syzkaller login: [ 30.480784] BUG: Bad rss-counter state mm:000000008927d668 type:MM_FILEPAGES val:33 [ 30.481794] BUG: Bad rss-counter state mm:000000008927d668 type:MM_ANONPAGES val:22 [ 30.642001] ================================================================== [ 30.643086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.644137] Read of size 8 at addr ffff88800f1d36b0 by task sshd/219 [ 30.645033] [ 30.645272] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.646170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.647187] Call Trace: [ 30.647519] [ 30.647815] dump_stack_lvl+0x91/0xf0 [ 30.648324] print_report+0xcc/0x620 [ 30.648826] ? __virt_addr_valid+0x102/0x340 [ 30.649412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650064] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650707] kasan_report+0xbe/0xf0 [ 30.651221] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651867] vma_interval_tree_remove+0xc75/0xec0 [ 30.652496] vma_prepare+0xc54/0x11a0 [ 30.653015] __split_vma+0x5af/0x950 [ 30.653506] ? __pfx___split_vma+0x10/0x10 [ 30.654060] ? find_held_lock+0x2c/0x110 [ 30.654610] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.655235] ? lock_is_held_type+0x9f/0x120 [ 30.655796] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.656434] ? mtree_range_walk+0x632/0x900 [ 30.657021] ? mas_walk+0x5c7/0x7c0 [ 30.657523] do_vmi_munmap+0x1f1/0x2b0 [ 30.658045] mmap_region+0x1f9/0x2660 [ 30.658555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.659102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.659856] ? __pfx_lock_acquire+0x10/0x10 [ 30.660423] ? __pfx_mmap_region+0x10/0x10 [ 30.660988] ? security_mmap_addr+0x7d/0xa0 [ 30.661554] ? get_unmapped_area+0x1f5/0x3f0 [ 30.662136] do_mmap+0x854/0xf00 [ 30.662595] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.663113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.663724] ksys_mmap_pgoff+0x3af/0x500 [ 30.664266] do_syscall_64+0x3f/0x90 [ 30.664782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.665464] RIP: 0033:0x7fd72df20d82 [ 30.665959] 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 [ 30.668206] RSP: 002b:00007ffe5feb98a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.669171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd72df20d82 [ 30.670066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd72d35a000 [ 30.670961] RBP: 00007fd72d35a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.671858] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2e6f54ec0 [ 30.672745] R13: 00007ffe5feb98c0 R14: 00007ffe5feb98f0 R15: 00007ffe5feb9c50 [ 30.673630] [ 30.673943] [ 30.674174] Allocated by task 212: [ 30.674619] kasan_save_stack+0x22/0x50 [ 30.675168] kasan_set_track+0x25/0x30 [ 30.675689] __kasan_slab_alloc+0x59/0x70 [ 30.676241] kmem_cache_alloc+0x16b/0x370 [ 30.676778] vm_area_dup+0x20/0x160 [ 30.677258] __split_vma+0x170/0x950 [ 30.677742] split_vma+0xc6/0x110 [ 30.678199] mprotect_fixup+0x8d2/0xb30 [ 30.678729] do_mprotect_pkey+0x87e/0xd40 [ 30.679306] __x64_sys_mprotect+0x78/0xc0 [ 30.679849] do_syscall_64+0x3f/0x90 [ 30.680343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.681022] [ 30.681253] Freed by task 212: [ 30.681662] kasan_save_stack+0x22/0x50 [ 30.682197] kasan_set_track+0x25/0x30 [ 30.682727] kasan_save_free_info+0x2b/0x50 [ 30.683314] __kasan_slab_free+0x10a/0x190 [ 30.683846] kmem_cache_free+0x10d/0x4d0 [ 30.684356] rcu_core+0x8c8/0x2860 [ 30.684802] __do_softirq+0x1b7/0x7d4 [ 30.685279] [ 30.685498] Last potentially related work creation: [ 30.686077] kasan_save_stack+0x22/0x50 [ 30.686627] __kasan_record_aux_stack+0x8e/0xa0 [ 30.687237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.687909] remove_vma+0x139/0x170 [ 30.688379] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.688964] do_vmi_munmap+0x1f1/0x2b0 [ 30.689467] __vm_munmap+0x138/0x3a0 [ 30.689956] __x64_sys_munmap+0x59/0x80 [ 30.690469] do_syscall_64+0x3f/0x90 [ 30.690962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.691642] [ 30.691868] The buggy address belongs to the object at ffff88800f1d3658 [ 30.691868] which belongs to the cache vm_area_struct of size 168 [ 30.693386] The buggy address is located 88 bytes inside of [ 30.693386] freed 168-byte region [ffff88800f1d3658, ffff88800f1d3700) [ 30.694852] [ 30.695075] The buggy address belongs to the physical page: [ 30.695791] page:00000000b63ceec6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1d3 [ 30.696925] memcg:ffff88801990dc01 [ 30.697364] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.698042] page_type: 0xffffffff() [ 30.698518] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.699496] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801990dc01 [ 30.700438] page dumped because: kasan: bad access detected [ 30.701120] [ 30.701352] Memory state around the buggy address: [ 30.701960] ffff88800f1d3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.702851] ffff88800f1d3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.703921] >ffff88800f1d3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.704968] ^ [ 30.705678] ffff88800f1d3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.706780] ffff88800f1d3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.707848] ================================================================== [ 30.708965] Disabling lock debugging due to kernel taint [ 32.676963] BUG: Bad rss-counter state mm:000000001153db63 type:MM_FILEPAGES val:33 [ 32.678226] BUG: Bad rss-counter state mm:000000001153db63 type:MM_ANONPAGES val:22 [ 33.060883] BUG: Bad rss-counter state mm:00000000e224d2b9 type:MM_FILEPAGES val:33 [ 33.061827] BUG: Bad rss-counter state mm:00000000e224d2b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45204' (ECDSA) to the list of known hosts. 2023/06/20 22:12:53 fuzzer started 2023/06/20 22:12:53 dialing manager at localhost:36067 2023/06/20 22:12:53 checking machine... 2023/06/20 22:12:53 checking revisions... [ 33.780949] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:12:53 testing simple program... [ 33.838744] cgroup: Unknown subsys name 'net' [ 33.887760] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:53 Registers: info registers vcpu 0 RAX=00000011e7ec31d7 RBX=ffff88806ce395c0 RCX=1ffff11002b2901a RDX=dffffc0000000000 RSI=ffff8880196d3700 RDI=ffff8880159480d0 RBP=ffff888015948080 RSP=ffff88800cbff4e8 R8 =ffff8880196d3750 R9 =ffffed100197fea2 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888015948080 R13=ffff888015948090 R14=0000000000000000 R15=ffff88800cbff600 RIP=ffffffff81251bfc RFL=00000082 [--S----] 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 00007fe1122b3900 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=00007fe11286a618 CR3=000000000e754000 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=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 info registers vcpu 1 RAX=ffffed100d9e6a01 RBX=ffff88806cf35000 RCX=ffffffff845124d7 RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffff88806cf35000 RBP=ffffed100d9e6a00 RSP=ffff888008e07e40 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=0000000000000000 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180f12f RFL=00000046 [---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=00007f87643e7320 CR3=0000000014550000 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=799cc8d457f8f08ace427aaea9405c9b XMM02=2c67c8bc2e329bc3000000000011a018 XMM03=fb795ef6d65770560000000000121480 XMM04=21211792b7092a1c00000000000ae988 XMM05=2becdf68679f66730000000000132098 XMM06=806171799158d9670000000000131138 XMM07=e042d86d42eb936e0000000000121700 XMM08=0aceff9f9e80b504000000000011a078 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000