syzkaller login: [ 31.327152] BUG: Bad rss-counter state mm:000000008e2dd02f type:MM_FILEPAGES val:33 [ 31.328473] BUG: Bad rss-counter state mm:000000008e2dd02f type:MM_ANONPAGES val:22 [ 31.489730] ================================================================== [ 31.490599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.491483] Read of size 8 at addr ffff8880186d1228 by task sshd/219 [ 31.492203] [ 31.492416] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.493241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.494391] Call Trace: [ 31.494692] [ 31.494962] dump_stack_lvl+0x91/0xf0 [ 31.495431] print_report+0xcc/0x620 [ 31.496013] ? __virt_addr_valid+0x102/0x340 [ 31.496672] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.497427] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.498171] kasan_report+0xbe/0xf0 [ 31.498767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.499563] vma_interval_tree_remove+0xc75/0xec0 [ 31.500295] vma_prepare+0xc54/0x11a0 [ 31.500887] __split_vma+0x5af/0x950 [ 31.501499] ? __pfx___split_vma+0x10/0x10 [ 31.502122] ? find_held_lock+0x2c/0x110 [ 31.502642] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.503206] ? lock_is_held_type+0x9f/0x120 [ 31.503735] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.504343] ? mtree_range_walk+0x632/0x900 [ 31.504896] ? mas_walk+0x5c7/0x7c0 [ 31.505378] do_vmi_munmap+0x1f1/0x2b0 [ 31.505867] mmap_region+0x1f9/0x2660 [ 31.506346] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.506852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.507549] ? __pfx_lock_acquire+0x10/0x10 [ 31.508086] ? __pfx_mmap_region+0x10/0x10 [ 31.508617] ? security_mmap_addr+0x7d/0xa0 [ 31.509139] ? get_unmapped_area+0x1f5/0x3f0 [ 31.509694] do_mmap+0x854/0xf00 [ 31.510137] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.510620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.511184] ksys_mmap_pgoff+0x3af/0x500 [ 31.511678] do_syscall_64+0x3f/0x90 [ 31.512159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.512806] RIP: 0033:0x7f3285d57d82 [ 31.513271] 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 [ 31.515380] RSP: 002b:00007ffebb2435c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.516275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3285d57d82 [ 31.517113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3285191000 [ 31.517963] RBP: 00007f3285191000 R08: 0000000000000009 R09: 0000000000001000 [ 31.518801] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625dff80d90 [ 31.519637] R13: 00007ffebb2435e0 R14: 00007ffebb243610 R15: 00007ffebb243970 [ 31.520482] [ 31.520768] [ 31.520985] Allocated by task 212: [ 31.521419] kasan_save_stack+0x22/0x50 [ 31.521922] kasan_set_track+0x25/0x30 [ 31.522410] __kasan_slab_alloc+0x59/0x70 [ 31.522935] kmem_cache_alloc+0x16b/0x370 [ 31.523450] vm_area_dup+0x20/0x160 [ 31.523896] __split_vma+0x170/0x950 [ 31.524354] split_vma+0xc6/0x110 [ 31.524794] mprotect_fixup+0x8d2/0xb30 [ 31.525309] do_mprotect_pkey+0x87e/0xd40 [ 31.525832] __x64_sys_mprotect+0x78/0xc0 [ 31.526343] do_syscall_64+0x3f/0x90 [ 31.526817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.527455] [ 31.527664] Freed by task 202: [ 31.528057] kasan_save_stack+0x22/0x50 [ 31.528556] kasan_set_track+0x25/0x30 [ 31.529052] kasan_save_free_info+0x2b/0x50 [ 31.529596] __kasan_slab_free+0x10a/0x190 [ 31.530129] kmem_cache_free+0x10d/0x4d0 [ 31.530628] rcu_core+0x8c8/0x2860 [ 31.531084] __do_softirq+0x1b7/0x7d4 [ 31.531546] [ 31.531758] Last potentially related work creation: [ 31.532343] kasan_save_stack+0x22/0x50 [ 31.532840] __kasan_record_aux_stack+0x8e/0xa0 [ 31.533419] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.534059] remove_vma+0x139/0x170 [ 31.534502] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.535057] do_vmi_munmap+0x1f1/0x2b0 [ 31.535660] __vm_munmap+0x138/0x3a0 [ 31.536128] __x64_sys_munmap+0x59/0x80 [ 31.536627] do_syscall_64+0x3f/0x90 [ 31.537099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.537763] [ 31.537983] The buggy address belongs to the object at ffff8880186d11d0 [ 31.537983] which belongs to the cache vm_area_struct of size 168 [ 31.539436] The buggy address is located 88 bytes inside of [ 31.539436] freed 168-byte region [ffff8880186d11d0, ffff8880186d1278) [ 31.540820] [ 31.541036] The buggy address belongs to the physical page: [ 31.541694] page:00000000373ec2aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186d1 [ 31.542774] memcg:ffff88801a2e4301 [ 31.543192] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.543829] page_type: 0xffffffff() [ 31.544278] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.545215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2e4301 [ 31.546115] page dumped because: kasan: bad access detected [ 31.546773] [ 31.546987] Memory state around the buggy address: [ 31.547560] ffff8880186d1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.548421] ffff8880186d1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.549289] >ffff8880186d1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.550137] ^ [ 31.550693] ffff8880186d1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.551542] ffff8880186d1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.552388] ================================================================== [ 31.553519] Disabling lock debugging due to kernel taint [ 33.689151] BUG: Bad rss-counter state mm:00000000e884d615 type:MM_FILEPAGES val:33 [ 33.690155] BUG: Bad rss-counter state mm:00000000e884d615 type:MM_ANONPAGES val:22 [ 34.145952] BUG: Bad rss-counter state mm:00000000daf133ff type:MM_FILEPAGES val:33 [ 34.147105] BUG: Bad rss-counter state mm:00000000daf133ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29559' (ECDSA) to the list of known hosts. 2023/06/20 18:30:40 fuzzer started 2023/06/20 18:30:41 dialing manager at localhost:36067 2023/06/20 18:30:41 checking machine... 2023/06/20 18:30:41 checking revisions... [ 34.813169] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:30:41 testing simple program... [ 34.862228] cgroup: Unknown subsys name 'net' [ 34.932368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:30:40 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000a6525d6d RCX=ffff88806c52eb68 RDX=000000000000000d RSI=0000000000000002 RDI=0000000090057691 RBP=ffff888009eba310 RSP=ffff8880165bf458 R8 =000000005e4275f3 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=00000000000128c0 R14=ffff8880165bf4c0 R15=000000000000000d RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f2f6b291900 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=00007f2f6b848618 CR3=000000000f250000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f0d012fa4d0 CR3=000000000d798000 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=028da2f0c2b279ac5940a0fdbd1dd7d0 XMM02=ec2efd57dc4c00df000000000011af08 XMM03=897371e024a4b3e1000000000011afd8 XMM04=89cf90c442244f8f00000000000ae988 XMM05=dfcdbad4f1609c370000000000132358 XMM06=cfcd4ded78b2c09b00000000001311c0 XMM07=e042d86d42eb936e0000000000122770 XMM08=897371e024a4b3e1000000000011afd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000