syzkaller login: [ 38.785925] BUG: Bad rss-counter state mm:000000001a153046 type:MM_FILEPAGES val:33 [ 38.787337] BUG: Bad rss-counter state mm:000000001a153046 type:MM_ANONPAGES val:22 [ 38.934418] ================================================================== [ 38.935551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.936709] Read of size 8 at addr ffff888016fc6968 by task sshd/220 [ 38.937765] [ 38.937990] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.938895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.939928] Call Trace: [ 38.940267] [ 38.940562] dump_stack_lvl+0x91/0xf0 [ 38.941124] print_report+0xcc/0x620 [ 38.941657] ? __virt_addr_valid+0x102/0x340 [ 38.942231] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.942947] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.943607] kasan_report+0xbe/0xf0 [ 38.944119] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.944763] vma_interval_tree_remove+0xc75/0xec0 [ 38.945433] vma_prepare+0xc54/0x11a0 [ 38.945950] __split_vma+0x5af/0x950 [ 38.946443] ? __pfx___split_vma+0x10/0x10 [ 38.947003] ? find_held_lock+0x2c/0x110 [ 38.947586] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.948187] ? lock_is_held_type+0x9f/0x120 [ 38.948762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.949480] ? mtree_range_walk+0x632/0x900 [ 38.950063] ? mas_walk+0x5c7/0x7c0 [ 38.950562] do_vmi_munmap+0x1f1/0x2b0 [ 38.951090] mmap_region+0x1f9/0x2660 [ 38.951671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.952211] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.952963] ? __pfx_lock_acquire+0x10/0x10 [ 38.953537] ? __pfx_mmap_region+0x10/0x10 [ 38.954143] ? security_mmap_addr+0x7d/0xa0 [ 38.954718] ? get_unmapped_area+0x1f5/0x3f0 [ 38.955305] do_mmap+0x854/0xf00 [ 38.955758] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.956327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.956924] ksys_mmap_pgoff+0x3af/0x500 [ 38.957487] do_syscall_64+0x3f/0x90 [ 38.958048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958734] RIP: 0033:0x7f4b15574d82 [ 38.959226] 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 [ 38.961515] RSP: 002b:00007ffd3b2eb9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.962494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b15574d82 [ 38.963351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b149ae000 [ 38.964188] RBP: 00007f4b149ae000 R08: 0000000000000009 R09: 0000000000001000 [ 38.965082] R10: 0000000000000812 R11: 0000000000000206 R12: 000055713eea3f70 [ 38.965944] R13: 00007ffd3b2eb9f0 R14: 00007ffd3b2eba20 R15: 00007ffd3b2ebd80 [ 38.966855] [ 38.967148] [ 38.967361] Allocated by task 213: [ 38.967787] kasan_save_stack+0x22/0x50 [ 38.968288] kasan_set_track+0x25/0x30 [ 38.968830] __kasan_slab_alloc+0x59/0x70 [ 38.969377] kmem_cache_alloc+0x16b/0x370 [ 38.969896] vm_area_dup+0x20/0x160 [ 38.970354] __split_vma+0x170/0x950 [ 38.970863] split_vma+0xc6/0x110 [ 38.971298] mprotect_fixup+0x8d2/0xb30 [ 38.971800] do_mprotect_pkey+0x87e/0xd40 [ 38.972320] __x64_sys_mprotect+0x78/0xc0 [ 38.972884] do_syscall_64+0x3f/0x90 [ 38.973375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.974012] [ 38.974225] Freed by task 213: [ 38.974615] kasan_save_stack+0x22/0x50 [ 38.975161] kasan_set_track+0x25/0x30 [ 38.975665] kasan_save_free_info+0x2b/0x50 [ 38.976193] __kasan_slab_free+0x10a/0x190 [ 38.976731] kmem_cache_free+0x10d/0x4d0 [ 38.977303] rcu_core+0x8c8/0x2860 [ 38.977749] __do_softirq+0x1b7/0x7d4 [ 38.978290] [ 38.978509] Last potentially related work creation: [ 38.979092] kasan_save_stack+0x22/0x50 [ 38.979623] __kasan_record_aux_stack+0x8e/0xa0 [ 38.980197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.980830] remove_vma+0x139/0x170 [ 38.981296] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.981899] do_vmi_munmap+0x1f1/0x2b0 [ 38.982385] __vm_munmap+0x138/0x3a0 [ 38.982844] __x64_sys_munmap+0x59/0x80 [ 38.983336] do_syscall_64+0x3f/0x90 [ 38.983863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.984504] [ 38.984721] The buggy address belongs to the object at ffff888016fc6910 [ 38.984721] which belongs to the cache vm_area_struct of size 168 [ 38.986205] The buggy address is located 88 bytes inside of [ 38.986205] freed 168-byte region [ffff888016fc6910, ffff888016fc69b8) [ 38.987604] [ 38.987861] The buggy address belongs to the physical page: [ 38.988517] page:0000000013430dc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fc6 [ 38.989662] memcg:ffff88801470fc01 [ 38.990143] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.990814] page_type: 0xffffffff() [ 38.991271] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.992253] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801470fc01 [ 38.993186] page dumped because: kasan: bad access detected [ 38.993854] [ 38.994072] Memory state around the buggy address: [ 38.994711] ffff888016fc6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.995588] ffff888016fc6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.996505] >ffff888016fc6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.997409] ^ [ 38.998199] ffff888016fc6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.999055] ffff888016fc6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.999909] ================================================================== [ 39.000840] Disabling lock debugging due to kernel taint [ 40.335914] BUG: Bad rss-counter state mm:0000000054e8eecc type:MM_FILEPAGES val:33 [ 40.336657] BUG: Bad rss-counter state mm:0000000054e8eecc type:MM_ANONPAGES val:22 [ 40.677036] BUG: Bad rss-counter state mm:000000008973b09c type:MM_FILEPAGES val:33 [ 40.677578] BUG: Bad rss-counter state mm:000000008973b09c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43821' (ECDSA) to the list of known hosts. 2023/06/21 03:16:40 fuzzer started 2023/06/21 03:16:40 dialing manager at localhost:36067 2023/06/21 03:16:40 checking machine... 2023/06/21 03:16:40 checking revisions... [ 41.303887] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:16:40 testing simple program... [ 41.357548] cgroup: Unknown subsys name 'net' [ 41.396359] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:16:40 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015cbfb40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888015cbfe70 RDI=ffffffff84e3a420 RBP=ffffffff84e3a420 RSP=ffff888015cbf7e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888015cbfe70 R13=0000000000000000 R14=0000000000000000 R15=ffff888015cbfb80 RIP=ffffffff814c086b RFL=00000246 [---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 00007f906decf900 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=00007f906de9e008 CR3=000000000cb40000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffea0000637934 RCX=ffffffff8170f38f RDX=0000000000000000 RSI=0000000000000082 RDI=000000000000007f RBP=ffff8880146b7d90 RSP=ffff8880146b7bf8 R8 =0000000000000000 R9 =fffff940000c6f26 R10=ffffea0000637937 R11=0000000000000000 R12=ffffea0000637900 R13=ffff88800d8e30e8 R14=ffff8880146b7db8 R15=0000000000000082 RIP=ffffffff814c0404 RFL=00000216 [----AP-] 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 00007f97d4cff900 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=00007f97d4103900 CR3=000000000d88e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8d7253f3c771a0e000000000000ae988 XMM05=e315bd6b5a7dac720000000000132758 XMM06=e1ced201e8a6300f0000000000131188 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000