syzkaller login: [ 31.031799] BUG: Bad rss-counter state mm:00000000f164498d type:MM_FILEPAGES val:33 [ 31.032608] BUG: Bad rss-counter state mm:00000000f164498d type:MM_ANONPAGES val:22 [ 31.061895] ================================================================== [ 31.062573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.063205] Read of size 8 at addr ffff888017c13d08 by task sshd/221 [ 31.063699] [ 31.063841] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.064415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.065078] Call Trace: [ 31.065280] <TASK> [ 31.065459] dump_stack_lvl+0x91/0xf0 [ 31.065773] print_report+0xcc/0x620 [ 31.066272] ? __virt_addr_valid+0x102/0x340 [ 31.066648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.067080] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.067506] kasan_report+0xbe/0xf0 [ 31.067815] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.068205] vma_interval_tree_remove+0xc75/0xec0 [ 31.068599] vma_prepare+0xc54/0x11a0 [ 31.068899] __split_vma+0x5af/0x950 [ 31.069191] ? __pfx___split_vma+0x10/0x10 [ 31.069528] ? find_held_lock+0x2c/0x110 [ 31.069851] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.070204] ? lock_is_held_type+0x9f/0x120 [ 31.070548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.070921] ? mtree_range_walk+0x632/0x900 [ 31.071331] ? mas_walk+0x5c7/0x7c0 [ 31.071631] do_vmi_munmap+0x1f1/0x2b0 [ 31.071940] mmap_region+0x1f9/0x2660 [ 31.072241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.072565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.073009] ? __pfx_lock_acquire+0x10/0x10 [ 31.073344] ? __pfx_mmap_region+0x10/0x10 [ 31.073674] ? security_mmap_addr+0x7d/0xa0 [ 31.074024] ? get_unmapped_area+0x1f5/0x3f0 [ 31.074386] do_mmap+0x854/0xf00 [ 31.074679] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.075065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.075434] ksys_mmap_pgoff+0x3af/0x500 [ 31.075773] do_syscall_64+0x3f/0x90 [ 31.076085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076498] RIP: 0033:0x7f13eca51d82 [ 31.076818] 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 [ 31.078254] RSP: 002b:00007ffe721537b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.078829] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13eca51d82 [ 31.079416] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13ebe8b000 [ 31.079956] RBP: 00007f13ebe8b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.080488] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631111f0ec0 [ 31.081016] R13: 00007ffe721537d0 R14: 00007ffe72153800 R15: 00007ffe72153b60 [ 31.081551] </TASK> [ 31.081736] [ 31.081871] Allocated by task 214: [ 31.082150] kasan_save_stack+0x22/0x50 [ 31.082496] kasan_set_track+0x25/0x30 [ 31.082829] __kasan_slab_alloc+0x59/0x70 [ 31.083218] kmem_cache_alloc+0x16b/0x370 [ 31.083566] vm_area_dup+0x20/0x160 [ 31.083868] __split_vma+0x170/0x950 [ 31.084167] split_vma+0xc6/0x110 [ 31.084445] mprotect_fixup+0x8d2/0xb30 [ 31.084782] do_mprotect_pkey+0x87e/0xd40 [ 31.085136] __x64_sys_mprotect+0x78/0xc0 [ 31.085488] do_syscall_64+0x3f/0x90 [ 31.085821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086256] [ 31.086402] Freed by task 214: [ 31.086651] kasan_save_stack+0x22/0x50 [ 31.086975] kasan_set_track+0x25/0x30 [ 31.087268] kasan_save_free_info+0x2b/0x50 [ 31.087612] __kasan_slab_free+0x10a/0x190 [ 31.087957] kmem_cache_free+0x10d/0x4d0 [ 31.088283] rcu_core+0x8c8/0x2860 [ 31.088576] __do_softirq+0x1b7/0x7d4 [ 31.088896] [ 31.089042] Last potentially related work creation: [ 31.089433] kasan_save_stack+0x22/0x50 [ 31.089751] __kasan_record_aux_stack+0x8e/0xa0 [ 31.090116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.090533] remove_vma+0x139/0x170 [ 31.090832] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.091279] do_vmi_munmap+0x1f1/0x2b0 [ 31.091602] __vm_munmap+0x138/0x3a0 [ 31.091907] __x64_sys_munmap+0x59/0x80 [ 31.092226] do_syscall_64+0x3f/0x90 [ 31.092535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.092949] [ 31.093088] The buggy address belongs to the object at ffff888017c13cb0 [ 31.093088] which belongs to the cache vm_area_struct of size 168 [ 31.094048] The buggy address is located 88 bytes inside of [ 31.094048] freed 168-byte region [ffff888017c13cb0, ffff888017c13d58) [ 31.095009] [ 31.095157] The buggy address belongs to the physical page: [ 31.095599] page:000000009d785d13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c13 [ 31.096304] memcg:ffff88800f3bbe01 [ 31.096585] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.097008] page_type: 0xffffffff() [ 31.097309] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.097938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3bbe01 [ 31.098550] page dumped because: kasan: bad access detected [ 31.099013] [ 31.099151] Memory state around the buggy address: [ 31.099534] ffff888017c13c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.100102] ffff888017c13c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.100659] >ffff888017c13d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.101212] ^ [ 31.101504] ffff888017c13d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.102083] ffff888017c13e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.102636] ================================================================== [ 31.103512] Disabling lock debugging due to kernel taint [ 32.727682] BUG: Bad rss-counter state mm:00000000df323863 type:MM_FILEPAGES val:33 [ 32.728315] BUG: Bad rss-counter state mm:00000000df323863 type:MM_ANONPAGES val:22 [ 33.080764] BUG: Bad rss-counter state mm:000000000b5e5d93 type:MM_FILEPAGES val:33 [ 33.081402] BUG: Bad rss-counter state mm:000000000b5e5d93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64717' (ECDSA) to the list of known hosts. 2023/06/20 08:32:23 fuzzer started 2023/06/20 08:32:23 dialing manager at localhost:44161 2023/06/20 08:32:23 checking machine... 2023/06/20 08:32:23 checking revisions... [ 33.660610] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:32:23 testing simple program... [ 33.694444] cgroup: Unknown subsys name 'net' [ 33.729921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f1e9e0ac840 CR3=0000000017f26000 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=2033323a32333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a32333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff81710ed3 RDX=ffff888019e43680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fd8fd90 RSP=ffff88800fd8fbf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006da9c0 R13=ffff88800d920658 R14=ffff88800fd8fdb8 R15=ffffea00006da9f4 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff0612a8900 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=000055c098dde4f4 CR3=000000000b390000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000