syzkaller login: [ 30.364978] BUG: Bad rss-counter state mm:0000000079928570 type:MM_FILEPAGES val:33 [ 30.365904] BUG: Bad rss-counter state mm:0000000079928570 type:MM_ANONPAGES val:22 [ 30.470446] ================================================================== [ 30.471118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.471784] Read of size 8 at addr ffff88800eed0968 by task sshd/220 [ 30.472304] [ 30.472441] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.472994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.473631] Call Trace: [ 30.473835] [ 30.474018] dump_stack_lvl+0x91/0xf0 [ 30.474340] print_report+0xcc/0x620 [ 30.474653] ? __virt_addr_valid+0x102/0x340 [ 30.475145] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.475598] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.475996] kasan_report+0xbe/0xf0 [ 30.476303] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.476702] vma_interval_tree_remove+0xc75/0xec0 [ 30.477085] vma_prepare+0xc54/0x11a0 [ 30.477422] __split_vma+0x5af/0x950 [ 30.477740] ? __pfx___split_vma+0x10/0x10 [ 30.478083] ? find_held_lock+0x2c/0x110 [ 30.478436] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.478801] ? lock_is_held_type+0x9f/0x120 [ 30.479171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.479614] ? mtree_range_walk+0x632/0x900 [ 30.480001] ? mas_walk+0x5c7/0x7c0 [ 30.480320] do_vmi_munmap+0x1f1/0x2b0 [ 30.480639] mmap_region+0x1f9/0x2660 [ 30.480949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.481273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.481733] ? __pfx_lock_acquire+0x10/0x10 [ 30.482074] ? __pfx_mmap_region+0x10/0x10 [ 30.482419] ? security_mmap_addr+0x7d/0xa0 [ 30.482758] ? get_unmapped_area+0x1f5/0x3f0 [ 30.483112] do_mmap+0x854/0xf00 [ 30.483420] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.483736] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.484103] ksys_mmap_pgoff+0x3af/0x500 [ 30.484432] do_syscall_64+0x3f/0x90 [ 30.484746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.485165] RIP: 0033:0x7f64535a9d82 [ 30.485466] 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 [ 30.486879] RSP: 002b:00007fffda5801f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.487535] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64535a9d82 [ 30.488118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64529e3000 [ 30.488642] RBP: 00007f64529e3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.489163] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564cb0eb1ec0 [ 30.489690] R13: 00007fffda580210 R14: 00007fffda580240 R15: 00007fffda5805a0 [ 30.490237] [ 30.490429] [ 30.490572] Allocated by task 213: [ 30.490853] kasan_save_stack+0x22/0x50 [ 30.491186] kasan_set_track+0x25/0x30 [ 30.491561] __kasan_slab_alloc+0x59/0x70 [ 30.491901] kmem_cache_alloc+0x16b/0x370 [ 30.492239] vm_area_dup+0x20/0x160 [ 30.492542] __split_vma+0x170/0x950 [ 30.492848] split_vma+0xc6/0x110 [ 30.493132] mprotect_fixup+0x8d2/0xb30 [ 30.493461] do_mprotect_pkey+0x87e/0xd40 [ 30.493796] __x64_sys_mprotect+0x78/0xc0 [ 30.494130] do_syscall_64+0x3f/0x90 [ 30.494446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.494863] [ 30.495005] Freed by task 213: [ 30.495257] kasan_save_stack+0x22/0x50 [ 30.495606] kasan_set_track+0x25/0x30 [ 30.495929] kasan_save_free_info+0x2b/0x50 [ 30.496269] __kasan_slab_free+0x10a/0x190 [ 30.496613] kmem_cache_free+0x10d/0x4d0 [ 30.496940] rcu_core+0x8c8/0x2860 [ 30.497230] __do_softirq+0x1b7/0x7d4 [ 30.497540] [ 30.497679] Last potentially related work creation: [ 30.498059] kasan_save_stack+0x22/0x50 [ 30.498383] __kasan_record_aux_stack+0x8e/0xa0 [ 30.498748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.499163] remove_vma+0x139/0x170 [ 30.499478] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.499833] do_vmi_munmap+0x1f1/0x2b0 [ 30.500146] __vm_munmap+0x138/0x3a0 [ 30.500454] __x64_sys_munmap+0x59/0x80 [ 30.500781] do_syscall_64+0x3f/0x90 [ 30.501090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.501502] [ 30.501638] The buggy address belongs to the object at ffff88800eed0910 [ 30.501638] which belongs to the cache vm_area_struct of size 168 [ 30.502587] The buggy address is located 88 bytes inside of [ 30.502587] freed 168-byte region [ffff88800eed0910, ffff88800eed09b8) [ 30.503561] [ 30.503707] The buggy address belongs to the physical page: [ 30.504146] page:000000005bf33fec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeed0 [ 30.504862] memcg:ffff88800eb50d01 [ 30.505150] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.505564] page_type: 0xffffffff() [ 30.505864] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.506461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb50d01 [ 30.507042] page dumped because: kasan: bad access detected [ 30.507472] [ 30.507603] Memory state around the buggy address: [ 30.507974] ffff88800eed0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.508503] ffff88800eed0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.509030] >ffff88800eed0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.509589] ^ [ 30.510146] ffff88800eed0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.510739] ffff88800eed0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.511345] ================================================================== [ 30.512029] Disabling lock debugging due to kernel taint [ 32.342698] BUG: Bad rss-counter state mm:000000005ee9c431 type:MM_FILEPAGES val:33 [ 32.343435] BUG: Bad rss-counter state mm:000000005ee9c431 type:MM_ANONPAGES val:22 [ 32.730773] BUG: Bad rss-counter state mm:00000000c29a6d78 type:MM_FILEPAGES val:33 [ 32.731477] BUG: Bad rss-counter state mm:00000000c29a6d78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40264' (ECDSA) to the list of known hosts. 2023/06/21 08:41:52 fuzzer started 2023/06/21 08:41:52 dialing manager at localhost:36067 2023/06/21 08:41:52 checking machine... 2023/06/21 08:41:52 checking revisions... [ 33.274316] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:41:52 testing simple program... [ 33.307399] cgroup: Unknown subsys name 'net' [ 33.345434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:41:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe85745f58 CR3=0000000005482000 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=00007f65c232051000005652e2ae8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff87f97640 RCX=ffffffff83c6098c RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f982c8 RBP=0000000000000000 RSP=ffff88800ee8f6a8 R8 =0000000000000000 R9 =fffffbfff0ff3059 R10=ffffffff87f982cb R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000100 R14=0000000000000004 R15=ffff88800f606000 RIP=ffffffff83c609bd 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 00007f7b2c481900 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=00007f7b2ca38618 CR3=0000000009578000 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