syzkaller login: [ 30.532817] BUG: Bad rss-counter state mm:000000006f1ff5b0 type:MM_FILEPAGES val:33 [ 30.534888] BUG: Bad rss-counter state mm:000000006f1ff5b0 type:MM_ANONPAGES val:22 [ 30.707881] ================================================================== [ 30.708853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.709858] Read of size 8 at addr ffff888016beeb38 by task sshd/220 [ 30.710807] [ 30.711035] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.711944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.712986] Call Trace: [ 30.713321] [ 30.713646] dump_stack_lvl+0x91/0xf0 [ 30.714176] print_report+0xcc/0x620 [ 30.714681] ? __virt_addr_valid+0x102/0x340 [ 30.715252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715895] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716541] kasan_report+0xbe/0xf0 [ 30.717042] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717717] vma_interval_tree_remove+0xc75/0xec0 [ 30.718356] vma_prepare+0xc54/0x11a0 [ 30.718866] __split_vma+0x5af/0x950 [ 30.719371] ? __pfx___split_vma+0x10/0x10 [ 30.719934] ? find_held_lock+0x2c/0x110 [ 30.720493] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.721093] ? lock_is_held_type+0x9f/0x120 [ 30.721674] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.722327] ? mtree_range_walk+0x632/0x900 [ 30.722914] ? mas_walk+0x5c7/0x7c0 [ 30.723420] do_vmi_munmap+0x1f1/0x2b0 [ 30.723946] mmap_region+0x1f9/0x2660 [ 30.724463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.725006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.725788] ? __pfx_lock_acquire+0x10/0x10 [ 30.726354] ? __pfx_mmap_region+0x10/0x10 [ 30.726922] ? security_mmap_addr+0x7d/0xa0 [ 30.727487] ? get_unmapped_area+0x1f5/0x3f0 [ 30.728072] do_mmap+0x854/0xf00 [ 30.728537] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.729067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.729673] ksys_mmap_pgoff+0x3af/0x500 [ 30.730218] do_syscall_64+0x3f/0x90 [ 30.730726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.731411] RIP: 0033:0x7f20c65c3d82 [ 30.731891] 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 [ 30.734123] RSP: 002b:00007ffc73e19aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.735071] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20c65c3d82 [ 30.735967] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20c59fd000 [ 30.736854] RBP: 00007f20c59fd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.737762] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557eddae7f60 [ 30.738644] R13: 00007ffc73e19ac0 R14: 00007ffc73e19af0 R15: 00007ffc73e19e50 [ 30.739532] [ 30.739836] [ 30.740061] Allocated by task 213: [ 30.740509] kasan_save_stack+0x22/0x50 [ 30.741039] kasan_set_track+0x25/0x30 [ 30.741571] __kasan_slab_alloc+0x59/0x70 [ 30.742121] kmem_cache_alloc+0x16b/0x370 [ 30.742662] vm_area_dup+0x20/0x160 [ 30.743138] __split_vma+0x170/0x950 [ 30.743626] split_vma+0xc6/0x110 [ 30.744085] mprotect_fixup+0x8d2/0xb30 [ 30.744617] do_mprotect_pkey+0x87e/0xd40 [ 30.745158] __x64_sys_mprotect+0x78/0xc0 [ 30.745725] do_syscall_64+0x3f/0x90 [ 30.746222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746896] [ 30.747119] Freed by task 213: [ 30.747528] kasan_save_stack+0x22/0x50 [ 30.748056] kasan_set_track+0x25/0x30 [ 30.748570] kasan_save_free_info+0x2b/0x50 [ 30.749127] __kasan_slab_free+0x10a/0x190 [ 30.749694] kmem_cache_free+0x10d/0x4d0 [ 30.750221] rcu_core+0x8c8/0x2860 [ 30.750681] __do_softirq+0x1b7/0x7d4 [ 30.751178] [ 30.751405] Last potentially related work creation: [ 30.752005] kasan_save_stack+0x22/0x50 [ 30.752521] __kasan_record_aux_stack+0x8e/0xa0 [ 30.753109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.753780] remove_vma+0x139/0x170 [ 30.754244] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.754822] do_vmi_munmap+0x1f1/0x2b0 [ 30.755332] __vm_munmap+0x138/0x3a0 [ 30.755818] __x64_sys_munmap+0x59/0x80 [ 30.756326] do_syscall_64+0x3f/0x90 [ 30.756815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757482] [ 30.757708] The buggy address belongs to the object at ffff888016beeae0 [ 30.757708] which belongs to the cache vm_area_struct of size 168 [ 30.759212] The buggy address is located 88 bytes inside of [ 30.759212] freed 168-byte region [ffff888016beeae0, ffff888016beeb88) [ 30.760663] [ 30.760887] The buggy address belongs to the physical page: [ 30.761588] page:00000000ceba92be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bee [ 30.762709] memcg:ffff888014499001 [ 30.763145] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.763809] page_type: 0xffffffff() [ 30.764273] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.765218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014499001 [ 30.766162] page dumped because: kasan: bad access detected [ 30.766845] [ 30.767064] Memory state around the buggy address: [ 30.767655] ffff888016beea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.768511] ffff888016beea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.769379] >ffff888016beeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.770256] ^ [ 30.770875] ffff888016beeb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.771740] ffff888016beec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.772607] ================================================================== [ 30.773873] Disabling lock debugging due to kernel taint [ 32.761797] BUG: Bad rss-counter state mm:00000000dd52e431 type:MM_FILEPAGES val:33 [ 32.763123] BUG: Bad rss-counter state mm:00000000dd52e431 type:MM_ANONPAGES val:22 [ 33.211054] BUG: Bad rss-counter state mm:000000008a13449d type:MM_FILEPAGES val:33 [ 33.212412] BUG: Bad rss-counter state mm:000000008a13449d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53318' (ECDSA) to the list of known hosts. 2023/06/21 07:56:56 fuzzer started 2023/06/21 07:56:56 dialing manager at localhost:36067 2023/06/21 07:56:56 checking machine... 2023/06/21 07:56:56 checking revisions... [ 33.934279] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:56:56 testing simple program... [ 33.983045] cgroup: Unknown subsys name 'net' [ 34.023424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888018487a40 RSP=ffff888018487978 R8 =ffffffff864b2030 R9 =ffff888018487a28 R10=0000000000038001 R11=00000000000b5080 R12=ffff888018487a48 R13=ffff888018487a30 R14=0000000000000004 R15=ffff8880184879e8 RIP=ffffffff81131711 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 00007f8c0fb34900 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=00007ffd5762c000 CR3=0000000016a58000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fb30b404f30 CR3=000000000d55c000 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=dfaeee0c55fdccb0844ed841a0991f6d XMM02=2c67c8bc2e329bc3000000000011a830 XMM03=fb795ef6d65770560000000000122178 XMM04=336eea2fd67e3ce700000000000ae988 XMM05=237ea4ec7ac65acb0000000000132d98 XMM06=4fda316b135da52b0000000000131e38 XMM07=e042d86d42eb936e00000000001223f8 XMM08=5b33f5d87981700d000000000011a890 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000