syzkaller login: [ 38.834077] BUG: Bad rss-counter state mm:00000000fda503a3 type:MM_FILEPAGES val:33 [ 38.835250] BUG: Bad rss-counter state mm:00000000fda503a3 type:MM_ANONPAGES val:22 [ 38.873820] ================================================================== [ 38.874916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.875961] Read of size 8 at addr ffff88800e3a3df0 by task sshd/219 [ 38.876869] [ 38.877178] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.878132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.879247] Call Trace: [ 38.879647] [ 38.879930] dump_stack_lvl+0x91/0xf0 [ 38.880521] print_report+0xcc/0x620 [ 38.881101] ? __virt_addr_valid+0x102/0x340 [ 38.881769] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882467] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883156] kasan_report+0xbe/0xf0 [ 38.883632] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884261] vma_interval_tree_remove+0xc75/0xec0 [ 38.885011] vma_prepare+0xc54/0x11a0 [ 38.885495] __split_vma+0x5af/0x950 [ 38.885982] ? __pfx___split_vma+0x10/0x10 [ 38.886516] ? find_held_lock+0x2c/0x110 [ 38.887043] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.887648] ? lock_is_held_type+0x9f/0x120 [ 38.888288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.888891] ? mtree_range_walk+0x632/0x900 [ 38.889473] ? mas_walk+0x5c7/0x7c0 [ 38.890096] do_vmi_munmap+0x1f1/0x2b0 [ 38.890669] mmap_region+0x1f9/0x2660 [ 38.891161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.891766] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.892638] ? __pfx_lock_acquire+0x10/0x10 [ 38.893271] ? __pfx_mmap_region+0x10/0x10 [ 38.893840] ? security_mmap_addr+0x7d/0xa0 [ 38.894380] ? get_unmapped_area+0x1f5/0x3f0 [ 38.894928] do_mmap+0x854/0xf00 [ 38.895371] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.896429] ksys_mmap_pgoff+0x3af/0x500 [ 38.896932] do_syscall_64+0x3f/0x90 [ 38.897409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.898082] RIP: 0033:0x7f2146758d82 [ 38.898543] 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 [ 38.900680] RSP: 002b:00007ffd9e982a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2146758d82 [ 38.902440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2145b92000 [ 38.903291] RBP: 00007f2145b92000 R08: 0000000000000009 R09: 0000000000001000 [ 38.904132] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565260487ec0 [ 38.904974] R13: 00007ffd9e982aa0 R14: 00007ffd9e982ad0 R15: 00007ffd9e982e30 [ 38.905842] [ 38.906133] [ 38.906349] Allocated by task 212: [ 38.906776] kasan_save_stack+0x22/0x50 [ 38.907288] kasan_set_track+0x25/0x30 [ 38.907789] __kasan_slab_alloc+0x59/0x70 [ 38.908312] kmem_cache_alloc+0x16b/0x370 [ 38.908827] vm_area_dup+0x20/0x160 [ 38.909285] __split_vma+0x170/0x950 [ 38.909772] split_vma+0xc6/0x110 [ 38.910221] mprotect_fixup+0x8d2/0xb30 [ 38.910727] do_mprotect_pkey+0x87e/0xd40 [ 38.911258] __x64_sys_mprotect+0x78/0xc0 [ 38.911779] do_syscall_64+0x3f/0x90 [ 38.912264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912911] [ 38.913127] Freed by task 212: [ 38.913523] kasan_save_stack+0x22/0x50 [ 38.914049] kasan_set_track+0x25/0x30 [ 38.914542] kasan_save_free_info+0x2b/0x50 [ 38.915086] __kasan_slab_free+0x10a/0x190 [ 38.915618] kmem_cache_free+0x10d/0x4d0 [ 38.916129] rcu_core+0x8c8/0x2860 [ 38.916570] __do_softirq+0x1b7/0x7d4 [ 38.917067] [ 38.917281] Last potentially related work creation: [ 38.917886] kasan_save_stack+0x22/0x50 [ 38.918466] __kasan_record_aux_stack+0x8e/0xa0 [ 38.919050] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.919694] remove_vma+0x139/0x170 [ 38.920157] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920721] do_vmi_munmap+0x1f1/0x2b0 [ 38.921215] __vm_munmap+0x138/0x3a0 [ 38.921693] __x64_sys_munmap+0x59/0x80 [ 38.922190] do_syscall_64+0x3f/0x90 [ 38.922660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923301] [ 38.923516] Second