syzkaller login: [ 43.467148] BUG: Bad rss-counter state mm:000000004b82e356 type:MM_FILEPAGES val:33 [ 43.467828] BUG: Bad rss-counter state mm:000000004b82e356 type:MM_ANONPAGES val:22 [ 43.642200] ================================================================== [ 43.642810] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.643426] Read of size 8 at addr ffff88800dc93310 by task sshd/223 [ 43.643924] [ 43.644071] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.644628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.660963] Call Trace: [ 43.661183] [ 43.661376] dump_stack_lvl+0x91/0xf0 [ 43.661706] print_report+0xcc/0x620 [ 43.662039] ? __virt_addr_valid+0x102/0x340 [ 43.662403] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.662809] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.663212] kasan_report+0xbe/0xf0 [ 43.663532] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.663938] vma_interval_tree_remove+0xc75/0xec0 [ 43.664286] vma_prepare+0xc54/0x11a0 [ 43.664563] __split_vma+0x5af/0x950 [ 43.664833] ? __pfx___split_vma+0x10/0x10 [ 43.665152] ? find_held_lock+0x2c/0x110 [ 43.665454] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.665804] ? lock_is_held_type+0x9f/0x120 [ 43.666110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.666453] ? mtree_range_walk+0x632/0x900 [ 43.666783] ? mas_walk+0x5c7/0x7c0 [ 43.667079] do_vmi_munmap+0x1f1/0x2b0 [ 43.667361] mmap_region+0x1f9/0x2660 [ 43.667636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.667929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.668334] ? __pfx_lock_acquire+0x10/0x10 [ 43.668638] ? __pfx_mmap_region+0x10/0x10 [ 43.668969] ? security_mmap_addr+0x7d/0xa0 [ 43.669276] ? get_unmapped_area+0x1f5/0x3f0 [ 43.669589] do_mmap+0x854/0xf00 [ 43.669840] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.670157] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.670527] ksys_mmap_pgoff+0x3af/0x500 [ 43.670866] do_syscall_64+0x3f/0x90 [ 43.671186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.671614] RIP: 0033:0x7f47107cfd82 [ 43.671947] 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 [ 43.673365] RSP: 002b:00007ffd7b3dbb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.673947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47107cfd82 [ 43.674474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f470fc09000 [ 43.675027] RBP: 00007f470fc09000 R08: 0000000000000009 R09: 0000000000001000 [ 43.675581] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc30313ec0 [ 43.676135] R13: 00007ffd7b3dbb40 R14: 00007ffd7b3dbb70 R15: 00007ffd7b3dbed0 [ 43.676710] [ 43.676934] [ 43.677081] Allocated by task 214: [ 43.677362] kasan_save_stack+0x22/0x50 [ 43.677699] kasan_set_track+0x25/0x30 [ 43.678073] __kasan_slab_alloc+0x59/0x70 [ 43.678423] kmem_cache_alloc+0x16b/0x370 [ 43.678768] vm_area_dup+0x20/0x160 [ 43.679072] __split_vma+0x170/0x950 [ 43.679384] split_vma+0xc6/0x110 [ 43.679678] mprotect_fixup+0x8d2/0xb30 [ 43.680014] do_mprotect_pkey+0x87e/0xd40 [ 43.680361] __x64_sys_mprotect+0x78/0xc0 [ 43.680709] do_syscall_64+0x3f/0x90 [ 43.681063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.681486] [ 43.681630] Freed by task 13: [ 43.681910] kasan_save_stack+0x22/0x50 [ 43.682239] kasan_set_track+0x25/0x30 [ 43.682568] kasan_save_free_info+0x2b/0x50 [ 43.682962] __kasan_slab_free+0x10a/0x190 [ 43.683318] kmem_cache_free+0x10d/0x4d0 [ 43.683656] rcu_core+0x8c8/0x2860 [ 43.683953] __do_softirq+0x1b7/0x7d4 [ 43.684271] [ 43.684418] Last potentially related work creation: [ 43.684801] kasan_save_stack+0x22/0x50 [ 43.685155] __kasan_record_aux_stack+0x8e/0xa0 [ 43.685533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.685954] remove_vma+0x139/0x170 [ 43.686248] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.686607] do_vmi_munmap+0x1f1/0x2b0 [ 43.686931] __vm_munmap+0x138/0x3a0 [ 43.687245] __x64_sys_munmap+0x59/0x80 [ 43.687577] do_syscall_64+0x3f/0x90 [ 43.687896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.688317] [ 43.688462] The buggy address belongs to the object at ffff88800dc932b8 [ 43.688462] which belongs to the cache vm_area_struct of size 168 [ 43.689451] The buggy address is located 88 bytes inside of [ 43.689451] freed 168-byte region [ffff88800dc932b8, ffff88800dc93360) [ 43.690360] [ 43.690507] The buggy address belongs to the physical page: [ 43.690936] page:000000008cbec709 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc93 [ 43.691643] memcg:ffff88800dca9401 [ 43.691930] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.692388] page_type: 0xffffffff() [ 43.692696] raw: 0100000000000200 ffff88800879fc80 ffffea000037c3c0 dead000000000007 [ 43.697371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dca9401 [ 43.697964] page dumped because: kasan: bad access detected [ 43.698395] [ 43.698535] Memory state around the buggy address: [ 43.698897] ffff88800dc93200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.699458] ffff88800dc93280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.700015] >ffff88800dc93300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.700571] ^ [ 43.700880] ffff88800dc93380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.701471] ffff88800dc93400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.702006] ================================================================== [ 43.702812] Disabling lock debugging due to kernel taint [ 45.742905] BUG: Bad rss-counter state mm:000000005fb5d5b4 type:MM_FILEPAGES val:33 [ 45.743570] BUG: Bad rss-counter state mm:000000005fb5d5b4 type:MM_ANONPAGES val:22 [ 46.548746] BUG: Bad rss-counter state mm:000000000d2f4df0 type:MM_FILEPAGES val:33 [ 46.549857] BUG: Bad rss-counter state mm:000000000d2f4df0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50666' (ECDSA) to the list of known hosts. 2023/06/20 08:23:06 fuzzer started 2023/06/20 08:23:06 dialing manager at localhost:44161 2023/06/20 08:23:06 checking machine... 2023/06/20 08:23:06 checking revisions... [ 47.711509] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:23:06 testing simple program... [ 47.778783] cgroup: Unknown subsys name 'net' [ 47.860190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:23:01 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=0000000000000000 RCX=ffffffff813c9176 RDX=ffff88801707d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88806ce2c250 RSP=ffff88806ce09dc8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=ffff88806ce2c250 R13=ffff88806ce2c240 R14=ffff8880146d73f8 R15=dffffc0000000000 RIP=ffffffff814c07eb RFL=00000046 [---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=00007f8460c91790 CR3=000000000dc7c000 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=0000000000000018fffffffe7ffbfeff XMM01=de7dfbaa34efa50d0000565400000030 XMM02=de7dfbaa34efa50d416971f163115480 XMM03=0000000000000002426971f163115480 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=b9112cbaa0f1569f0000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880146d6c10 RCX=0000000000000001 RDX=1ffff110028dad8d RSI=ffff8880146d78b0 RDI=ffffffff81734931 RBP=ffff8880146d6c68 RSP=ffff8880146d6bf8 R8 =0000000000000001 R9 =ffff8880146d6c50 R10=0000000000038001 R11=00000000000b3efa R12=ffff8880146d6cd8 R13=0000000000000000 R14=ffff88801707d1c0 R15=ffff8880146d70e8 RIP=ffffffff811303b2 RFL=00000046 [---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 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=00007f9bda405260 CR3=000000000dc7c000 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=756e696c2d34365f3638782f62696c2f XMM01=732e746964756162696c2f756e672d78 XMM02=00312e6f732e746964756162696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000