syzbot


WARNING in iopt_map_pages

Status: fixed on 2024/10/22 11:56
Subsystems: iommu
[Documentation on labels]
Reported-by: syzbot+16073ebbc4c64b819b47@syzkaller.appspotmail.com
Fix commit: 8f6887349b2f iommufd: Protect against overflow of ALIGN() during iova allocation
First crash: 168d, last: 84d
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [iommu?] WARNING in iopt_map_pages 0 (1) 2024/06/09 13:23
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/08/29 05:44 15m retest repro upstream report log
2024/07/15 04:17 15m retest repro upstream report log
2024/06/19 17:52 4h52m retest repro upstream error
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/08/15 03:07 1h32m bisect fix upstream OK (0) job log log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5092 at drivers/iommu/iommufd/io_pagetable.c:268 iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:268 [inline]
WARNING: CPU: 1 PID: 5092 at drivers/iommu/iommufd/io_pagetable.c:268 iopt_map_pages+0xf95/0x1050 drivers/iommu/iommufd/io_pagetable.c:352
Modules linked in:
CPU: 1 PID: 5092 Comm: syz-executor294 Not tainted 6.10.0-rc5-syzkaller-00294-g3ffea9a7a6f7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:268 [inline]
RIP: 0010:iopt_map_pages+0xf95/0x1050 drivers/iommu/iommufd/io_pagetable.c:352
Code: fc e9 a4 f3 ff ff e8 1a 8b 4c fc 41 be e4 ff ff ff e9 8a f3 ff ff e8 0a 8b 4c fc 90 0f 0b 90 e9 37 f5 ff ff e8 fc 8a 4c fc 90 <0f> 0b 90 e9 68 f3 ff ff 48 c7 c1 ec 82 ad 8f 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90003ebf9e0 EFLAGS: 00010293
RAX: ffffffff85499fa4 RBX: 00000000ffffffef RCX: ffff888079b49e00
RDX: 0000000000000000 RSI: 00000000ffffffef RDI: 0000000000000000
RBP: ffffc90003ebfc50 R08: ffffffff85499b30 R09: ffffffff85499942
R10: 0000000000000002 R11: ffff888079b49e00 R12: ffff8880228e0010
R13: 0000000000000000 R14: 1ffff920007d7f68 R15: ffffc90003ebfd00
FS:  000055557d760380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 000000007404a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iommufd_ioas_copy+0x610/0x7b0 drivers/iommu/iommufd/ioas.c:274
 iommufd_fops_ioctl+0x4d9/0x5a0 drivers/iommu/iommufd/main.c:421
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f319fdb3429
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd7a738738 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffd7a738908 RCX: 00007f319fdb3429
RDX: 0000000020000140 RSI: 0000000000003b83 RDI: 0000000000000003
RBP: 00007f319fe26610 R08: 00007ffd7a738908 R09: 00007ffd7a738908
R10: 00007ffd7a738908 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd7a7388f8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/01 03:40 upstream 3ffea9a7a6f7 757f06b1 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in iopt_map_pages
2024/06/05 14:16 upstream 32f88d65f01b e1e2c66e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in iopt_map_pages
2024/06/05 13:13 upstream 32f88d65f01b e1e2c66e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in iopt_map_pages
* Struck through repros no longer work on HEAD.