to last potentially related work creation: [ 38.924199] kasan_save_stack+0x22/0x50 [ 38.924704] __kasan_record_aux_stack+0x8e/0xa0 [ 38.925283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.925945] remove_vma+0x139/0x170 [ 38.926398] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.926956] do_vmi_munmap+0x1f1/0x2b0 [ 38.927443] mmap_region+0x1f9/0x2660 [ 38.927920] do_mmap+0x854/0xf00 [ 38.928356] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.928844] ksys_mmap_pgoff+0x3af/0x500 [ 38.929350] do_syscall_64+0x3f/0x90 [ 38.929849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930487] [ 38.930703] The buggy address belongs to the object at ffff88800e3a3d98 [ 38.930703] which belongs to the cache vm_area_struct of size 168 [ 38.932179] The buggy address is located 88 bytes inside of [ 38.932179] freed 168-byte region [ffff88800e3a3d98, ffff88800e3a3e40) [ 38.933586] [ 38.933812] The buggy address belongs to the physical page: [ 38.934466] page:00000000dde4941b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3a3 [ 38.935560] memcg:ffff88800c500b01 [ 38.935988] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.936683] page_type: 0xffffffff() [ 38.937140] raw: 0100000000000200 ffff8880087a0c80 ffffea0000320380 dead000000000005 [ 38.938076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c500b01 [ 38.938991] page dumped because: kasan: bad access detected [ 38.939654] [ 38.939871] Memory state around the buggy address: [ 38.940451] ffff88800e3a3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.941313] ffff88800e3a3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.942178] >ffff88800e3a3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.943027] ^ [ 38.943841] ffff88800e3a3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.944707] ffff88800e3a3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.945563] ================================================================== [ 38.946499] Disabling lock debugging due to kernel taint [ 40.918573] BUG: Bad rss-counter state mm:00000000d95bd3af type:MM_FILEPAGES val:33 [ 40.919726] BUG: Bad rss-counter state mm:00000000d95bd3af type:MM_ANONPAGES val:22 [ 41.383361] BUG: Bad rss-counter state mm:000000009bb4220e type:MM_FILEPAGES val:33 [ 41.384547] BUG: Bad rss-counter state mm:000000009bb4220e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62098' (ECDSA) to the list of known hosts. 2023/06/21 02:33:52 fuzzer started 2023/06/21 02:33:52 dialing manager at localhost:36067 2023/06/21 02:33:52 checking machine... 2023/06/21 02:33:52 checking revisions... [ 42.022554] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:33:52 testing simple program... [ 42.072495] cgroup: Unknown subsys name 'net' [ 42.112786] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008fd6c00 RCX=ffff888008fd6c48 RDX=1ffff11003405f9d RSI=ffffffff844caf3e RDI=ffff88801a02fce8 RBP=0000000000000000 RSP=ffff88801a02fbc0 R8 =0000000000000001 R9 =ffffed10028f2a3b R10=ffff8880147951db R11=0000000000000000 R12=ffff88801a02fcc0 R13=ffff8880147951c0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8140ea89 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 00007fa72f759700 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=00007f0384428a40 CR3=000000000c57c000 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=2031353a33333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf4a77 RBX=ffffffff85fa53b8 RCX=ffffffff8363e063 RDX=0000000000000000 RSI=ffffffff863b3bde RDI=ffffffff85fa53a8 RBP=ffffffff85fa53a8 RSP=ffff88806cf09998 R8 =ffffffff863b3bde R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008aa79 R12=ffffffff85fa53c8 R13=ffffffff85fa53a8 R14=ffffffff85fa53a8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007fc133eb7900 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=00007fc13446e618 CR3=0000000009596000 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