syzkaller login: [ 33.561710] BUG: Bad rss-counter state mm:00000000caf1ed94 type:MM_FILEPAGES val:33 [ 33.562710] BUG: Bad rss-counter state mm:00000000caf1ed94 type:MM_ANONPAGES val:22 [ 33.677299] ================================================================== [ 33.677960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.678621] Read of size 8 at addr ffff888014727058 by task sshd/221 [ 33.679160] [ 33.679331] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.679944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.680645] Call Trace: [ 33.680873] [ 33.681076] dump_stack_lvl+0x91/0xf0 [ 33.681419] print_report+0xcc/0x620 [ 33.681902] ? __virt_addr_valid+0x102/0x340 [ 33.682293] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.682743] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.683188] kasan_report+0xbe/0xf0 [ 33.683529] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.683997] vma_interval_tree_remove+0xc75/0xec0 [ 33.684439] vma_prepare+0xc54/0x11a0 [ 33.684770] __split_vma+0x5af/0x950 [ 33.685096] ? __pfx___split_vma+0x10/0x10 [ 33.685479] ? find_held_lock+0x2c/0x110 [ 33.685849] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.686241] ? lock_is_held_type+0x9f/0x120 [ 33.686626] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.687052] ? mtree_range_walk+0x632/0x900 [ 33.687443] ? mas_walk+0x5c7/0x7c0 [ 33.687781] do_vmi_munmap+0x1f1/0x2b0 [ 33.688153] mmap_region+0x1f9/0x2660 [ 33.688500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.688863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.689372] ? __pfx_lock_acquire+0x10/0x10 [ 33.689744] ? __pfx_mmap_region+0x10/0x10 [ 33.690114] ? security_mmap_addr+0x7d/0xa0 [ 33.690487] ? get_unmapped_area+0x1f5/0x3f0 [ 33.690877] do_mmap+0x854/0xf00 [ 33.691187] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.691545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.691947] ksys_mmap_pgoff+0x3af/0x500 [ 33.692318] do_syscall_64+0x3f/0x90 [ 33.692660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.693112] RIP: 0033:0x7f354a573d82 [ 33.693434] 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 [ 33.694920] RSP: 002b:00007ffff32aff48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.695602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f354a573d82 [ 33.696234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35499ad000 [ 33.696833] RBP: 00007f35499ad000 R08: 0000000000000009 R09: 0000000000001000 [ 33.697426] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609d9d66ec0 [ 33.698032] R13: 00007ffff32aff60 R14: 00007ffff32aff90 R15: 00007ffff32b02f0 [ 33.698656] [ 33.698860] [ 33.699011] Allocated by task 214: [ 33.699323] kasan_save_stack+0x22/0x50 [ 33.699712] kasan_set_track+0x25/0x30 [ 33.700070] __kasan_slab_alloc+0x59/0x70 [ 33.700438] kmem_cache_alloc+0x16b/0x370 [ 33.700800] vm_area_dup+0x20/0x160 [ 33.701120] __split_vma+0x170/0x950 [ 33.701451] split_vma+0xc6/0x110 [ 33.701763] mprotect_fixup+0x8d2/0xb30 [ 33.702123] do_mprotect_pkey+0x87e/0xd40 [ 33.702494] __x64_sys_mprotect+0x78/0xc0 [ 33.702869] do_syscall_64+0x3f/0x90 [ 33.703201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.703665] [ 33.703819] Freed by task 214: [ 33.704125] kasan_save_stack+0x22/0x50 [ 33.704525] kasan_set_track+0x25/0x30 [ 33.704880] kasan_save_free_info+0x2b/0x50 [ 33.705253] __kasan_slab_free+0x10a/0x190 [ 33.705680] kmem_cache_free+0x10d/0x4d0 [ 33.706048] rcu_core+0x8c8/0x2860 [ 33.706363] __do_softirq+0x1b7/0x7d4 [ 33.706707] [ 33.706860] Last potentially related work creation: [ 33.707277] kasan_save_stack+0x22/0x50 [ 33.707633] __kasan_record_aux_stack+0x8e/0xa0 [ 33.708060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.708514] remove_vma+0x139/0x170 [ 