[ 31.080888] BUG: Bad rss-counter state mm:00000000b8479be7 type:MM_FILEPAGES val:33 [ 31.082084] BUG: Bad rss-counter state mm:00000000b8479be7 type:MM_ANONPAGES val:22 [ 31.170672] ================================================================== [ 31.171792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.172737] Read of size 8 at addr ffff888017f01a50 by task sshd/220 [ 31.173664] [ 31.173889] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.174752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.175778] Call Trace: [ 31.176096] <TASK> [ 31.176392] dump_stack_lvl+0x91/0xf0 [ 31.176890] print_report+0xcc/0x620 [ 31.177380] ? __virt_addr_valid+0x102/0x340 [ 31.177939] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.178562] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.179191] kasan_report+0xbe/0xf0 [ 31.179680] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.180305] vma_interval_tree_remove+0xc75/0xec0 [ 31.180910] vma_prepare+0xc54/0x11a0 [ 31.181385] __split_vma+0x5af/0x950 [ 31.181854] ? __pfx___split_vma+0x10/0x10 [ 31.182387] ? find_held_lock+0x2c/0x110 [ 31.182905] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.183486] ? lock_is_held_type+0x9f/0x120 [ 31.184026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.184637] ? mtree_range_walk+0x632/0x900 [ 31.185192] ? mas_walk+0x5c7/0x7c0 [ 31.185671] do_vmi_munmap+0x1f1/0x2b0 [ 31.186168] mmap_region+0x1f9/0x2660 [ 31.186651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.187162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.187882] ? __pfx_lock_acquire+0x10/0x10 [ 31.188422] ? __pfx_mmap_region+0x10/0x10 [ 31.188951] ? security_mmap_addr+0x7d/0xa0 [ 31.189483] ? get_unmapped_area+0x1f5/0x3f0 [ 31.190028] do_mmap+0x854/0xf00 [ 31.190468] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.190961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.191534] ksys_mmap_pgoff+0x3af/0x500 [ 31.192038] do_syscall_64+0x3f/0x90 [ 31.192522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193174] RIP: 0033:0x7fee18fb1d82 [ 31.193633] 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 [ 31.195786] RSP: 002b:00007ffd3de91948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.196686] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee18fb1d82 [ 31.197532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee183eb000 [ 31.198385] RBP: 00007fee183eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.199241] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573ec4feec0 [ 31.200097] R13: 00007ffd3de91960 R14: 00007ffd3de91990 R15: 00007ffd3de91cf0 [ 31.200956] </TASK> [ 31.201251] [ 31.201477] Allocated by task 213: [ 31.201903] kasan_save_stack+0x22/0x50 [ 31.202406] kasan_set_track+0x25/0x30 [ 31.202898] __kasan_slab_alloc+0x59/0x70 [ 31.203435] kmem_cache_alloc+0x16b/0x370 [ 31.203949] vm_area_dup+0x20/0x160 [ 31.204403] __split_vma+0x170/0x950 [ 31.204869] split_vma+0xc6/0x110 [ 31.205302] mprotect_fixup+0x8d2/0xb30 [ 31.205805] do_mprotect_pkey+0x87e/0xd40 [ 31.206323] __x64_sys_mprotect+0x78/0xc0 [ 31.206849] do_syscall_64+0x3f/0x90 [ 31.207341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207982] [ 31.208194] Freed by task 204: [ 31.208586] kasan_save_stack+0x22/0x50 [ 31.209089] kasan_set_track+0x25/0x30 [ 31.209578] kasan_save_free_info+0x2b/0x50 [ 31.210108] __kasan_slab_free+0x10a/0x190 [ 31.210638] kmem_cache_free+0x10d/0x4d0 [ 31.211139] rcu_core+0x8c8/0x2860 [ 31.211590] __do_softirq+0x1b7/0x7d4 [ 31.212064] [ 31.212276] Last potentially related work creation: [ 31.212864] kasan_save_stack+0x22/0x50 [ 31.213363] __kasan_record_aux_stack+0x8e/0xa0 [ 31.213929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.214567] remove_vma+0x139/0x170 [ 31.215056] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.215629] do_vmi_munmap+0x1f1/0x2b0 [ 31.216117] __vm_munmap+0x138/0x3a0 [ 31.216581] __x64_sys_munmap+0x59/0x80 [ 31.217078] do_syscall_64+0x3f/0x90 [ 31.217548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218197] [ 31.218410] The buggy address belongs to the object at ffff888017f019f8 [ 31.218410] which belongs to the cache vm_area_struct of size 168 [ 31.219870] The buggy address is located 88 bytes inside of [ 31.219870] freed 168-byte region [ffff888017f019f8, ffff888017f01aa0) [ 31.221266] [ 31.221483] The buggy address belongs to the physical page: [ 31.222138] page:000000003218b993 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f01 [ 31.223244] memcg:ffff888016a3ff01 [ 31.223742] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.224535] page_type: 0xffffffff() [ 31.225080] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.226193] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a3ff01 [ 31.227298] page dumped because: kasan: bad access detected [ 31.228107] [ 31.228367] Memory state around the buggy address: [ 31.229078] ffff888017f01900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.230124] ffff888017f01980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.231174] >ffff888017f01a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.232223] ^ [ 31.233080] ffff888017f01a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.234119] ffff888017f01b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.235158] ================================================================== [ 31.236298] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.248833] BUG: Bad rss-counter state mm:00000000a4916a87 type:MM_FILEPAGES val:33 [ 33.250148] BUG: Bad rss-counter state mm:00000000a4916a87 type:MM_ANONPAGES val:22 [ 33.699462] BUG: Bad rss-counter state mm:000000006b967957 type:MM_FILEPAGES val:33 [ 33.700619] BUG: Bad rss-counter state mm:000000006b967957 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15414' (ECDSA) to the list of known hosts. 2023/06/20 17:13:33 fuzzer started 2023/06/20 17:13:33 dialing manager at localhost:36067 2023/06/20 17:13:33 checking machine... 2023/06/20 17:13:33 checking revisions... [ 34.370489] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:13:33 testing simple program... [ 34.417896] cgroup: Unknown subsys name 'net' [ 34.472960] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:13:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800dc4f848 RCX=0000000000000001 RDX=1ffff11001b89f09 RSI=ffff88800dc4fbb0 RDI=ffff88800dc4f848 RBP=ffff88800dc4f8e0 RSP=ffff88800dc4f830 R8 =0000000000000001 R9 =ffff88800dc4f888 R10=0000000000038001 R11=0000000000020de5 R12=ffff88800dc4f910 R13=0000000000000000 R14=ffff888019feb680 R15=0000000000092cc0 RIP=ffffffff8113035a RFL=00000216 [----AP-] 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 00007faacf083900 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=00007faacf63a618 CR3=000000000ebda000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f626879a650 CR3=000000000d548000 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=5d90dc8384d94aa43b42d5946067011e XMM02=2c67c8bc2e329bc3000000000011b0c8 XMM03=fb795ef6d65770560000000000121a68 XMM04=054c21262ca0d59400000000000ae988 XMM05=add302c1683784480000000000132738 XMM06=4fda316b135da52b0000000000131468 XMM07=e042d86d42eb936e0000000000121d40 XMM08=9921f4856cfec32b000000000011b128 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000