syzkaller login: [ 37.012462] BUG: Bad rss-counter state mm:0000000029d23190 type:MM_FILEPAGES val:33 [ 37.013491] BUG: Bad rss-counter state mm:0000000029d23190 type:MM_ANONPAGES val:22 [ 37.051677] ================================================================== [ 37.052735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.053807] Read of size 8 at addr ffff88800e5e5b38 by task sshd/219 [ 37.054752] [ 37.055017] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.055978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.057035] Call Trace: [ 37.057477] [ 37.057773] dump_stack_lvl+0x91/0xf0 [ 37.058272] print_report+0xcc/0x620 [ 37.058759] ? __virt_addr_valid+0x102/0x340 [ 37.059317] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.059964] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.060714] kasan_report+0xbe/0xf0 [ 37.061268] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.061914] vma_interval_tree_remove+0xc75/0xec0 [ 37.062688] vma_prepare+0xc54/0x11a0 [ 37.063246] __split_vma+0x5af/0x950 [ 37.063750] ? __pfx___split_vma+0x10/0x10 [ 37.064282] ? find_held_lock+0x2c/0x110 [ 37.064808] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.065382] ? lock_is_held_type+0x9f/0x120 [ 37.065928] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.066534] ? mtree_range_walk+0x632/0x900 [ 37.067092] ? mas_walk+0x5c7/0x7c0 [ 37.067565] do_vmi_munmap+0x1f1/0x2b0 [ 37.068079] mmap_region+0x1f9/0x2660 [ 37.068564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.069084] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.069812] ? __pfx_lock_acquire+0x10/0x10 [ 37.070347] ? __pfx_mmap_region+0x10/0x10 [ 37.070899] ? security_mmap_addr+0x7d/0xa0 [ 37.071457] ? get_unmapped_area+0x1f5/0x3f0 [ 37.072105] do_mmap+0x854/0xf00 [ 37.072529] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.073001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.073536] ksys_mmap_pgoff+0x3af/0x500 [ 37.074018] do_syscall_64+0x3f/0x90 [ 37.074473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.075088] RIP: 0033:0x7ffaaa04ad82 [ 37.075528] 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 [ 37.077548] RSP: 002b:00007fffd82ed8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.078403] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffaaa04ad82 [ 37.079200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffaa9484000 [ 37.080020] RBP: 00007ffaa9484000 R08: 0000000000000009 R09: 0000000000001000 [ 37.080863] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557140e4cb20 [ 37.081707] R13: 00007fffd82ed900 R14: 00007fffd82ed930 R15: 00007fffd82edc90 [ 37.082565] [ 37.082858] [ 37.083074] Allocated by task 212: [ 37.083504] kasan_save_stack+0x22/0x50 [ 37.084076] kasan_set_track+0x25/0x30 [ 37.084605] __kasan_slab_alloc+0x59/0x70 [ 37.085131] kmem_cache_alloc+0x16b/0x370 [ 37.085646] vm_area_dup+0x20/0x160 [ 37.086111] __split_vma+0x170/0x950 [ 37.086575] split_vma+0xc6/0x110 [ 37.087018] mprotect_fixup+0x8d2/0xb30 [ 37.087517] do_mprotect_pkey+0x87e/0xd40 [ 37.088050] __x64_sys_mprotect+0x78/0xc0 [ 37.088566] do_syscall_64+0x3f/0x90 [ 37.089034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.089678] [ 37.089898] Freed by task 212: [ 37.090284] kasan_save_stack+0x22/0x50 [ 37.090788] kasan_set_track+0x25/0x30 [ 37.091289] kasan_save_free_info+0x2b/0x50 [ 37.091834] __kasan_slab_free+0x10a/0x190 [ 37.092374] kmem_cache_free+0x10d/0x4d0 [ 37.092891] rcu_core+0x8c8/0x2860 [ 37.093335] __do_softirq+0x1b7/0x7d4 [ 37.093806] [ 37.094024] Last potentially related work creation: [ 37.094620] kasan_save_stack+0x22/0x50 [ 37.095117] __kasan_record_aux_stack+0x8e/0xa0 [ 37.095693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.096427] remove_vma+0x139/0x170 [ 37.096885] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.097438] do_vmi_munmap+0x1f1/0x2b0 [ 37.097930] __vm_munmap+0x138/0x3a0 [ 