syzkaller login: [ 34.584653] BUG: Bad rss-counter state mm:0000000010511c82 type:MM_FILEPAGES val:33 [ 34.585674] BUG: Bad rss-counter state mm:0000000010511c82 type:MM_ANONPAGES val:22 [ 34.748516] ================================================================== [ 34.749643] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.750754] Read of size 8 at addr ffff8880101a5b38 by task sshd/221 [ 34.751820] [ 34.752042] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.752921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.753937] Call Trace: [ 34.754258] [ 34.754545] dump_stack_lvl+0x91/0xf0 [ 34.755035] print_report+0xcc/0x620 [ 34.755516] ? __virt_addr_valid+0x102/0x340 [ 34.756072] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.756692] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.757308] kasan_report+0xbe/0xf0 [ 34.757787] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.758413] vma_interval_tree_remove+0xc75/0xec0 [ 34.759021] vma_prepare+0xc54/0x11a0 [ 34.759504] __split_vma+0x5af/0x950 [ 34.759981] ? __pfx___split_vma+0x10/0x10 [ 34.760514] ? find_held_lock+0x2c/0x110 [ 34.761038] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.761630] ? lock_is_held_type+0x9f/0x120 [ 34.762180] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.762788] ? mtree_range_walk+0x632/0x900 [ 34.763354] ? mas_walk+0x5c7/0x7c0 [ 34.763832] do_vmi_munmap+0x1f1/0x2b0 [ 34.764325] mmap_region+0x1f9/0x2660 [ 34.764812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.765329] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.766052] ? __pfx_lock_acquire+0x10/0x10 [ 34.766599] ? __pfx_mmap_region+0x10/0x10 [ 34.767157] ? security_mmap_addr+0x7d/0xa0 [ 34.767700] ? get_unmapped_area+0x1f5/0x3f0 [ 34.768253] do_mmap+0x854/0xf00 [ 34.768696] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.769196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.769783] ksys_mmap_pgoff+0x3af/0x500 [ 34.770294] do_syscall_64+0x3f/0x90 [ 34.770774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.771425] RIP: 0033:0x7f5306e79d82 [ 34.771891] 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 [ 34.774016] RSP: 002b:00007ffd3db23f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.774922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5306e79d82 [ 34.775778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53062b3000 [ 34.776629] RBP: 00007f53062b3000 R08: 0000000000000009 R09: 0000000000001000 [ 34.777473] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb45559b20 [ 34.778335] R13: 00007ffd3db23f50 R14: 00007ffd3db23f80 R15: 00007ffd3db242e0 [ 34.779196] [ 34.779489] [ 34.779702] Allocated by task 214: [ 34.780138] kasan_save_stack+0x22/0x50 [ 34.780652] kasan_set_track+0x25/0x30 [ 34.781149] __kasan_slab_alloc+0x59/0x70 [ 34.781694] kmem_cache_alloc+0x16b/0x370 [ 34.782223] vm_area_dup+0x20/0x160 [ 34.782687] __split_vma+0x170/0x950 [ 34.783175] split_vma+0xc6/0x110 [ 34.783626] mprotect_fixup+0x8d2/0xb30 [ 34.784138] do_mprotect_pkey+0x87e/0xd40 [ 34.784666] __x64_sys_mprotect+0x78/0xc0 [ 34.785195] do_syscall_64+0x3f/0x90 [ 34.785689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.786342] [ 34.786565] Freed by task 19: [ 34.786951] kasan_save_stack+0x22/0x50 [ 34.787467] kasan_set_track+0x25/0x30 [ 34.787974] kasan_save_free_info+0x2b/0x50 [ 34.788514] __kasan_slab_free+0x10a/0x190 [ 34.789054] kmem_cache_free+0x10d/0x4d0 [ 34.789596] rcu_core+0x8c8/0x2860 [ 34.790053] __do_softirq+0x1b7/0x7d4 [ 34.790540] [ 34.790762] Last potentially related work creation: [ 34.791348] kasan_save_stack+0x22/0x50 [ 34.791854] __kasan_record_aux_stack+0x8e/0xa0 [ 34.792437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.793180] remove_vma+0x139/0x170 [ 34.793648] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.794208] do_vmi_munmap+0x1f1/0x2b0 [ 34.794697] __vm_munmap+0x138/0x3a0 [ 34.795183] __x64_sys_munmap+0x59/0x80 [ 34.795692] do_syscall_64+0x3f/0x90 [ 34.796172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.796814] [ 34.797033] The buggy address belongs to the object at ffff8880101a5ae0 [ 34.797033] which belongs to the cache vm_area_struct of size 168 [ 34.798529] The buggy address is located 88 bytes inside of [ 34.798529] freed 168-byte region [ffff8880101a5ae0, ffff8880101a5b88) [ 34.799960] [ 34.800180] The buggy address belongs to the physical page: [ 34.800849] page:00000000d77edd9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101a5 [ 34.801964] memcg:ffff88800f2de701 [ 34.802401] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.803055] page_type: 0xffffffff() [ 34.803510] raw: 0100000000000200 ffff88800879fc80 ffffea000065bfc0 dead000000000008 [ 34.804440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2de701 [ 34.805359] page dumped because: kasan: bad access detected [ 34.806041] [ 34.806259] Memory state around the buggy address: [ 34.806843] ffff8880101a5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.807707] ffff8880101a5a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.808572] >ffff8880101a5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.809449] ^ [ 34.810092] ffff8880101a5b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.810950] ffff8880101a5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.811818] ================================================================== [ 34.812782] Disabling lock debugging due to kernel taint [ 37.046984] BUG: Bad rss-counter state mm:00000000c308c7b3 type:MM_FILEPAGES val:33 [ 37.048014] BUG: Bad rss-counter state mm:00000000c308c7b3 type:MM_ANONPAGES val:22 [ 37.539164] BUG: Bad rss-counter state mm:00000000a6eb2dfd type:MM_FILEPAGES val:33 [ 37.540238] BUG: Bad rss-counter state mm:00000000a6eb2dfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53156' (ECDSA) to the list of known hosts. 2023/06/19 21:41:12 fuzzer started 2023/06/19 21:41:12 dialing manager at localhost:44161 2023/06/19 21:41:12 checking machine... 2023/06/19 21:41:12 checking revisions... [ 38.249523] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:41:12 testing simple program... [ 38.309736] cgroup: Unknown subsys name 'net' [ 38.348765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:41:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015a91b40 RSI=ffffffff81b28c9a RDI=0000000000000005 RBP=ffff88800d3ae900 RSP=ffff888016d57610 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801775cd84 R13=000000000000007c R14=ffff88800d018738 R15=ffff888016d57688 RIP=ffffffff814c081b 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 00007fc1c1524700 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=00007fb9e33cc1c0 CR3=000000000eb48000 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=2032313a31343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a31343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e57cc0 RCX=0000000000000001 RDX=1ffff110011caf27 RSI=ffff888008e57ca0 RDI=ffff888008e57938 RBP=ffff888008e50000 RSP=ffff888008e578b8 R8 =0000000000000001 R9 =ffff888008e57968 R10=0000000000038001 R11=0000000000020dae R12=ffff888008e57988 R13=ffff888008e57970 R14=ffff888008e57ca0 R15=ffff888008e57928 RIP=ffffffff81131ca6 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=00007ffe2eb4d000 CR3=0000000009916000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000