syzkaller login: [ 31.506783] BUG: Bad rss-counter state mm:00000000290301a0 type:MM_FILEPAGES val:33 [ 31.508114] BUG: Bad rss-counter state mm:00000000290301a0 type:MM_ANONPAGES val:22 [ 31.666323] ================================================================== [ 31.667446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.668563] Read of size 8 at addr ffff888018c43df0 by task sshd/221 [ 31.669734] [ 31.669990] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.671048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.672038] Call Trace: [ 31.672360] [ 31.672643] dump_stack_lvl+0x91/0xf0 [ 31.673130] print_report+0xcc/0x620 [ 31.673612] ? __virt_addr_valid+0x102/0x340 [ 31.674158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674770] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.675390] kasan_report+0xbe/0xf0 [ 31.675863] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.676474] vma_interval_tree_remove+0xc75/0xec0 [ 31.677070] vma_prepare+0xc54/0x11a0 [ 31.677548] __split_vma+0x5af/0x950 [ 31.678014] ? __pfx___split_vma+0x10/0x10 [ 31.678539] ? find_held_lock+0x2c/0x110 [ 31.679064] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.679625] ? lock_is_held_type+0x9f/0x120 [ 31.680157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.680759] ? mtree_range_walk+0x632/0x900 [ 31.681310] ? mas_walk+0x5c7/0x7c0 [ 31.681785] do_vmi_munmap+0x1f1/0x2b0 [ 31.682273] mmap_region+0x1f9/0x2660 [ 31.682753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.683279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.683991] ? __pfx_lock_acquire+0x10/0x10 [ 31.684518] ? __pfx_mmap_region+0x10/0x10 [ 31.685041] ? security_mmap_addr+0x7d/0xa0 [ 31.685575] ? get_unmapped_area+0x1f5/0x3f0 [ 31.686122] do_mmap+0x854/0xf00 [ 31.686557] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.687068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.687640] ksys_mmap_pgoff+0x3af/0x500 [ 31.688154] do_syscall_64+0x3f/0x90 [ 31.688656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.689319] RIP: 0033:0x7f7e2a888d82 [ 31.689779] 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 [ 31.691943] RSP: 002b:00007fff51ed81b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.692863] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e2a888d82 [ 31.693731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e29cc2000 [ 31.694588] RBP: 00007f7e29cc2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.695456] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ef1df6ec0 [ 31.696324] R13: 00007fff51ed81d0 R14: 00007fff51ed8200 R15: 00007fff51ed8560 [ 31.697194] [ 31.697489] [ 31.697702] Allocated by task 214: [ 31.698131] kasan_save_stack+0x22/0x50 [ 31.698639] kasan_set_track+0x25/0x30 [ 31.699158] __kasan_slab_alloc+0x59/0x70 [ 31.699676] kmem_cache_alloc+0x16b/0x370 [ 31.700203] vm_area_dup+0x20/0x160 [ 31.700656] __split_vma+0x170/0x950 [ 31.701119] split_vma+0xc6/0x110 [ 31.701569] mprotect_fixup+0x8d2/0xb30 [ 31.702080] do_mprotect_pkey+0x87e/0xd40 [ 31.702611] __x64_sys_mprotect+0x78/0xc0 [ 31.703160] do_syscall_64+0x3f/0x90 [ 31.703636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704290] [ 31.704507] Freed by task 204: [ 31.704897] kasan_save_stack+0x22/0x50 [ 31.705404] kasan_set_track+0x25/0x30 [ 31.705913] kasan_save_free_info+0x2b/0x50 [ 31.706447] __kasan_slab_free+0x10a/0x190 [ 31.706998] kmem_cache_free+0x10d/0x4d0 [ 31.707507] rcu_core+0x8c8/0x2860 [ 31.707946] __do_softirq+0x1b7/0x7d4 [ 31.708429] [ 31.708643] Last potentially related work creation: [ 31.709231] kasan_save_stack+0x22/0x50 [ 31.709742] __kasan_record_aux_stack+0x8e/0xa0 [ 31.710317] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.711057] remove_vma+0x139/0x170 [ 31.711508] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.712075] do_vmi_munmap+0x1f1/0x2b0 [ 31.712568] __vm_munmap+0x138/0x3a0 [ 31.713032] __x64_sys_munmap+0x59/0x80 [ 31.713528] do_syscall_64+0x3f/0x90 [ 31.714005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.714657] [ 31.714872] The buggy address belongs to the object at ffff888018c43d98 [ 31.714872] which belongs to the cache vm_area_struct of size 168 [ 31.716370] The buggy address is located 88 bytes inside of [ 31.716370] freed 168-byte region [ffff888018c43d98, ffff888018c43e40) [ 31.717779] [ 31.717999] The buggy address belongs to the physical page: [ 31.718659] page:000000003c25b010 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c43 [ 31.719784] memcg:ffff88800981ad01 [ 31.720215] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.720875] page_type: 0xffffffff() [ 31.721342] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.722280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800981ad01 [ 31.723208] page dumped because: kasan: bad access detected [ 31.723878] [ 31.724096] Memory state around the buggy address: [ 31.724676] ffff888018c43c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.725539] ffff888018c43d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.726395] >ffff888018c43d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.727278] ^ [ 31.728084] ffff888018c43e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.728943] ffff888018c43e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.729789] ================================================================== [ 31.730724] Disabling lock debugging due to kernel taint [ 33.563514] BUG: Bad rss-counter state mm:000000002890d973 type:MM_FILEPAGES val:33 [ 33.564213] BUG: Bad rss-counter state mm:000000002890d973 type:MM_ANONPAGES val:22 [ 33.937945] BUG: Bad rss-counter state mm:00000000f830eb76 type:MM_FILEPAGES val:33 [ 33.938543] BUG: Bad rss-counter state mm:00000000f830eb76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8575' (ECDSA) to the list of known hosts. 2023/06/21 05:17:28 fuzzer started 2023/06/21 05:17:28 dialing manager at localhost:36067 2023/06/21 05:17:28 checking machine... 2023/06/21 05:17:28 checking revisions... [ 34.613626] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:17:28 testing simple program... [ 34.669235] cgroup: Unknown subsys name 'net' [ 34.706211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:17:27 Registers: info registers vcpu 0 RAX=0000000000000200 RBX=0000000000000201 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8386872d RBP=ffffffff8386872d RSP=ffff88801768fb08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800fdc64f8 R13=00000000000000e6 R14=ffff888008fe8000 R15=ffff88800fdc6000 RIP=ffffffff812dc120 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 00007fcb13d78900 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=00007fffdf84bff8 CR3=000000000eb2e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000074c0177 RBX=ffff88801764da70 RCX=ffff88801764d000 RDX=0000000000000080 RSI=ffff88801764d980 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09dc0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffff88800844f780 R13=ffffea0000398040 R14=ffffffff813782f8 R15=ffff88800e601a10 RIP=ffffffff8180eff0 RFL=00000282 [--S----] 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=00007fd238121310 CR3=000000000c406000 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=cf4058f358d0fcbac747859c640200ce XMM02=000000000011bfb8ec2efd57dc4c00df XMM03=00000000001230903db329988e730a44 XMM04=ecbec5f282d06d5400000000000ae988 XMM05=e4cb8bb95a7664b60000000000132e70 XMM06=6f46e006644c28fc0000000000131cd8 XMM07=e042d86d42eb936e0000000000123310 XMM08=3db329988e730a44000000000011c018 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000