syzkaller login: [ 30.289787] BUG: Bad rss-counter state mm:000000004755efdf type:MM_FILEPAGES val:33 [ 30.290972] BUG: Bad rss-counter state mm:000000004755efdf type:MM_ANONPAGES val:22 [ 30.330158] ================================================================== [ 30.331125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.332093] Read of size 8 at addr ffff88800dea9c20 by task sshd/220 [ 30.332920] [ 30.333187] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.334121] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.335147] Call Trace: [ 30.335505] [ 30.335790] dump_stack_lvl+0x91/0xf0 [ 30.336320] print_report+0xcc/0x620 [ 30.336896] ? __virt_addr_valid+0x102/0x340 [ 30.337416] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.338017] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.338679] kasan_report+0xbe/0xf0 [ 30.339131] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.339720] vma_interval_tree_remove+0xc75/0xec0 [ 30.340286] vma_prepare+0xc54/0x11a0 [ 30.340742] __split_vma+0x5af/0x950 [ 30.341207] ? __pfx___split_vma+0x10/0x10 [ 30.341707] ? find_held_lock+0x2c/0x110 [ 30.342218] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.342793] ? lock_is_held_type+0x9f/0x120 [ 30.343318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.343937] ? mtree_range_walk+0x632/0x900 [ 30.344483] ? mas_walk+0x5c7/0x7c0 [ 30.344958] do_vmi_munmap+0x1f1/0x2b0 [ 30.345450] mmap_region+0x1f9/0x2660 [ 30.345922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.346423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.347144] ? __pfx_lock_acquire+0x10/0x10 [ 30.347676] ? __pfx_mmap_region+0x10/0x10 [ 30.348207] ? security_mmap_addr+0x7d/0xa0 [ 30.348733] ? get_unmapped_area+0x1f5/0x3f0 [ 30.349299] do_mmap+0x854/0xf00 [ 30.349738] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.350232] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.350792] ksys_mmap_pgoff+0x3af/0x500 [ 30.351304] do_syscall_64+0x3f/0x90 [ 30.351771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352409] RIP: 0033:0x7efd36082d82 [ 30.352878] 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 [ 30.355022] RSP: 002b:00007ffd3628ecd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.355941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd36082d82 [ 30.356800] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd354bc000 [ 30.357656] RBP: 00007efd354bc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.358504] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653a4512d90 [ 30.359348] R13: 00007ffd3628ecf0 R14: 00007ffd3628ed20 R15: 00007ffd3628f080 [ 30.360204] [ 30.360488] [ 30.360706] Allocated by task 213: [ 30.361143] kasan_save_stack+0x22/0x50 [ 30.361651] kasan_set_track+0x25/0x30 [ 30.362141] __kasan_slab_alloc+0x59/0x70 [ 30.362663] kmem_cache_alloc+0x16b/0x370 [ 30.363180] vm_area_dup+0x20/0x160 [ 30.363640] __split_vma+0x170/0x950 [ 30.364107] split_vma+0xc6/0x110 [ 30.364539] mprotect_fixup+0x8d2/0xb30 [ 30.365053] do_mprotect_pkey+0x87e/0xd40 [ 30.365575] __x64_sys_mprotect+0x78/0xc0 [ 30.366105] do_syscall_64+0x3f/0x90 [ 30.366582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.367222] [ 30.367435] Freed by task 213: [ 30.367828] kasan_save_stack+0x22/0x50 [ 30.368337] kasan_set_track+0x25/0x30 [ 30.368834] kasan_save_free_info+0x2b/0x50 [ 30.369365] __kasan_slab_free+0x10a/0x190 [ 30.369902] kmem_cache_free+0x10d/0x4d0 [ 30.370403] rcu_core+0x8c8/0x2860 [ 30.370849] __do_softirq+0x1b7/0x7d4 [ 30.371461] [ 30.371682] Last potentially related work creation: [ 30.372273] kasan_save_stack+0x22/0x50 [ 30.372795] __kasan_record_aux_stack+0x8e/0xa0 [ 30.373378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.374028] remove_vma+0x139/0x170 [ 30.374473] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.375039] do_vmi_munmap+0x1f1/0x2b0 [ 30.375525] __vm_munmap+0x138/0x3a0 [ 30.375984] __x64_sys_munmap+0x59/0x80 [ 30.376479] do_syscall_64+0x3f/0x90 [ 30.376958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377600] [ 30.377816] The buggy address belongs to the object at ffff88800dea9bc8 [ 30.377816] which belongs to the cache vm_area_struct of size 168 [ 30.379282] The buggy address is located 88 bytes inside of [ 30.379282] freed 168-byte region [ffff88800dea9bc8, ffff88800dea9c70) [ 30.380692] [ 30.380907] The buggy address belongs to the physical page: [ 30.381565] page:00000000d6291f21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea9 [ 30.382650] memcg:ffff88800fc5e801 [ 30.383072] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.383715] page_type: 0xffffffff() [ 30.384167] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.385101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc5e801 [ 30.386011] page dumped because: kasan: bad access detected [ 30.386664] [ 30.386872] Memory state around the buggy address: [ 30.387454] ffff88800dea9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.388303] ffff88800dea9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.389166] >ffff88800dea9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.390010] ^ [ 30.390536] ffff88800dea9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.391377] ffff88800dea9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.392227] ================================================================== [ 30.393174] Disabling lock debugging due to kernel taint [ 33.195478] BUG: Bad rss-counter state mm:00000000ffa03dd6 type:MM_FILEPAGES val:33 [ 33.196726] BUG: Bad rss-counter state mm:00000000ffa03dd6 type:MM_ANONPAGES val:22 [ 33.575823] BUG: Bad rss-counter state mm:000000006933947e type:MM_FILEPAGES val:33 [ 33.577010] BUG: Bad rss-counter state mm:000000006933947e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61387' (ECDSA) to the list of known hosts. 2023/06/20 12:23:49 fuzzer started 2023/06/20 12:23:49 dialing manager at localhost:36067 2023/06/20 12:23:49 checking machine... 2023/06/20 12:23:49 checking revisions... [ 34.288458] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:23:49 testing simple program... [ 34.328994] cgroup: Unknown subsys name 'net' [ 34.366420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:23:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f0f8eeca650 CR3=000000000d870000 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=2038343a33323a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a33323a3231203032 XMM08=00000000000000000000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880166076a8 RCX=0000000000000001 RDX=1ffff11002cc0ed6 RSI=ffff888016607f58 RDI=ffff8880166076b8 RBP=ffff888016607f58 RSP=ffff888016607600 R8 =ffffffff864bbb58 R9 =ffff8880166076e8 R10=0000000000038001 R11=00000000000b6a61 R12=00000000000000a8 R13=ffff888016600000 R14=ffff888016607f58 R15=ffff8880166076a8 RIP=ffffffff81130453 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 00007f7417e01900 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=00007ffd9af36000 CR3=000000000e59e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000