/0x160 [ 38.540780] __split_vma+0x170/0x950 [ 38.541293] split_vma+0xc6/0x110 [ 38.541774] mprotect_fixup+0x8d2/0xb30 [ 38.542327] do_mprotect_pkey+0x87e/0xd40 [ 38.542899] __x64_sys_mprotect+0x78/0xc0 [ 38.543500] do_syscall_64+0x3f/0x90 [ 38.544021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.544728] [ 38.544963] Freed by task 213: [ 38.545392] kasan_save_stack+0x22/0x50 [ 38.545952] kasan_set_track+0x25/0x30 [ 38.546500] kasan_save_free_info+0x2b/0x50 [ 38.547094] __kasan_slab_free+0x10a/0x190 [ 38.547687] kmem_cache_free+0x10d/0x4d0 [ 38.548251] rcu_core+0x8c8/0x2860 [ 38.548735] __do_softirq+0x1b7/0x7d4 [ 38.549258] [ 38.549493] Last potentially related work creation: [ 38.550132] kasan_save_stack+0x22/0x50 [ 38.550684] __kasan_record_aux_stack+0x8e/0xa0 [ 38.551320] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.552021] remove_vma+0x139/0x170 [ 38.552517] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.553129] do_vmi_munmap+0x1f1/0x2b0 [ 38.553663] __vm_munmap+0x138/0x3a0 [ 38.554175] __x64_sys_munmap+0x59/0x80 [ 38.554717] do_syscall_64+0x3f/0x90 [ 38.555277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.555984] [ 38.556219] The buggy address belongs to the object at ffff88800e95a570 [ 38.556219] which belongs to the cache vm_area_struct of size 168 [ 38.557831] The buggy address is located 88 bytes inside of [ 38.557831] freed 168-byte region [ffff88800e95a570, ffff88800e95a618) [ 38.559383] [ 38.559617] The buggy address belongs to the physical page: [ 38.560338] page:00000000342ee401 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe95a [ 38.561526] memcg:ffff88800e7e0201 [ 38.561994] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.562760] page_type: 0xffffffff() [ 38.563279] raw: 0100000000000200 ffff88800879fc80 ffffea000037b400 dead000000000003 [ 38.564302] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7e0201 [ 38.565308] page dumped because: kasan: bad access detected [ 38.566032] [ 38.566267] Memory state around the buggy address: [ 38.566906] ffff88800e95a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.567859] ffff88800e95a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.568797] >ffff88800e95a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.569737] ^ [ 38.570468] ffff88800e95a600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.571414] ffff88800e95a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.572346] ================================================================== [ 38.573530] Disabling lock debugging due to kernel taint [ 40.543797] BUG: Bad rss-counter state mm:000000002c7596ef type:MM_FILEPAGES val:33 [ 40.545053] BUG: Bad rss-counter state mm:000000002c7596ef type:MM_ANONPAGES val:22 [ 41.050488] BUG: Bad rss-counter state mm:0000000062961084 type:MM_FILEPAGES val:33 [ 41.051785] BUG: Bad rss-counter state mm:0000000062961084 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38008' (ECDSA) to the list of known hosts. 2023/06/20 00:15:35 fuzzer started 2023/06/20 00:15:35 dialing manager at localhost:44161 2023/06/20 00:15:35 checking machine... 2023/06/20 00:15:35 checking revisions... [ 41.901738] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:15:35 testing simple program... [ 41.957712] cgroup: Unknown subsys name 'net' [ 42.019725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:15:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180cd09 RCX=ffffffff86137501 RDX=1ffff110028c8f24 RSI=0000000000000000 RDI=ffffffff8180cd09 RBP=ffffffff8180cd09 RSP=ffff888014647878 R8 =ffffffff86137542 R9 =ffff888014647908 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000001 R13=0000000000000000 R14=ffff88800fdf0000 R15=0000000000092c40 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f6890fb5900 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=00007f689156c618 CR3=000000000c4b0000 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=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=00007fe3a26b4950 CR3=000000000c9fa000 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=0c2e9ea511d9559cd041a3a170c689c0 XMM02=000000000011cd80ec2efd57dc4c00df XMM03=00000000001245f012d6b4c40ec7e817 XMM04=5f3874b2348088ac00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134190 XMM06=222a1175db987c940000000000132ff8 XMM07=e042d86d42eb936e0000000000124870 XMM08=12d6b4c40ec7e817000000000011cde0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000