37.098401] __x64_sys_munmap+0x59/0x80 [ 37.098892] do_syscall_64+0x3f/0x90 [ 37.099364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.100043] [ 37.100258] Second to last potentially related work creation: [ 37.100946] kasan_save_stack+0x22/0x50 [ 37.101449] __kasan_record_aux_stack+0x8e/0xa0 [ 37.102020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.102665] remove_vma+0x139/0x170 [ 37.103116] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.103681] do_vmi_munmap+0x1f1/0x2b0 [ 37.104162] __vm_munmap+0x138/0x3a0 [ 37.104628] __x64_sys_munmap+0x59/0x80 [ 37.105128] do_syscall_64+0x3f/0x90 [ 37.105597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.106237] [ 37.106455] The buggy address belongs to the object at ffff88800e5e5ae0 [ 37.106455] which belongs to the cache vm_area_struct of size 168 [ 37.107967] The buggy address is located 88 bytes inside of [ 37.107967] freed 168-byte region [ffff88800e5e5ae0, ffff88800e5e5b88) [ 37.109381] [ 37.109597] The buggy address belongs to the physical page: [ 37.110260] page:00000000f5c7d10e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5e5 [ 37.111356] memcg:ffff88800eb4f501 [ 37.111787] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.112518] page_type: 0xffffffff() [ 37.112988] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 37.113944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb4f501 [ 37.114894] page dumped because: kasan: bad access detected [ 37.115567] [ 37.115795] Memory state around the buggy address: [ 37.116430] ffff88800e5e5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.117302] ffff88800e5e5a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 37.118167] >ffff88800e5e5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.119032] ^ [ 37.119682] ffff88800e5e5b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 37.120571] ffff88800e5e5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.121430] ================================================================== [ 37.122395] Disabling lock debugging due to kernel taint [ 39.146453] BUG: Bad rss-counter state mm:000000008b0d8f8d type:MM_FILEPAGES val:33 [ 39.147643] BUG: Bad rss-counter state mm:000000008b0d8f8d type:MM_ANONPAGES val:22 [ 39.543143] BUG: Bad rss-counter state mm:000000008c15cf3a type:MM_FILEPAGES val:33 [ 39.544336] BUG: Bad rss-counter state mm:000000008c15cf3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51964' (ECDSA) to the list of known hosts. 2023/06/19 21:24:13 fuzzer started 2023/06/19 21:24:13 dialing manager at localhost:44161 2023/06/19 21:24:13 checking machine... 2023/06/19 21:24:13 checking revisions... [ 40.270581] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:24:13 testing simple program... [ 40.315916] cgroup: Unknown subsys name 'net' [ 40.376905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:24:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888017d475d8 RSP=ffff888017d47510 R8 =ffffffff8613751e R9 =ffff888017d475c0 R10=0000000000038001 R11=0000000000020d8a R12=ffff888017d475e0 R13=ffff888017d475c8 R14=ffff888017d476b8 R15=ffff888017d47580 RIP=ffffffff81130bb0 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 00007f29c1ed1900 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=00007f29c2488618 CR3=000000000dac4000 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=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=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=00007fdc9671f8a0 CR3=000000000c610000 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=8194d17c8e6e31b4fa4ebf83270a2b6c XMM02=ec2efd57dc4c00df000000000011dfa0 XMM03=daa152b89d9d7860000000000011e070 XMM04=8f5d973ab07176f500000000000ae988 XMM05=dfcdbad4f1609c3700000000001354d8 XMM06=609a516d463ddbb40000000000134340 XMM07=e042d86d42eb936e0000000000124b48 XMM08=daa152b89d9d7860000000000011e070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000