syzkaller login: [ 121.086396] BUG: Bad rss-counter state mm:00000000446e767a type:MM_FILEPAGES val:33 [ 121.087388] BUG: Bad rss-counter state mm:00000000446e767a type:MM_ANONPAGES val:22 [ 121.245904] ================================================================== [ 121.247036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 121.248188] Read of size 8 at addr ffff888015e29058 by task sshd/229 [ 121.249275] [ 121.249513] CPU: 1 PID: 229 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 121.250530] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 121.251496] Call Trace: [ 121.251812] [ 121.252098] dump_stack_lvl+0x91/0xf0 [ 121.252603] print_report+0xcc/0x620 [ 121.253088] ? __virt_addr_valid+0x102/0x340 [ 121.253637] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.254255] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.254900] kasan_report+0xbe/0xf0 [ 121.255381] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.256037] vma_interval_tree_remove+0xc75/0xec0 [ 121.256656] vma_prepare+0xc54/0x11a0 [ 121.257132] __split_vma+0x5af/0x950 [ 121.257599] ? __pfx___split_vma+0x10/0x10 [ 121.258121] ? find_held_lock+0x2c/0x110 [ 121.258638] do_vmi_align_munmap+0x2ba/0x11f0 [ 121.259194] ? lock_is_held_type+0x9f/0x120 [ 121.259729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 121.260334] ? mtree_range_walk+0x632/0x900 [ 121.260894] ? mas_walk+0x5c7/0x7c0 [ 121.261363] do_vmi_munmap+0x1f1/0x2b0 [ 121.261857] mmap_region+0x1f9/0x2660 [ 121.262338] ? vm_mmap_pgoff+0x15c/0x3a0 [ 121.262883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 121.263608] ? __pfx_lock_acquire+0x10/0x10 [ 121.264141] ? __pfx_mmap_region+0x10/0x10 [ 121.264677] ? security_mmap_addr+0x7d/0xa0 [ 121.265205] ? get_unmapped_area+0x1f5/0x3f0 [ 121.265751] do_mmap+0x854/0xf00 [ 121.266190] vm_mmap_pgoff+0x1a6/0x3a0 [ 121.266729] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 121.267288] ksys_mmap_pgoff+0x3af/0x500 [ 121.267829] do_syscall_64+0x3f/0x90 [ 121.268305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.268973] RIP: 0033:0x7f18d55a4d82 [ 121.269429] 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 [ 121.271605] RSP: 002b:00007fff19854f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 121.272543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18d55a4d82 [ 121.273407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18d49de000 [ 121.274283] RBP: 00007f18d49de000 R08: 0000000000000009 R09: 0000000000001000 [ 121.275130] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbacc0bec0 [ 121.275967] R13: 00007fff19854f30 R14: 00007fff19854f60 R15: 00007fff198552c0 [ 121.276831] [ 121.277126] [ 121.277339] Allocated by task 222: [ 121.277774] kasan_save_stack+0x22/0x50 [ 121.278275] kasan_set_track+0x25/0x30 [ 121.278799] __kasan_slab_alloc+0x59/0x70 [ 121.279320] kmem_cache_alloc+0x16b/0x370 [ 121.279867] vm_area_dup+0x20/0x160 [ 121.280318] __split_vma+0x170/0x950 [ 121.280791] split_vma+0xc6/0x110 [ 121.281226] mprotect_fixup+0x8d2/0xb30 [ 121.281725] do_mprotect_pkey+0x87e/0xd40 [ 121.282240] __x64_sys_mprotect+0x78/0xc0 [ 121.282789] do_syscall_64+0x3f/0x90 [ 121.283257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.283924] [ 121.284137] Freed by task 203: [ 121.284546] kasan_save_stack+0x22/0x50 [ 121.285049] kasan_set_track+0x25/0x30 [ 121.285545] kasan_save_free_info+0x2b/0x50 [ 121.286105] __kasan_slab_free+0x10a/0x190 [ 121.286646] kmem_cache_free+0x10d/0x4d0 [ 121.287150] rcu_core+0x8c8/0x2860 [ 121.287600] __do_softirq+0x1b7/0x7d4 [ 121.288074] [ 121.288291] Last potentially related work creation: [ 121.288907] kasan_save_stack+0x22/0x50 [ 121.289412] __kasan_record_aux_stack+0x8e/0xa0 [ 121.290113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 121.290771] remove_vma+0x139/0x170 [ 121.291218] do_vmi_align_munmap+0xd4a/0x11f0 [ 121.291776] do_vmi_munmap+0x1f1/0x2b0 [ 121.292261] __vm_munmap+0x138/0x3a0 [ 121.292788] __x64_sys_munmap+0x59/0x80 [ 121.293294] do_syscall_64+0x3f/0x90 [ 121.293773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.294441] [ 121.294697] The buggy address belongs to the object at ffff888015e29000 [ 121.294697] which belongs to the cache vm_area_struct of size 168 [ 121.296224] The buggy address is located 88 bytes inside of [ 121.296224] freed 168-byte region [ffff888015e29000, ffff888015e290a8) [ 121.297644] [ 121.297860] The buggy address belongs to the physical page: [ 121.298529] page:0000000018cdb4b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e29 [ 121.299626] memcg:ffff88800eba7401 [ 121.300057] flags: 0x100000000000200(slab|node=0|zone=1) [ 121.300749] page_type: 0xffffffff() [ 121.301205] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 121.302120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eba7401 [ 121.303054] page dumped because: kasan: bad access detected [ 121.303766] [ 121.303982] Memory state around the buggy address: [ 121.304593] ffff888015e28f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 121.305445] ffff888015e28f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 121.306307] >ffff888015e29000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 121.307238] ^ [ 121.308025] ffff888015e29080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 121.308898] ffff888015e29100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 121.309786] ================================================================== [ 121.310736] Disabling lock debugging due to kernel taint [ 123.331413] BUG: Bad rss-counter state mm:000000007ade2c26 type:MM_FILEPAGES val:33 [ 123.332753] BUG: Bad rss-counter state mm:000000007ade2c26 type:MM_ANONPAGES val:22 [ 123.914209] BUG: Bad rss-counter state mm:0000000031356048 type:MM_FILEPAGES val:33 [ 123.915387] BUG: Bad rss-counter state mm:0000000031356048 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50226' (ECDSA) to the list of known hosts. 2023/06/20 01:36:35 fuzzer started 2023/06/20 01:36:35 dialing manager at localhost:44161 2023/06/20 01:36:35 checking machine... 2023/06/20 01:36:35 checking revisions... [ 124.571829] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:36:35 testing simple program... [ 124.617620] cgroup: Unknown subsys name 'net' [ 124.669641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:35:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86055e7c RCX=ffffffff8661f0c7 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86055e7c RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86055e7c R13=ffffffff85d793d4 R14=ffffffff86055e78 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 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=00007ffe5d253ff8 CR3=0000000005482000 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=00007ff871ee9510000055914876c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880147d7e20 RCX=ffffffff8449f8fb RDX=ffff888016df0000 RSI=0000000000000000 RDI=0000000000000007 RBP=dffffc0000000000 RSP=ffff8880147d7d88 R8 =0000000000000007 R9 =0000000000001000 R10=ffff888016845c1e R11=0000000000000000 R12=ffff888016845c1e R13=ffffed10028fafcb R14=0000000000000002 R15=ffff8880147d7e59 RIP=ffffffff814c07e4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa94fd92900 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=00007fa950349618 CR3=0000000015c30000 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=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