33.708844] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.709235] do_vmi_munmap+0x1f1/0x2b0 [ 33.709583] __vm_munmap+0x138/0x3a0 [ 33.709920] __x64_sys_munmap+0x59/0x80 [ 33.710271] do_syscall_64+0x3f/0x90 [ 33.710619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.711126] [ 33.711284] The buggy address belongs to the object at ffff888014727000 [ 33.711284] which belongs to the cache vm_area_struct of size 168 [ 33.712380] The buggy address is located 88 bytes inside of [ 33.712380] freed 168-byte region [ffff888014727000, ffff8880147270a8) [ 33.713386] [ 33.713541] The buggy address belongs to the physical page: [ 33.714007] page:00000000f2bc52ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14727 [ 33.714791] memcg:ffff888016a80201 [ 33.715100] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.715570] page_type: 0xffffffff() [ 33.715892] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.716575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a80201 [ 33.717220] page dumped because: kasan: bad access detected [ 33.717694] [ 33.717846] Memory state around the buggy address: [ 33.718259] ffff888014726f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.718874] ffff888014726f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.719476] >ffff888014727000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.720127] ^ [ 33.720655] ffff888014727080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.721265] ffff888014727100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.721874] ================================================================== [ 33.722555] Disabling lock debugging due to kernel taint [ 35.296616] BUG: Bad rss-counter state mm:00000000ceb98f8a type:MM_FILEPAGES val:33 [ 35.297262] BUG: Bad rss-counter state mm:00000000ceb98f8a type:MM_ANONPAGES val:22 [ 35.643796] BUG: Bad rss-counter state mm:000000007d783908 type:MM_FILEPAGES val:33 [ 35.644598] BUG: Bad rss-counter state mm:000000007d783908 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43788' (ECDSA) to the list of known hosts. 2023/06/20 09:11:25 fuzzer started 2023/06/20 09:11:25 dialing manager at localhost:44161 2023/06/20 09:11:25 checking machine... 2023/06/20 09:11:25 checking revisions... [ 36.202493] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:11:25 testing simple program... [ 36.247985] cgroup: Unknown subsys name 'net' [ 36.280592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:11:23 Registers: info registers vcpu 0 RAX=00000000000005c8 RBX=ffff888009349be0 RCX=ffffea00003bee01 RDX=ffffea00003bee00 RSI=ffff8880095cc960 RDI=ffff888008441280 RBP=0000000000000000 RSP=ffff8880147e7600 R8 =ffff88800efb9e88 R9 =0000000000000000 R10=ffffea0000257300 R11=000000008066005a R12=dffffc0000000000 R13=ffff8880147e7640 R14=ffff8880087b6c80 R15=ffff8880095cc960 RIP=ffffffff81810196 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 00007f3a1a24b900 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=0000557b3857b768 CR3=000000000d5be000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5a59a9b4d50a71da00000000000ae988 XMM05=80b5664a325c90890000000000135028 XMM06=e4cb8bb95a7664b60000000000134170 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=0000000000000000 RDX=1ffff1100d9e73fc RSI=0000000000000004 RDI=ffff88806cf39f00 RBP=ffffffff85d3d010 RSP=ffff88806cf09d40 R8 =0000000000000001 R9 =ffffed100d9e13a3 R10=0000000000000003 R11=ffff88806cf09ff8 R12=ffff88806cf39500 R13=ffff88806cf39fe0 R14=0000000000000001 R15=ffff888008d751c0 RIP=ffffffff81235f94 RFL=00000016 [----AP-] 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=00007ffcf66c6868 CR3=0000000005482000 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=00007f94d68825100000559e83daa790 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