syzkaller login: [ 31.455540] BUG: Bad rss-counter state mm:000000004ff4a2b5 type:MM_FILEPAGES val:33 [ 31.456892] BUG: Bad rss-counter state mm:000000004ff4a2b5 type:MM_ANONPAGES val:22 [ 31.638799] ================================================================== [ 31.639717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.640656] Read of size 8 at addr ffff888016b9c880 by task sshd/220 [ 31.641423] [ 31.641647] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.642626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.643610] Call Trace: [ 31.643924] [ 31.644250] dump_stack_lvl+0x91/0xf0 [ 31.644752] print_report+0xcc/0x620 [ 31.645234] ? __virt_addr_valid+0x102/0x340 [ 31.645776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.646403] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.647022] kasan_report+0xbe/0xf0 [ 31.647502] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.648142] vma_interval_tree_remove+0xc75/0xec0 [ 31.648756] vma_prepare+0xc54/0x11a0 [ 31.649236] __split_vma+0x5af/0x950 [ 31.649724] ? __pfx___split_vma+0x10/0x10 [ 31.650251] ? find_held_lock+0x2c/0x110 [ 31.650787] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.651346] ? lock_is_held_type+0x9f/0x120 [ 31.651885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.652493] ? mtree_range_walk+0x632/0x900 [ 31.653039] ? mas_walk+0x5c7/0x7c0 [ 31.653512] do_vmi_munmap+0x1f1/0x2b0 [ 31.654002] mmap_region+0x1f9/0x2660 [ 31.654491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.654997] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.655711] ? __pfx_lock_acquire+0x10/0x10 [ 31.656261] ? __pfx_mmap_region+0x10/0x10 [ 31.656785] ? security_mmap_addr+0x7d/0xa0 [ 31.657325] ? get_unmapped_area+0x1f5/0x3f0 [ 31.657867] do_mmap+0x854/0xf00 [ 31.658304] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.658794] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.659352] ksys_mmap_pgoff+0x3af/0x500 [ 31.659855] do_syscall_64+0x3f/0x90 [ 31.660344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.660996] RIP: 0033:0x7facb10d7d82 [ 31.661456] 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 [ 31.663564] RSP: 002b:00007ffe5bb92618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.664486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facb10d7d82 [ 31.665334] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facb0511000 [ 31.666213] RBP: 00007facb0511000 R08: 0000000000000009 R09: 0000000000001000 [ 31.667088] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624c90b9f60 [ 31.667929] R13: 00007ffe5bb92630 R14: 00007ffe5bb92660 R15: 00007ffe5bb929c0 [ 31.668798] [ 31.669089] [ 31.669299] Allocated by task 213: [ 31.669733] kasan_save_stack+0x22/0x50 [ 31.670239] kasan_set_track+0x25/0x30 [ 31.670736] __kasan_slab_alloc+0x59/0x70 [ 31.671255] kmem_cache_alloc+0x16b/0x370 [ 31.671767] vm_area_dup+0x20/0x160 [ 31.672223] __split_vma+0x170/0x950 [ 31.672706] split_vma+0xc6/0x110 [ 31.673144] mprotect_fixup+0x8d2/0xb30 [ 31.673638] do_mprotect_pkey+0x87e/0xd40 [ 31.674153] __x64_sys_mprotect+0x78/0xc0 [ 31.674670] do_syscall_64+0x3f/0x90 [ 31.675143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.675783] [ 31.675995] Freed by task 13: [ 31.676394] kasan_save_stack+0x22/0x50 [ 31.676904] kasan_set_track+0x25/0x30 [ 31.677395] kasan_save_free_info+0x2b/0x50 [ 31.677926] __kasan_slab_free+0x10a/0x190 [ 31.678458] kmem_cache_free+0x10d/0x4d0 [ 31.678961] rcu_core+0x8c8/0x2860 [ 31.679399] __do_softirq+0x1b7/0x7d4 [ 31.679885] [ 31.680124] Last potentially related work creation: [ 31.680726] kasan_save_stack+0x22/0x50 [ 31.681233] __kasan_record_aux_stack+0x8e/0xa0 [ 31.681805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.682458] remove_vma+0x139/0x170 [ 31.682904] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.683462] do_vmi_munmap+0x1f1/0x2b0 [ 31.683948] __vm_munmap+0x138/0x3a0 [ 31.684421] __x64_sys_munmap+0x59/0x80 [ 31.684908] do_syscall_64+0x3f/0x90 [ 31.685379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.686023] [ 31.686235] The buggy address belongs to the object at ffff888016b9c828 [ 31.686235] which belongs to the cache vm_area_struct of size 168 [ 31.687693] The buggy address is located 88 bytes inside of [ 31.687693] freed 168-byte region [ffff888016b9c828, ffff888016b9c8d0) [ 31.689103] [ 31.689316] The buggy address belongs to the physical page: [ 31.689966] page:00000000888b73d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b9c [ 31.691046] memcg:ffff88800c529301 [ 31.691464] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.692168] page_type: 0xffffffff() [ 31.692619] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.693522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c529301 [ 31.694413] page dumped because: kasan: bad access detected [ 31.695064] [ 31.695278] Memory state around the buggy address: [ 31.695861] ffff888016b9c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.696717] ffff888016b9c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.697567] >ffff888016b9c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.698410] ^ [ 31.698825] ffff888016b9c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.699680] ffff888016b9c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.700546] ================================================================== [ 31.701517] Disabling lock debugging due to kernel taint [ 33.581020] BUG: Bad rss-counter state mm:00000000a48de493 type:MM_FILEPAGES val:33 [ 33.582468] BUG: Bad rss-counter state mm:00000000a48de493 type:MM_ANONPAGES val:22 [ 34.081542] BUG: Bad rss-counter state mm:00000000372d2a14 type:MM_FILEPAGES val:33 [ 34.083297] BUG: Bad rss-counter state mm:00000000372d2a14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2506' (ECDSA) to the list of known hosts. 2023/06/21 06:33:21 fuzzer started 2023/06/21 06:33:21 dialing manager at localhost:36067 2023/06/21 06:33:21 checking machine... 2023/06/21 06:33:21 checking revisions... [ 34.790532] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:33:21 testing simple program... [ 34.828507] cgroup: Unknown subsys name 'net' [ 34.864309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88809a035670 RCX=ffffffff8114313a RDX=ffff8880147b1b40 RSI=0000000000000100 RDI=0000000000000006 RBP=000000001a035670 RSP=ffff88806ce09d78 R8 =0000000000000006 R9 =ffff88809a035670 R10=000000001a035670 R11=00000000000b6a61 R12=0000000000000000 R13=ffffea00003bd600 R14=ffffffff813782f8 R15=ffff88800ef58730 RIP=ffffffff814c0860 RFL=00000286 [--S--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 00007f2a5d752900 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=00007f2a5dd09618 CR3=000000000e8d8000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f108a9df5f8 CR3=0000000013a74000 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=d16fe61eb5dc26946a41fc635bc76245 XMM02=000000000011b0d8ec2efd57dc4c00df XMM03=0000000000121e8033f57eb3ca83fcce XMM04=77ad7bcf1dca766700000000000ae988 XMM05=902f9bc7c432ab630000000000132280 XMM06=4fda316b135da52b0000000000131908 XMM07=e042d86d42eb936e0000000000122158 XMM08=33f57eb3ca83fcce000000000011b138 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000