syzkaller login: [ 30.658811] BUG: Bad rss-counter state mm:000000006ee2541e type:MM_FILEPAGES val:33 [ 30.660019] BUG: Bad rss-counter state mm:000000006ee2541e type:MM_ANONPAGES val:22 [ 30.700378] ================================================================== [ 30.701317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.702376] Read of size 8 at addr ffff88800f1d9310 by task sshd/221 [ 30.703279] [ 30.703582] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.704542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.705708] Call Trace: [ 30.706046] [ 30.706396] dump_stack_lvl+0x91/0xf0 [ 30.706978] print_report+0xcc/0x620 [ 30.707537] ? __virt_addr_valid+0x102/0x340 [ 30.708127] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708797] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709435] kasan_report+0xbe/0xf0 [ 30.710016] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710645] vma_interval_tree_remove+0xc75/0xec0 [ 30.711254] vma_prepare+0xc54/0x11a0 [ 30.711734] __split_vma+0x5af/0x950 [ 30.712208] ? __pfx___split_vma+0x10/0x10 [ 30.712843] ? find_held_lock+0x2c/0x110 [ 30.713404] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.713969] ? lock_is_held_type+0x9f/0x120 [ 30.714641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.715384] ? mtree_range_walk+0x632/0x900 [ 30.715941] ? mas_walk+0x5c7/0x7c0 [ 30.716498] do_vmi_munmap+0x1f1/0x2b0 [ 30.717066] mmap_region+0x1f9/0x2660 [ 30.717610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.718214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.718936] ? __pfx_lock_acquire+0x10/0x10 [ 30.719468] ? __pfx_mmap_region+0x10/0x10 [ 30.720004] ? security_mmap_addr+0x7d/0xa0 [ 30.720536] ? get_unmapped_area+0x1f5/0x3f0 [ 30.721086] do_mmap+0x854/0xf00 [ 30.721534] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.722030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.722611] ksys_mmap_pgoff+0x3af/0x500 [ 30.723127] do_syscall_64+0x3f/0x90 [ 30.723607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724254] RIP: 0033:0x7fad431cad82 [ 30.724712] 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 [ 30.727314] RSP: 002b:00007fffdc9bedf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.728228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad431cad82 [ 30.729029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad42604000 [ 30.729838] RBP: 00007fad42604000 R08: 0000000000000009 R09: 0000000000001000 [ 30.730668] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f386671f70 [ 30.731469] R13: 00007fffdc9bee10 R14: 00007fffdc9bee40 R15: 00007fffdc9bf1a0 [ 30.732275] [ 30.732551] [ 30.732756] Allocated by task 214: [ 30.733167] kasan_save_stack+0x22/0x50 [ 30.733689] kasan_set_track+0x25/0x30 [ 30.734260] __kasan_slab_alloc+0x59/0x70 [ 30.734872] kmem_cache_alloc+0x16b/0x370 [ 30.735445] vm_area_dup+0x20/0x160 [ 30.735974] __split_vma+0x170/0x950 [ 30.736534] split_vma+0xc6/0x110 [ 30.737016] mprotect_fixup+0x8d2/0xb30 [ 30.737513] do_mprotect_pkey+0x87e/0xd40 [ 30.738033] __x64_sys_mprotect+0x78/0xc0 [ 30.738547] do_syscall_64+0x3f/0x90 [ 30.739055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739691] [ 30.739911] Freed by task 13: [ 30.740300] kasan_save_stack+0x22/0x50 [ 30.740801] kasan_set_track+0x25/0x30 [ 30.741297] kasan_save_free_info+0x2b/0x50 [ 30.741831] __kasan_slab_free+0x10a/0x190 [ 30.742370] kmem_cache_free+0x10d/0x4d0 [ 30.742901] rcu_core+0x8c8/0x2860 [ 30.743354] __do_softirq+0x1b7/0x7d4 [ 30.743832] [ 30.744051] Last potentially related work creation: [ 30.744674] kasan_save_stack+0x22/0x50 [ 30.745186] __kasan_record_aux_stack+0x8e/0xa0 [ 30.745756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.746403] remove_vma+0x139/0x170 [ 30.746870] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.747418] do_vmi_munmap+0x1f1/0x2b0 [ 30.747904] __vm_munmap+0x138/0x3a0 [ 30.748383] __x64_sys_munmap+0x59/0x80 [ 30.748891] do_syscall_64+0x3f/0x90 [ 30.749361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.749998] [ 30.750213] The buggy address belongs to the object at ffff88800f1d92b8 [ 30.750213] which belongs to the cache vm_area_struct of size 168 [ 30.751694] The buggy address is located 88 bytes inside of [ 30.751694] freed 168-byte region [ffff88800f1d92b8, ffff88800f1d9360) [ 30.753089] [ 30.753307] The buggy address belongs to the physical page: [ 30.753971] page:000000003ba6a07c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1d9 [ 30.755071] memcg:ffff888019c3fa01 [ 30.755494] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.756143] page_type: 0xffffffff() [ 30.756601] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.757529] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c3fa01 [ 30.758436] page dumped because: kasan: bad access detected [ 30.759126] [ 30.759342] Memory state around the buggy address: [ 30.759924] ffff88800f1d9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.760791] ffff88800f1d9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.761654] >ffff88800f1d9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.762500] ^ [ 30.762984] ffff88800f1d9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.763851] ffff88800f1d9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.764706] ================================================================== [ 30.765623] Disabling lock debugging due to kernel taint [ 32.715236] BUG: Bad rss-counter state mm:000000004363b281 type:MM_FILEPAGES val:33 [ 32.716272] BUG: Bad rss-counter state mm:000000004363b281 type:MM_ANONPAGES val:22 [ 33.259677] BUG: Bad rss-counter state mm:00000000f39b245a type:MM_FILEPAGES val:33 [ 33.260916] BUG: Bad rss-counter state mm:00000000f39b245a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53949' (ECDSA) to the list of known hosts. 2023/06/20 19:23:57 fuzzer started 2023/06/20 19:23:57 dialing manager at localhost:36067 2023/06/20 19:23:57 checking machine... 2023/06/20 19:23:57 checking revisions... [ 33.875937] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:23:58 testing simple program... [ 33.922395] cgroup: Unknown subsys name 'net' [ 33.967500] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:23:57 Registers: info registers vcpu 0 RAX=00000000000000a4 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801a129b40 RSI=ffffffff83635ab0 RDI=0000000000000005 RBP=ffff888015f6fe60 RSP=ffff888015f6fb48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000096700000967 R12=00000000000000a4 R13=0000000000000000 R14=0000000000000000 R15=ffff888015f6fea4 RIP=ffffffff814c0860 RFL=00000293 [--S-A-C] 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 00007fd8970e4900 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=00007fd89769b618 CR3=000000000e44e000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fc794006458 CR3=000000000eedc000 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=bf83da5df95d248c174871038b166929 XMM02=2c67c8bc2e329bc3000000000011a5c8 XMM03=fb795ef6d65770560000000000121aa0 XMM04=e591d3e9932333f100000000000ae988 XMM05=5a9d233068761c4a0000000000131a50 XMM06=db20f175d54767f000000000001318d8 XMM07=e042d86d42eb936e0000000000121d20 XMM08=dafd05991f43d117000000000011a628 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000