syzkaller login: [ 37.858858] BUG: Bad rss-counter state mm:00000000e881f1eb type:MM_FILEPAGES val:33 [ 37.859880] BUG: Bad rss-counter state mm:00000000e881f1eb type:MM_ANONPAGES val:22 [ 38.022054] ================================================================== [ 38.022971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.023925] Read of size 8 at addr ffff88800e32bc20 by task sshd/221 [ 38.024707] [ 38.024927] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.025940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.026919] Call Trace: [ 38.027247] [ 38.027555] dump_stack_lvl+0x91/0xf0 [ 38.028071] print_report+0xcc/0x620 [ 38.028564] ? __virt_addr_valid+0x102/0x340 [ 38.029114] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.029740] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.030362] kasan_report+0xbe/0xf0 [ 38.030840] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.031462] vma_interval_tree_remove+0xc75/0xec0 [ 38.032080] vma_prepare+0xc54/0x11a0 [ 38.032565] __split_vma+0x5af/0x950 [ 38.033045] ? __pfx___split_vma+0x10/0x10 [ 38.033582] ? find_held_lock+0x2c/0x110 [ 38.034107] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.034680] ? lock_is_held_type+0x9f/0x120 [ 38.035217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.035834] ? mtree_range_walk+0x632/0x900 [ 38.036392] ? mas_walk+0x5c7/0x7c0 [ 38.036867] do_vmi_munmap+0x1f1/0x2b0 [ 38.037369] mmap_region+0x1f9/0x2660 [ 38.037853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.038373] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.039083] ? __pfx_lock_acquire+0x10/0x10 [ 38.039645] ? __pfx_mmap_region+0x10/0x10 [ 38.040177] ? security_mmap_addr+0x7d/0xa0 [ 38.040708] ? get_unmapped_area+0x1f5/0x3f0 [ 38.041265] do_mmap+0x854/0xf00 [ 38.041702] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.042204] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.042768] ksys_mmap_pgoff+0x3af/0x500 [ 38.043275] do_syscall_64+0x3f/0x90 [ 38.043770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.044420] RIP: 0033:0x7fbaa32c8d82 [ 38.044876] 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 [ 38.047023] RSP: 002b:00007ffd2a1d7948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.047936] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbaa32c8d82 [ 38.048787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbaa2702000 [ 38.049645] RBP: 00007fbaa2702000 R08: 0000000000000009 R09: 0000000000001000 [ 38.050498] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562eff098f70 [ 38.051345] R13: 00007ffd2a1d7960 R14: 00007ffd2a1d7990 R15: 00007ffd2a1d7cf0 [ 38.052220] [ 38.052517] [ 38.052733] Allocated by task 214: [ 38.053162] kasan_save_stack+0x22/0x50 [ 38.053681] kasan_set_track+0x25/0x30 [ 38.054181] __kasan_slab_alloc+0x59/0x70 [ 38.054706] kmem_cache_alloc+0x16b/0x370 [ 38.055222] vm_area_dup+0x20/0x160 [ 38.055684] __split_vma+0x170/0x950 [ 38.056158] split_vma+0xc6/0x110 [ 38.056599] mprotect_fixup+0x8d2/0xb30 [ 38.057102] do_mprotect_pkey+0x87e/0xd40 [ 38.057621] __x64_sys_mprotect+0x78/0xc0 [ 38.058143] do_syscall_64+0x3f/0x90 [ 38.058630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.059271] [ 38.059486] Freed by task 211: [ 38.059895] kasan_save_stack+0x22/0x50 [ 38.060397] kasan_set_track+0x25/0x30 [ 38.060894] kasan_save_free_info+0x2b/0x50 [ 38.061431] __kasan_slab_free+0x10a/0x190 [ 38.061974] kmem_cache_free+0x10d/0x4d0 [ 38.062491] rcu_core+0x8c8/0x2860 [ 38.062935] __do_softirq+0x1b7/0x7d4 [ 38.063410] [ 38.063641] Last potentially related work creation: [ 38.064235] kasan_save_stack+0x22/0x50 [ 38.064736] __kasan_record_aux_stack+0x8e/0xa0 [ 38.065309] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.065957] remove_vma+0x139/0x170 [ 38.066415] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.067064] do_vmi_munmap+0x1f1/0x2b0 [ 38.067565] __vm_munmap+0x138/0x3a0 [ 38.068033] __x64_sys_munmap+0x59/0x80 [ 38.068533] do_syscall_64+0x3f/0x90 [ 38.069004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.069646] [ 38.069862] The buggy address belongs to the object at ffff88800e32bbc8 [ 38.069862] which belongs to the cache vm_area_struct of size 168 [ 38.071339] The buggy address is located 88 bytes inside of [ 38.071339] freed 168-byte region [ffff88800e32bbc8, ffff88800e32bc70) [ 38.072765] [ 38.072987] The buggy address belongs to the physical page: [ 38.073650] page:00000000ec8c6a76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe32b [ 38.074735] memcg:ffff88800e069701 [ 38.075169] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.075840] page_type: 0xffffffff() [ 38.076296] raw: 0100000000000200 ffff88800879fc80 ffffea0000571880 dead000000000002 [ 38.077217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e069701 [ 38.078116] page dumped because: kasan: bad access detected [ 38.078776] [ 38.078992] Memory state around the buggy address: [ 38.079581] ffff88800e32bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.080438] ffff88800e32bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.081300] >ffff88800e32bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.082162] ^ [ 38.082689] ffff88800e32bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.083562] ffff88800e32bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.084408] ================================================================== [ 38.085423] Disabling lock debugging due to kernel taint [ 40.629369] BUG: Bad rss-counter state mm:0000000085317dfe type:MM_FILEPAGES val:33 [ 40.630470] BUG: Bad rss-counter state mm:0000000085317dfe type:MM_ANONPAGES val:22 [ 41.146060] BUG: Bad rss-counter state mm:00000000d11312fd type:MM_FILEPAGES val:33 [ 41.147711] BUG: Bad rss-counter state mm:00000000d11312fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17464' (ECDSA) to the list of known hosts. 2023/06/19 18:55:42 fuzzer started 2023/06/19 18:55:42 dialing manager at localhost:44161 2023/06/19 18:55:42 checking machine... 2023/06/19 18:55:42 checking revisions... [ 41.910546] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:55:42 testing simple program... [ 41.961904] cgroup: Unknown subsys name 'net' [ 42.011564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000560a4470f460 RSI=00007fff1e72edb8 RDI=0000560a4470f480 RBP=00007fff1e72edf0 RSP=00007fff1e72e898 R8 =00000000ffffffff R9 =0000000000000003 R10=0000560a4470f460 R11=0000000000000000 R12=00007fff1e72ee10 R13=00007f918c5c9b58 R14=00007fff1e72ef90 R15=0000000000000073 RIP=00007f918bfccb3f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f918ba79900 00000000 00000000 GS =0000 0000000000000000 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=00007f9cbec54000 CR3=000000000c9bc000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=2f0bd1e2c0e4eb00322e322e302e3031 XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=20227325223d746363612073253d706f 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=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=00007f918c030618 CR3=000000000c9bc000 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=563412feff00545000000000000080fe 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