syzkaller login: [ 31.608117] BUG: Bad rss-counter state mm:000000004d861aae type:MM_FILEPAGES val:33 [ 31.609135] BUG: Bad rss-counter state mm:000000004d861aae type:MM_ANONPAGES val:22 [ 31.769883] ================================================================== [ 31.771024] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.772022] Read of size 8 at addr ffff88801a2ad6b0 by task sshd/220 [ 31.772935] [ 31.773156] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.774033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.775043] Call Trace: [ 31.775367] [ 31.775657] dump_stack_lvl+0x91/0xf0 [ 31.776155] print_report+0xcc/0x620 [ 31.776644] ? __virt_addr_valid+0x102/0x340 [ 31.777205] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.777835] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.778460] kasan_report+0xbe/0xf0 [ 31.778983] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.779617] vma_interval_tree_remove+0xc75/0xec0 [ 31.780234] vma_prepare+0xc54/0x11a0 [ 31.780726] __split_vma+0x5af/0x950 [ 31.781208] ? __pfx___split_vma+0x10/0x10 [ 31.781751] ? find_held_lock+0x2c/0x110 [ 31.782284] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.782870] ? lock_is_held_type+0x9f/0x120 [ 31.783415] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.784031] ? mtree_range_walk+0x632/0x900 [ 31.784595] ? mas_walk+0x5c7/0x7c0 [ 31.785082] do_vmi_munmap+0x1f1/0x2b0 [ 31.785591] mmap_region+0x1f9/0x2660 [ 31.786091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.786619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.787355] ? __pfx_lock_acquire+0x10/0x10 [ 31.787898] ? __pfx_mmap_region+0x10/0x10 [ 31.788444] ? security_mmap_addr+0x7d/0xa0 [ 31.788980] ? get_unmapped_area+0x1f5/0x3f0 [ 31.789542] do_mmap+0x854/0xf00 [ 31.789985] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.790496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.791094] ksys_mmap_pgoff+0x3af/0x500 [ 31.791619] do_syscall_64+0x3f/0x90 [ 31.792123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.792798] RIP: 0033:0x7f07bcdced82 [ 31.793279] 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 [ 31.795496] RSP: 002b:00007ffed63db1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.796421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07bcdced82 [ 31.797297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07bc208000 [ 31.798169] RBP: 00007f07bc208000 R08: 0000000000000009 R09: 0000000000001000 [ 31.799066] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3e0820d90 [ 31.799948] R13: 00007ffed63db1d0 R14: 00007ffed63db200 R15: 00007ffed63db560 [ 31.800830] [ 31.801137] [ 31.801355] Allocated by task 213: [ 31.801795] kasan_save_stack+0x22/0x50 [ 31.802322] kasan_set_track+0x25/0x30 [ 31.802860] __kasan_slab_alloc+0x59/0x70 [ 31.803403] kmem_cache_alloc+0x16b/0x370 [ 31.803928] vm_area_dup+0x20/0x160 [ 31.804408] __split_vma+0x170/0x950 [ 31.804891] split_vma+0xc6/0x110 [ 31.805342] mprotect_fixup+0x8d2/0xb30 [ 31.805862] do_mprotect_pkey+0x87e/0xd40 [ 31.806402] __x64_sys_mprotect+0x78/0xc0 [ 31.806940] do_syscall_64+0x3f/0x90 [ 31.807431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.808094] [ 31.808320] Freed by task 213: [ 31.808722] kasan_save_stack+0x22/0x50 [ 31.809258] kasan_set_track+0x25/0x30 [ 31.809767] kasan_save_free_info+0x2b/0x50 [ 31.810317] __kasan_slab_free+0x10a/0x190 [ 31.810888] kmem_cache_free+0x10d/0x4d0 [ 31.811416] rcu_core+0x8c8/0x2860 [ 31.811874] __do_softirq+0x1b7/0x7d4 [ 31.812374] [ 31.812602] Last potentially related work creation: [ 31.813213] kasan_save_stack+0x22/0x50 [ 31.813738] __kasan_record_aux_stack+0x8e/0xa0 [ 31.814384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.815052] remove_vma+0x139/0x170 [ 31.815516] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.816097] do_vmi_munmap+0x1f1/0x2b0 [ 31.816604] __vm_munmap+0x138/0x3a0 [ 31.817091] __x64_sys_munmap+0x59/0x80 [ 31.817606] do_syscall_64+0x3f/0x90 [ 31.818092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818767] [ 31.818998] The buggy address belongs to the object at ffff88801a2ad658 [ 31.818998] which belongs to the cache vm_area_struct of size 168 [ 31.820530] The buggy address is located 88 bytes inside of [ 31.820530] freed 168-byte region [ffff88801a2ad658, ffff88801a2ad700) [ 31.821974] [ 31.822200] The buggy address belongs to the physical page: [ 31.822898] page:000000004f0b9fe5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2ad [ 31.824041] memcg:ffff88800dca8d01 [ 31.824485] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.825149] page_type: 0xffffffff() [ 31.825604] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.826554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dca8d01 [ 31.827506] page dumped because: kasan: bad access detected [ 31.828193] [ 31.828421] Memory state around the buggy address: [ 31.829034] ffff88801a2ad580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.829913] ffff88801a2ad600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.830830] >ffff88801a2ad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.831705] ^ [ 31.832307] ffff88801a2ad700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.833198] ffff88801a2ad780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.834082] ================================================================== [ 31.835123] Disabling lock debugging due to kernel taint [ 34.837441] BUG: Bad rss-counter state mm:0000000041d98143 type:MM_FILEPAGES val:33 [ 34.838673] BUG: Bad rss-counter state mm:0000000041d98143 type:MM_ANONPAGES val:22 [ 35.325000] BUG: Bad rss-counter state mm:000000003eeb341e type:MM_FILEPAGES val:33 [ 35.326013] BUG: Bad rss-counter state mm:000000003eeb341e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46412' (ECDSA) to the list of known hosts. 2023/06/20 04:21:12 fuzzer started 2023/06/20 04:21:13 dialing manager at localhost:44161 2023/06/20 04:21:13 checking machine... 2023/06/20 04:21:13 checking revisions... [ 36.068199] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:21:13 testing simple program... [ 36.128418] cgroup: Unknown subsys name 'net' [ 36.195842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:21:11 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffff88806ce09af0 RSP=ffff88806ce099a8 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d91630 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc20 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 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=0000560a1b761000 CR3=0000000005482000 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=00007f4b019395100000560a1b75d790 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff88801a163a74 RBP=ffff88801a163680 RSP=ffff88800f07f498 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f0217191163 R13=0000000000000000 R14=ffff88801a163680 R15=00000000000000a4 RIP=ffffffff8135bd5e 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 00007f0216c9e900 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=00007f0217255618 CR3=000000000c4c6000 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=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