syzkaller login: [ 30.571568] BUG: Bad rss-counter state mm:0000000003c2eed4 type:MM_FILEPAGES val:33 [ 30.572828] BUG: Bad rss-counter state mm:0000000003c2eed4 type:MM_ANONPAGES val:22 [ 30.750824] ================================================================== [ 30.751897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.753167] Read of size 8 at addr ffff88800efff310 by task sshd/219 [ 30.754102] [ 30.754372] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.755459] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.756682] Call Trace: [ 30.757082] [ 30.757441] dump_stack_lvl+0x91/0xf0 [ 30.758053] print_report+0xcc/0x620 [ 30.758647] ? __virt_addr_valid+0x102/0x340 [ 30.759344] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760103] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760827] kasan_report+0xbe/0xf0 [ 30.761349] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762021] vma_interval_tree_remove+0xc75/0xec0 [ 30.762668] vma_prepare+0xc54/0x11a0 [ 30.763170] __split_vma+0x5af/0x950 [ 30.763666] ? __pfx___split_vma+0x10/0x10 [ 30.764276] ? find_held_lock+0x2c/0x110 [ 30.764845] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.765464] ? lock_is_held_type+0x9f/0x120 [ 30.766049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.766701] ? mtree_range_walk+0x632/0x900 [ 30.767302] ? mas_walk+0x5c7/0x7c0 [ 30.767819] do_vmi_munmap+0x1f1/0x2b0 [ 30.768387] mmap_region+0x1f9/0x2660 [ 30.768920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.769475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.770248] ? __pfx_lock_acquire+0x10/0x10 [ 30.770823] ? __pfx_mmap_region+0x10/0x10 [ 30.771441] ? security_mmap_addr+0x7d/0xa0 [ 30.772061] ? get_unmapped_area+0x1f5/0x3f0 [ 30.772752] do_mmap+0x854/0xf00 [ 30.773273] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.773849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.774508] ksys_mmap_pgoff+0x3af/0x500 [ 30.775103] do_syscall_64+0x3f/0x90 [ 30.775667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776447] RIP: 0033:0x7fac1b5d5d82 [ 30.776904] 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 [ 30.779017] RSP: 002b:00007ffcfb841a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.779920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac1b5d5d82 [ 30.780793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac1aa0f000 [ 30.781636] RBP: 00007fac1aa0f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.782469] R10: 0000000000000812 R11: 0000000000000206 R12: 000056533ec04f60 [ 30.783314] R13: 00007ffcfb841a40 R14: 00007ffcfb841a70 R15: 00007ffcfb841dd0 [ 30.784192] [ 30.784495] [ 30.784709] Allocated by task 212: [ 30.785138] kasan_save_stack+0x22/0x50 [ 30.785640] kasan_set_track+0x25/0x30 [ 30.786134] __kasan_slab_alloc+0x59/0x70 [ 30.786666] kmem_cache_alloc+0x16b/0x370 [ 30.787206] vm_area_dup+0x20/0x160 [ 30.787681] __split_vma+0x170/0x950 [ 30.788183] split_vma+0xc6/0x110 [ 30.788643] mprotect_fixup+0x8d2/0xb30 [ 30.789168] do_mprotect_pkey+0x87e/0xd40 [ 30.789705] __x64_sys_mprotect+0x78/0xc0 [ 30.790243] do_syscall_64+0x3f/0x90 [ 30.790735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791411] [ 30.791635] Freed by task 19: [ 30.792030] kasan_save_stack+0x22/0x50 [ 30.792578] kasan_set_track+0x25/0x30 [ 30.793088] kasan_save_free_info+0x2b/0x50 [ 30.793638] __kasan_slab_free+0x10a/0x190 [ 30.794194] kmem_cache_free+0x10d/0x4d0 [ 30.794721] rcu_core+0x8c8/0x2860 [ 30.795190] __do_softirq+0x1b7/0x7d4 [ 30.795689] [ 30.795910] Last potentially related work creation: [ 30.796553] kasan_save_stack+0x22/0x50 [ 30.797078] __kasan_record_aux_stack+0x8e/0xa0 [ 30.797677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.798355] remove_vma+0x139/0x170 [ 30.798828] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.799406] do_vmi_munmap+0x1f1/0x2b0 [ 30.799904] __vm_munmap+0x138/0x3a0 [ 30.800426] __x64_sys_munmap+0x59/0x80 [ 30.800936] do_syscall_64+0x3f/0x90 [ 30.801432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802104] [ 30.802327] The buggy address belongs to the object at ffff88800efff2b8 [ 30.802327] which belongs to the cache vm_area_struct of size 168 [ 30.803857] The buggy address is located 88 bytes inside of [ 30.803857] freed 168-byte region [ffff88800efff2b8, ffff88800efff360) [ 30.805351] [ 30.805577] The buggy address belongs to the physical page: [ 30.806262] page:00000000a0e16a8f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefff [ 30.807392] memcg:ffff88800cf43b01 [ 30.807834] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.808607] page_type: 0xffffffff() [ 30.809072] raw: 0100000000000200 ffff8880087a0c80 ffffea000032d940 000000000000000b [ 30.810035] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf43b01 [ 30.810973] page dumped because: kasan: bad access detected [ 30.811664] [ 30.811888] Memory state around the buggy address: [ 30.812525] ffff88800efff200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.813415] ffff88800efff280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.814304] >ffff88800efff300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.815186] ^ [ 30.815667] ffff88800efff380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.816591] ffff88800efff400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.817483] ================================================================== [ 30.818490] Disabling lock debugging due to kernel taint [ 32.743774] BUG: Bad rss-counter state mm:00000000dd6af7d3 type:MM_FILEPAGES val:33 [ 32.745225] BUG: Bad rss-counter state mm:00000000dd6af7d3 type:MM_ANONPAGES val:22 [ 33.226075] BUG: Bad rss-counter state mm:000000007ef81240 type:MM_FILEPAGES val:33 [ 33.227135] BUG: Bad rss-counter state mm:000000007ef81240 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25125' (ECDSA) to the list of known hosts. 2023/06/20 15:20:53 fuzzer started 2023/06/20 15:20:54 dialing manager at localhost:36067 2023/06/20 15:20:54 checking machine... 2023/06/20 15:20:54 checking revisions... [ 33.980591] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:20:54 testing simple program... [ 34.034446] cgroup: Unknown subsys name 'net' [ 34.073441] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:20:53 Registers: info registers vcpu 0 RAX=ffffffff836373ca RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffff88800d6ffb10 RDI=ffffffff836373ca RBP=ffff88806ce09b08 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000008a88c R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff88800d951b40 R15=ffff888018067c38 RIP=ffffffff811303ba 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 00007f0f8cbde900 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=00007f1f7bb34650 CR3=0000000009f96000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=4000a1dd88ee2f4700000000000ae988 XMM05=3b0a57bcb20b8e3f0000000000132ce0 XMM06=806171799158d9670000000000131ad0 XMM07=fb795ef6d65770560000000000121d78 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff813b99dc RDX=ffff888015e53680 RSI=0000000000000100 RDI=0000000000000001 RBP=0000000000000101 RSP=ffff88806cf09d20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88806cf09d60 R13=1ffff1100d9e13a6 R14=ffff888008da7c98 R15=ffffffff813b9550 RIP=ffffffff814c0860 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 00007f1f7b57f900 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=00007f1f7bb36618 CR3=00000000096fa000 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=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