syzkaller login: [ 30.686377] BUG: Bad rss-counter state mm:0000000092b5fc3b type:MM_FILEPAGES val:33 [ 30.687329] BUG: Bad rss-counter state mm:0000000092b5fc3b type:MM_ANONPAGES val:22 [ 30.844858] ================================================================== [ 30.845797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.846779] Read of size 8 at addr ffff888016fd7880 by task sshd/219 [ 30.847591] [ 30.847814] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.848926] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.849907] Call Trace: [ 30.850229] [ 30.850517] dump_stack_lvl+0x91/0xf0 [ 30.851039] print_report+0xcc/0x620 [ 30.851522] ? __virt_addr_valid+0x102/0x340 [ 30.852079] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852723] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853341] kasan_report+0xbe/0xf0 [ 30.853814] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854437] vma_interval_tree_remove+0xc75/0xec0 [ 30.855043] vma_prepare+0xc54/0x11a0 [ 30.855521] __split_vma+0x5af/0x950 [ 30.855990] ? __pfx___split_vma+0x10/0x10 [ 30.856548] ? find_held_lock+0x2c/0x110 [ 30.857074] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.857642] ? lock_is_held_type+0x9f/0x120 [ 30.858185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.858794] ? mtree_range_walk+0x632/0x900 [ 30.859346] ? mas_walk+0x5c7/0x7c0 [ 30.859823] do_vmi_munmap+0x1f1/0x2b0 [ 30.860342] mmap_region+0x1f9/0x2660 [ 30.860826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.861344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.862067] ? __pfx_lock_acquire+0x10/0x10 [ 30.862605] ? __pfx_mmap_region+0x10/0x10 [ 30.863139] ? security_mmap_addr+0x7d/0xa0 [ 30.863670] ? get_unmapped_area+0x1f5/0x3f0 [ 30.864264] do_mmap+0x854/0xf00 [ 30.864724] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.865235] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.865810] ksys_mmap_pgoff+0x3af/0x500 [ 30.866335] do_syscall_64+0x3f/0x90 [ 30.866833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867490] RIP: 0033:0x7f305bee8d82 [ 30.867960] 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 [ 30.870224] RSP: 002b:00007ffc3d673748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.871185] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f305bee8d82 [ 30.872080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f305b322000 [ 30.872981] RBP: 00007f305b322000 R08: 0000000000000009 R09: 0000000000001000 [ 30.873879] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f45afd9f70 [ 30.874770] R13: 00007ffc3d673760 R14: 00007ffc3d673790 R15: 00007ffc3d673af0 [ 30.875676] [ 30.875980] [ 30.876217] Allocated by task 212: [ 30.876676] kasan_save_stack+0x22/0x50 [ 30.877208] kasan_set_track+0x25/0x30 [ 30.877724] __kasan_slab_alloc+0x59/0x70 [ 30.878279] kmem_cache_alloc+0x16b/0x370 [ 30.878833] vm_area_dup+0x20/0x160 [ 30.879321] __split_vma+0x170/0x950 [ 30.879813] split_vma+0xc6/0x110 [ 30.880291] mprotect_fixup+0x8d2/0xb30 [ 30.880823] do_mprotect_pkey+0x87e/0xd40 [ 30.881374] __x64_sys_mprotect+0x78/0xc0 [ 30.881920] do_syscall_64+0x3f/0x90 [ 30.882416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883086] [ 30.883311] Freed by task 212: [ 30.883728] kasan_save_stack+0x22/0x50 [ 30.884270] kasan_set_track+0x25/0x30 [ 30.884785] kasan_save_free_info+0x2b/0x50 [ 30.885347] __kasan_slab_free+0x10a/0x190 [ 30.885907] kmem_cache_free+0x10d/0x4d0 [ 30.886447] rcu_core+0x8c8/0x2860 [ 30.886919] __do_softirq+0x1b7/0x7d4 [ 30.887420] [ 30.887645] Last potentially related work creation: [ 30.888290] kasan_save_stack+0x22/0x50 [ 30.888822] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890186] remove_vma+0x139/0x170 [ 30.890661] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891251] do_vmi_munmap+0x1f1/0x2b0 [ 30.891770] __vm_munmap+0x138/0x3a0 [ 30.892278] __x64_sys_munmap+0x59/0x80 [ 30.892796] do_syscall_64+0x3f/0x90 [ 30.893304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893985] [ 30.894211] The buggy address belongs to the object at ffff888016fd7828 [ 30.894211] which belongs to the cache vm_area_struct of size 168 [ 30.895759] The buggy address is located 88 bytes inside of [ 30.895759] freed 168-byte region [ffff888016fd7828, ffff888016fd78d0) [ 30.897274] [ 30.897501] The buggy address belongs to the physical page: [ 30.898208] page:000000003ee1bd6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fd7 [ 30.899369] memcg:ffff88800ec42f01 [ 30.899821] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.900518] page_type: 0xffffffff() [ 30.900992] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.901978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec42f01 [ 30.902947] page dumped because: kasan: bad access detected [ 30.903644] [ 30.903866] Memory state around the buggy address: [ 30.904491] ffff888016fd7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.905391] ffff888016fd7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.906297] >ffff888016fd7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.907207] ^ [ 30.907640] ffff888016fd7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.908561] ffff888016fd7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.909471] ================================================================== [ 30.910435] Disabling lock debugging due to kernel taint [ 33.412058] BUG: Bad rss-counter state mm:000000005f94b2c9 type:MM_FILEPAGES val:33 [ 33.413275] BUG: Bad rss-counter state mm:000000005f94b2c9 type:MM_ANONPAGES val:22 [ 33.896390] BUG: Bad rss-counter state mm:00000000c83088c4 type:MM_FILEPAGES val:33 [ 33.897423] BUG: Bad rss-counter state mm:00000000c83088c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53858' (ECDSA) to the list of known hosts. 2023/06/19 11:02:16 fuzzer started 2023/06/19 11:02:16 dialing manager at localhost:44161 2023/06/19 11:02:16 checking machine... 2023/06/19 11:02:16 checking revisions... [ 34.632194] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:02:16 testing simple program... [ 34.684490] cgroup: Unknown subsys name 'net' [ 34.728145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:02:15 Registers: info registers vcpu 0 RAX=1ffff11002053b8f RBX=ffff88801029dc48 RCX=1ffff11001a4b8d2 RDX=dffffc0000000000 RSI=ffff88800d9505e8 RDI=ffff88801029dc78 RBP=ffff88800d95f1a8 RSP=ffff888015fbf6b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800d950500 R13=0000000000000000 R14=ffff8880096373d8 R15=ffff888009637390 RIP=ffffffff818474fe 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 00007f85b73fe900 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=00007f85b79b5618 CR3=000000000cb8a000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f6b61a70e10 CR3=00000000099b8000 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=085da4f6f48109bca547b4098db9b8a0 XMM02=000000000011c870ec2efd57dc4c00df XMM03=00000000001241f00e6bb6d98007bc03 XMM04=871136a3a2620d1c00000000000ae988 XMM05=dfcdbad4f1609c370000000000133cd0 XMM06=21239603ea17e17b0000000000132b38 XMM07=e042d86d42eb936e0000000000124470 XMM08=0e6bb6d98007bc03000000000011c8d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000