syzkaller login: [ 38.358734] BUG: Bad rss-counter state mm:000000003082f9e6 type:MM_FILEPAGES val:33 [ 38.360014] BUG: Bad rss-counter state mm:000000003082f9e6 type:MM_ANONPAGES val:22 [ 38.425558] ================================================================== [ 38.426542] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.427656] Read of size 8 at addr ffff88801461edf0 by task sshd/221 [ 38.428467] [ 38.428695] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.429598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.430612] Call Trace: [ 38.430938] [ 38.431235] dump_stack_lvl+0x91/0xf0 [ 38.431751] print_report+0xcc/0x620 [ 38.432255] ? __virt_addr_valid+0x102/0x340 [ 38.432827] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.433464] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.434113] kasan_report+0xbe/0xf0 [ 38.434605] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.435249] vma_interval_tree_remove+0xc75/0xec0 [ 38.435889] vma_prepare+0xc54/0x11a0 [ 38.436378] __split_vma+0x5af/0x950 [ 38.436863] ? __pfx___split_vma+0x10/0x10 [ 38.437411] ? find_held_lock+0x2c/0x110 [ 38.437939] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.438518] ? lock_is_held_type+0x9f/0x120 [ 38.439072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.439704] ? mtree_range_walk+0x632/0x900 [ 38.440262] ? mas_walk+0x5c7/0x7c0 [ 38.440740] do_vmi_munmap+0x1f1/0x2b0 [ 38.441241] mmap_region+0x1f9/0x2660 [ 38.441727] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.442244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.442963] ? __pfx_lock_acquire+0x10/0x10 [ 38.443512] ? __pfx_mmap_region+0x10/0x10 [ 38.444067] ? security_mmap_addr+0x7d/0xa0 [ 38.444602] ? get_unmapped_area+0x1f5/0x3f0 [ 38.445152] do_mmap+0x854/0xf00 [ 38.445600] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.446095] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.446659] ksys_mmap_pgoff+0x3af/0x500 [ 38.447171] do_syscall_64+0x3f/0x90 [ 38.447668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.448320] RIP: 0033:0x7fdda734ed82 [ 38.448787] 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 [ 38.450913] RSP: 002b:00007ffe589d49e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.451843] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdda734ed82 [ 38.452706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdda6788000 [ 38.453558] RBP: 00007fdda6788000 R08: 0000000000000009 R09: 0000000000001000 [ 38.454411] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d59a3a2f70 [ 38.455270] R13: 00007ffe589d4a00 R14: 00007ffe589d4a30 R15: 00007ffe589d4d90 [ 38.456142] [ 38.456436] [ 38.456651] Allocated by task 213: [ 38.457092] kasan_save_stack+0x22/0x50 [ 38.457605] kasan_set_track+0x25/0x30 [ 38.458104] __kasan_slab_alloc+0x59/0x70 [ 38.458645] kmem_cache_alloc+0x16b/0x370 [ 38.459173] vm_area_dup+0x20/0x160 [ 38.459639] __split_vma+0x170/0x950 [ 38.460111] split_vma+0xc6/0x110 [ 38.460557] mprotect_fixup+0x8d2/0xb30 [ 38.461064] do_mprotect_pkey+0x87e/0xd40 [ 38.461593] __x64_sys_mprotect+0x78/0xc0 [ 38.462126] do_syscall_64+0x3f/0x90 [ 38.462610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.463259] [ 38.463475] Freed by task 213: [ 38.463893] kasan_save_stack+0x22/0x50 [ 38.464404] kasan_set_track+0x25/0x30 [ 38.464912] kasan_save_free_info+0x2b/0x50 [ 38.465449] __kasan_slab_free+0x10a/0x190 [ 38.465987] kmem_cache_free+0x10d/0x4d0 [ 38.466504] rcu_core+0x8c8/0x2860 [ 38.466956] __do_softirq+0x1b7/0x7d4 [ 38.467440] [ 38.467667] Last potentially related work creation: [ 38.468261] kasan_save_stack+0x22/0x50 [ 38.468773] __kasan_record_aux_stack+0x8e/0xa0 [ 38.469415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.470068] remove_vma+0x139/0x170 [ 38.470530] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.471094] do_vmi_munmap+0x1f1/0x2b0 [ 38.471592] __vm_munmap+0x138/0x3a0 [ 38.472090] __x64_sys_munmap+0x59/0x80 [ 38.472606] do_syscall_64+0x3f/0x90 [ 38.473108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.473784] [ 38.474008] The buggy address belongs to the object at ffff88801461ed98 [ 38.474008] which belongs to the cache vm_area_struct of size 168 [ 38.475551] The buggy address is located 88 bytes inside of [ 38.475551] freed 168-byte region [ffff88801461ed98, ffff88801461ee40) [ 38.477022] [ 38.477242] The buggy address belongs to the physical page: [ 38.477931] page:00000000a86d985e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1461e [ 38.479031] memcg:ffff88800deede01 [ 38.479467] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.480153] page_type: 0xffffffff() [ 38.480636] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.481591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deede01 [ 38.482542] page dumped because: kasan: bad access detected [ 38.483203] [ 38.483419] Memory state around the buggy address: [ 38.484013] ffff88801461ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.484894] ffff88801461ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.485772] >ffff88801461ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.486639] ^ [ 38.487470] ffff88801461ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.488344] ffff88801461ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.489234] ================================================================== [ 38.490185] Disabling lock debugging due to kernel taint [ 40.613035] BUG: Bad rss-counter state mm:000000000624366f type:MM_FILEPAGES val:33 [ 40.614195] BUG: Bad rss-counter state mm:000000000624366f type:MM_ANONPAGES val:22 [ 41.007184] BUG: Bad rss-counter state mm:000000004dda6f1f type:MM_FILEPAGES val:33 [ 41.008359] BUG: Bad rss-counter state mm:000000004dda6f1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51620' (ECDSA) to the list of known hosts. 2023/06/19 13:28:10 fuzzer started 2023/06/19 13:28:11 dialing manager at localhost:44161 2023/06/19 13:28:11 checking machine... 2023/06/19 13:28:11 checking revisions... [ 41.735234] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:28:11 testing simple program... [ 41.787811] cgroup: Unknown subsys name 'net' [ 41.843568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:28:03 Registers: info registers vcpu 0 RAX=ffff88800e2c6b18 RBX=ffff88800f79b198 RCX=1ffff11002d98014 RDX=dffffc0000000000 RSI=ffff888015a2a000 RDI=ffff88800f79b1c8 RBP=ffff88800f79b1a8 RSP=ffff8880168df638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888015a28000 R13=0000000000000000 R14=ffff8880169b0638 R15=ffff8880169b05f0 RIP=ffffffff8184754c RFL=00000046 [---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 00007fe8b49d0900 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=00007fe8b4f87618 CR3=00000000096aa000 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=dffffc0000000000 RBX=ffff88806cf39500 RCX=ffffffff812d869a RDX=1ffff1100d9e73dc RSI=0000000000000008 RDI=ffff88806cf39ee0 RBP=ffff88806cf09dc8 RSP=ffff88806cf09d88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806cf09ff8 R12=ffff88806cf39500 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888008d751c0 RIP=ffffffff8124f745 RFL=00000046 [---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=00007fc1fce23110 CR3=000000000c9a2000 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=2030313a38323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38323a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000