[ 27.075716] BUG: Bad rss-counter state mm:000000004cfe5d68 type:MM_FILEPAGES val:33 [ 27.076994] BUG: Bad rss-counter state mm:000000004cfe5d68 type:MM_ANONPAGES val:22 [ 27.217270] ================================================================== [ 27.218169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.219118] Read of size 8 at addr ffff888016596798 by task sshd/219 [ 27.219923] [ 27.220137] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.221092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.222076] Call Trace: [ 27.222402] [ 27.222693] dump_stack_lvl+0x91/0xf0 [ 27.223172] print_report+0xcc/0x620 [ 27.223667] ? __virt_addr_valid+0x102/0x340 [ 27.224225] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.224845] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.225453] kasan_report+0xbe/0xf0 [ 27.225951] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.226566] vma_interval_tree_remove+0xc75/0xec0 [ 27.227164] vma_prepare+0xc54/0x11a0 [ 27.227660] __split_vma+0x5af/0x950 [ 27.228133] ? __pfx___split_vma+0x10/0x10 [ 27.228659] ? find_held_lock+0x2c/0x110 [ 27.229187] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.229747] ? lock_is_held_type+0x9f/0x120 [ 27.230283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.230895] ? mtree_range_walk+0x632/0x900 [ 27.231437] ? mas_walk+0x5c7/0x7c0 [ 27.231941] do_vmi_munmap+0x1f1/0x2b0 [ 27.232436] mmap_region+0x1f9/0x2660 [ 27.232915] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.233434] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.234148] ? __pfx_lock_acquire+0x10/0x10 [ 27.234682] ? __pfx_mmap_region+0x10/0x10 [ 27.235203] ? security_mmap_addr+0x7d/0xa0 [ 27.235739] ? get_unmapped_area+0x1f5/0x3f0 [ 27.236284] do_mmap+0x854/0xf00 [ 27.236721] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.237209] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.237778] ksys_mmap_pgoff+0x3af/0x500 [ 27.238278] do_syscall_64+0x3f/0x90 [ 27.238752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.239387] RIP: 0033:0x7f0dc151bd82 [ 27.239851] 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 [ 27.241953] RSP: 002b:00007ffd6db4a148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.242847] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0dc151bd82 [ 27.243707] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0dc0955000 [ 27.244554] RBP: 00007f0dc0955000 R08: 0000000000000009 R09: 0000000000001000 [ 27.245393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d224fbff70 [ 27.246238] R13: 00007ffd6db4a160 R14: 00007ffd6db4a190 R15: 00007ffd6db4a4f0 [ 27.247086] [ 27.247378] [ 27.247590] Allocated by task 212: [ 27.248022] kasan_save_stack+0x22/0x50 [ 27.248522] kasan_set_track+0x25/0x30 [ 27.249011] __kasan_slab_alloc+0x59/0x70 [ 27.249526] kmem_cache_alloc+0x16b/0x370 [ 27.250049] vm_area_dup+0x20/0x160 [ 27.250502] __split_vma+0x170/0x950 [ 27.250969] split_vma+0xc6/0x110 [ 27.251410] mprotect_fixup+0x8d2/0xb30 [ 27.251932] do_mprotect_pkey+0x87e/0xd40 [ 27.252449] __x64_sys_mprotect+0x78/0xc0 [ 27.252974] do_syscall_64+0x3f/0x90 [ 27.253443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.254079] [ 27.254293] Freed by task 212: [ 27.254687] kasan_save_stack+0x22/0x50 [ 27.255187] kasan_set_track+0x25/0x30 [ 27.255692] kasan_save_free_info+0x2b/0x50 [ 27.256217] __kasan_slab_free+0x10a/0x190 [ 27.256751] kmem_cache_free+0x10d/0x4d0 [ 27.257250] rcu_core+0x8c8/0x2860 [ 27.257691] __do_softirq+0x1b7/0x7d4 [ 27.258161] [ 27.258377] Last potentially related work creation: [ 27.258960] kasan_save_stack+0x22/0x50 [ 27.259463] __kasan_record_aux_stack+0x8e/0xa0 [ 27.260053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.260693] remove_vma+0x139/0x170 [ 27.261141] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.261693] do_vmi_munmap+0x1f1/0x2b0 [ 27.262169] __vm_munmap+0x138/0x3a0 [ 27.262635] __x64_sys_munmap+0x59/0x80 [ 27.263126] do_syscall_64+0x3f/0x90 [ 27.263604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.264260] [ 27.264473] The buggy address belongs to the object at ffff888016596740 [ 27.264473] which belongs to the cache vm_area_struct of size 168 [ 27.265945] The buggy address is located 88 bytes inside of [ 27.265945] freed 168-byte region [ffff888016596740, ffff8880165967e8) [ 27.267349] [ 27.267563] The buggy address belongs to the physical page: [ 27.268251] page:0000000067686759 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16596 [ 27.269329] memcg:ffff88800ebe8c01 [ 27.269754] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.270458] page_type: 0xffffffff() [ 27.270910] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 27.271826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebe8c01 [ 27.272732] page dumped because: kasan: bad access detected [ 27.273387] [ 27.273600] Memory state around the buggy address: [ 27.274178] ffff888016596680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.275018] ffff888016596700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 27.275879] >ffff888016596780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 27.276723] ^ [ 27.277209] ffff888016596800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 27.278052] ffff888016596880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 27.278892] ================================================================== [ 27.279964] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.821021] BUG: Bad rss-counter state mm:00000000969bee78 type:MM_FILEPAGES val:33 [ 28.821799] BUG: Bad rss-counter state mm:00000000969bee78 type:MM_ANONPAGES val:22 [ 29.282256] BUG: Bad rss-counter state mm:00000000ea0ee0ad type:MM_FILEPAGES val:33 [ 29.283310] BUG: Bad rss-counter state mm:00000000ea0ee0ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35065' (ECDSA) to the list of known hosts. 2023/06/19 20:00:46 fuzzer started 2023/06/19 20:00:46 dialing manager at localhost:44161 2023/06/19 20:00:46 checking machine... 2023/06/19 20:00:46 checking revisions... [ 29.995622] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:00:46 testing simple program... [ 30.044053] cgroup: Unknown subsys name 'net' [ 30.089176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b2b5a RDX=ffff888015f57590 RSI=1ffff11002beaeb4 RDI=1ffff11002beaeb4 RBP=ffff888015f575a0 RSP=ffff888015f574d8 R8 =ffffffff863b2b5e R9 =ffff888015f57588 R10=0000000000038001 R11=000000000008abed R12=ffff888015f575a8 R13=ffff888015f57590 R14=ffff888015f57f40 R15=ffff888015f57548 RIP=ffffffff811310a7 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 00007f2048a22900 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=00007ffd3a3b1000 CR3=000000000db94000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f58e0d44000 CR3=000000000f4c0000 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=2035343a30303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a30303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000