syzkaller login: [ 29.041262] BUG: Bad rss-counter state mm:000000009977d1de type:MM_FILEPAGES val:33 [ 29.042540] BUG: Bad rss-counter state mm:000000009977d1de type:MM_ANONPAGES val:22 [ 29.071854] ================================================================== [ 29.072552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.073273] Read of size 8 at addr ffff88800959d5c8 by task sshd/219 [ 29.073849] [ 29.074015] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.074688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.075450] Call Trace: [ 29.075691] [ 29.075907] dump_stack_lvl+0x91/0xf0 [ 29.076289] print_report+0xcc/0x620 [ 29.076660] ? __virt_addr_valid+0x102/0x340 [ 29.077079] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.077551] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.078014] kasan_report+0xbe/0xf0 [ 29.078397] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.078873] vma_interval_tree_remove+0xc75/0xec0 [ 29.079354] vma_prepare+0xc54/0x11a0 [ 29.079717] __split_vma+0x5af/0x950 [ 29.080074] ? __pfx___split_vma+0x10/0x10 [ 29.080473] ? find_held_lock+0x2c/0x110 [ 29.080868] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.081297] ? lock_is_held_type+0x9f/0x120 [ 29.081708] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.082191] ? mtree_range_walk+0x632/0x900 [ 29.082623] ? mas_walk+0x5c7/0x7c0 [ 29.082982] do_vmi_munmap+0x1f1/0x2b0 [ 29.083388] mmap_region+0x1f9/0x2660 [ 29.083753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.084140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.084795] ? __pfx_lock_acquire+0x10/0x10 [ 29.085202] ? __pfx_mmap_region+0x10/0x10 [ 29.085606] ? security_mmap_addr+0x7d/0xa0 [ 29.086019] ? get_unmapped_area+0x1f5/0x3f0 [ 29.086463] do_mmap+0x854/0xf00 [ 29.086799] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.087176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.087627] ksys_mmap_pgoff+0x3af/0x500 [ 29.088007] do_syscall_64+0x3f/0x90 [ 29.088367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.088851] RIP: 0033:0x7fe54ca5cd82 [ 29.089204] 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 [ 29.090842] RSP: 002b:00007fff7e7889a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.091543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe54ca5cd82 [ 29.092183] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe54be96000 [ 29.092828] RBP: 00007fe54be96000 R08: 0000000000000009 R09: 0000000000001000 [ 29.093463] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562da0e2bec0 [ 29.094116] R13: 00007fff7e7889c0 R14: 00007fff7e7889f0 R15: 00007fff7e788d50 [ 29.094772] [ 29.094996] [ 29.095174] Allocated by task 212: [ 29.095515] kasan_save_stack+0x22/0x50 [ 29.095896] kasan_set_track+0x25/0x30 [ 29.096268] __kasan_slab_alloc+0x59/0x70 [ 29.096664] kmem_cache_alloc+0x16b/0x370 [ 29.097052] vm_area_dup+0x20/0x160 [ 29.097429] __split_vma+0x170/0x950 [ 29.097784] split_vma+0xc6/0x110 [ 29.098111] mprotect_fixup+0x8d2/0xb30 [ 29.098489] do_mprotect_pkey+0x87e/0xd40 [ 29.098878] __x64_sys_mprotect+0x78/0xc0 [ 29.099313] do_syscall_64+0x3f/0x90 [ 29.099675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.100159] [ 29.100320] Freed by task 13: [ 29.100604] kasan_save_stack+0x22/0x50 [ 29.100985] kasan_set_track+0x25/0x30 [ 29.101355] kasan_save_free_info+0x2b/0x50 [ 29.101759] __kasan_slab_free+0x10a/0x190 [ 29.102161] kmem_cache_free+0x10d/0x4d0 [ 29.102537] rcu_core+0x8c8/0x2860 [ 29.102870] __do_softirq+0x1b7/0x7d4 [ 29.103278] [ 29.103444] Last potentially related work creation: [ 29.103901] kasan_save_stack+0x22/0x50 [ 29.104282] __kasan_record_aux_stack+0x8e/0xa0 [ 29.104710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.105196] remove_vma+0x139/0x170 [ 29.105542] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.105967] do_vmi_munmap+0x1f1/0x2b0 [ 29.106327] __vm_munmap+0x138/0x3a0 [ 29.106675] __x64_sys_munmap+0x59/0x80 [ 29.107049] do_syscall_64+0x3f/0x90 [ 29.107442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.107925] [ 29.108089] The buggy address belongs to the object at ffff88800959d570 [ 29.108089] which belongs to the cache vm_area_struct of size 168 [ 29.109186] The buggy address is located 88 bytes inside of [ 29.109186] freed 168-byte region [ffff88800959d570, ffff88800959d618) [ 29.110248] [ 29.110409] The buggy address belongs to the physical page: [ 29.110901] page:00000000a845bfe0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x959d [ 29.111766] memcg:ffff8880164e7d01 [ 29.112086] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.112571] page_type: 0xffffffff() [ 29.112910] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.113610] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164e7d01 [ 29.114305] page dumped because: kasan: bad access detected [ 29.114800] [ 29.114961] Memory state around the buggy address: [ 29.115459] ffff88800959d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.116104] ffff88800959d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.116753] >ffff88800959d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.117397] ^ [ 29.117892] ffff88800959d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.118539] ffff88800959d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.119210] ================================================================== [ 29.120045] Disabling lock debugging due to kernel taint [ 30.722954] BUG: Bad rss-counter state mm:00000000a971daf3 type:MM_FILEPAGES val:33 [ 30.723953] BUG: Bad rss-counter state mm:00000000a971daf3 type:MM_ANONPAGES val:22 [ 31.213962] BUG: Bad rss-counter state mm:000000002d494cad type:MM_FILEPAGES val:33 [ 31.215175] BUG: Bad rss-counter state mm:000000002d494cad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20494' (ECDSA) to the list of known hosts. 2023/06/21 04:54:53 fuzzer started 2023/06/21 04:54:53 dialing manager at localhost:36067 2023/06/21 04:54:53 checking machine... 2023/06/21 04:54:53 checking revisions... [ 31.928454] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:54:53 testing simple program... [ 31.983320] cgroup: Unknown subsys name 'net' [ 32.021436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:54:53 Registers: info registers vcpu 0 RAX=ffffffff85d3d350 RBX=1ffff110031bfefb RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888018dff7b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f036 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 00007f2b21ddb900 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=00007f2b22392618 CR3=0000000010170000 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=0000000000000007 RBX=ffffffff85dba0fc RCX=ffffffff813782f7 RDX=0000000000000000 RSI=ffffffff860d2fd0 RDI=ffffffff85dba0f4 RBP=ffffffff85dba0fc RSP=ffff88806cf099e0 R8 =ffffffff860d2fd0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffffffff85dba0fc R13=ffffffff85dba0f4 R14=ffffffff85dba0f8 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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=00007f5f49cf8700 CR3=000000000ffc8000 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=0804f9930110c6a97c4839964b108b08 XMM02=000000000011b3d0ec2efd57dc4c00df XMM03=0000000000122038ad7fc5c253e22a93 XMM04=79e08932756d5f5900000000000ae988 XMM05=52550895393e81cb0000000000132cc0 XMM06=806171799158d9670000000000131d60 XMM07=e042d86d42eb936e00000000001222b8 XMM08=ad7fc5c253e22a93000000000011b430 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000